JBL 3678-LF - User Manual

JBL Incorporated, 8500 Balboa Boulevard, P.O. Box 2200, Northridge, California 91329 U.S.A.
JBL3678-LF REV H
PACKAGE
WIRING DIAGRAM
09-03
Technical Manual
JBL3678-LF
SPECIFICATIONS
ACOUSTIC & ELECTRICAL SPECIFICATIONS:
• Nominal Impedance: 8 ohm
• Power Capacity: 300W (Passive) IEC Noise
HF: 50W
LF: 600W (Bi-Amp)
• Frequency Range: 30 Hz to 20 kHz (–10dB)
w/3678HF - Passive Mode
• Sensitivity: 98 dB SPL*
• Crossover Frequency: 1 kHz
SYSTEM COMPONENTS:
• Cabinet: C3678
• Grille: None
• Low Frequency 380mm (15 in.) Paper Cone
Transducer: Transducer (2226HPL)
• DC Resistance: 5.0 ohm ±10% Aluminum Wire
*1 Watt (2.83 V RMS) @ 1 Meter
SYSTEM COMPONENTS: (cont’d)
• Crossover Network: N3678-LF (129-20015-00)
AURAL SWEEP TEST SPECIFICATIONS:
A. System Aural Sweep Test: (w/3678HF Connected)
7.0V Input, 20 Hz to 20 kHz
(Passive Mode)
B. L.F. Aural Sweep Test: 10.0V Input, 20 Hz to 1.2 kHz
PHYSICAL SPECIFICATIONS:
• Enclosure Dimensions: 765mm x 651mm x 292mm D
(30.13 x 25.63 x 11.5 in. D)
• Shipping Weight: 98 lbs. (44 kg.)
WARRANTY INFORMATION:
• Refer to Warranty Statement packed with each product.
Warranty 59660
Literature 980-00018-00
Owners Manual 980-00023-00
Corner Pad (8)
991-00015-00
Microfoam (4)
74309
Carton
990-00165-00
SCHEMATIC N3678-LF (129-20015-00)
Speaker,
Low Freq
2226HPL
Cone Repl
C8R2226
ORN/BLK
GRN/BLK
GRN
+ LIN
– LIN
–
HIN
+ HIN
ORN
YEL/BLK
YEL
*
JUMPERS
L3
2.0mH
L4
1.1mH
R4
26
R5
26
R6
26
R7
26
C4
4.5µF
R3
10
C2
10µF
C3
24µF
C1
2.5µF
C6
18µF
C5
26µF
L1
0.6mH
L2
3.9mH
GRN
T12
+ LOUT
T11
T10
T9
– LOUT
T8
– HOUT
T5 + HOUT
T3
– TOUT
+ TOUT
BUS WIRE
T7
T4
T6
WHT
INPUT
R1 16
WHT/
BLK
B1
B2
GRNBLK
NOTE: POSITIVE VOLTAGE TO NETWORK ( + ) INPUT PRODUCES FORWARD CONE MOVEMENT.
*
*
*
*
Network
N3678-LF
(129-20015-00)
SK3
2 Each

Summary

JBL3678-LF Specifications

Acoustic and Electrical Specifications

Details on nominal impedance, power capacity, frequency range, sensitivity, and crossover frequency.

System Components

Lists cabinet, grille, low frequency transducer, and DC resistance for the system.

System Components Continued

Information on the crossover network, continuing system component details.

Aural Sweep Test Specifications

Provides test specifications for system and LF aural sweep tests.

Physical Specifications

Enclosure dimensions and shipping weight details for the product.

Warranty Information

Guidance to refer to the warranty statement packed with the product.

Component Exploded View

Network Wiring Instructions

Instructions for operating the network in passive or bi-amplified mode using jumpers.

JBL 3678-LF Specifications

General

Nominal Impedance	8 ohms
Enclosure Type	Vented
Sensitivity	98 dB, 1W @ 1m
Driver	15-inch (381mm) differential drive woofer
Type	Low Frequency Loudspeaker
Low Frequency Driver	15-inch (381mm) differential drive woofer