The ULD 15's were state-of-the art back in the late 80'.
If you are into musical subs, this is one. Made for playing music, not for home theater (since there was no home theater).
The 70 lb solid oak sub unit is powered by a 400 watt outboard amp.
Both amp and driver work perfectly, although they show there age (just some surface nicks).
Drivers are perfect and have never been refoamed.
This sub can produce sub-bass below 20hz, and up to 100hz...with tone.
I have two to sell, one black and one natural.
Will not ship. Must be picked up.
No Paypal at stated price. (These are obviously not full-range speakers, but A'gon makes you pick something or else you cannot complete the listing.)