Since a long time i wanted to check out DIY Amplifier design and building (see http://ideas.kanojo.de/ for a rough timeline oO). As a first-tryer i opted for a Headphones amp as a friend is a real HighEnd-Headphones fanatic and well … it’s simpler and cheaper – you don’t need large capacitors, big heatsinks, uber-powersupplies … all nice n tiny.
The Amplifier itself is a TexasInstruments TPA1517NE Class-AB Amplifier that is driven at a voltage of 18V (to be able to supply a reasonable signal for high-impedance (600ohms) headphones. The Schematic is almost the application note except for enlarged output capacitors to lower the cutoff frequency of the output-filter. Both powersupply and amp reside on on PCB.
The casing is made from 15mm Multiplex, routered at the edges. The volume-control knob is also routered from the same 15mm MPX material. The edges are routered along with 45*
Buuut, as this is a picpost, here they come:
And last but not least it was finished off with a nice chen (from touhou) application: