JBL 4315A/4315WXA 4315A: 350,000yen(one-set, around the 1978 time) 4315WXA: 360,000yen (one-set, around the 1978 time)

A compact-also in studio monitor-shaped 4 ways speaker system.

2108 of a 20cm cone type Woofer is adopted as low-pass 2203A of a 30cm cone type Woofer, and inside low-pass, and the horn type tweeter 2405 is adopted as a mid-high range 2105 of a 13cm cone type squawker, and for super-high regions.

It hangs by supporting metal fittings on the back, and a placement is also possible.

Finish of an enclosure has two kinds, 4315A becomes gray finish and 4315WXA serves as walnut finish. The black grill was attached to the saran network at 4315A. The blue grill was attached to 4315WXA. 

Scheme	4 ways, 4 loudspeaker bass-reflex scheme, and a bookshelf type
Unit	For low-pass: 30cm cone type (2203A) For inside low-pass: 20cm cone type (2108) For mid-high ranges: 13cm cone type (2105) For high regions: Horn type (2405)
Play frequency band	35Hz - 20kHz
Cross over frequency	400Hz, 2000Hz, 8000Hz
Directivity	80 degrees x 60 degrees (16kHz)
Impedance	8ohms
Output sound pressure level	89dB (new Japanese Industrial Standard)
Allowable input (RMS)	60W
Enclosure dimension	Woofer: 91L Mid Woofer: 2.8L
Dimensions	Width 521x height 854x depth of 327mm
Weight	43kg

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JBL 4313BWX 160,000yen(one set)

They are a diameter Woofer of 25cm, a diameter squawker of 13cm, and the compact 3 way system constituted from a diameter dome shape tweeter of 2.5cm. The optimal monitor loudspeaker for carrying out in the control room of a recording studio or a broadcast station, and an editorial office.

The result of the technology of JBL which have improved the image lateralization, such as an in-line placement of an extensive directivity unit and adoption of the good newly developed network of a phase response, has realized the transparent sound which was excellent in the property. 

Scheme	3 ways, 3 loudspeaker bass-reflex scheme, and a bookshelf type
Unit	For low-pass: 25cm cone type For mid ranges: 13cm cone type For high regions: 2.5cm dome shape
Play frequency band	40Hz - 18kHz (±3dB)
Cross over frequency	1000Hz, 4000Hz
Directivity	130 degrees (15kHz)
Impedance	8ohms
Output sound pressure level	89dB/W/m
Allowable input	40W
Enclosure dimension	34L
Dimensions	Width 362x height 597x depth of 252mm
Weight	21kg

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JBL 4313WX 142,000yen(one-set, around the 1979 time)

Diameter Woofer LEof 25cm 111A, the control monitor system which adopted the in-line placement which attached three units of the diameter tweeter 066 of diameter squawker LEof 13cm5-9 or 2.5cm in a straight line on the vertical axis. 

Scheme	3 ways, 3 loudspeaker bass-reflex scheme, and a bookshelf type
Using unit	For low-pass: 25cm cone type (LE111A) For mid ranges: 13cm cone type (LE5-9) For high regions: 2.5cm dome shape (033)
Frequency characteristic	40Hz-18kHz±3dB
Allowable input	40W(RMS)
Impedance	8ohms
Cross over frequency	1000Hz, 4000Hz
Output sound pressure level	89dB (new Japanese Industrial Standard)
Enclosure internal volume	34L
Dimensions	Width 362x height 578x depth of 252mm
Weight	19.3kg

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JBL 4312M 64,000yen(It is 1 set in two sets, around the 2000 time) Three-set 1-set package 4312M3:96,000yen(It is three sets and is 1 set.)

The style and appearance of 4312 serieses are the 3 way speaker systems which downsized to desktop as it is.

The 13.3cm white cone Woofer is carried in low-pass.
The accordion-pleats edge which raises a paper cone diaphragm and the swing linearity of a cone is adopted, and also the aluminum die-casting frame is adopted as a frame.

The 5cm cone type unit is adopted as a mid range. Moreover, the 1.9cm replace pure titanium dome tweeter is adopted as the high region.

The Attenuator which can adjust independently each sound pressure level of a mid range and a high region is carried.
Respectively, a coordination is possible for three steps.

It is little magnetic-shield design of influence in TV footage.
Moreover, the installment to the surface of a wall or a ceiling is possible by using optional mounting Plunkett etc.

Moreover, there was also 4312M3 package which made 4312M a three-set set (three-set 1 set 96,000yen). 

Scheme	3 ways, 3 loudspeaker bass-reflex scheme, and a bookshelf type - Magnetic-shield design
Unit etc.	For low-pass: 13.3cm cone type For mid ranges: 5cm cone type For high regions: 1.9cm dome shape
Frequency characteristic	60Hz - 40kHz
Output sound pressure level	89dB/2.83V/m
Impedance	4ohms
Allowable input	75W(RMS)
Cross over frequency	5000Hz, 10000Hz
Dimensions	Width 181x height 300x depth of 180mm
Weight	4.0kg
Option	Mounting bracket MTC-520 (an It is 1 set in two sets, 8,000yen) Adapter for ceilings MTC-601 (an It is 1 set in two sets, 3,600yen)

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JBL 4312SX 115,000yen(one-set, around the 2000 time)

The speaker system which expanded a power range of crown compass by leaps and bounds, and aimed at the correspondence to DVD-Audio, SACD, etc.

2213H which is a 30cm white cone type Woofer is adopted as low-pass.
The copper ribbon edgewise volume voice coil of the diameter of 75mm is used, and the SFG (symmetrical field geometry) magnetic circuit and the aluminum die-casting frame are adopted.
Moreover, the Aqua positive coating pulp cone is adopted as a diaphragm, and the accordion-pleats edge is used for an edge.

904Ti-1 of a 12.5cm pure titanium inverted dome mid range is adopted as a mid range.
In order to expand a waveguide-plunger motion area, while molding a diaphragm in the shape of a reverse dome shape, in order to suppress an occurrence of a splitting oscillation, the 37mm voice coil of a balance drive design is adopted.
The neodymium magnet is adopted as a magnetic circuit and the Tran Gent property and resolution are conjointly raised with the bucket structure by an aluminum die-casting frame, and the Ben Ted center pole piece which misses a back-pressure.

TW025Ti which is a 25mm replace pure titanium dome tweeter is carried in the high region.
a profit -- the lightweight aluminum voice coil which gave the Kopper coating to the pure titanium diaphragm of press molding is adopted.
Furthermore, "fellow fluid dumping" which heightens the vibration suppression effect is adopted at the same time it misses the heat of a diaphragm.

The succession variable Attenuator volume of a mid range / high region independency is equipped so that it can respond to usage various as a bookshelf type.

The enclosure has adopted the twin port type of a bass-reflex structure.
Moreover, while raising a baffle intensity by using 25mm thickness MDF material for a front baffle, the phase and diffraction of an inter-unit are controlled by forming a mid-high-range unit into flush mounting.
The sheath serves as walnut finish. 

Scheme	3 ways, 3 loudspeaker bass-reflex scheme, and a bookshelf type
Unit etc.	For low-pass: 30cm cone type (2213H) For mid ranges: 12.5cm reverse dome shape (904Ti-1) For high regions: 2.5cm dome shape (TW025Ti)
Frequency characteristic	40Hz-50000Hz±0dB
Output sound pressure level	93dB(2.83V/1m)
Impedance	6ohms
Allowable input	150W(RMS)
Cross over frequency	900Hz, 3800Hz
Dimensions	Width 362x height 597x depth of 299mm
Weight	20.0kg
Option	Loudspeaker table lamp JS-50 (one set, 25,000yen)

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JBL 4312BMKII 78,000yen(one-set , around the 1999 time)

The black type 3 way speaker system of 4312.
The unit has composition only 4312MKII and whose unit of a high region are different.

2213H of the 30cm white cone type unit which adopted the copper ribbon edgewise volume voice coil of the diameter of 75mm is adopted as low-pass.
The SFG (symmetrical field geometry) magnetic circuit which realized the low distortion, and the aluminum die-casting frame excellent in the mechanical intensity are adopted.

12.5cm mid range driver 104H-3 which belongs to the unit of LE5 system is carried in the mid range.

035Ti of the 25mm pure titanium dome tweeter which molded the pure titanium material of the high hardness into the dome shape of 25micro thickness is carried in the high region.
A diamond edge pattern original with JBL and a reinforcement rib excellent in the linearity are adopted.

The enclosure serves as a characteristic layout which is the black finish which performed emboss processing of the skid, and aimed at the convergence of the voice source.
Moreover, the Attenuator which became independent in the mid range and the high region is carried. 

Scheme	3 ways, 3 loudspeaker bass-reflex scheme, and a bookshelf type
Unit etc.	For low-pass: 30cm cone type (2213H) For mid ranges: 12.5cm cone type (104H-3) For high regions: 2.5cm dome shape (035Ti)
Frequency characteristic	45Hz - 20kHz (-6dB)
Output sound pressure level	93dB/2.83V/m
Impedance	6ohms
Allowable input	100W(RMS)
Cross over frequency	1100Hz, 4200Hz
Dimensions	Width 362x height 597x depth of 298mm
Weight	20kg

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JBL 4312MKII(WX/GY) 4312MKIIGY: 115,000yen(one-set, around the 2000 time) 4312MKIIWX: 105,000yen(one-set, around the 2000 time)

The 3 way speaker system which hits the advanced type of 4312.

30cm white cone Woofer 2213H which adopted the copper ribbon edgewise volume voice coil of the diameter of 75mm is carried in low-pass.
The SFG (symmetrical field geometry) magnetic circuit which drives a cone to low distortion by a symmetrical magnetic field, and the aluminum die-casting frame are adopted.

Cone mid range driver 104H-3 of the diameter of 12.5cm is carried in the mid range.

2.5cm replace pure titanium dome tweeter 052Ti which really molded the diamond structure edge original with JBL by precise processing technology is carried in the high region.

4312MKIIWX serves as a blue baffle and beautiful walnut Veneer-Sheet finish of grain, and the enclosure serves as 4312MKIIGY gray paint finish.

The Attenuator which can adjust independently the output sound pressure level of a mid range and a high region is carried. 

Scheme	3 ways, 3 loudspeaker bass-reflex scheme, and a bookshelf type
Unit etc.	For low-pass: 30cm cone type (2213H) For mid ranges: 12.5cm cone type (104H-3) For high regions: 2.5cm dome shape (052Ti)
Frequency characteristic	45Hz - 22kHz (-6dB)
Output sound pressure level	93dB/2.83V/m
Impedance	6ohms
Allowable input	100W(RMS)
Cross over frequency	2000Hz, 5000Hz
Dimensions	Width 362x height 597x depth of 298mm
Weight	20kg

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