Drop in replacement for NE5532?

[dreamth]

Or maybe you just don't like JohnPetrucci guitar play...I can understand that..
https://reverb.com/p/mesa-boogie-triaxis-programmable-pre-amp
" Powerful, big, full, great sound..."
Ha?What? On TL072? And 5 ecc83 followed by tl072 eq and tl072 line output buffers in a 3k $ rig? You must be kidding me right? Oh wait...maybe not? !

 

[dotneck335]

I think that Amek M-2500 microphone preamp is a prime example of a poorly-designed circuit. Putting a TL072 in the middle of a paralled-transistor plus NE5534 opamp is completely wrong.

 

[dreamth]

Even though the newer most aclaimed amek 9098 uses ne5532 instead of tl072 you can't just dismiss it because some famous artists used it and made it sell...
https://www.google.com/amp/s/www.so...ctic-monkeys-bet-you-look-good-dancefloor?amp

 

[ejp]

I don't see what a guitar application has to do with hifi.

 

[diyralf]

A lot of nonsense is done in the hi-fi sector. You can't ban people from doing that. Yes, the TL072 is sufficient for sound, but it is absolutely wrong for hi-fi.

 

[dreamth]

Having very strong convictions is not a sin either....

 

[dreamth]

I don't see what a guitar application has to do with hifi.

Apparently not as it seems Triaxis highest reproduced frequency is 4khz, but look at the slope of the final eq and imagine what those 5 ecc83 bring to tl072 input...I think I saw endless discussions on how a dac can stress the i/v stage input if there's not enough slew rate to deal with the incoming signal at the inverting input...Do you think 5 x ecc83 in drive mode are less potent than a dac?
Yet Amek 2500 was a professional recording console which is still sought for today for some reason...
I only reacted to people being so sure tl072 aren't good enough for audio equipment...Apparently they are found in very serious and expensive audio equipment of the past, a past when discrete Neve recording consoles were setting the pace.

 

[ejp]

Do you think 5 x ecc83 in drive mode are less potent than a dac?

I don't think anything. i just don't understand why a guitar application is considered evidence in a hifi discussion.

 

[dreamth]

I answered that.Look at the things I quoted previously.

 

[ejp]

I'm not going back over the whole thread but your contention doesn't make sense. Guitar signal chain elements are required to affect the sound. Otherwise why use them? This is not a hifi criterion.

 

[vacuphile]

This is complete nonsense when noise is the measurement in question. You think an audio console based on NE5532 will measure the same noise-wise if those chips are swapped out for TL072s?

At line level, very doubtful you will be able to measure any significant difference between the two opamps. Noise and distortion will be dominated by circuit layout and interference environment.