View Larger Image Matrix M-Stage HPA-1 with V5i Dual opamp No comments at present time. By Sales Burson|2020-10-08T15:34:42+11:00October 8th, 2020|V5i SS Opamp|Comments Off on Matrix M-Stage HPA-1 with V5i Dual opamp Share This Story, Choose Your Platform! FacebookTwitterRedditLinkedInTumblrPinterestVkEmail