MAMEWorld Forums - The Loony Bin - Re: question about speakers & amps

> I'm a novice when it comes to speaker systems, so hopefully someone can help me out.
> Here is what I'm working with (spec information is based on what I've found on the
> internet):
>
> Peavey PV 1500 Stereo Power Amp
> circa 2005
> 750W/ch @ 2 ohms
> 500W/ch @ 4 ohms
> 300W/ch @ 8 ohms
> Input Gain Knobs set to max (+32 dB) for both inputs
> DDT enabled for both inputs
> High-Pass/Low-Cut 40 Hz filter enabled for both inputs
> Channel A (Left) Speakon connector -> 1 speaker
> Channel B (Right) Speakon connector -> 1 speaker
>
> Peavey Model-115 International Series III Oak Speakers
> circa 1989
> 3-way: 1505-8 Black Widow woofer, 22XT driver w/ CH-3R horn, HT-94 tweeter
> 8 ohms
> 200W continuous / 400W program / 800W peak
> Crossover 1500 Hz & 8000 Hz
>
> The right speaker (B) sounds fine, but the left speaker (A) is barely playing any
> sound. The DDT light for channel A flashes red from time to time. The fan on the
> power amp seems to run faster at random times, even if there isn't a lot of loud
> sound being played.
>
> I'm trying to figure out if the speakers are considered connected in parallel, which
> from what I've read would mean that the amp is running 4 ohms instead of 8 ohms. If
> that's true, it would mean that the 400W speakers are getting 500W, which could be
> the reason that the left one isn't working properly now.
>
> Here is my proposed solution: hook the good speaker to the channel A output and have
> the channel B output empty, while also turning down the channel B gain knob to the
> min setting. The amp would then send 300W to the 400W speaker and the fan shouldn't
> be running in fast mode since it's not under stress.
>
> Does that seem right and is there any way I could get the bad speaker working again?
>
> Thanks.

Have you tried just connecting the one speaker and tried all the sources? Tried switch cleaner in the source select? I was working on an amp not long ago that had little to no sound out of the left channel but there was a reverse stereo option, turning that on made the right channel not work, switch cleaner in the tape/source select knob fixed it

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