Amazon has the Pyle Home PCA1 30 Watt Stereo Mini Power Amplifier for $9.99 with free shipping on $35+. Goes for $28+ elsewhere. No-frills amp connects to a pair of speakers and puts out 15 watts of power per channel. Measures 5.6''(W) x 2.2''(H) x 4.2''(D) and has very good reviews from Amazon customers.
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