Hi Jwjarch,
Have you checked the Pass ACP+ thread - there is probably guidance there as to what can be subsituted. My guess is that it is not critical and the 80% is closer to 130% than 320%. I would go with 80%. Good to see you are building again.
I was just listening to my ACP+ last night and used it to listen to a MC phono preamp output stage. A fine sounding headphone amp. I even used a motorized volume pot.
Have you checked the Pass ACP+ thread - there is probably guidance there as to what can be subsituted. My guess is that it is not critical and the 80% is closer to 130% than 320%. I would go with 80%. Good to see you are building again.
I was just listening to my ACP+ last night and used it to listen to a MC phono preamp output stage. A fine sounding headphone amp. I even used a motorized volume pot.
Thanks for the suggestion X. The Pass PCB uses the good old 4N35, which has a CTR of 50%. 80% seems to be well within the ballpark.
Glad to see you still have the ACP+ in rotation. My Yarra will be exclusively a pre-amp. I just got a pair of Singing Bush mono-blocks up and running (Thanks to Zen Mod). So time to upgrade the old pre-amp. It's great to be building again.
Glad to see you still have the ACP+ in rotation. My Yarra will be exclusively a pre-amp. I just got a pair of Singing Bush mono-blocks up and running (Thanks to Zen Mod). So time to upgrade the old pre-amp. It's great to be building again.