100W Ultimate Fidelity Amplifier

[sajti]

CFA with diamond input buffer must be similar.
Regards

It was not offense. I like this topolgy too. And the DC servo You applied in the AX33/40 was really good idea.
I did lot of research regarding this topology, even hybrid version, with tube based voltage amplifier, and ss power buffer...

Sajti

 

[sajti]

If amp no need gain only buffer can be use.

That can be good idea. And if You use low impedance source (CD player, or same), you can put the volume control 1st, followed by the unity gain buffer. That is nice combination!

Sajti

 

[apexaudio]

PSU for preamps

 

[apexaudio]

It sounds great, if You use carefully selected parts. If not, only one OPA2134 will easily outperform it...

Sajti

OP for preamp is not fun

 

[sajti]

OP for preamp is not fun

I agree with You. I don't like to use opamps. But I discussed about the sound quality, not the fun. It's very disappointing, if You build a very complicated amplifier, with bad sound quality, because of the bad parts You used...

Sajti

 

[noobie]

Simple stereo protect + PCB

any info what this about this protection circuit?

ex. overcurrent, dc protect, short circuit etc?....

 

[Karl vd Berg]

I like the idea of a full P30 with own power supply and everything, etc.

Implementation of a multiple Line Inputs (with 2, 3 or more connections) with selector is also possible?

Thanks.

 

[lyubcho88]

Hi everyone.

Here is my latest DIY audio amplifier with APEX - AX11 circuit.
I call it BG2 miniamp v3
BG2 miniamp v3 - 2x150W/4Ohm | DIY Projects

 

[44250]

it just can not be much,maybe any better than this-great job!

 

[borys]

lyubcho88

AWESOME encolusre !!
Super nice job!!

 

[apexaudio]

any info what this about this protection circuit?

ex. overcurrent, dc protect, short circuit etc?....

DC and delay start...

 

[apexaudio]

I like the idea of a full P30 with own power supply and everything, etc.

Implementation of a multiple Line Inputs (with 2, 3 or more connections) with selector is also possible?

Thanks.

Input selector can be add,
Regards

 

[apexaudio]

Hi everyone.

Here is my latest DIY audio amplifier with APEX - AX11 circuit.
I call it BG2 miniamp v3
BG2 miniamp v3 - 2x150W/4Ohm | DIY Projects

Nice work,
Regards

 

[apexaudio]

OP preamp

 

[Vostro]

Mile do you have a stereo preamp with tone control and volume on PCB ?

Regards

 

[thimios]

Mile do you have a stereo preamp with tone control and volume on PCB ?

Regards

Not based on an i.c but on separate parts(hi-fi)

 

[suryadi5417]

Is this ok ?

 

[apexaudio]

Is this ok ?

Nice work,
Regards

 

[wendipassundan]

ax14

Is this ok ?

how about sound??

 

[suryadi5417]

how about sound??

NEVER ask about sound quality fron Apex it's BEST for diyer's