100W Ultimate Fidelity Amplifier

[Idefixes]

AX11/BG2_miniamp from borys

So i fire up AX11/BG2_miniamp today...Nice little board with good sound at all but not for hears...i explain : i has in my system a sound presentation that provide medium and upper frequency foward projection...and suited not to my hear, as i found some harshness and it produce hear tiredness....I has a good bass presentation...i try many bias level from 40 to 100mA and it's a little bette at this level but for me BG1_MJL as far my Nbip more accurate to my taste. Sound stage is better to as the sound can be pushed to high level with overall clean presentation. Monday i visit a friend. We will do listen session with our respectiv gears. I will relate you his comments on this amp.

Marc

 

[sonal kunal]

I am having DC offset of +60mV at output of AX-20. Which resistor should I look for variance in value? Can trimpot be implemented to correct DC offset.

 

[apexaudio]

So i fire up AX11/BG2_miniamp today...Nice little board with good sound at all but not for hears...i explain : i has in my system a sound presentation that provide medium and upper frequency foward projection...and suited not to my hear, as i found some harshness and it produce hear tiredness....I has a good bass presentation...i try many bias level from 40 to 100mA and it's a little bette at this level but for me BG1_MJL as far my Nbip more accurate to my taste. Sound stage is better to as the sound can be pushed to high level with overall clean presentation. Monday i visit a friend. We will do listen session with our respectiv gears. I will relate you his comments on this amp.

Marc

Nice work, what is speakers in your sound system?
Regards

 

[apexaudio]

I am having DC offset of +60mV at output of AX-20. Which resistor should I look for variance in value? Can trimpot be implemented to correct DC offset.

I suggest to meatchin input pair for better offset, +/-20mV is ok.

 

[Idefixes]

Nice work, what is speakers in your sound system?
Regards

PL14/XT25 combo : troelsgravesen VifaPL14WJ+XT25TG

Marc

 

[apexaudio]

PL14/XT25 combo : troelsgravesen VifaPL14WJ+XT25TG

Marc

Nice speakers, I want to try it in T Line or TQWT

 

[Idefixes]

Nice speakers, I want to try it in T Line or TQWT

I am not sure that the Tline will be important improvement...

Marc

 

[apexaudio]

I am not sure that the Tline will be important improvement...

Marc

I want bass under 50Hz

 

[emmi]

Hello Mile

Can I use this amplifier for project in my college
I want to know the specifications of this amplifier
could you please help me?

Thank you

 

[vdij]

Test amplifier AX14P. Very good amplifier, a beautiful sound. +-50V, Uout-28V, R-4 Ohm.

 

[apexaudio]

Test amplifier AX14P. Very good amplifier, a beautiful sound. +-50V, Uout-28V, R-4 Ohm.

Nice work.
Regards

 

[vdij]

thank you, apexaudio. Very good work at low frequencies. What are your THD? I have a THD 0.05% at 25 Watts.

 

[apexaudio]

thank you, apexaudio. Very good work at low frequencies. What are your THD? I have a THD 0.05% at 25 Watts.

This topology can have best THD 0,02%

 

[vdij]

THD 0,02%

Thank you, I will work.

 

[Riff]

Test amplifier AX14P. Very good amplifier, a beautiful sound. +-50V, Uout-28V, R-4 Ohm.

sir mile, can i add this protect for other amp and having vcc 130vdc ?
and any change value for this protect can work for 130vdc?

 

[apexaudio]

sir mile, can i add this protect for other amp and having vcc 130vdc ?
and any change value for this protect can work for 130vdc?

No, use protect with separate psu.

 

[vdij]

THD, frequency response, the circuit board in SL 5.

 

[apexaudio]

Quad Complementary Pair Transistor MPQ6700 can be used in AX17 input stage instead Q1,2,5,6.

 

[vdij]

Тhank you, apexaudio

 

[Gost22]

THD, frequency response, the circuit board in SL 5.

Many expressed the odd harmonics above the steam?! I do not think it should be😕🙄
cheers!