TL 072 replacement for MM 100b

voxac30 · 26th January 2008, 11:06 PM

I rebuild my 23years old MM 100b bass amp -hybrid preamp
ic and poweramp tubes (6l6GC ) . I would like to know
to replace ic TL072 with another ic with less noise and more
dynamic for better sound . Thanks for help !

Chucko · 27th January 2008, 03:02 AM

The TI OPA2134 is a good choice. But it takes more than twice the current of the TL072, so be sure the power supply is up to it.

Nigel Goodwin · 27th January 2008, 11:50 AM

The TL072 is a great opamp, I wouldn't have thought replacing it will make any difference whatsoever? - it's probably already by far the highest quality part of your amplifier.

Brett · 27th January 2008, 05:54 PM

Quote:

Originally posted by Nigel Goodwin
The TL072 is a great opamp

I could not agree less.

tINY · 8th February 2008, 07:10 AM

The TL072 is fine for bass amps. Lowering the noise is a little harder than just replacing an op-amp.

But, if you think it will help, you could try an AD823. Make sure the supply is adequate (as it draws more quiesent current) and be prepared to alter the feedback a bit as it has almost 2x the slew rate as the 072.

-tINY

26th January 2008, 11:06 PM	#1
voxac30 diyAudio Member Join Date: Jul 2007	TL 072 replacement for MM 100b I rebuild my 23years old MM 100b bass amp -hybrid preamp ic and poweramp tubes (6l6GC ) . I would like to know to replace ic TL072 with another ic with less noise and more dynamic for better sound . Thanks for help ! __________________ yeti

27th January 2008, 11:50 AM	#3
Nigel Goodwin diyAudio Member Join Date: Jul 2005 Location: North Derbyshire	The TL072 is a great opamp, I wouldn't have thought replacing it will make any difference whatsoever? - it's probably already by far the highest quality part of your amplifier. __________________ Nigel Goodwin

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27th January 2008, 03:02 AM	#2
Chucko diyAudio Member Join Date: Jan 2002 Location: Silicon Valley, CA, USA	The TI OPA2134 is a good choice. But it takes more than twice the current of the TL072, so be sure the power supply is up to it.

8th February 2008, 07:10 AM	#5
tINY diyAudio Member Join Date: Jun 2007	The TL072 is fine for bass amps. Lowering the noise is a little harder than just replacing an op-amp. But, if you think it will help, you could try an AD823. Make sure the supply is adequate (as it draws more quiesent current) and be prepared to alter the feedback a bit as it has almost 2x the slew rate as the 072. -tINY

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