I decided to re-case my PPAv2, since the last case was absolutely hideous.
A big thanks goes out to the electrical engineering department here for letting me use their tools. A big thanks goes out to my Dad as well, who came out to the Academy this weekend for Parent's Weekend and bought/properly broke the acrylic to the proper sizes. The acrylic is 1/4 inch thick.
I just finished a quad of AMB Labs Mini3s. Two are 'performance' configured using AMB recommended opamps at U4 and U5 and Schottky diodes at D2 and D3. The other two are 'extended runtime' configured, again with AMB recommended components. They all run beautifully with absolute black background, great extended base and high end, but with a very neutral, easy to listen to sound. The overall sound is quite like the M3 to me. Here a few photos.
PPAS
BUF: LMH6321 OP_AMP: AD8620/10
wrap some copper tape around the BUF as heatsink. I sound really great. I am going to case this up with my alien DAC.
My MAX is cased up, at least as best as I can do for now.
I haven't used a dremel in a while and will work on a design to get the top of the case on in a way that won't be too messy I hope. Next MAX, I think I'm going to try the Gen II's for a good fit
Here are the photos for my new PPAV2. All the parts are extremely matched for same position across L, R, G channel, 0.1% Vishay-Dale resistors, ELNA SilmicII elect caps, OPA637BP for L&R, OPA627BP for G, SO8 TLE2426ID, KIMBER TCSS CABLE, NKK Switches, silver soldering......... Soon it would be modded into my own non-standard configuration.
Originally Posted by skyline889 /img/forum/go_quote.gif Nice work! That's a very clean build.
Thanks!
Originally I worried about too many internal cables as I need (Two sets of) INUPUTs and Power(Sigma22_DC_IN vs Future_Battery_IN) are selectable. Later it worked out nicely......
I've made a Cmoy to use with my Rio Karma. Since it has no line-out except through the dock, I had to think outside the box.
It's a weird-looking device but I had to try it. I haven't seen any successful attempts to use Karma's line out in a portable setup.
Normally the dock looks like this:
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