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Btag
April 5th, 2003, 11:43 AM
This might be a lenghty description, please bear with me. My equipment consists of a Yamaha HTR-5460 reciever, a TN1225 sub with the 150 watt amp, and some JBL Studio series bookshelves.
Basically when I try to hook up my computer (via 1/8" miniplug to RCA adapter) to my reciever, AND my subwoofer to my reciever, there are sparks and smoke and other bad things. Right now I have my computer hooked up to my reciever and it works fine. I can hook up my sub to my reciever without the computer and it works fine. Just when the two are connected. I thought it might be a grounding problem, so I connected a wire from the grounded prong of an electrical plug to the Phono ground of my reciever. This didn't help. If I have my sub connected to my reciever, and I hold the RCA jacks comming from the computer and touch the bottom chassis of the reciever I get shocked. The weirdest thing is I had this setup before and it worked perfectly fine. I'm in a different building now though, could this be the problem? The surge protector I have my reciever plugged into has the Grounded light on. Any ideas?

Dr_Hsu
April 5th, 2003, 2:38 PM
Are the computer and stereo equipment plugged into the same outlet? If not, you might have an outlet that is wired incorrectly. The reason you have sparks when you connect the 150W amp is because the 150W amp's power cord is grounded. Your "live" computer is then shorted to ground, causing sparks. You can float the ground on the 150W amp power cord to avoid sparks, but then your system will be live.