2stageEF high performance class AB power amp / 200W8R / 400W4R

[HRDSTL]

Finally finished a proper piece of amplifier, reference product from ASTX -- SA2014. On the bottom of the chassis 2 massive audio toroids 600VA, above each extreme filtration 80.000uF per channel. The amplifier also has a proper 400W/4Ohm and 200/8Ohm output. Grounding I did through two diode bridges. No hum or noise. Now I just need to save up for a big tower speaker Jenzen Illuminator. Sound Good 🙂

Source: PC/Tidal
DAC: SMSL MDA RAW 1
PREAMP: SMSL H400

 

[thimios]

Very good job 👍
Congratulations.
What is the d.c protection circuit that is used?

 

[HRDSTL]

Protection suggested to me as per the requirement of @prasi . It is a proven SSR3 scheme.

 

[bullittstang]

Georgeous build - great job!

Can you link to the SSR - I have Prasi's prior design I think, but was originally designed for a LM3886 and ~35-40V, not nearly robust enouhg for this beast of an amplifier

 

[astx]

HRDSTL: Congratulations for your successful build of this "beast"!


Have fun, Toni