I have a powered JBL subwoofer as part of a HT speaker system SCS200.6, hooked up to an H/K AVR135 6.1 HT receiver.
The system worked fine for 2 years, and suddenly the sub is giving me trouble.
When it's turned on, it makes a short, garbled hiss, and would produce either no sound, or sound at a very low volume. It would produce sound after about 2 minutes, and then would not work for another 2 minutes, and this cycle continues.
Throughout, the signal indicator would remain 'green' indicating that the sub is receiving LFE signal input from the receiver.
My guess is a bad cap/caps.
Any precise way to locate the issue would be highly appreciated.
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Re: JBL Subwoofer - Intermittent operation
Sometimes bad caps show a lifting or rounding of the top of the cap, sometimes this top will split from heat and pressure and sometimes it will not show any sign of damage but will be dry inside and its capacitance value will drop to a very low value. Replace the big power supply caps and test again. Get the same size, value and voltage rating. You can go higher on voltage rating and a bit on value. Getting a similar size or something that will fit in the same space is important also.
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PAIRING THE JBL SB400 FOR WIRELESS OPERATION
After turning the soundbar and subwoofer on for the first time, you will need to "pair" the subwoofer and soundbar so they both operate at the same wireless frequency. To pair the units, press the Wireless Pairing switches on both units within 30 seconds of each other. The units will communicate with each other and operate at the same frequency.
Check the power socket you use ,if the grounding is not proper or if the wiring to socket is not wired with correct Live& neutral - should be the issue ,atleast 80% of the time it is this.. Ohh yes also the output from the system see if its connected properly or broken...
Check to see if it is properly hooked up to the player, and if it is, then either the amplifier's LFE(Low Frequency Emitter/Subwoofer) channel has failed, or the CPU is not beginning to forward frequencies 200Hz and below to the subwoofer. At 200Hz, the subwoofer adds to the satellite speakers, an then at 110Hz and below, only the subwoofer is playing.
The 'Subwoofer' output on your receiver is used to connect to a powered subwoofer with a built in amplifier. Your KLH speakers use what is called a 'passive' subwoofer, it gets its power from the receiver and then passes the higher frequencies to the left and right front speakers after taking out the low frequencies for the subwoofer. A speaker system with a passive subwoofer is good for casual listening, but a powered subwoofer is required for really hearing low frequencies and rumble in movies. The KLH speakers you have were highly rated in their time for their price. The four satellite speakers and center channel speaker have very good sound compared to the little 'midget' surround sound speakers most people buy today.
Here's how you hook them up:
- The left and right front channels from your receiver terminals should go to the terminals on the subwoofer marked 'From Amplifier'
- Your left and right front speakers are then connected to the subwoofer terminals marked 'To Speakers', they do not connect directly to your receiver.
- Your center speaker is connected to your receiver terminals marked 'Center'
- Your rear speakers are connected to your receiver terminals marked 'Surround'
That should get you up and running. If the bass isn't good enough with the passive subwoofer, you can get a decent powered subwoofer like the Velodyne VX-10 for about $150 and 'kick it up a notch'. Good luck and enjoy....
Well, as I know, your Cerwin Vega subwoofer is designed for use with stereo systems. Therefore, it has only 2 channels for input, and 2 channels for output as well. However, you can try this out; the first thing I suggest is that you hook up your main front channels through the subwoofer. All you have to do is to connect the subwoofer input to the front channel output on the amp, then hook up your front speakers to the satellite output on the subwoofer. As long as you make sure that system is working on 8 ohms, I believe this can activate the subwoofer.