So I currently have a Helix A2 powering a set of AF GB60s. I love the look of the amp and it sounds fantastic although it is only playing midbass so it’s hard to truly judge. I just sold the Mosconi AS100.4 that was powering the GB10/25s. Now I’m trying to decide which route to go. I’ve been searching for a Helix A4 for some time now and only found 1 but the guy didn’t want to use PayPal so I’m unsure about it. My choices are to continue searching for a A4 or sell the A2 also and get the zapco amp. Does anyone have any comparisons between the two?