After trying out several low power, low cost amps, I've decided to use the Sure Electronics
2x25W, TPA3123 Class-D Audio Amplifier Board.
The Sure Electronics Class-D dual channel amplifier board employs a Tripath-style Texas Instruments TPA3123D2 chip. Each channel is rated at 25W, delivered with state-of-the-art sound quality:
Pre-assembled, pre-tested
Superb sound quality
Perfect Class-D architecture
Two channels—each up to 25W
Up to 92% efficiency
Does not require a heat sink for most applications
Line level analog audio input
All for around $25!
(Sure Electronics p/n AA-AB018)
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