100W Ultimate Fidelity Amplifier

[prasi]

If you ask Hugh Dean (AKSA), may be he change the design to have H2 distortion dominant or have monotonic harmonic profile.

Its AKSA virus (H2 Virus), I have contacted too.
A fatigue free, relaxing, weekend listening experience with a bit of alcohol.😀
Its 2.00 AM here. (I am listening to music as I type).

 

[klevismuka]

APEX B500 STEREO

Hi, Is this layout correct?

 

[stewin]

Hi, Is this layout correct?

hi klevis lovely layout 😎 . please post the pcb files of your layout.

 

[prasi]

hi klevis lovely layout 😎 . please post the pcb files of your layout.

stewin, go slow on diyaudio, build one properly and thoughtfully based on the experience of others and listen to your build, see if you like it. Then you can always build more in future.🙂

 

[bimo]

This is my simulation of FH12. Not tested.

PCB layout. Not tested.

 

[miro1360]

PCB layout. Not tested.

nice board 🙂

 

[apexaudio]

Audio 4ch Input Selector with Op amp & Relays - Based on Apex audio idea - YouTube

 

[gaborbela]

Audio 4ch Input Selector with Op amp & Relays - Based on Apex audio idea - YouTube

Would be interested to build that!
Thank you for posting it. 🙂

 

[xrk971]

That's very nice. I have those exact relays (bag of 8 for $5)🙂

 

[apexaudio]

Selector PCB

 

[apexaudio]

AX22

 

[Purrhula]

Mr. Apexaudio I started the etching of the A23 and A33 to mr alex mm (youtube) example. Now I have 3 questions I can use 1/4 resistors and what power can I use for these boards and are there pdf files on it This forum to be able to etch this too, I can not find them

Regards Purrhula

 

[Zinyx]

Selector PCB

I make copy PCB (SprintLayout 6) and added missing track to relay.

 

[riohardi0205]

I finished build apex A9 with irf540/9540 outputs. The sound is amazing, tight bass..exceptional imaging.
What is the resistance value on bias 10k VR to obtain proper bias?

 

[xrk971]

I make copy PCB (SprintLayout 6) and added missing track to relay.

Thank you, Zinyx. Could you please post Gerbers as well?

 

[stewin]

I make copy PCB (SprintLayout 6) and added missing track to relay.

thanks for sharing . good work😎

 

[apexaudio]

Mr. Apexaudio I started the etching of the A23 and A33 to mr alex mm (youtube) example. Now I have 3 questions I can use 1/4 resistors and what power can I use for these boards and are there pdf files on it This forum to be able to etch this too, I can not find them

Regards Purrhula

You can use 1/4W resistors and PSU10 for power
Regards

 

[miro1360]

Thank you. I have FH12 mod too 🙂
If I have time I will make some modification of other Apex's amplifier (in simulation). I hope Prasi will make the layout.

Hi Bimo, what about A33 cfa amp? in reducing transistors in less count? is that possible?

 

[student II]

Masters. I tried to modified bx 20 too bx 22, is it correct?

 

[Dacz]

nice pcb.. can you share sprint file?