THE GREAT 15“ sub CHALLENGE intro GIVEAWAY

A little test im gonna be doing with all these for myself, review, test Subs so far: T3 Audio T1000 Powerbass 3XL AQ SDC2.5 Obsidian OA15 Sundown SA15 Skar VVX AQ HDC3 DD 9515 Sundown Z3 Testing will be done 2 out SPL on than a daily listening review, and metering at 30-35hz.