JBL 3678-LF Bedienungsanleitung

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

2.0mH L4

1.1mH

26 R5

26 R6

26 R7

4.5µF

10µF

24µF

2.5µF

18µF

26µF

0.6mH

3.9mH

GRN

T12 +LOUT

T11

T10

T9 –LOUT

T8 –HOUT

T5 +HOUT

–TOUT

+TOUT

BUS WIRE

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

JBL3678-LF

COMPONENT EXPLODEDVIEW

Speaker, Low Freq

2226HPL

Cone Repl

C8R2226 T-Nut (8)

61861

10-32

T-Nut

835-44061-00

5/16-18

Gasket

63285

Cabinet

C3678

Screw

902801-012

5/16-18 x 3/4

PH BLK

Gasket

359-00050-03

Label

73276S

Port Cover, Foam

382-00085-00

Port Tube (2)

331163-001

Screw (8)

804-01110-16

10-32 x 1

FIL, PH, BLK,

ZINC

Network

N3678-LF

129-20015-00

Screw (8)

882-41110-12

No. 6

PH BLK

3678-LF NETWORK WIRING INSTRUCTIONS:

The internal network of the 3678-LF (low frequency section) can be used to operate the system in

either passive or bi-amplified mode.

The network comes pre-configured for passive

crossover operation, with four jumpers in

place, as shown:

To bypass the internal passive crossover net-

work for bi-amplified operation, remove all four

jumpers and connect as shown:

Note that in both passive and bi-amplified mode, the same HF driver cable connection is made.

Cable

(Not Included)

256-00035-00

Jumpers

(4 Each)

63-0098-0000

from

amplifier

from HF

amplifier

from LF

amplifier

to HF Driver to HF Driver

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