High end amplifier- For 4-8 ohm

[jpk73]

Hey don't blame amps you never heard. That's just unfair.

 

[minek123]

If you want to build a high performance class AB amplifier please take a look a the wolverine.
It has outstanding distortion performance and is very well documented.

Is it well documented?
I wasn't aware you published final schematic to the public....

 

[cumbb]

The threadstarter wants to use a trafo for 40 V DC per rail.
If he wants to use the case of the Denon 495...-)

 

[adason]

No, but I am very sure that the sound will be exactly the same if not even better (less noise) if a normal-sized capacitor is used.
It's like putting a huge steering wheel from a big truck on your car and then pretending that your 150Hp car pulls like a 600Hp truck.
I started to feel sick from the fads and audiophile nonsense that I see on the net, including here on the forum.

You have not heard it. Have you seen the measurements?
I am feeling sick just by reading your nonsence.
You are in my ignore list now.

 

[Veysel]

What about Ska 150 amp? I have 6 empty pcbs. My friend told that it has some problems so i did jot build it but i am curious how it sounds. He says resistors at Vas gets very hot. He says he used 10k instead of 2 pcs of 4k7. I now looked at schematic and problem may be because of this.( power dissipation)

 

[Veysel]

He told he used 2w 10k resistor but it gets too hot and does not work

 

[cumbb]

?
https://www.avforums.co.za/threads/ska-150-watt-mosfet-amp-from-greg-ball.71576/

 

[Veysel]

Then I would replace the power transistors in the MT-200 packages with TO-247 or, even better, because more contoured and on point, TO-220.
No doubt: lm3875 and TDA2050 sound much better than complex discrete pp-designs - krell, accuphase, madrigal, cello... too!

I looked at chip schematics and they are also very complex inside the chip. So how can they sound nicer than complex discrete designs ?

 

[cumbb]

Shortest current paths, few circuit aberrations, smallest diameters, ONE resonant package...-)

 

[Veysel]

What is best chip for you? I am using ta2020 muse amp now and sound is nice on my 4 inch 4 ohm fullranges but i want to try a better one. I have a toroidal transformer too ( about 150va) and i will rewind it , i hope i can do well

 

[NanoFarad]

For easy build chipamp with minimal components UTC TDA2050L is a very good choice(less than USD$1 each) or you can try LM1875/1876.

 

[cumbb]

What is best chip for you? I am using ta2020 muse amp now and sound is nice on my 4 inch 4 ohm fullranges but i want to try a better one. I have a toroidal transformer too ( about 150va) and i will rewind it , i hope i can do well

Rewind or use as choke;-)

 

[Berlusconi]

It makes about +-41v

Indeed, some Chip Amps may be good options but your rails appear to be a bit too high. You may experience problems with heat transfer too. You may use this Chinese variant of The Blameless (see the image below). I have measured it and it appears to be fine for such power supply. It has low heat dissipation. Distortion is low and frequency response is fine. It is almost verbatim copy of The Blameless with all transistors still available from trustworthy suppliers, if you want to be sure everything is fine.
Good luck.

 

[Veysel]

Hi. I already bought these blameless clones and waiting seller to ship since Sunday. He marked as shipped today but no tracking info yet. I will make 2-3 amplifiers including Tda2050 utc ( i can supply it cheap here ) Lm3886 paralelled which i bought many years ago.And blameless amp. I found 2-3 more transformers. I should rewind toroidal one and I will make case for all.

 

[Veysel]

There is power supply connection at both left and right on lm3886x3 board. I checked and see they are paralelled so why they do it ? For connecting them to themself?

 

[NanoFarad]

Very good. Don't forget to post about your builds. Good luck

 

[stocktrader200]

Build an amp that has dual pnp npn input stages and opposing VAS stages. This gives the most open sounding amp I have heard.
Wolverine looks good , however it s based on the Badger which is a very similar design as the amp I replaced.

 

[ostripper]

Wolverine = $$$.
I have cheaper designs that are less $$. But just as multi decade stable as badger/wolverine designs.
A small Wolverine type design with even a single pair OPS would beat any OEM out there - easy.

 

[cumbb]

;-)
https://www.diyaudio.com/community/threads/modern-incarnations-of-hiraga-le-monstre.194917/

 

[ostripper]

Here is a nice simple one .... .01% 20Khz/8R . not bad for 1980 type designs.
A lot of english companies used this to power Hitachi lateral MOSFET output stages. Works swell with a standard EF2 !
The THD this does have is H2 dominant. Cute amp.