Flubby low notes on a 1960A?

  • Thread starter Thread starter Scott Ians Beard
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Scott Ians Beard

Scott Ians Beard

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Fired up my 1980s 1960A/w GT-75s for the first time in about a year. Sounds great in the mid/high registers but some low notes sound a bit flubby/farty when pushed. Running a THD univalve at reasonable volume. The cab itself is in great condition. I took the back off and the speakers look like new! No tears, dents or anything. Cab back was tightly sealed, handles are secure too.

Is this normal for the 1960A with 75s? Could there be a problem?

Thanks!
 
My 1960a used to do this when hitting anything around an "A" note. Strangely it just kind of stopped one day. I have heard people mention that adding a small piece of foam between the back cover and the brace in the center of the cabinet should help. The back of the cabinet vibrates against the brace on certain frequencies causing it to sound farty.
 
May need to go thru it with a screwdriver and just tighen up everything. Did it to mine a couple weeks ago and was surprised how many were just a quarter turn loose...
 
i've got a 2000 a cab with 75's. i can't say that i've noticed that issue with my a cab or b cab.
 
I had original 75's in my '86 1960 and I had the same problem. I figured the speakers were old. Swapped them out and my cab doesn't fart anymore.
 
check the screws and make sure theyre all tight. speakers could be worn out...my 83 JCM800 cab doesnt sound farty at all. sounded like crap with the G12m70s, but the WGS Retro 30s and the G12T75s i put in there fixed that.
 
My guess is the centre post is not fitted properly against the back panel, or the speakers are the culprit. Either a wiring faux pas or blown.
 
Thanks to everyone for this info, I'm going to retighten all the screws, put some foam behind the centre post and report back tomorrow.
 
One thing I did on the 1960B cabs I had/have was take the back panel off and take out the screws that hold on the front panel, one at a time, put a small piece of a toothpick in the hole, and then put the screw back in. It made everything much tighter and it made it quit rattling. This was a few years back and it still sounds great.
 
UPDATE: I checked over the cab again and discovered that the centre brace had some travel in it – the screws were tight but it could wobble slightly. The brace must have come lose when I moved it. I tightened that up and put some foam on the brace for a better fit (thanks dogula!). Cranked up the amp again and no weird noises. I would never have guessed a lose brace would have caused that.

Thanks again to everyone :rock:
 
my 1960a was a little farty with the stock speakers as well (and that wasn't he cabs fault)
they are too bassy, in my opinion, and not much articulate on the lows
try g12h's if you want a similar amount of low end but keeping the articulation
 
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