SMD Distortion Detector DD-1 | AMPLIFIER TUNING TOOL

Takes the guess work out of gain matching

This thing works, what more can I say. My system has never sounded better. Easy to use.

Great product adjust those gains lika pro

This thing is AWESOME. Steve really knows his stuff it makes everything so much more simple for the average user. keep up the great work.

As always great product and great service.. it works perfect.. got all 3 amps set so I won't blow anything for now

It dont get any easier to set you gains. The price is worth every penny

Amazing setup tool. It’s almost as great as the D4S service. This tool will save you so much time. Worth every penny trust me. Unless you want to clip your amp do it right and get the DD-1.

Another great product from Down 4 Sound! Thanks guys fast shipping and exactly what I need thanks again!

Extremely satisfied with my dd1 purchase from Down4Sound , it really is as easy as it seems on all the videos on YouTube, just follow the manual and you’re set . No clipping means more life to your system . Shipping was INSANE ! Basically the Down4Sound standard. Received my order in about a day and a half , from Nevada to South Fl , the D4S team is something else .

Got this to set gain on 2 RF t0 12”. Very fast and accurate. Took like 3 minutes. Would definitely buy again and extras in the box was awesome ! Thanks D4S