My new Eden Nemesis 410 has a parallel output. Now - my head is 320 watts at 4 ohms - the 410 is 4 ohms. So - does that mean I can't run another cab off the head because of the impedence - but I can run another cab off the 410's parallel output and not affect the impedence ?
The parallell output on you cab is exactly the same as the output(s) on your amp. That means of course you can't add a cab to your cab any more than you could to your head.