Marantz SM6100SA ver.2 38,000yen(2003 release)

Stereo power amplifier which raised completeness by supplying Absolute SA Technology which improves a part, and a powering and wiring based on SM6100SA.

Current feedback type power amplifier is adopted as a power amplifier part, and the transistor LAPT for audios is adopted as a power device.
Moreover, in Ver.2, the schottky-barrier diode is carried in each rectifier circuit of a power-source part.

The high-quality sound polypropylene capacitor and the low-noise metal film resistor are adopted as each circuitry.
Moreover, the shake of potential is lost by improving, while grand potential also repeats a tone-quality study.

In addition to a direct input terminal, the variable input terminal which set the maximum gain as the same 29dB as a common AV amplifier is carried. This supports the destination broad from 2ch audio to upgrade of a home theater system.
Moreover, the direct input is set as the same gain as the power part of PM8100SA ver.2 and PM6100SA ver.2, and a by amplifier drive is possible for it.

The stack of two or more SM6100SA ver.2 is carried out, and the through output termination which can be driven is carried simultaneously.

The speaker terminal by German WBT is adopted as a speaker terminal.

The inlet type AC jack is adopted. 

Form	Stereo power amplifier
Output power (20Hz - 20kHz, both channel simultaneous drive)	70W+70W (4ohm) 60W+60W (6ohm) 50W+50W (8ohm)
THD (20Hz - 20kHz, both channel simultaneous drive, 8ohms)	0.01%
Cross modulation distortion (SMPTE)	0.01%
Output bandwidth (an 8-ohm load intensity, 0.04%)	10Hz - 50kHz
Frequency characteristic	5Hz-80kHz+0 -1 dB
Dumping factor (8 ohm, 20Hz - 20kHz)	100
Input sensitivity/impedance	Direct input: 1.5V/28kohm Variable input: 0.7V/33kohm
S/N (an IHF A network, input short-circuit)	Direct input: 110dB
Input terminal	Direct: One line Variable (variable): One line
Output-terminal	Through output: One line Speaker: One line
Supply voltage	AC100V, 50Hz/60Hz
Power consumption (Electrical Appliance and Material Safety Law)	135W
The maximum Dimensions	Width 440x height 124x depth of 324mm
Weight	7.5kg
Adjunct	AC cable

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Marantz SM6100SA 36,800yen(2000 release)

Stereo power amplifier developed by the basis of the "simple & flexible power amplifier concept" like SM-17SA.

The current feedback type is adopted as a power amplifier part.

The variable input is also carried in addition to a direct input. The variable input is set as the same 29dB as a common AV amplifier in the maximum gain.
Moreover, the direct input is made into the same gain as the power part of PM6100SA, and the use as a by amplifier drive is possible for the time of a combination using.

The stack of two or more sets of the SM6100SAs is carried out, and the through output termination which can be driven is carried simultaneously.

The termination by the German WBC company is adopted as a speaker terminal.

The inlet type AC cable is adopted. 

Form	Stereo power amplifier
Output power (20Hz - 20kHz, both channel drive)	70W+70W (4ohm) 60W+60W (6ohm) 50W+50W (8ohm)
THD (20Hz - 20kHz, both channel drive)	0.01% (at the time of an 8-ohm load intensity)
Cross modulation distortion (SMPTE)	0.01%
Output bandwidth (an 8-ohm load intensity, 0.04%)	10Hz - 50kHz
Frequency characteristic (compact disk, Source Direct)	5Hz-80kHz+0 -1 dB
Dumping factor (20Hz - 20kHz)	100 (8-ohm load intensity) or more
Input sensitivity/impedance	Direct input: 1.5V/28kohm Variable input: 0.7V/33kohm
SN ratio (an IHF A network, input short-circuit)	Direct input: 110dB
Supply voltage	AC100V, 50Hz/60Hz
Power consumption (Electrical Appliance and Material Control Law)	135W
The maximum Dimensions	Width 440x height 124x depth of 320mm
Weight	7.5kg
Adjunct	AC cable

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Marantz SM1000 950,000yen

Description 　 Stereo power amplifier which supplied all the technologies which a Marantz of those days has, eliminated all the cost restraints entirely and developed them. In order to be stabilized moreover and to take out the Oide power of the channel 400W of one side high-definition, the whole page is considered for the power block as the perfect push pull stream composition. And 18 single-sided channels use the power transistor which attains to PC200W. It divides into every 3 six groups, and drives with six drivers. It is a circuitry only using the best fraction of the reality of hfe in which luxury is not. By the original Low-TIM design, since the open loop gain was stopped very low with 56-57dB, the amount of NF which has an ill effect on a dynamic behavior is decreased just like thermionic-tube amplifier. The dual transistor and diode array which arranged the property with the glass epoxy double-sided through hole platform with a high robustness developed for computers ideally are used for each point. Furthermore, these have been arranged to the perfect symmetry, also electrically, it acted to perfect one as Izzi of the fator also in temperature, and the occurrence of DC drift is banished from the material and the circuitry. A tone quality deteriorates, so that the number of contacts increases. In SM1000, in order that even a speaker termination may pass a direct signal without a contact, the speaker protection relay is eliminated. If DC component should occur for a speaker component, an original SCR crowbar circuit detects and the fuse of a primary side is cut immediately, and it is the De Dis charge about the energy in a power source capacitor. A speaker is early protected certainly rather than a relay protector. A cut-core transformer with the capacity of 800VA. The mass audio capacitor of 23500 micro Fx2 of the Marantz requests for price quotations which investigated the merit of the tone quality thoroughly from the property of the hearing is carried. These begin the power-source part splendidly located in a line symmetrically, and SM1000 is the right-and-left independent stream composition which incorporated similar two sets of monophonic amplifier and which was put into practice. The finger heat decipator borne by the technology of NASA is adopted as the heat radiator of a power transistor. A proved thing is further improved by P510, five kinds of fins with which length is different are attached to each power transistor, and forced-air cooling is carried out by a cooling fan. And the temperature of a heat sink is detected, and it is carrying out mechanized variable [ of the rotation of a cooling fan ] so that it may always maintain at constant temperature. This has prevented the transition of the tone quality by temperature unevenness. The logarithmic comression supporting type power meter which can be monitored without a range switchover from the Koide power to the Oide power is adopted. Although it is a peek operation, the value which an index number shows is the output window to an 8-ohm operation as it is. Speaker terminations total three lines of SUB1 which can switch switchpoints with the switchpoint in a front ceiling panel other than the direct termination along which it does not pass at all, and SUB2. The input terminal which can perform a selection of DC amplifier and AC amplifier. Canon termination equipment which can respond as a pro youth besides a RCA-pin terminal.

Form	Stereo power amplifier
Output power (20Hz - 20kHz)	400W+400W (8ohm) 650W+650W (4ohm)
THD (20Hz - 20kHz)	0.01% (8ohm) 0.03% (4ohm)
Frequency characteristic	(+0, -1dB) :DC-100kHz
Input sensitivity/input impedance	2.83V/27kohm
Dumping factor	300 (8ohm)
Remains noise	26 microvolts (A network)
S/N ratio	126dB (A network)
Power consumption	Electrical Appliance and Material Control Law: 985W
Power source	100V, 50/60Hz
Dimensions	Width 483x height 178x depth of 550mm
Weight	42kg

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Marantz SM700 690,000yen(around the 1988 time)

"Straight wire Wiz gain " It is the stereo power amplifier developed aiming at the implementation of the ideal of amplifier.

It is considering an included whole page as perfect DC amplifier of a perfect push pull stream composition about the output stage for which 12 per single-sided channel used the metal can power transistor,The original Low-TIM design is realized and the purity of high power is raised with the straight signal path which switched with all capacitors from the input to the output, and banished the contact.

The speaker termination carries two lines of a factice 1-2 as another system with one direct.
The emitter and output-terminal of the power transistor are linked directly, and the direct termination can send out the power of a high purity.

The SCR crowbar circuitry which does not have a contact in an output was adopted as the protector which protects a speaker from DC component, and the positive operation is attained, without degrading a tone quality.

The mass transformer and custom-made capacitor of 800VA are adopted as a power-source part, and it has L-R full independence composition.

The high precision logarithmic comression indication type which can carry out the Direct reading of the output of an 8-ohm load intensity is used for a peek power meter.
The two-step change of a recovery time can be performed.

The heat-dissipation system has adopted the efficient type by the original finger decipator and 2 speed clean fan.


Consideration is carried out to details, such as a chassis structure which banished the formation of a high purity oxygen-free-high-conductivity-copper line of all the product lines, adoption of a polar window large capacity power supply cord, and a magnetic distortion. 

Form	Stereo power amplifier
Output power	450W+450W (4ohm) 265W+265W (8ohm)
THD	0.01% or less
Frequency characteristic	DC-100kHz+0 -1dB
Input sensitivity/input impedance	1.5V/70kohm
Dumping factor	300 (8ohms) or more
SN ratio (IHF-A)	123dB
Power consumption (Electrical Appliance and Material Control Law)	580W
Dimensions	Width 483x height 182x depth of 522mm
Weight	48kg

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Marantz SM-50 52,800yen(around the 1980 time)

Slim type component of a Marantz Stereo power amplifier of component stereo 50 series.

The amplifier circuitry has realized the Low-TIM design by DC amplifier stream composition of DC servo IC loading.

Newly developed EI transformer that is excellent in a high region property and has a margin in a collector loss is adopted as a power-source part.

The power meter of the logarithmic compression mold which can read peek power (4ohm and 8ohm) without a changeover of a range is carried.

Two speaker terminations are carried and it can sound simultaneous or separately. 

Form	Stereo power amplifier
Output power (20Hz - 20kHz, both channel drive)	50W+50W (8ohm)
THD (20Hz - 20kHz, 8ohm)	0.02%
Cross modulation distortion (SMPTE, 8ohm)	0.02% (at the time of an Output power)
Frequency characteristic	5Hz-50kHz+0 -0.3 dB
Input sensitivity/impedance	1.5V/32kohm
Dumping factor	80
SN ratio (IHF-A)	120dB
Supply voltage	AC100V, 50Hz/60Hz
Power consumption	125W
Dimensions	Width 416x height 73x depth of 302mm
Weight	7.9kg

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Marantz SM-17SA ver.2 100,000yen(2002 release)

Stereo power amplifier which attained high-quality sound-ization by supplying Absolute SA Technology based on SM-17SA.

Absolute SA Technology which is the circuitry high speed technology original with a Marantz of improving a powering, a part, and wiring is supplied.

When making the BTL (MONO) interconnection of SM-17SA ver.2 by by amplifier interconnection with PM-17SA, a convenient -6dB Attenuator is carried.

The speaker terminal by German WBT is adopted.

A heat up status can be checked in warmup meter.

The inlet type AC cable is adopted. 

Form	Stereo power amplifier
Output power	100W+100W (4ohm) 80W+80W (6ohm) 60W+60W (8ohm) 200W (at the time of the BTL interconnection 8ohm)
THD (20Hz - 20kHz, both channel simultaneous drive, 8ohm)	0.01%
Cross modulation distortion (SMPTE)	0.01%
Output bandwidth (an 8-ohm load intensity, 0.04%)	10Hz - 50kHz
Frequency characteristic	5Hz-100kHz+0 -1 dB
Dumping factor (8 ohm, 20Hz - 20kHz)	100
Input sensitivity/impedance	Main in: 1.6V/22kohm
S/N (an IHF A network, input short-circuit)	High Level:112dB
Input terminal	Main in: One line
Output-terminal	Speaker: One line
Supply voltage	AC100V, 50Hz/60Hz
Power consumption (Electrical Appliance and Material Safety Law)	180W
The maximum Dimensions	Width 458x height 110x depth of 407mm
Weight	15.5kg
Adjunct	AC cable

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Marantz SM-17SA 90,000yen(September, 1999 release)

Flexible stereo power amplifier which enabled not only an independent using but the combination using with PM-17SA.

Circuitry gazes at affinity with PM-17SA, is designed, and has adopted the current feedback circuit like PM-17SA.

The voltage amplification module adjustable HDAM circuitry original with a Marantz is carried.

The thing made from German WBT is adopted as a speaker terminal.

The warm-up meter which can check a heat up status is adopted.

The high rigidity body structure which adopted aluminum is adopted as a chassis.

Not only an independent using but a combination stream composition with PM-17SA is possible.
Moreover, the using as monophonic power amplifier by the BTL interconnection is also possible not only as stereo power amplifier.

The inlet type AC cable is adopted. 

Form	Stereo power amplifier
Input/output terminal	Main in: One line Speaker output: One line
Output power (20Hz - 20kHz)	At the time of both channel drive : 100W+100W (4ohm) 80W+80W (6ohm) 60W+60W (8ohm) At the time of the BTL drive : 200W (8ohm)
THD (20Hz - 20kHz)	0.01% (both channel drive, 8-ohm load intensity)
Frequency characteristic	5Hz-100kHz+0 -1 dB
Dumping factor	100 (an 8-ohm load intensity, 20Hz - 10kHz)
SN ratio (an IHF A network, input short-circuit)	112dB
Supply voltage	AC100V, 50Hz/60Hz
Power consumption (Electrical Appliance and Material Control Law)	180W
The maximum Dimensions	Width 458x height 110x depth of 407mm
Weight	15.5kg
Adjunct	AC cable

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Marantz SM-11 400,000yen(around the 1988 time)

Stereo power amplifier which pierced through the orthodox approach which the Marantz accumulated through the development of many high power amplifier, and was completed.

In order to obtain high power by a high quality, the power transistor with the especially excellent linearity is adopted. With the parallel three-step darlington circuit stream composition of four, a total of 16 power transistors are used.
Moreover, the reduction in a noise and a Low-noise-izing are attained, without realizing simple-ization, improving a nakedness property and applying a lot of NFB by adopting a cascode circuitry as all the voltage amplification stages.

The soy milk of a high regulation large-sized power transformer and the custom-made electrolytic capacitor for audios developed specially is carried out to the power-source part.
Especially the electrolytic capacitor adopted the high-class screw termination type of computer grade, and has acquired the high robustness.

The large-sized peek power meter is carried.
A logarithmic compression mold indication is adopted, and it can monitor, without switching a range from a very small output to the maximum output.
Moreover, as for the recovery time of meter, Normal/Peak Hold is switched by the switchpoint of the front panel.

The AC code to which remote which can control ON/OFF of the power source of power amplifier by the preamplifier side is attached is carried without letting a big electric current pass in a preamplifier directly.
The large current which serves as a noise source from the interior of the preamplifier which treats a weak signal by this is banished, and the influence on a tone quality is suppressed. 

Form	Stereo power amplifier
Output power	300W+300W (4ohm) 265W+265W (8ohm)
THD	0.008% or less
Frequency characteristic	10-100kHz+0 -1dB
Input sensitivity/input impedance	1.5V/22kohm
Dumping factor	100 (8ohms) or more
SN ratio (IHF-A)	120dB
Power consumption (Electrical Appliance and Material Control Law)	400W
Dimensions	Width 454x height 200x depth of 476mm
Weight	30kg

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Marantz SM-10 220,000yen(1980 release)

Stereo power amplifier which can be used also as Oide power monophonic power amplifier.

As the Marantz of former years made stereo power amplifier #15 develop combining monophonic power amplifier two sets, the structure completely considered as the right-and-left independent stream composition to the heat sink or the bonnet is adopted.

Circuitry has the composition of having stopped Dynamic Strain by the Low-TIM design of Marantz original. Moreover, in AB class, in order to obtain the tone quality which is not inferior to a pure Class-A, the super high ft transistor which has an amplification property which is generous to a super-high region in the parallel push pull amplification stage by a three-step Darlington connection is adopted, and switching distortion is reduced.
A changeover of a pure Class-A and AB class is possible for an operation, and also it is an enable also as AB class monophonic power amplifier by the BTL interconnection.

In addition to a large-sized transformer, the power-source fraction has adopted "single-sided channel 22,000micro-Fx2" for the capacitor for audios of reliable computer grade.

The protection network by high-speed relay of temperature sensor adoption is built in, and the robustness is improved.

The gilding treatment input terminal is adopted.

The independent power switch and gain control which arranged the sub panel only for right and left are carried. 

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Marantz SM-9 225,000yen(around the 1982 time)

Stereo power amplifier developed based on the tradition of the Marantz of employing the highest power device efficiently completely in the optimal operation and the best circuitry.

The nakedness property is sharply raised by using a super high fT (90MHz) power transistor for the circuitry of a whole page push pull perfect DC stream composition.
The Low-TIM design original with a Marantz which banishes a TIM by low NFB-ization was put into practice, and AB class output quality from Loule Bell to the maximum output has been obtained.

In the power-source part, the interference between channels and between stages is suppressed by carrying the mass transformer which made the sub- side the right-and-left perfect separate volume structure in power amplification stages, and also carrying an exclusive transformer also in the voltage amplification stage.
Furthermore, powering capacity with the stable margin is secured by reliable stream compositions, such as adoption of filter capacitor 15,000micro-Fx4 excellent in the RF property.

The oxygen-free-high-conductivity-copper line of a high purity is adopted as all the included lead wire for the drawer line of a transformer.
Moreover, the direct speaker termination which does not pass a contact is carried apart from the subspeaker termination in which 1 / 2 changes are possible.

The energy sensor type which detects an excessive output and always suppresses the signal of a drive transistor in a safety area is adopted as a protection network.
It is the design focused on musicality which opens an output wide and does not interrupt a performance.

High precision peek meter and a traditional sub panel are carried in the front panel, and it has become the design stored in the mahogany cabinet. 

Form	Stereo power amplifier
Output power (20Hz - 20kHz, both channel simultaneous operation)	150W+150W (8ohm)
THD (at the time of 20Hz - 20kHz, and an Output power)	0.01% or less
Cross modulation distortion	0.01% or less
Frequency characteristic	DC-100kHz+0 -1dB
Input sensitivity/impedance	1.5V/30kohm
Dumping factor	100 (1kHz, 8ohm) or more
SN ratio (IHF-A)	120dB
Power dissipation (Electrical Appliance and Material Control Law)	400W
Dimensions	Width 474x height 172x depth of 345mm
Weight	23.5kg

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Marantz SM-8 150,000yen(around the 1982 time)

Stereo power amplifier which carries a Quarter A circuit.

The Quarter A system is constituted by the input level detector and the fast-switching circuitry,A bias current is fixed and it is considered as a perfect pure Class-A operation, and if fixed power (SM-8 30W) exceeds the power (SM-8 30W-120W), it has a structure automatically switched to AB class operation.
While realizing the power quality which was excellent in the pure Class-A, crossover distortion and a transitional distortion are driven into the minimum also at the time of a high power drive of AB class operation by adoption of a super high fT power transistor, or original Low-TIM design.
Basic circuitry has whole page perfect push pull DC amplifier composition which built in the servo circuitry.

Special resin filling raises thermal resistance to a power-source part, and super audio capacitor 22,000micro-Fx2+20,000micro-Fx2 by which the mass transformer with a compact, and a property and a tone quality were examined are carried in it.

The high heat pipe of the heat-dissipation effect was adopted, and the stable operation of a power transistor is guaranteed also at the time of the Class-A operation which consumes a large current, and the maximum output of AB class.
Moreover, the protection network which detects an excessive output and maintains the power stage in an area of safe operation is carried, and a speaker is driven in the status that it was stabilized.

The logarithmic comression window type peek meter which can carry out the Direct reading of the output of an 8-ohm load intensity is carried in the front panel.
Moreover, in a sub panel, the selector and power switch which can choose the concurrent of a switchpoint and 2 sets of speakers or independent drive which switches the recovery hold time of a meter pointer are equipped. 

Form	Stereo power amplifier
Output power (20Hz - 20kHz, both channel simultaneous operation)	120W+120W (8ohm)
THD (at the time of 20Hz - 20kHz, and an Output power)	0.015% or less
Cross modulation distortion	0.015% or less
Frequency characteristic	5Hz-100kHz+0 -1 dB
Input sensitivity/impedance	1.5V/47kohm
Dumping factor	100 (1kHz, 8ohms) or more
SN ratio (IHF-A)	118dB
Power dissipation (Electrical Appliance and Material Control Law)	300W
Dimensions	Width 474x height 172x depth of 345mm
Weight	16.5kg

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Marantz SM-7 220,000yen

Power amplifier developed aiming at Low-TIM-izing.

A main-amplifier part is adopting the source follower amplifier by Dual-FET which had the perfect DC amplifier stream composition, and also arranged the pair property with the first rank, and has prevented the property failure by the impedance variation of an input stage. Moreover, it constitutes with the differential-amplifier -> emitter-follower buffer amplifier by Dual-Tr, and three-step darlington circuits which carried out parallel push pull adoption of newly developed super high fT-Tr are consisted of by the power amplification stage.
This super high fT transistor is an emitter ballast type power transistor of that time newest which was produced based on Low-TIM thought and which should also be called crystal of an LSI process technology and a RF Tr technology.
fT is a thing of the Marantz requests for price quotations which shows 60MHz, is excellent in a RF property and a switching characteristic, and has a stable amplification performance of a margin to a super-high region in spite of big Pc called 200W. Thereby, SM-7 is crossed to a super-low-pass wide band from a super-high region, and the high-speed responsibility is improving to particularly.

The large-sized power transformer which remains unmoved also at the time of the maximum continuous output in a rated load is carried in a power transformer. The secondary side has a separate volume structure into which the right-and-left channel was made to divide completely.
Furthermore, the mass type of 15000 micro Fx4 is used for a capacitor. The high power of 150W+150W is supplied calmly.

High precision meter loading which can carry out the Direct reading of the peek of an Output voltage in the wattage at the time of decibel and an 8-ohm load intensity.
The Koide power time to the time of the Oide power can monitor a tick mark without the change of a range for logarithmic compression mold.

An ASO detection type protection network is carried. If the output current and a voltage exceed an area of safe operation, a signal will be restricted to a safe value in an instant. An output transistor is protected without spoiling faithful reappearance of a music signal. 

Form	Stereo power amplifier
Output power	150W+150W (8ohm) 190W+190W (4ohm)
Output bandwidth	5Hz - 100,000Hz
THD	0.01% or less (20Hz - 20kHz, 8-ohm load intensity)
Cross modulation distortion	0.01% or less
Frequency characteristic	: (+0, -0.2dB) 20Hz - 20kHz (+0, -1dB) :DC-100kHz
Input sensitivity/impedance	1.5V/30kohm
Dumping factor	100 (8-ohm load intensity) or more
Remains noise	0.034mV (IHF-A curve)
Power consumption	At the time of the maximum output: 850W Electrical Appliance and Material Control Law: 400W
Power source	100V, 50/60Hz
Dimensions	Width 416x height 146x depth of 332mm
Weight	22kg
Option	Cabinet WC-77(walnut finish):8,000yen WC-77N(mahogany finish):12,500yen Exclusive rack handle RHA-7:4,000yen(1 set)

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Marantz SM-6 128,000yen

Stereo power amplifier which can change a pure Class-A and AB class.

The pure Class-A operation is adopted and the output at the time of a pure Class-A serves as 30 W/ch. Moreover, it can be used also as AB class operation 120 W/ch by switchpoint change.

The material is selected carefully and adopted while introducing an advanced Low-TIM design.
There is sufficient margin for a collector loss in a power transistor, and the high speed high fT transistor which was moreover excellent in the high region property is adopted. The cut-off frequency of quantity is 90MHz, and this transistor suppressed switching distortion which was not able to avoid AB class, and, moreover, has also realized flattening of a high region phase response.
Moreover, it has a whole page perfect push pull DC amplifier stream composition in circuitry, a modification of a nakedness property is aimed at, and the amount of NF is reduced. TIM distortion is decreased without spoiling a static characteristics. Furthermore, DC drift which poses a problem with DC amplifier also controls a property by the part and DC servo circuitry which were arranged ideally, and the height of a robustness is also thoroughgoing.

In the exothermic by pure Class-A operation, a heat-pipe scheme is adopted and heat is radiated. Heat is drawn outside a circuitry by a heat pipe, and heat is radiated by the radiator.

The 22,000-micro F super audio capacitor driven in from double-sideds of a property and an audition is used for a capacitor, and it is thinking as important the rich musicality which does not appear in a data.
Moreover, the transformer was filled up with the special resin and it has succeeded in a heat-resistant measure and miniaturization.

The highly precise large-sized power meter of a logarithmic comression indication is arranged, and the Direct reading of the power at the time of an 8-ohm load intensity can be carried out. And the speaker selector in which a class A switchpoint, a power switch, two speaker changes, and a simultaneous play are possible was equipped in the traditional sub panel, and it is finished in the simple design.

* The photograph has equipped the option mahogany cabinet. 

Form	Stereo power amplifier
Output power (20Hz - 20kHz, both channel drive)	120W+120W (AB class) 30W+30W (Class-A)
THD	0.015% (at 20Hz - 20kHz, the time of an effective output 8-ohm load intensity)
Cross modulation distortion	0.015% (at the time of 60Hz:70kHz=4:1 and an effective output)
Frequency characteristic	20Hz-20kHz:+0, -0.2dB + 0, 5Hz - -5dB : 100kHz
Input sensitivity/impedance	1.5V/47kohm
Dumping factor	100 (1kHz, 8-ohm load intensity)
S/N ratio	118dB (IHF-A curve)
Power dissipation	Electrical Appliance and Material Control Law: 320W
Power source	100V, 50/60Hz
Dimensions	Width 416x height 146x depth of 332mm
Weight	14.5kg

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Marantz SM-5ver2 520,000yen(around the 1998 time)

The version-up model which pursued low-noise-ization of the off-site part further based on SM-5.

The low-impedance drive design is adopted and speaker drive capacity is heightened.

DC clean drive by bb-5 is possible for buffer amplifier and the power amplifier first rank.

New HDAM (a gilding specification and high-speed voltage amplification module) of a newly developed four-layers substrate structure which realizes high S/N is adopted.

The output stage has parallel push pull composition which adopted the RF large-sized power transistor. 

Form	Stereo power amplifier
Input/output terminal	Line input: One line Balance input: One line Speaker output: One line
Output power (20Hz - 20kHz)	200W+200W (4ohm) 100W+100W (8ohm) 400W (at the time of 8 ohms and the BTL interconnection)
THD	0.005%
Frequency characteristic	10Hz-100kHz+0 -1 dB
SN ratio	120dB
Input sensitivity/impedance	1.5V/10kohm
Power consumption	500W (Electrical Appliance and Material Control Law)
The maximum Dimensions	Width 454x height 201x depth of 450mm
Weight	33.0kg

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Marantz SM-5 520,000yen(1994 release)

　
Stereo power amplifier designed on the assumption that cooperation with SC-5 and exclusive battery unit bb-5.

Even if the impedance of a speaker falls, the low-impedance drive design is practiced so that sufficient electric current can be supplied. Thereby, also in combination with the speaker of the low-impedance that an Integrated Amplifier will be brandished, the correspondence of a margin is always realized and powerful drive capacity has been acquired.

To input buffer amplifier and the power amplifier first rank, DC clean drive is possible.
Ability can be demonstrated by the combined use with battery power-source bb-5 for exclusive use.

A total of six NEW HDAM of a four-layers substrate structure is used.
This evolved further the high-speed voltage amplification module and HDAM by the original technology of a Marantz, and has gained the accelerating of a circuitry, the stabilization, and high S/N.

The output stage is using the RF large-sized power transistor by the parallel push pull.

The large-sized toroidal power transformer and the low double foil chemicon are used for a power-source part.

What can be set up at a 1dB step is adopted as an Attenuator.

High vibration suppression nature is secured to the chassis construction by the copper plating zinc die-casting chassis and the aluminum plate-mill panel. 

Form	Stereo power amplifier
Output power (20Hz - 20kHz)	200W+200W (4ohms) 100W+100W (8ohms) 400W (8 ohms, BTL)
THD	0.005%
Frequency characteristic	10-100kHz+0 -1dB
Input terminal	Imbalanced input x2 Balance input x1 DC input x1
Input sensitivity/input impedance	1.5V/10kohm
SN ratio (A curve)	120dB
Power consumption (Electrical Appliance and Material Control Law)	500W
Dimensions	Width 454x height 201x depth of 450mm
Weight	33.0kg

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Marantz Model 500 595,000yen( at the 1972 time(?))

Stereo power amplifier which how the distortion of a high region at the time of full power is pressed down as a high power machine or how the distortion at the time of mini power is lost pursued, and was developed.

What a Marantz and Motorola, Inc. developed jointly is adopted as a power transistor, and SJ is attached to the model number after M.
Moreover, made-to-order resistors and switchpoint are adopted.

The hardwired-connection preamplifier part of SEPP which circuitry allotted the differential-amplification circuitry first is placed, and the power amplifier part of the usual whole page hardwired-connection pure complimentary OCL continues after that.
NF is doubly hung from the end of a preamplifier part, and the output unit of the power amplifier part.
The perfect push pull was used for the power amplifier part from the entry point to the outlet for the first time in the world. For this reason, even if it used the top's differential circuit, it was separately prepared for the up-and-down completeness, and to the last stage of a pure complimentary, the up-and-down independency was achieved completely, it amplified, and perfect symmetric property and dynamic behavior have been acquired.

Power stages are 8 parallel stone stream compositions 4 stones, and are carrying out 3 stone Darlington (counting 4 stone parallel with one stone) adoption at one side ch. Sufficient idling electric current is sent, AB class operation of this power transistor is carried out, and a notching distortion peculiar to transistor class B amplification is pressed down.

When a certain unusual operation takes place, the thing of 2 stone stream compositions which prevent stopping an electric current in the drive stage and an excessive electric current flowing into a power transistor is used for a protection network.
The limiter circuit of the power change of 500W/300W/100W is using a part of this protection network, and its principle of operation is also the same.
Moreover, in a speaker protection network, if direct current voltage appears in a speaker termination with the amplifier of 3 stone stream compositions, the output of a speaker terminal and power amplifier is intercepted by relay, and this serves also as the muting to it.
Use a relay for the rush-current preventing at the time of the power source ON for those with three piece in all, one is used for it, and remaining two are used for the prevention from a direct current of a muting-cum-speaker termination.

The forced-air-cooling fan is carried in the interior. 

Form	Stereo power amplifier
Output	8ohm(at the time of an Output power both channel, 20Hz - 20kHz): 500W (250W+250W), Typically 600W
THD	0.05% or less (at the time of 20Hz - 20000Hz, both channel, and an Output power)
Cross modulation distortion	0.05% or less (at the time of an Output power both channel, SMPTE)
Frequency characteristic	20Hz-20kHz±0.1dB
Power band Wiz (IHF)	5Hz - 45000Hz (THD 0.1%)
Input sensitivity	2.25V for 250W into 8 ohm load with Gain Controls fully clockwise.
Input impedance	33 kohm with Gain Controls fully clockwise.
Dumping factor	400 or more
Total Noise	better than 106dB below 250W Power (8ohm Load)
<Synthesis>
Voltage Conversion	Special tapped primary allows easy conversion to 110VAC or 220 VAC operation
Control	Independent front panel Gain Controls and Power Level Selector Switch
Dimensions	Width 425x height 171x depth of 435mm
Weight	37.6kg

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Marantz Model 250 245,000yen( at the 1972 time(?))

Stereo power amplifier which has also improved the quality at the time of a low power output.
A resistor, switchpoints, a transistor, etc. perform careful sorting and are adopted.

The differential amplification, the pure complimentary, and the whole page hardwired-connection OCL circuitry are used for circuitry.
The transistor of the perfect pair sorted out is adopted as the differential-amplification stage and the output stage of a push pull, and it is adjusted so that the basic circuit itself may balance in direct current naked.
The detector of the leakage in a direct current is carried on it.

In the conventional high power machine, it was made to operate in the status near B class at the time of a small level play, and a notching distortion peculiar to a transistor etc. had occurred.
In Model250, sufficient idling electric current was sent, AB class operation was carried out, and the outstanding nakedness property is realized.

The printed circuit board is made to become independent for every block, and the careful word of caution of avoiding an interference of the first rank and a final stage is carried out. 

Form	Stereo power amplifier
Output (At the time of an Output power both channel, 20Hz - 20kHz)	4ohm: 300W (150W+150W), Typically 340W 8ohm: 250W (125W+125W), Typically 280W 16ohm: 128W (64W+64W), Typically 150W
THD	0.1% or less (at the time of 20Hz - 20000Hz, and an Output power) Typically 0.05%
Cross modulation distortion	0.1% or less (At the time of an Output power They are two arbitrary frequencies among 20Hz - 20kHz. ) Typically 0.05%
Frequency characteristic	2Hz-100kHz+0 -1.5 dB 20Hz-20kHz±0.1dB
a power band -- the Wiz (IHF)	5Hz - 45000Hz
Input sensitivity/impedance	1.5V/100kohm
Dumping factor	100 (8ohms) or more
<Synthesis>
Total Noise	better than 106 dB below Rated Power into 8 ohm
Power source	AC100V, 50Hz/60Hz 220Volts optional on special order
Power consumption	500W
Dimensions	Width 362x height 156x depth of 241mm
Weight	12.7kg

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Marantz Model 240 195,000yen( at the 1972 time(?))

Power amplifier which collected the first things to adhere to all from a selection of a transistor to a resistor or switchpoints, carried out the careful coordination, and was finished.

The differential amplification, the pure complimentary, and the whole page hardwired-connection OCL circuitry are acted on a circuit system.
The transistor of the perfect pair chosen for choosing it as the differential-amplification stage and the output stage of a push pull is adopted, and it is adjusted so that the basic circuit itself may balance completely in direct current.

In the case of high power amplifier, when level is small, in order to carry out the operation near B class, a notching distortion peculiar to a transistor had occurred.
In order to cope with this, sufficient idling electric current was sent, AB class operation was carried out, and the nakedness property even when he has no feedback, to the extent that it is valid is realized.

A substrate is made to become independent for every block, and the interference of the first rank and a final stage is avoided. Moreover, even if it uses an earth line, the thing thick enough is adopted.

Two smoothing capacitors of 60V20000micro F are adopted as a power-source part. 

Form	Stereo power amplifier
Output (At the time of an Output power both channel, 20Hz - 20kHz)	4ohm: 300W (150W+150W), Typically 340W 8ohm: 250W (125W+125W), Typically 280W 16ohm: 128W (64W+64W), Typically 150W
THD	0.1% or less (at the time of 20Hz - 20000Hz, and an Output power) Typically 0.05%
Cross modulation distortion	0.1% or less (At the time of an Output power They are two arbitrary frequencies among 20Hz - 20kHz. ) Typically 0.05%
Frequency characteristic	2Hz-100kHz+0 -1.5 dB 20Hz-20kHz+0 -0.5 dB
a power band -- the Wiz (IHF)	5Hz - 45000Hz
Input sensitivity/impedance	1.5V/100kohm
Dumping factor	100 (8ohm) or more
<Synthesis>
Total Noise	better than 106 dB below Rated Power into 8 ohm
Power source	AC100V, 50Hz/60Hz 220Volts optional on special order
Power consumption	480W
Dimensions	Width 362x height 156x depth of 241mm
Weight	11.8kg

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