100W Ultimate Fidelity Amplifier

[apexaudio]

@ John Bali

Thank you for your AX14-17 files,
Regards

 

[apexaudio]

@ John Bali

Thank you for your AX14-17 files,
Regards

 

[apexaudio]

AX12

AX12 made by 44250
APEX AX12 u 44250 izvedbi/done by 44250 - YouTube

 

[apexaudio]

AX12 in action
http://www.youtube.com/watch?v=4_ysfEhIWZs&feature=player_embedded

 

[sonal kunal]

Hi mile,
I'll like to know how much voltage i can increase when using IRFP260N(300W, 175C operating temperature) in NX-14.

 

[apexaudio]

Hi mile,
I'll like to know how much voltage i can increase when using IRFP260N(300W, 175C operating temperature) in NX-14.

Use +/-60V DC for NX14 with single pair of outputs.

 

[Crys Me]

Powerfull version made for test have only 1mV DC offset.

Can you share this schematic for my project Sir...

 

[apexaudio]

AX14 in action
apex ax14 power amplifier - YouTube

 

[apexaudio]

Can you share this schematic for my project Sir...

No it's not DIY project.
Regards

 

[apexaudio]

Another AX12 in action
Video220 - YouTube

 

[wattaniya]

Another AX12 in action
Video220 - YouTube

hi apex sir,
is this ax12 pcb shared?

 

[apexaudio]

hi apex sir,
is this ax12 pcb shared?

AX12 is in the posts: #135, #227, #230 and #233.

 

[wattaniya]

AX12 is in the posts: #135, #227, #230 and #233.

thanks sir for the reply,

 

[44250]

AX12

APEX AX12 u 44250 izvedbi/done by 44250 - YouTube http://www.youtube.com/watch?v=IWivDF-bQck
APEX AX12 u 44250 izvedbi/done by 44250 strano - YouTube http://www.youtube.com/watch?v=4_ysfEhIWZs
APEX AX12 u 44250 izvedbi/done by 44250 doma?e - YouTube http://www.youtube.com/watch?v=e0-X5zCdh-o

One more thing-i was listening this amplifier yesterday whole day,and in a few moments in a few songs i was pleasantly surprised how deep can it go! One thing is for sure-this amplifier that i have built deserves a proper transformer and more than 10 000uF per rail in PSU,to get it´s maximum performance although it sound good as it is. Cheap and very very good amplifier-I RECOMMEND IT!

(copy-paste from "150W MOSFET Amplifier with IRFP250x2" page 13,posts #121,#122,#123,#125,#126,#127,suggested by APEX)

 

[apexaudio]

APEX preamp with electonic input selector from '80, if I only have time to remake , but without 'tape-monitor'

 

[marus]

In schematics AX17 ...
Why use such a powerful transistor for Q9/Q10 like MJE340 ?
Collector current of Q9 is about 4mA and the dissipation is ~ 0,3W.
Can I use 2SC2705 (150V, 50mA, 800mW) instead ? Is special for audio VAS stages.

 

[apexaudio]

In schematics AX17 ...
Why use such a powerful transistor for Q9/Q10 like MJE340 ?
Collector current of Q9 is about 4mA and the dissipation is ~ 0,3W.
Can I use 2SC2705 (150V, 50mA, 800mW) instead ? Is special for audio VAS stages.

Many transistors can be use for VAS, MJE340/350 is just easy available parts.

 

[marus]

AX17

I simulated the AX17 schematics in Orcad Pspice and the bandwidth looks like this.
What's wrong ? Has someone real measurements on this ?

 

[apexaudio]

I simulated the AX17 schematics in Orcad Pspice and the bandwidth looks like this.
What's wrong ? Has someone real measurements on this ?

Replace C6 100uF with 1000uf

 

[jamesjbrookes]

AX12 and A100

AX12 is in the posts: #135, #227, #230 and #233.

Hi Mile, the AX12 seems similar to another one of your many designs (you are most generous). Does your A100 use the same circuit but different PCB layout? Many thanks, James