Why does my 4x12 Marshall sound like ass?

[artiewylde]

I have a JCM800 4x12 slant cab. I loaded it with a quad of G12K85s. Killer speakers. But the cab sounded like shit. No punch to it at all. I thought maybe my memory of those speakers ins't that good. So I loaded a pair of Vintage 30s along with Greenbacks in an X pattern. All UK speakers. Good stuff right? Re-wired with premium wire.
Well the cab still sounds shitty. What gives? Do I just not like 4x12s? Is it a phasing issue?

Wiring, baffle,the room, so many variables

 

[homespun]

My guess is the speakers are wired wrong, something is out of phase. When that happens the cab sounds thin, with little bass, lots of treble and a whole bunch of A$$ tone.

That was my thought as well. If it’s out of phase there will also be a “Dead spot” when you move your head from one side of the cabinet to the other. As if it sounds louder off to the sides and lower in the middle .

 

[JackBootedThug]

This....check ALL the screws inside the cab; you'd be surprised how many may be really loose.

this x10....

 

[mooncobra]

What amp are you using?