A new version of this has just been released. It uses a split rail power supply, surface mounted components but still has the NE5532 on a socket. Looks like a better option to this one. I will test and compare it soon as stock arrives.
Hi Marcel, good to see you here. I've never used the 4562. I will try it together with a number of similar chips that will just drop in. I doubt they will measure much difference but be interested to see if they have a 'sound' I'm still waiting for the 'new' version to turn up!
The best preamplifier ic that i have tested is. LT1057 opamp ic. It is the most expensive I have bought. I am looking for unchanget sound after the sound has good through the preamplifier.
I have never tested the LT1057 so cannot comment. As I cannot hear any sound deterioration with the NE5532 I personally cannot see any point in spending more for a (possibly) better IC if I cannot hear any difference. However your experience and opinion are always welcome.
Thank you for the video. I just got one, it is still 330pf in 2022. I guess it works OK for most people at this price but I will see what happens if I remove them. I find the sound rather flat with it. Will there be any problem if I don't replace them with a 33pf?
It may be OK but on one occasion, my latest project, it was prone to picking a strong radio station nearby. A 33pf cap will kill that issue completly. Watch my video on fake 5532. I bet you've got one.
Very interesting video! I am waiting for a bunch of amplifier components from Ali. I wish I had seen this video before I ordered them. Question: What sort of Tone Generator are you using?
When I made this video I used files downloaded from JOHN AUDIO TECH Channel. These days I use my Function generator as this is a little more comprehensive with wider frequency sweeps.
High frequency drop off is likely due to capacitance acting as a low pass filter, most likely the dipped ceramics that are across the input lines, C3, C4. UPDATE, I stand corrected, I wouldn't of suspected the feedback caps ! Nice catch.
I wonder how many hundreds have been sold like that, I listened to it, it really does sound very lacking in HF. After fixing I must say it's good as it should be. To quote Peter Walker of Quad.. Wire with gain!!
NE5532 is the weirdest op amp ever seen, it doesn't work if either IN- or IN+ grounded also the output doesn't go from 0 to VCC in comparator mode but from 2 volts to VCC Anyway it's built for audio circuits only
No, Peter, this pre amp is not suitable as an RIAA or pick up circuit. The RIAA curve is not just a simple HF cut. The circuit for the curve is quite complex and tends to use close tolerance components. The circuit would also need a 47K input impedance and a high sensitivity of around 2/3 mV. That circuit would then feed into a preamp like this one.
The 5532 /5534 are some of the worst sounding op-amps out there. They are used everywhere because of low cost, but they should have been taken out of service 20 years ago. Put in a 47920 it will sound way better.
I’d say they are used everywhere because they do the job required at low cost. They don’t sound bad at all, but that’s not to say there aren’t better sounding op amps.
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A new version of this has just been released. It uses a split rail power supply, surface mounted components but still has the NE5532 on a socket. Looks like a better option to this one. I will test and compare it soon as stock arrives.
Well done! Will remember this if I need a pre-amp. Kind of fond of the lm4562 opamp which would drop in. Currently still working on my DIY speakers.
Hi Marcel, good to see you here. I've never used the 4562. I will try it together with a number of similar chips that will just drop in. I doubt they will measure much difference but be interested to see if they have a 'sound' I'm still waiting for the 'new' version to turn up!
The best preamplifier ic that i have tested is.
LT1057 opamp ic. It is the most expensive I have bought. I am looking for unchanget sound after the sound has good through the preamplifier.
I have never tested the LT1057 so cannot comment. As I cannot hear any sound deterioration with the NE5532 I personally cannot see any point in spending more for a (possibly) better IC if I cannot hear any difference. However your experience and opinion are always welcome.
at aroud 3:20min on your video, I noticed the Pk-PK voltage indicated was around 70V. How is it possible when the supply is 0-20V?
From DC to AC signals
I tried the ne5532 of different brands and the sound changes a lot.
the best was an obsolete ceramic type.
the best sound with + 22-22 volts
which brands have you tested out, specifically to the ne5532?
Can you provide the complete circuit of that blue board?
Is this fitted with fake 5532? Of course, it is.
Thank you for the video. I just got one, it is still 330pf in 2022. I guess it works OK for most people at this price but I will see what happens if I remove them. I find the sound rather flat with it. Will there be any problem if I don't replace them with a 33pf?
It may be OK but on one occasion, my latest project, it was prone to picking a strong radio station nearby. A 33pf cap will kill that issue completly. Watch my video on fake 5532. I bet you've got one.
@@MichaelBeeny I don't have 33pf but have 22pf. Will that do? Kind of not worth the trouble ordering them just for a $3 preamp, lol.
@@KKMan20xx It's not that critical, just means the HF wont roll quite or early. MUCH better than 330pf that's for sure.
Very interesting video! I am waiting for a bunch of amplifier components from Ali. I wish I had seen this video before I ordered them. Question: What sort of Tone Generator are you using?
When I made this video I used files downloaded from JOHN AUDIO TECH Channel. These days I use my Function generator as this is a little more comprehensive with wider frequency sweeps.
Have need to change any resistor? And volt is 28v. Leave out 2 C.Thanks sir.
Can you give circuit diagram
High frequency drop off is likely due to capacitance acting as a low pass filter, most likely the dipped ceramics that are across the input lines, C3, C4. UPDATE, I stand corrected, I wouldn't of suspected the feedback caps ! Nice catch.
I wonder how many hundreds have been sold like that, I listened to it, it really does sound very lacking in HF. After fixing I must say it's good as it should be. To quote Peter Walker of Quad.. Wire with gain!!
Maybe it's a rebranded 741?
What a horrible thought Arthur!
I’ve seen this several times.
NE5532 is the weirdest op amp ever seen, it doesn't work if either IN- or IN+ grounded also the output doesn't go from 0 to VCC in comparator mode but from 2 volts to VCC
Anyway it's built for audio circuits only
AS you say it was built just for audio and in that mode it works very well. As old as it is!
you need +5v and -5v voltage both.
RIAA standards you will see why you can TH-cam record player RIAA EQ Decoding I think you will understand
Sorry Pete, I've only just woken up, it's early in the morning here in New Zealand, but sadly I don't understand what you are saying!
en.wikipedia.org/wiki/RIAA_equalization.
The link above we'll explain what was happening in this preamp and the high-frequency roll off
No, Peter, this pre amp is not suitable as an RIAA or pick up circuit. The RIAA curve is not just a simple HF cut. The circuit for the curve is quite complex and tends to use close tolerance components. The circuit would also need a 47K input impedance and a high sensitivity of around 2/3 mV. That circuit would then feed into a preamp like this one.
The 5532 /5534 are some of the worst sounding op-amps out there. They are used everywhere because of low cost, but they should have been taken out of service 20 years ago.
Put in a 47920 it will sound way better.
I’d say they are used everywhere because they do the job required at low cost. They don’t sound bad at all, but that’s not to say there aren’t better sounding op amps.