My memory is hazy, but... This is likely a 10-inch bass speaker from Eminence, presumably removed from an AMPEG SVT-210AV. The size is probably correct since the SVT-210 uses 10-inch speakers, but there's a possibility I'm mistaken. The impedance is written as 4Ω. I used it normally for only a month before removing it from the SVT-210, and I replaced and stored the unit a few years ago, so I think it should work, but please consider it as junk just in case. Due to shipping constraints, I'm listing it in separate auctions, but I have another one. Instant purchase is welcome.