1 # 20 Watt Audio Amplifier
3 This is an amplifier based on a National Semiconductor LM1875 that Bdale and
4 Robert built to use playing around with an electric pickup on Bdale's
5 violin. The ultimate objective is to have a modest effects chain with amp
6 and speaker that Robert can use when playing music with his friends. We chose
7 to start by building a high-quality amplifier.
11 This part family came to Bdale's attention for other reasons, and the
12 apparent simplicity with which a 20 watt amplifier could be built with the
13 [LM1875](http://www.national.com/mpf/LM/LM1875.html) made it seem like a
14 good choice as a starting point. Samples
15 were obtained, and the first prototype wired up using the split supply
16 example application circuit in the data sheet just worked... and worked
21 A schematic for this circuit based on the data sheet reference design is in
22 the [hw/audio](http://git.gag.com/?p=hw/audio;a=summary) repository at
23 [git.gag.com](http://git.gag.com).