Cabs + Mark IV combo (ohm question)

[Ednolb]

I've recently bought a Bogner cab which is an 8 ohm cab. Right now I hook this to my my Mark IVa combo using the 8 Ohm output of the Mark IV (this means my EV speaker is disconnected).

I was thinking of trying to hook up my EV speaker as well as I'm wondering what difference this would make. I know I can hook my cab and the EV speaker each to a 4 ohm output of the Mark IV.

However, I was wondering if I could also hook the EV speaker to the 8 ohm output of the Mark IV and the Bogner cab to a 4 ohm output? Or am I obligated to always use the 4 ohm outputs when using two speakers with the Mark IV?

 

[stokes]

Ideally the two speaker loads would be connected to the two 4ohm jacks,but you can connect them any way you want without doing any harm to the amp.There may be a little loss of power,and a slight tonal difference if you mismatch the connections as you describe,but you may not even notice it,or you may like it better,but it wont hurt anything.

 

[stokes]

Ideally the two speaker loads would be connected to the two 4ohm jacks,but you can connect them any way you want without doing any harm to the amp.There may be a little loss of power,and a slight tonal difference if you mismatch the connections as you describe,but you may not even notice it,or you may like it better,but it wont hurt anything.

 

[Lucifer]

I think you can use all 3 outputs of mark..

8 -> 8ohm speaker/box

4 -> 8ohm speaker/box
4 -> 8ohm speaker/box

If you DO mismatch, you should be careful not to put an 4ohm speaker to an 8ohm output or 2x4ohm (the outputs are wired parallel so that means 2ohms -> not good for your speakers or the transformer -> you can destroy it) speakers/boxes to 4ohm outputs..

Please correct me if i'm wrong..i havent tried this but my "knowledge" of electric circuits tells me, it can be done..