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Technical Manual
4312/4312B MkII R/L
JBL Consumer Products, Inc. 250 Crossways Park Dr., Woodbury, New York 11797
7/01
ACOUSTIC & ELECTRICAL SPECIFICATIONS:
• Nominal Impedance: 6Ω
• Max Amp Power 150 watts*
• Frequency Response 45 Hz – 22 kHz (-6dB)
• Sensitivity: 93dB@2.83 volts/1 meter
• Crossover Frequency: 2000Hz, 5000Hz
SYSTEM COMPONENTS:
• Cabinet 4312/4312B MkII R/L
(Not for Sale)
• Grille:
Grill (Blk) 61989
Grill (Blue) 61989-01
• Low-Frequency Transducer 2213H
DC Resistance 5.0 Ω±10%
• Mid-Frequency Transducer 104H-3
DC Resistance 4.3 Ω±10%
• High-Frequency Transducer: 4312 MkII – 74856 (052Ti)
4312B MkII – 68669-02
(A035TiA)
DC Resistance 3.5 - 3.8 Ω
• Crossover Network 4312 MkII – 332276-001
4312B MkII – 66324-0060
AURAL SWEEP TEST SPECIFICATIONS:
• System Aural Sweep Test 6.0V Input 40 Hz to 22 kHz
• L.F. Aural Sweep Test 5.0V Input 40 Hz to 2.5 kHz
• M.F. Aural Sweep Test 4.0V Input 1 kHz to 6 kHz
• H.F. Aural Sweep Test 2.83V Input 4 kHz to 22 kHz
PHYSICAL SPECIFICATIONS:
• Enclosure dimensions: 23-1/2” x 14-1/4” x 11-3/4”
(597mm x 368mm x 298mm)
• Weight 48 lbs (21.7 kg) Each
WARRANTY:
• Refer to Warranty Statement packed with each product.
* The maximum recommended amplifier power rating will
ensure proper system headroom to allow for occasional peaks.
We do not recommend sustained operation at these maximum
power levels.
PARTS LIST
WIRING DIAGRAM
4312/4312B MkII R/L
DESCRIPTION PART NO.
WOOFER GASKET 32756-01
PORT TUBE 52211
GASKET (TWT) 66553
FLOWER POT 76041
OUTER CARTON 332269-001
(Walnut & Dark Grey)
332269-002
(Grey)
334889-001
(Black)
WARRANTY CARD 331994-001
END PAD (2) 47218-01
T-NUT (4) 61861
DAMPING PAD 73906
DUAL TERMINAL 323892-001
FACEPLATE (TWT) 68643-02
4312 MkII — 74856 (052Ti)
4312B MkII — 68669-02 (AO35TiA)
4312 MkII — 332276-001
4312B MkII — 66324-0060
NETWORK,
4312/4312B MkII R/L SCHEMATIC
+IN
-IN
TWEETER,
+
YEL
C1 10 uF
C2 .01 uF
C3 3.0 uF
—
YEL/BLK
R1 8 ohm
L-PAD
WHT/BLK
WHT
GRN
GRN/BLK
GRN/BLK
GRN
WHT
WHT/BLK
YEL
—
+
MIDRANGE,
104H-3
—
+
WOOFER,
2213H
L.F.
.250
M.F.
.250
.205
+
—
+
—
+
C4 .01 uF
.2 mH
L1
R2 8 ohm
L-PAD
YEL/BLK
H.F.
.110
—
00301
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