I had ATI 1502 two-channel stereo Power amplifier.which preamp match for ATI 1502 two-channel stereo Power amp?

Any preamplifier will work with any power amplifier. Keep in mind that preamplifier are not very common any longer. The receiver has taken over the market and the preamplifier are mainly in the higher end of the audio.In the same token you do not see many stereo system in the market today.

Go online to emotiva.com they sell stereo preamplifier. Hope this will help you out.

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