JBL S4HC User Manual

EXPLODED VIEW

WIRING DIAGRAM

ITEM NO. DESCRIPTION QTY. PART NO.

1. Survey Card 1 331384-001

2. Owner’s Manual 1 338636-001

3. Warranty Card 1 338322-001

4. Mounting Bracket 4 337722-001

5. Top & Bottom Pads 2 337826-001

6. Outer Carton 1 338635-001

7. Tweeter 1 335663-001

8. Woofer 2 335899-001

9. Midrange 1 336327-001

10. Woofer Gasket 2 335657-001

11.Midrange Gasket 1 335656-001

12. Tweeter Faceplate 1 335695-001

13. Tweeter Bezel Gasket 1 336613-001

14. JBL Logo 1 48003-01

15. Terminal Cup Ass’y 1 336616-002

16. Cup Ass’y Gasket 1 336773-001

17. Grille 1 337598-001

18. Grille Retainer 6 333249-001

ITEM NO. DESCRIPTION QTY. PART NO.

19. Flower Pot 1 334072-001

20. Crossover Network 1 338527-001

21. Screw (midrange) PB, HXS, 4 908302-012 #6 x .75," ZNC

22. Screw (network) PB, PPH, 4 903401-010 #6 x 5/8," BLK

23. Screw (woofer) PB, HXS, 8 903802-016 #6 x 1," ZNC

24. Screw (tweeter) PB, HXS, 4 908302-012

#6 x .75," ZNC

25. Screw (input cup) PB, HXS, 6 908301-012 #6 x .75," BLK

26. T Nut 1/4 x 20 8 339051-001

27. Screw (bracket mounting) MS, 8 900501-012 PPH, 1/4 x 20 x .75" BLK

28. Screw (S4HC installation) MS, 8 900201-006 PPH, 8-32 x .375" BLK

S4HC

Serial Number

System Impedance:

6 Ohms

Northridge, Ca

JBL Incorporated

Made in USA

SYNTHESIS 4

HORIZONTAL CHANNEL

(2)

(4)

(6)

(8)

S4HC Cabinet – Not for Sale

(6)

(4)

15 16

JBL S4HC Synthesis Four

JBL Loudspeaker Troubleshooting/Repair Tips

Most customers prefer to do simple loudspeaker repairs themselves. By following the steps below, a majority of loudspeakers can be returned to their original factory performance with minimum effort. Choose the example that best describes the problem you are experiencing.

Problem 1: No sound or distorted sound from one loudspeaker in a pair (or set)

Connect the dead/distorting loudspeaker to a different amplifier channel (one that had a functioning loudspeaker connected to it). If it functions normally, the problem is not loudspeaker-related. If the loudspeaker still makes no sound or sounds distorted, a wire may have become loose or disconnected, the network (also known as a crossover) may be defective, the drivers (woofer, tweeter, etc.) may be defective or, in very rare cases, all may be defective.

Refer to the wiring diagram and exploded view below. The network is a small circuit board found on the inside of the terminal cup, or mounted to an inside wall of the enclosure. It sends low-frequency sounds to the woofer, high-frequency sounds to the tweeter and, if applicable, mid-frequency sounds to the midrange driver. Make sure all wires are secure and connected. Look for components on the network that look burnt, “bulged,” or abnormal. If everything looks normal, connect the network to the drivers from another matching loudspeaker. MAKE SURE you attach the correct wires to each driver – mid- and low-frequency sounds can damage the tweeter! If there is still no sound or distorted sound, the network is defective. If there is clean undistorted sound, the drivers are defective.

Problem 2: No sound or distorted sound from one or more (but not all) drivers in an enclosure

Remove the problem driver(s) from the enclosure and make sure all wires are secure and connected. If they are, proceed with the following test: Woofer or midrange driver – Connect the driver’s + and – input terminals directly to the loudspeaker wires from your receiver/amplifier and play some music at a reasonable volume. If the driver now sounds normal (produces a clean, undistorted sound), the network is most likely defective. Tweeter – Replace the tweeter with a functioning tweeter from another loudspeaker. If the tweeter now functions normally (produces clean, undistorted sound), the original tweeter is defective. If the replacement tweeter also sounds distorted or produces no sound, the network is most likely defective.

Problem 3: Loudspeakers distort, rattle or pop at higher volumes

This is usually NOT a loudspeaker problem. Common causes are too much power (playing the loudspeakers too loud and causing them to distort), an amplifier with not enough power (the amplifier can’t produce the required volume without distorting), excessive equalization (turning the tone controls too far clockwise, and/or engaging the loudness/bass boost button on your receiver) or some combination of the above. If only one loudspeaker is exhibiting the problem, and you’re confident that it’s not caused by too little power/too much power/excessive equalization, see solutions for Problems 1 and 2.

NETWORK 338527-001

LOW-FREQUENCY

TRANSDUCER

335899-001

HIGH-FREQUENCY

TRANSDUCER

335663-001

MID-FREQUENCY

TRANSDUCER

336327-001

LOW-FREQUENCY

TRANSDUCER

335899-001