Apologies in advance for the crosspost to
GearslutzI have a D&R Dayner that I have been running with 3 ADAT XT20s for the last few years. In order to get the ADATs connected to the console free of ground loops, I had to telescope the ground at the channel inputs. The wiring schems was as follows:
ADAT OUT ---> Dayner INTIP--------------------RING
RING----------------SLEEVE
GROUND---------x
I was using the Elco +4 outputs of the ADAT. The Channel inputs on the Dayner are unbalanced +4 & -10 on the same TRS connector (-10 on the tip & +4 on the ring)
I recently purchased an Alesis HD24 that I have been totally unable to connect to the Dayner with out creating a ground loop. At this point, I'm just about out of ideas for trouble shooting. I have disconnected every single connection from the console except one output from the HD24. I have attempted every conceivable method of custom cable assembly to connect the HD24 to the console to no avail. I have confirmed that both devices are plugged into an outlet that is referenced to the same ground.
I have a cheap (low quality) isolation transformer that successfully broke the loop. However, 24 channels of high quality isolation transformers is out of my budget right now.
The only other success I have had in breaking the loop is plugging the power cable of the HD24 into a grounded-to-ungrounded outlet adapter. While this successfully broke the loop, I am wary of implementing it as a long term solution.
Is there anything else I can do other than lifting the earth ground of the HD24?
If there is any other info I can provide that may be helpful in solving this problem, please let me know.
- jon