#1
I have just got a cab for my Laney LC15r to make it sound better, and the cab is 8 ohms and says on the back that the maximum it can take it 80w RMS. My question is, can the cab handle a 50w valve head that i might get in the future? 50w valve amps are only 50w when clean, so i was wondering if it would blow when cranked?

I should add that the 50w valve amp would only be cranked through an attenuator, and played at the level of a cranked 15w valve amp, so would it be able to handle this? At the same time, using the same principle of cranking it through an attenuator and attenuating it quite a lot, would i be able to use a 100w head? or does it not work like that?

No amp I use will be cranked without an attenuator, and it would never be cranked more than is needed to play a pub, so would i be able to use any amp at 8 ohms through the cab? or does the wattage rating of the amp have to under the cabs rating regardless? thanks
#2
The 50w would work easy.

The 100w would work through an attenuator, but I wouldn't turn it up too much as you'll get speaker dirt.
The Laney Thread are big and clever. No exceptions.