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Analog Line Level Preamplifiers , Passive Pre-amps, Crossovers, etc.

Power supply and quiescent current
Power supply and quiescent current
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Old 8th November 2019, 10:27 PM   #11
Rolox is offline Rolox
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Join Date: Oct 2019
Quote:
Originally Posted by Mark Tillotson View Post
You mean apart from to your bank balance? Seems an illogical approach given the lack of data on most of these products and the fantastic performance levels achievable with much cheaper parts. That money is probably better spent on improving room acoustics and loudspeakers.
That's another debate I don't wish to get into - I've been using IC opamps countless times I just want to experiment discretes for once, plus they were cheap.
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Old 9th November 2019, 12:14 AM   #12
Mark Tillotson is offline Mark Tillotson
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Join Date: May 2018
Location: Cambridge UK
Ah, these chinese ones I guess - it would be good if you can document their performance relative to standard opamps - power consumption, noise (voltage and current and flicker), distortion at 2k and 600 ohms.
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Old 13th November 2019, 12:07 PM   #13
Rolox is offline Rolox
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Join Date: Oct 2019
I couldn't gather much.
The only available specs (at least on the sellers page, maybe it would be possible to contact the factory but, who is the factory? haha) are:

Ultra low distortion: 0.0008%
Low noise: 4nv√Hz
BJT-Input: 30pA
High speed: conversion rate -120V/us bandwidth -8MHz
High open loop gain: 120dB (600Ω)
Power supply range: 12V~18V (standard 18V)

and the fact that they are unity gain stable and protected against phase issues.

They do actually offer a quite extended range of discrete op-amps with gradually increased bandwidth and open loop gain, and proportionally increased price. I got the cheapest - risk is minimal and I thought it might be the easiest to use in a NE5532 circuit. They advertise this as being the ideal NE5532 replacement, wich probably means nothing anyways.
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