Hey,
I am trying to make a volume control system for a 70V PA system. Something that is able to split one amplified audio channel (100W-200W) into 16 audio channels (0-40W each)
I have been looking around and frankly, I can't seem to find an ideal way to do this. I did ask this question some time ago but all that was suggested was to use an Autotransformer. This method would work very well if I could manually turn the knob but I need something that can be adjusted digitally.
I have been experimenting with some high power resistors and relays to mimic a linear db reduction but that requires a lot of expensive parts (unless you don't need the 40W resistors to deal with the power transmission on 70V audio?) Plus, no one keeps the kind of stock I would need for these and manufacturers have huge wait times for them.
Does anyone have an idea that can help me out with this? Are PCB mountable (and small) autotransformers with multiple tap levels available? Do I really need 40W resistors to handle the Audio signals? Is there some other off the shelf product that can do this for me?
I am trying to make a volume control system for a 70V PA system. Something that is able to split one amplified audio channel (100W-200W) into 16 audio channels (0-40W each)
I have been looking around and frankly, I can't seem to find an ideal way to do this. I did ask this question some time ago but all that was suggested was to use an Autotransformer. This method would work very well if I could manually turn the knob but I need something that can be adjusted digitally.
I have been experimenting with some high power resistors and relays to mimic a linear db reduction but that requires a lot of expensive parts (unless you don't need the 40W resistors to deal with the power transmission on 70V audio?) Plus, no one keeps the kind of stock I would need for these and manufacturers have huge wait times for them.
Does anyone have an idea that can help me out with this? Are PCB mountable (and small) autotransformers with multiple tap levels available? Do I really need 40W resistors to handle the Audio signals? Is there some other off the shelf product that can do this for me?