Changing impedance of 4x12 cabinet

cracka

New member
I'm using a Marshall AVT50 head with a Marshall MG412 cabinet, and I find the tone kind of distant and lacking presence. The gain appears to be lacking as well. While the cabinet is brand new, and probably would benefit from being broken in, I think I could improve the tone by somehow making an 8 ohm cabinet into a 4 ohm cabinet to match the output of the head. Is there a simple way of doing this? What is the quickest and most effective way of breaking in speakers while they're still in the cabinet?
 
Re: Changing impedance of 4x12 cabinet

You mean ? You're running a 4 ohms head into a 8 ohms cab ? Not good my friend, not good!
 
Re: Changing impedance of 4x12 cabinet

The AVT 50 will always sound distant, boxy, and lacking. It's just the nature of the beast.
 
Re: Changing impedance of 4x12 cabinet

You can't make an 8 ohm cabinet into a 4 ohm cabinet. An 8 ohm cab has four 8 ohm speakers wired in a series parallel combination. If you wire them all in parallel you'll have a 2 ohm cabinet. If you wire them all in series you'll have a 32 ohm cabinet. So 4 ohms is not a possibility. You're probably not hurting anything powering your 8 ohm cab with the 4 ohm output of your amp...but you probably are losing a little available power and getting a slightly grainier tone than you would be otherwise. Don't you have a 8 ohm output on that amp? Lew
 
Re: Changing impedance of 4x12 cabinet

Unfortunately there's no switch on the head for changing the impedance. I had the AVT50 combo and it didn't sound that bad at all. For some reason this one sounds like an MG head, VERY fake sounding gain, almost digital. I've heard other AVT50's and they didn't sound this bad.
 
Re: Changing impedance of 4x12 cabinet

actualy lew, you could wire 3 of them in series, and then parallel that with the left over 8 ohm, and get around 5 ohms or so.

jeremy
 
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