http://www.oaudio.com/300W_SUBAMP.html Bought a 300W model for $139.00 and you can get 5 for $100 ea. Check it out. (I hope this is the right place for this posting.)
good stuff, i was looking at some once when building my first open baffles but didnt find any at decent prices. Let us know what you think when you use it.
They are in my present speakers Vaughn Cabernets and they work perfectly but they are not 230v. The new ones are switchable. They also have 500w amps. at a good price.