The Dawn System ? I owned this system looooong time ago and I agree with UD.

What I did before selling it :
I copied the subwoofer cabinet (folded horn)but multiplied all dimensions with 1.8
Put a 18" dual coil speaker in it and WOW ! What an incredible sound with only an aged (25 years) Yamaha 100W amplifier and home made sublow-filter.
I still use it.... and love it !

Roel