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One channel of the amplifier seems to cut out

I have two onkyou M-1501 amps that have the same problem. When I run them with my home theatre to get more watts, it seems that one of the channels (L or R) cuts out so that it can barely be heard.

In the past I ran 2 or 3 speakers to the same channel to get it to bridge, this may have caused the problem.

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I see now how it could have happened to both amps. Yes, this triple speaker combo will cause this problem.

Next time if you want to run speakers like that, instead of parallelling them, series them.
That way the load is balanced between the speakers.

Here is a great primer, dont worry about the calculations and mumbo jumbo, the pictures should tell you what you need to know to get it done.

http://www.termpro.com/articles/spkrz.html


also when you talk about bridge, that is usually done on the amp rather than the speaker. For example I could have a 4 channel amp, and bridge it to 2 by combining the channels, BEWARE not just parrallell again, there will be a specific order for each different amp and it will be marked.
You can also bridge a two channel amp to make one Single channel amp with almost double the power, but again only to one channel, now that its bridged.

Hope that helps once again. I'm going to look up that amp, if you want more specifics.

Charles

Posted on Jan 09, 2009

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1 Answer

Conversion to home theatre


You will need a separate stereo amplifier for the 901's to accommodate the need for the Active EQ. There is no way to separate your receiver's front L&R channel preamplifiers from their amplifiers.

I run a Carver AV-406 (5-channel amp) for my 901's in Front, 2 Subwoofers and the Rear Surround channel, with the Active EQ between the receiver and the 901's amp channels. My receiver controls everything and just drives the Center and Surrounds. You would probably just get a nice 2-channel amplier for the 901's. If your receiver requires a powered Subwoofer so you would need another amplifier channel for that, too. Therefore, you might look around for a powerful 3- or 4-channel amplifier so you could drive the Sub, too.

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For connection I would run a pair of RCA cables from the Front L&R Audio Line OUT to the Active EQ's Line IN; then the EQ's Line OUT to a separate amp's Line IN. Attach the 901's to the new amp, run through the receiver's setup procedures for volume, etc and you're done.

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You have a shorted speaker, crossed speaker wires Or a blown speaker. The amp is reacting to the short.

Start with one speaker by itself, unplug the rest. Check the polarity. Run it on the channel that cuts out. can you replicate it? Check the connections on the amp, and see if they are really close to touching.

Absolutely if it happens on both amps, unless you bought both B stock or Remanufacturerd and they have the same problem. This is rare

Hope that helps you!

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