SYMEF amplifier

[tinitus]

Originally Posted by OnAudio

Hi Titinus,

I did checkout a few devices but these ones showed a superior performance

best sound is priority ofcourse
whatever gives the result
and they look better too
only moderate classAB
no problem

some say metal house small signal devices sound better too
others will probably say its a rubbish myth

did you do the checkout by building/listening, simulation, or specsheet ?

just curious

[drowranger]

Originally Posted by OnAudio

Volunteer needed to do the pcb.

i have used different casing for the output transistor.goodluck to your amp.

cheers,
joel

[AndrewT]

Originally Posted by tinitus

.........
but they will need 90degr angled alu profile

which will never be a smooth fit to heatsink
heat transfer will be compromised

the two outside faces of metal angles are generally pretty near flat.
If there is excessive bowing then being the outside faces access to modify machine them is easy.

[OnAudio]

Originally Posted by drowranger

i have used different casing for the output transistor.goodluck to your amp.

cheers,
joel

Thanks for the PCB Joel,
You v done the Bias and the output network slightly differently.

I do hope you enjoy what you hear. Keep thread up to date with your progress. I am targeting at-least 30k builders. Then we will go world wide

[OnAudio]

Originally Posted by tinitus

did you do the checkout by building/listening, simulation, or specsheet ?

just curious

I am using a formula that will be published soon. This formula has a very high level of accuracy. That is why I am giving these schematics to the diyaudio community as references to good sound. If the formula is wrong well I will have feedback from the diyaudio community, then we can use the feedback to improve the product. I am hoping to demo the products at at-least one of next years audio events.

[tinitus]

Originally Posted by OnAudio

I am using a formula that will be published soon.

ah, the secret formula

yeah, we have the needed skilled builders and designers to build very good amps

I'm sure the formula will work very well here

[Nico Ras]

I am sure that you can be less vague and give some objective away with regard to the formula. I think throwing you overboard may be necessary after all. OR you can share my ugly women in the dark. Now which would it be?

[OnAudio]

Originally Posted by tinitus

ah, the secret formula

yeah, we have the needed skilled builders and designers to build very good amps

I'm sure the formula will work very well here

[OnAudio]

Originally Posted by Nico Ras

I am sure that you can be less vague and give some objective away with regard to the formula. I think throwing you overboard may be necessary after all. OR you can share my ugly women in the dark. Now which would it be?

He he he he....outbid the publisher

[OnAudio]

Originally Posted by OnAudio

I have skimmed again through Sloan pages 41 to 42, Burning amplifier, Cordell pages 9,10 and 117-210, Self Chapter 8 and I am still not sure whether a resistive load is not enough.

I agree we need a reserve of 3times the current for the speaker in relation to a resistor of the same impedance for some program material. With this in mind then, the amplifier is better suited for 100Watts 4 Ohms.