12aX7's vs. 12AT7's.
- Thread starter wasteofo2
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Duke of Metal
New member
Re: 12aX7's vs. 12AT7's.
12at7s are gonna sound smoother, sweeter and less gainy ofcourse.. 12ax7s arent the opposite of it but will have more gain and have more attack to them.
I guess thats the basic of them.
good luck,
Duke
Well.. out of a scale of 100%, the 12at7 provite about 60-75% of the gain found in 12ax7s.wasteofo2 said:
12at7s are gonna sound smoother, sweeter and less gainy ofcourse.. 12ax7s arent the opposite of it but will have more gain and have more attack to them.
I guess thats the basic of them.
good luck,
Duke
L
Lewguitar
Guest
Re: 12aX7's vs. 12AT7's.
I believe the 12at7 has about 60 or 70% of the gain of a 12ax7.
They are interchangable, but the 12ax7 will produce a much hotter signal...
I sometimes substitute a 12ax7 for the phase invertor tube in a blackface Fender...it pushes the amp harder. But the stock 12at7 sounds cleaner and best in that position for most music.
I believe the 12at7 has about 60 or 70% of the gain of a 12ax7.
They are interchangable, but the 12ax7 will produce a much hotter signal...
I sometimes substitute a 12ax7 for the phase invertor tube in a blackface Fender...it pushes the amp harder. But the stock 12at7 sounds cleaner and best in that position for most music.
NoMoreMKIV
New member
Re: 12aX7's vs. 12AT7's.
i remember reading somewhere that the 12at7 has a higher current handling capacity, and that's why it's good for reverb drivers and phase inverters.
i remember reading somewhere that the 12at7 has a higher current handling capacity, and that's why it's good for reverb drivers and phase inverters.
Duke of Metal
New member
Re: 12aX7's vs. 12AT7's.
How would you compare an amp (the same one), but 1 has 12ax7s in the Phase Invertors and 1 has 12at7s in the phase invertors??
This would be for highgain situation.
thanks,
Duke
hey Lew,Lewguitar said:
How would you compare an amp (the same one), but 1 has 12ax7s in the Phase Invertors and 1 has 12at7s in the phase invertors??
This would be for highgain situation.
thanks,
Duke
OUTLAW1969
New member
Re: 12aX7's vs. 12AT7's.
DITTO.
NoMoreMKIV said:
DITTO.
italic zero
New member
Re: 12aX7's vs. 12AT7's.
That girl in your avatar looks like a candy corn.
That girl in your avatar looks like a candy corn.
Re: 12aX7's vs. 12AT7's.
Like The only differences are gain, the headroom is an issue of the amp.
12AX7, 12AT7, 12AU7,12AY7, and another I forget are all interchangeable, the only difference is gain, AX is the hottest, I think I have the gain order correct. I'd have to look that up, but any tube amp site should have it listed.
The difference tonally has to do with how the amp interacts with it, as the compression points are a bit different, but I couldn't tell you more specifically than that though. Also the 12 series the heaters can run off 12.6v or 6.3v, but most amps run them at 6.3v so they last longer. There are also some other odd balls that can be plugged in there as well, but you'd have to look that up on a tube site.
Like The only differences are gain, the headroom is an issue of the amp.
12AX7, 12AT7, 12AU7,12AY7, and another I forget are all interchangeable, the only difference is gain, AX is the hottest, I think I have the gain order correct. I'd have to look that up, but any tube amp site should have it listed.
The difference tonally has to do with how the amp interacts with it, as the compression points are a bit different, but I couldn't tell you more specifically than that though. Also the 12 series the heaters can run off 12.6v or 6.3v, but most amps run them at 6.3v so they last longer. There are also some other odd balls that can be plugged in there as well, but you'd have to look that up on a tube site.
L
Lewguitar
Guest
Re: 12aX7's vs. 12AT7's.
For the Duke of Metal,
Most Marshalls use the 12ax7 for the phase invertor...it's part of the reason Marshalls have a more aggressive "rock" tone than blackface Fenders. Most blackface and silverface Fender use the 12at7.
(That's the tube right next to the output tubes...usually)
I've played around with using a 12ax7 vs a 12at7 (and also a 5751) in old Marshalls, JCM 800 Marshalls, and my blackface Fenders.
Basically, in a blackface Fender, you get a cleaner, less grainy tone with the 12at7...and a slightly hotter, rougher, grainier, more easily overdriven tone with a 12ax7.
For the Duke of Metal,
Most Marshalls use the 12ax7 for the phase invertor...it's part of the reason Marshalls have a more aggressive "rock" tone than blackface Fenders. Most blackface and silverface Fender use the 12at7.
(That's the tube right next to the output tubes...usually)
I've played around with using a 12ax7 vs a 12at7 (and also a 5751) in old Marshalls, JCM 800 Marshalls, and my blackface Fenders.
Basically, in a blackface Fender, you get a cleaner, less grainy tone with the 12at7...and a slightly hotter, rougher, grainier, more easily overdriven tone with a 12ax7.
