Ohm Setting on Amp Affect Tone?

[mikoo69]

I am interested in acquiring a Marshall JMP 50watt non master volume head from the 70s.

I own a 2x12 cabinet that is loaded with 2 8ohm speakers wired to a 4ohm load.

I know the JMPs have ohm selector switches between 4, 8 and 16 ohm. Is it preferable to run the head with any particular ohm setting? i could rewire the cab for 16 ohms if that would be a better sound. does ohm choice affect sound?

[guitarman_nebr]

when i switch the ohm selector on my Zinky Blue Velvet i notice a pretty big difference in tone from 16 to 8 to 4ohms. this amp was built so that you can switch around and find the sweet spot.

the 16 ohm has more bite and the highs are a little harsh. the 4 ohm setting has more bottom end and the overdrive is smoother. that is the case on my amp anyway.

i don't know that you will notice a big difference in your case. however, it is only a matter of swapping a couple of wires in the cab so try it out.