DC offset protection in Pass Labs' amps?

[sianturi]

I'm building the aleph-x (15V grey's original circuit), and it looks like the dc offset problem will be a big PITA... especially for the loudspeaker.

Can anybody tell me if Pass Labs use DC offset protection circuit in their XA amps? It doesn't appear to be the case.

 

[Zen Mod]

no

plenty of tricks for you , in several Aleph X threads

 

[sianturi]

Ok thx for the confirmation! I guess macmillan resistors will be a life saver.

 

[koja]

btw I always thought Grey's early version has not quite dimensioned the PS right and the rails were too low. let me know once you are done if the amp performs well. i might have a spare transformer for the job. thanks.

 

[sianturi]

No problem koja. But i'm a slow starter... in fact i bought the pcb in 2002, and now i start building the psu (barely). 🙁 and i'm waiting for my heatsink to arrive.