100W Ultimate Fidelity Amplifier

[olafk]

And the Layout file

 

[Yuriy64]

How much power is the APEX NX12 amplifier with 60-0-60V power, and how much should I install BIAS in this amplifier?

 

[still4given]

I have built the preamp Apex A2 with NE5532. Sounds great, is easy to build and cheap. Super as a pre-amplifier for meters, small amps, test purposes ...
It may be that someone finds it useful.
Unfortunately, there are many different potentometers footprints and so I for myself had not the right one on the shelf. So be careful 😉

regards Olaf

Is this the non-inverting LinearPre?

 

[ivanlukic]

No, this is inverting Linear Pre and since it is inverting it sounds different than non-inverting. Warmer and softer, somewhat less detailed and bright than non-inverting. Many people find it more musical than non-inverting.

 

[still4given]

Strange. I built both and could hear no difference between them. The only difference is the direction in which the opamp is fed.

 

[ashok]

No, this is inverting Linear Pre and since it is inverting it sounds different than non-inverting. Warmer and softer, somewhat less detailed and bright than non-inverting. Many people find it more musical than non-inverting.

Are you sure ?
You can get an inverted signal just by reversing the speaker leads and that doesn't sound any different from the right way unless you use non musical test signals.

 

[alain98]

Hello olafk,
Is it possible to have PDF or your PCB?
Thank's

 

[alex mm]

PDF files

PDF files attached .....🙂

 

[olafk]

Oh, too late. Overslept on Sunday 🙂

Thanks, Alex.

 

[olafk]

Small changes to use other potentiometers.

 

[alain98]

Thank you Alex and Olafk, your are the Masters of PCB layouts!
Alain.

 

[Aatto]

986 pages 🙂 nice, can someone please PM me the latest layouts, it is almost impossible to search through all these pages, I spent an hour and every time i thought i found the final layout there's always another one in next page, lol.
I would appreciate it.

 

[olafk]

Look here: A Directory of Apex Audio Amplifiersand here:A Directory of Apex Audio Amplifiers - Chapter 2

But the real stuff you will only find in the thread. It's magic 😉

regards Olaf

 

[still4given]

For anyone interested, I created a layout using mostly SMD parts. It is single layer. I did inverting and non-inveritng.

 

[Rick G]

Terry,
Interesting. PDF's avail.?

 

[still4given]

Sure, do you need iron transfer or photo resist?

 

[Rick G]

Iron Please.

Thank You.

 

[still4given]

Here you go.

 

[Aatto]

Look here: A Directory of Apex Audio Amplifiersand here:A Directory of Apex Audio Amplifiers - Chapter 2

But the real stuff you will only find in the thread. It's magic 😉

regards Olaf

that actually helped a lot, thank you 🙂

 

[kandimba]

How much power is the APEX NX12 amplifier with 60-0-60V power, and how much should I install BIAS in this amplifier?

You should read the thread... You should read the M. Mile Post #9746