View Larger Image AudioTrak Prodigy 7.1e X-fi DIY discrete opamps upgrade by Haido Very good musical improvement, even without complete burn in it sound better than my prev discrete opamp. Worthed for diy part upgrade =) Haido. By wpadmin|2017-03-27T11:52:33+11:00May 28th, 2012|V4 SS Opamp|Comments Off on AudioTrak Prodigy 7.1e X-fi DIY discrete opamps upgrade by Haido Share This Story, Choose Your Platform! FacebookTwitterRedditLinkedInTumblrPinterestVkEmail Related Posts JRC 4580DD with Burson V4 Opamp Gallery JRC 4580DD with Burson V4 Opamp DIY, monitor preamp with Burson V4 Opamp Gallery DIY, monitor preamp with Burson V4 Opamp Kenwood, KA-4006 with Burson V4 Opamp upgrade Gallery Kenwood, KA-4006 with Burson V4 Opamp upgrade Xiang Sheng DAC-01A upgrade with SS-Audio discrete Op-amps Gallery Xiang Sheng DAC-01A upgrade with SS-Audio discrete Op-amps GUSTARD H10 High-current Discrete Class-A Headphone Amplifier Op-Amp Mod Gallery GUSTARD H10 High-current Discrete Class-A Headphone Amplifier Op-Amp Mod