I have a bose multimedia speaker system with bass unit and two satellites. Recently, I got them out of storage after two years. They now produce a loud hiss even when not plugged into my PC. The first time I plugged them in my PC after storage I left them on for about 15 mins and the hiss went away. I played a music CD and they sounded ok. The following day when I restarted my PC the hiss resumed, but this time it remained. I unplugged them from my PC but the hiss is still there and doesn't go away. Bose says they are unrepairable because they don't have parts for that model anymore. Any suggestions? Thanks in advance.
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A hissing sound indicates the speaker amplifier has no input from the computer sound card, check to make sure the speakers are hooked up to the correct port for audio out to the speaker input, the Audio output to the speaker is the GREEN mini RCA jack on the back of the computer.
this is possible, however not a very good idea. Bose speakers are designed a little different than other brand speakers, the Equalizer built into the bose system will probably not sound amazing when you hook up your other speakers. Are you looking for more bass? cleaner highs?
if you want more bass, you could try doubling up your subs, if you want cleaner highs you could buy Bose Jewel Cube Speakers (purchased from a Bose Built-Invisible Dealer
I had the same problem for many months. I asked a sound & video professional and he suggested I move the subwoofer away from any power source. I had the subwoofer next to my UPS. Once separated and moved all wiring away from the power supply (about 12") the low bass hum was practically gone.
I suspect that the speaker levels need to be set. You connected everything right - many people would not have connected the sats via the bass section (which has their high pass crossover and overload protection). But I am betting the HSU is turned up a bit on the high side.
Try this. Set all speakers to small, set all levels to 0. Play the receiver in stereo all mode. If the bass is strong, you need to turn the HSU down closer to a natural sound. Then use the speaker setup tone and adjust as needed.