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testing amps is easy, you need a high amperage 12 volt power supply (these are available at radio shack from around 50 dollars on up) and a multimeter. A reliable test speaker and a reliable source unit will also pay great dividends. For a convenient source unit, I usually use a cd walkman with an rca adaptor because I like to keep my troubleshooting equipment portable. In your case you could simply run rca's from a home cd player to the amp.
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