How do I make my JCM900 1960B 412 cab Thump!

[jchrisf]

It can't seem to get the bass from my rocktron prophesy like I want. Is there anything I can do to make this cab more bassy?

 

[mjtripper]

You can try adding some acoustic batting to the rear panel.

 

[Moshaholic]

I always got my thump from the power amp I was using with my rack gear... like the depth knobs on my VHT or deep mode on my mesa 2/90/2...

 

[jchrisf]

I can eq my power amp and prophesy but the speakers (G12T-75) don't seem to be able to punch me in the chest like my friends cab. I've tried batting and it improved a little but not enough. I wonder if I need to sell the cab or get different speakers?

 

[mjtripper]

What power amp are you using?

 

[RJF]

Front load cabs are usually better at that.

 

[fuzzyguitars]

eq in the loop

 

[Mesa\Kramer]

eq in the loop

THis

 

[paulyc]

Celestions will only take so much low end via eq before they flap like flags in the wind. EVM 12 Ls may be your ultimate solution, and in a front loaded cab to boot.

 

[jchrisf]

Thanks... I believe I'll work on getting a different cab.

 

[rupe]

Thanks... I believe I'll work on getting a different cab.

So you're given several good tips, and your takeaway is to get a new cab? Brilliant!

 

[maddnotez]

I can not seem to find it now but there is a cool video on you tube for some cheap basic upgrades.

Using a caulk gun to all the edges of the inside of the cab and some kind of centering of the big wooden beam to the back of the cab. I think there was something else he did to but again I can not seem to find the video, sorry.

 

[GuitarGuyLP]

Don't use regular caulk as it dries the fumes it releases eat some of the glues in the speakers (at least that is what I have heard)

I am kind of surprised that this was not mentioned, but what are your EQ settings? If you have too much bass, but not enough mids that is what I personally find will give you a lack of thump. Low mids are where it is at for thump