Wrong place for that discussion, I think. 😊www.diyaudio.com/community/threads/help-with-w-one-ladder-relay-attenuator-remote-control.427834/#post-8028818
Patrick
Patrick
I’ve got a pair of ACA monoblocks and in process of gathering all the parts for a My_Ref FE amp. I know the ACA’s need the preamp, but what’s the opinion on using the DCG3 with possibly a gain switch to use it for both? Would it be easy to put a pair of RCA outs for passive volume control of the My-Refs utilizing the volume control and iSelect in a DCG3 pre? Trying to think of the best way to do this so I don’t have to be swapping cables all the time if I want to switch amps. I’d originally thought of using a Mesmerize, but I’m not sure it’d work with the ACAs.
Hi, its possible to tap from the i-select for no gain outputs, but it would be preferable to also add a unity gain capable op-amp buffer stage in-between. To isolate the rest and potently drive the interconnects. A gain switch wired to the front panel is possible to pick up noise because in the feedback path. The DCG3 can't be set to less than 6dB gain anyway.
Thanks Salas. I’ll have to think on that. I really want to utilize the selector source options for both amps. I know I can direct in (no preamp) with the My_Ref, but I’d like the ability to switch sources. A single preamp/selector would be ideal, but maybe not the best option in the end in this situation. I’m not sure if 6dB gain will be too much for the My_Ref, although I might be able to adjust the input on the amps slightly to help with that situation. That’s one reason I thought a gain switch would possibly be useful. Still lots to learn.
If on the fly gain changing is not required, but to use different power amps between time periods, you could alternatively install female pins to can swap R6 resistor values for different gain setting.