I fried my AV Receiver

[pegleri]

<font color='#000000'>I finally got around to setting up my Marantz 8200 yesterday and enjoyed watching a couple of movies and listening to a DVD-Audio recording and some cds. &nbsp; Today, I put a cd in my Marantz 8300 universal player and hit play. &nbsp;The sound coming out of the front speakers was strangely muffled and I wasn't able to turn it up or down. &nbsp;The receiver then went into Protect mode several times and then came out of it. &nbsp;At that point a flash happened inside the receiver (right near the volume knob) which lasted for about 30 seconds. &nbsp;I blew out the fire(?) and got a nice nose of burnt electronics.

It's only 2 weeks old, so the place I bought it agreed to replace it no questions asked.

My question (s) to this group is:

-could this have been caused by driving 4ohm front speakers the remaining speakers are all 8ohm. &nbsp;I can't find anything in the receiver manual for power ratings into 4 ohms, only 6 or 8 ohms? This is a pretty beefy receiver (120 w/channel), so I didn't think this would matter, but?

-I soldered my speaker wires to some banana connectors could this have caused the flame out?

-Is this just a faulty receiver?

Thanks</font>

 

[Guest]

<font color='#000000'>This is a pretty beefy receiver (120 w/channel), so I didn't think this would matter, but?

To be beefy requires stability into 4-ohm loads, no matter what the rated power is. You're always risking problems if you drive speakers below the minimum impedance rating of your amp. The vast majority of the time it's not a big deal, but it can mean reduced output and excessive heat.

That being said, I think the catastrophic failure you described is due to a short. I'd check your soldering very carefully. Make sure no stray wires are crossed. Your dealer may not be so accommodating it it happens again! If the wiring is all okay, then the fault probably was within the receiver. What speakers are we talking about, btw?</font>

 

[pegleri]

<font color='#000000'>they are pair of old ('80s) Japanese Victor SX-7 speakers. &nbsp;I guess JVC (from Japan, not the American arm) used to make high quality separates rather than just a bunch of mid-level stuff. &nbsp;Anyway, they sounded fantastic when I used to drive them with my McCormack DNA .5 dedicated stereo amp. &nbsp;I figured they would make decent full sounded fronts given I don't have a subwoofer yet.

Thanks for the input, I'll check the solder and wrap any exposed wires.</font>