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The Dayton Audio DTA-2.1BT2 amplifier provides clean Class D power from an extremely compact and lightweight design. Enough power for most speakers and is also able to power a passive subwoofer. Built from the Dayton Audio DTA-2.1BT the improved design gives the user the ability to adjust the sub crossover frequency. This allows you to create an inexpensive and high-performance 2.1 set up for any office bedroom or small home theater. The Dayton Audio DTA-2.1BT2 is a discrete whole system amplifier that provides output for 2 speakers and a passive subwoofer. This design allows you to create a compact 2.1 setup for virtually any room whether it be an office bedroom or even a small home theater. The 2 x 50W output power is more than enough for most bookshelf speakers and the subwoofer output of 100W is ideal for a small subwoofer. The reason the DTA-2.1BT2 is able to produce this exceptional power in such a small package is the Class D topology that is being utilized. This amplifier technology also provides high-efficiency for a low power draw on your electrical system.