I have found an Orange 2*12 cab, however, it was custom ordered to be 4ohms.. So my question is, does that mean that a Rockerverb 50 head cannot be played through it, seimg that it has 8 or 16 ohms inputs..
Da-yam.. Where are all the nerd-burgers??
Outputs not inputs. You really shouldn't run a tube amp with a lower speaker impedance than it states on the amp's rear panel. However, if you're handy, you can change the impedance of your speaker cabinet to work with your amp! Chances are if you've got two speakers and the final impedance is 4 ohms, the speakers are 8 ohms each and are wired in parallel. By simply re-wiring them in series, you can get 16 Ohms which will be fine for your amp!
As the cab is now you wouldn't be able to use it with the rockerverb head. You might be able to rewire the speakers in the cab to make them work. You would need to know what ohm load one single speaker is rated for, and how the cab was wired. By changing how the cab is wired you may be able to get a different ohm rating. Heres an example. If the ohm load of each speaker is 8 ohms to get 4 ohms the manufacturer probably wire the speakers in parallel meaning the two negative terminals and wired together and then to the jack on the cab and the two positive terminals are wired together and then to the jack. When you wire speakers in parallel you divided the ohm load of each speaker in half. So you 8 ohm speakers now are rated for 4 ohms. If you wire the speakers in series, the positive terminal of one speaker connected to the negative terminal of the second speaker with the remaining positive terminal on one speaker and the negative terminal on the other speaker going to the output jack, then you double the ohm load of each speaker which would make your 8 ohm speakers now run at 16 ohms. Heres a link with info about wiring guitar cabs. the diagrams are about half-way down the page. This is something that you should be able to do yourself or that any decent shop could do for you.
Hope this helps.
Hope this helps.
Just rewire the speakers, its not hard.