After the successful prototype around the TPA6120A2 headphone amplifier
I wanted to build something that could easily be used day by day on your
desktop or next to your listening seat. I.e. having a nice enclosure,
preferably with a build in power supply (I hate those wall-warts).
Hence a take 2 of the design where I also took the opportunity to try out
some new things.
I’m the lucky owner of a Devialet Expert Pro 250
(which started as the D Premier many moons ago) driving a pair of Martin Logan CLX Art.
(Yes, it’s as good as the many raving reviews say. If you have to chance to buy one,
Every serious audiophile knows that properly grounding his equipment is of
utmost importance to obtain the best possible sound quality. Of course
companies have realised this and offer their
own, very expensive, solutions. However, it can be a lot simpler, better
and above all, a lot cheaper.
Another problem I encountered with my cheap CNC 3040 was the cheap spindle. First problem
was that it started vibrating (a lot) at certain speeds. Another problem was the higher
than expected run out (i.e. rotation inaccuracy which occurs when the tool is no longer
aligned with the main axis).
Now that everything is working properly, armed with a fresh set of blank PCB’s and
plenty of CNC mills it’s time to try out if machining a PCB is feasible.