[G LeeParticipant]

.68uF to 1uF is commonnly used. Really dependent on the input impedance. You want the RC time constant below the frequencies being passed. Wasn’t really thinking other than to use a cap to block the DC.

[G LeeParticipant]

Schematic wise 48V goes to + and – legs through two pull up resistors. This is on each channel individually so 48V is not directly connected at each mic in but through these resistors. connecting two ins would parellel those thus decreasing the values in half. As i stated it should be ok but you would be permitting double the current to be able to be drawn from the mic. The block diagarm for the desk actually shows them if ya need a visual. I’ll wait for someone else to do with a direct Y cable. For now I’ll just make one cable up with caps to test.

G

[G LeeParticipant]

Gave the Y cable some thought to get 48V to fake a mono channel to stereo… It should work but once you think about the two pull up resistors to get 48V to the mic, You would be putting them in parallel thus decreasing the impedance in half possibly applying too much current to the mic??? may or may not damage the mic but will def cause impedance issues with the 48V supply. What separates the 48V DC to the first gain stage is some small caps like .1 to do DC filtering.

FIX: take you standard XLR Y cable and add two .1 caps to the + and – pins 2 and 3 in series (inline) to one of the splits going to the stage box. This will prevent the two 48V DC from being connected. Since 48V will be applied to both ins- ch 17 and 18 it wouldnt matter which XLR end with the dc blocking caps gets plugged in to 17 or 18.

[G LeeParticipant]

I thought the source and output are all configurable with either of the AR stage boxes. Go to the channel and select the fn key bottom left of touch screen and there you can map from any in or out of stage box.

[G LeeParticipant]

No it will not change anything other than the point it sends to the qu-drive. I send post preamp and all ya get is dry signal what the mic hears. the rest of the board is not affected.

Gary

[G LeeParticipant]

I just got a response from A&H sales:

Hi Gary,

Phantom power is indeed available on channels 17/18. Keep in mind, however, that these 2 channels are permanently “ganged” to 1 fader as a stereo channel, so all adjustments, including gain control, will affect both microphones, and they will be permanently hard-panned full left and full right.

Cheers,

Ryan Landry

—
ams.support

[G LeeParticipant]

So does the 48V button appear on the stereo channels on the touchscreen? I understand phantom will ultimately come from the stage box on all channels but currently the 48V button dissappears on the stereo channels. Does software rocognize the ar2412 and the button appears?

Thanks,
G

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