View Larger Image Rotel RDG1520 DIY discrete opamp upgrade by Arthur. It took a while but I had the discrete Op-amp built in my Rotel RDG 1520. I use it for streaming, internet radio and also as a DAC for my CD player. They sound wonderful. Much more timbre. Arthur. By wpadmin|2017-03-27T11:52:28+11:00October 3rd, 2013|V4 SS Opamp|Comments Off on Rotel RDG1520 DIY discrete opamp upgrade by Arthur. 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