I’ve been modifying my Gigaworks Ebay DAC and think that the results is really showing. The second opamp is completely removed, the filter is changed to Cirrus Logics filter example from their prototype board and the first opamp is replaced with GD-Audio’s Earth discrete opamp. It sounds absolutely marvelous. Here’s the before and after graphs.
Mods your Pioneer PD S-505 CD Player for better sound quality
So I bought this Pioneer PD S-505 for $40 to test how good audio quality I’m able to squeeze out by modifying it. But It will not be just the standard subjective judgment of improvement but also measurements. Back in 2000, you had to pay about $400 for it. It uses the stable platter which means you have to put the CD in upside down. So let’s get going.
Many months ago I bought a DAC to use with my computer in the bedroom to connect to my Musical Fidelity X-Can V2 for some headphone listening. I have used it, but not been impressed by it at all. But when surfing around, I got into this crazy page about installing a tube amp output on CD players and DACs. And he listed the cheap one I have as one of the best DACs he ever heard. The guy bypasses the output stage and replaces it with a simple tube buffer/amp. That got me interested.
I just bought a new Mac Mini Core Duo2 as a media player in my bedroom. I connected it an old 23″ Cinema display that I don’t use. First I was a bit annoyed that I needed to use the keyboard and mouse, but then I found Remote Buddy. What a relief! I can now do almost anything with Apples lovely simple remote. I’m going to use it for playing back my CD collection that’s been ripped to a large hardisk. Watching DiVX, DVD, MPG films on it. And watch TV with my EyeTV kit.
So the next step was getting the audio out of the mini. Well, let’s face it, the output quality from line-out isn’t something you can call great. So I’m about to order an Zhaolu DAC 2.5 and mod the crap out of it! I’m thinking of installing a ZapFilter, better clocking etc. I’m then going to use mini-spdif connector to get the digital data out from the mac to the DAC.
Now I just need to get my home built amp finished.