OP-amp replacement...

Lyra · 19th April 2006, 12:34 PM

I've got an (car)amp and this are using the "old" HA4741 op-amp in the input/ filter stage.
The sound from this amp is so and so...

Considering the "741-family" not very good for audio-use, I want to replace theese op-amps...

I was thinking about MC33079. I can get theese from SGS-Thomson, and ON-semi, would the manufacturer have an inpact on the sound ?

Is there any other Quad op-amp's available that would be better than the MC33079 ??

Lyra

Leolabs · 19th April 2006, 02:51 PM

If you are looking for a cheap and cheerful quad opamp,consider about TLO74

Upupa Epops · 19th April 2006, 02:55 PM

Look at OPA 4134...

Ryssen · 19th April 2006, 04:28 PM

Quote:

Look at OPA 4134...

I agree...

jaycee · 19th April 2006, 11:57 PM

Bear in mind if it's using a quad 741, sticking a fast opamp like the OPA4134 in there could be asking for trouble...

I'd stick with the TL074

davidsrsb · 20th April 2006, 04:52 AM

The HA4741 is a 3.5MHz chip with 1.6V/us slew so its no quad 741.

The TL074 would not really be an improvement

djk · 20th April 2006, 09:52 AM

I've replaced the 4741s with the TL074s, they do sound cleaner, but a bit thin on the low end.

"Look at OPA 4134..."

No longer available in a DIP.

National Semiconductor equivalent of a quad 5532 in 14 pin DIP (LM837), in stock at DigiKey.

http://www.digikey.com/scripts/DkSea...409477&Site=US

19th April 2006, 12:34 PM	#1
Lyra diyAudio Member Join Date: Nov 2003 Location: Norway	OP-amp replacement... I've got an (car)amp and this are using the "old" HA4741 op-amp in the input/ filter stage. The sound from this amp is so and so... Considering the "741-family" not very good for audio-use, I want to replace theese op-amps... I was thinking about MC33079. I can get theese from SGS-Thomson, and ON-semi, would the manufacturer have an inpact on the sound ? Is there any other Quad op-amp's available that would be better than the MC33079 ?? Lyra

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19th April 2006, 02:51 PM	#2
Leolabs diyAudio Member Join Date: Dec 2004 Location: Bukit Mertajam	If you are looking for a cheap and cheerful quad opamp,consider about TLO74

19th April 2006, 02:55 PM	#3
Upupa Epops diyAudio Member Join Date: Aug 2003 Location: Prague,Czech Republic	Look at OPA 4134...

19th April 2006, 11:57 PM	#5
jaycee diyAudio Member Join Date: Apr 2004 Location: Norwich, UK	Bear in mind if it's using a quad 741, sticking a fast opamp like the OPA4134 in there could be asking for trouble... I'd stick with the TL074

20th April 2006, 04:52 AM	#6
davidsrsb diyAudio Member Join Date: Dec 2005 Location: Kuala Lumpur	The HA4741 is a 3.5MHz chip with 1.6V/us slew so its no quad 741. The TL074 would not really be an improvement

20th April 2006, 09:52 AM	#7
djk diyAudio Member Join Date: Feb 2001 Location: USA	I've replaced the 4741s with the TL074s, they do sound cleaner, but a bit thin on the low end. "Look at OPA 4134..." No longer available in a DIP. National Semiconductor equivalent of a quad 5532 in 14 pin DIP (LM837), in stock at DigiKey. http://www.digikey.com/scripts/DkSea...409477&Site=US