Sure Electronics AA-AB33184 4x100W TDA7498 Class-D Amplifier Board<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>4 x 100W Class-D amplifier</li><li>Small footprint for space limited applications</li><li>Perfect amplifier for bi-amp applications</li><li>Built-in cooling fan and over-temp protection circuit</li><li>14 to 39 VDC power supply required</li></ul></div><img src="http://ecx.images-amazon.com/images/I/518teZuENnL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51VcWJRHtXL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41vB8KQhQnL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/419IAAhj8JL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51kuXX3LySL.jpg" noproxy>