NSTALN
10+ year member
Dismember
The 7500 was the same design as the Thunder7000, Blue Thunder Extreme, Thunder8000, MXS, and first generation Xtant X series(slight variations in each but same motor/coil setup). All produced by Mytek. All were very good drivers. Not a ton of output...but low and clean. The only problem with all of these subs was lead-slap and if pushed too hard the leads would break off of the former at the solder joint. I've had the BT Extreme, 8000, and Xtant. Loved all of them.