the problem is definately the speaker. checked the voltages at the amp output and it was ok. removed the speaker, connection was good. gave the speaker a good prod from the inside and it burst into life for all of 2 seconds.
probably a connection inside the speaker (voice coil?) is dodgy. reckon it might have been hammered by a previous owner?
i don't know what would be easiest for you, a replacement speaker that i fit myself, a replacement enclosure that you can test before sending (if you have one that really hasn't been used before that'd be best as the ad stated it was brand new but the screwholes and strap marks suggest otherwise), or a straight refund and i put money towards that to buy one brand new from halfords or somewhere?
both amps seem to be working fine by the way, if you'd like to arrange pickup of one of them that'll be no problem
and of course i can send the entire thing back if you'd prefer a simple refund.
thanks for all the time you've spent helping me out with this, i really appreciate it! hope to hear back from you soon,
cheers