Kanojo Blog Blog-Blog

7Apr/110

PicPost: Headphones Amplifier

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:

Schematics:

 

PCB Layout (600DPI):

 

Finished PCB:

 

Volume Knob (for Case):

 

Case with everything attached:

 

Inside of Case:

And last but not least it was finished off with a nice chen (from touhou) application:

 

 

 

 

 

 

 

 

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