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I built the K-502 stereo integrated amplifier kit and use it with a pair of single-driver Fostex speakers. The amp performs way above its price point.

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• K-502 Amp System

Have you modded yours? Could it use better transformers and caps? I would guess that is where cost cutting was done.

Thanks, Don

For $125 or so, it really is a no-brainer. Although I'm sure it could use better transformers and caps, the real weak point is probably the potentiometer. I built mine bone stock, precisely so I could hear how it sounded "as is" and without designer parts. I'm using it in a dusty environment -- my garage/shop (lots of speaker-related MDF dust, evil stuff) -- and the open (not potted) pot understandably got dust in it. I try not to change the volume too much. This should not be a real problem in most settings, but the pot is a cheap affair and the amp would probably benefit from a better one.

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• Tempest Construction Pix

• Thread describing K-502 kit listening impressions (highly subjective)