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Old 04-19-2016, 11:50 PM
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djwhog djwhog is offline
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You probably have this.
http://www.davidsaudio.com/IRS_Beta_Manual.pdf

So from what you describe and the age etc, to me sounds like a leaky cap or caps in the circuit. A good audio/ electrician repair tech should be able to test and find the bad part or parts.

I think I recall back in the day some folks pulled these apart and upgraded most of the caps etc with better grade parts as well. I am sure you have surfed around and I see non on eBay, the agon etc. it would be nice to stay near stock, maybe at least call Madisound maybe they know someone too if they won't offer repairs. I am sure there are folks that fix these, also what about audio classics, they not only sell used gear, they repair as well.

Good luck, it would be a major chore to build a passive crossover, it can be done, I have built many, but in subs it is most times these days cheaper to go active.

Best luck keep us posted

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