View Larger Image Sennheiser RS180, Shure SRH840, Shure SRH1840 with Burson Play and V6 Opamp upgrade Great sound. When replacing operational amplifiers, the sound became even better. Sales Burson2020-02-20T09:22:50+11:00 Share This Story, Choose Your Platform! FacebookXRedditLinkedInTumblrPinterestVkEmail