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Technical Manual

S312

Studio Series

ACOUSTIC & ELECTRICAL SPECIFICATIONS:

• Nominal Impedance

8 ohms

• Max Amp Power

250 watts

• Frequency Response

35 Hz - 20 kHz  

• Sensitivity

92 dB (1 watt @ 1 meter)

• Crossover Frequency

750 Hz, 3000 Hz

SYSTEM COMPONENTS:

• Enclosure

S312 (Not for sale)

• Grille

335147-002

• Low Frequency Transducer

12

PolyPlas

Shielded 

(335151-001)

DC Resistance

5.6 ohms ±10%

• Mid Frequency Transducer

4” PolyPlas

™ 

Shielded

(335439-001)

DC Resistance

4.3 ohms ±10%

• High Frequency Transducer 1” (25mm) Titanium dome

Shielded (335663-001)

DC Resistance

3.4 ohms ±10%

• Crossover Network

335412-001

AURAL SWEEP TEST SPECIFICATIONS:

• A. System Aural Sweep Test 6.0V Input 30 Hz to 20 kHz
• B. L.F. Aural Sweep Test

6.0V Input 30 Hz to 1 kHz

• C. M.F. Aural Sweep Test

4.0V Input 500 Hz to 4 kHz

• D. H.F. Aural Sweep Test

2.83V Input 3 kHz to 20 kHz

PHYSICAL SPECIFICATIONS:

• Enclosure dimensions:

41” x 16” x 12

⁷⁄₈

” (H x W x D)

1041mm x 406mm x 327mm

• Weight

68 lbs. /31kg Each

WARRANTY: 

• Refer to Warranty Statement packed with each product.

Owner's Manual 
335404-001
Warranty Card
331994-001
Survey Card
331384-001

OWNER'S

MANUAL

Upper/Lower
Foam
335408-001

Microfoam
(2pcs.)

Outer Carton
335403-001

PACKAGING

02/00

JBL Consumer Products, Inc. 250 Crossways Park Dr., Woodbury, New York 11797                                   

S312 

Studio Series

Driver
High Frequency
335663-001

Driver
Mid.Frequency
335439-001

Driver
Low Frequency
335151-001

YELLOW/BLACK

WHITE/BLACK

GREEN/BLACK

WHITE

GREEN

YELLOW

Crossover Network
335412-001

–         +

+IN

–IN

INPUT

GREEN

BLK/GREEN

WHT/BLACK

WHITE

YELLOW

YEL/BLK

RED

BLACK

L.F.

M.F.

+

H.F.

250

+

+

205

205

110

205

110

L1

3.5mH

R1

2.4/10W

C1

50

µ

F

100V

C2

0.01

µ

F

250V

R3

40/5W

R2

1.2/10W

R4

0.62/10W

L2

400

µ

H

C3

20

µ

F/100V

C4

0.01

µ

F/250V

C5

6

µ

F/100V

R5

10/5W

L3

220

µ

H

C6

0.01/250V

S312 SCHEMATIC

WIRING DIAGRAM

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