View Larger Image FX-Audio DAC-X3 with Burson V5i opamp upgrade I’ve noticed improvement in guitar tones – especially acoustic guitars. By Sales Burson|2020-10-08T15:30:19+11:00October 8th, 2020|V5i SS Opamp|Comments Off on FX-Audio DAC-X3 with Burson V5i opamp upgrade Share This Story, Choose Your Platform! FacebookTwitterRedditLinkedInTumblrPinterestVkEmail