Gear / Technical Help > Battery Boxes, Preamps, Mixers, ADCs, and Processors

Sonosax SX-M2D2 Coming...

<< < (39/39)

kindms:

--- Quote from: wforwumbo on August 19, 2024, 11:18:58 PM ---I got my hands on an M2D2. This thing sounds incredible, especially for its size. It’s become my go-to for studio and mains pairs work. I can’t wait to break it in for taping use.

--- End quote ---

i love mine. sold my v3 again. LOL

wforwumbo:
I finally picked up a 744T, does anyone have experience in running the AES3 out of an M2D2 to the AES3id BNC input of a 744T for channels 3/4? I found a Lundahl 1.2:1 (110 to 75 ohm) transformer, I plan to build my own junction box to make the match between AES formats.

audBall:
I've ran mine about 6 times so far with 4 nights at the recent Phish run. I absolutely love this box. These were all ran directly into my iPhone with no issues, but I did have Ted make a AES>coax cable for running into a PMD-661.

DSatz:
wforwumbo, for best reliability, a transformer of that kind belongs at the far end of the main cable, i.e. the recorder end, with the shortest possible cable for the unbalanced part. Interference isn't generally the issue so much as impedance matching. And higher sampling rates are more critical about that kind of matching than lower ones are. Do you have proper AES/EBU signal cable with 110 Ohm characteristic impedance, or are you using ordinary analog mike cable?

wforwumbo:

--- Quote from: DSatz on September 12, 2024, 02:38:17 PM ---wforwumbo, for best reliability, a transformer of that kind belongs at the far end of the main cable, i.e. the recorder end, with the shortest possible cable for the unbalanced part. Interference isn't generally the issue so much as impedance matching. And higher sampling rates are more critical about that kind of matching than lower ones are. Do you have proper AES/EBU signal cable with 110 Ohm characteristic impedance, or are you using ordinary analog mike cable?

--- End quote ---

Hi David, thanks for chiming in. That falls in line with the electrical engineering theory of running an unbalanced line - shorter distances are better and prevent the transmission channel from shifting the phase angle of the load impedance seen by the source. I do intend to run at 24/96 (and occasionally 24/192).

I plan to use TA3F out of the M2D2 into my box. The Lundahl transformer I found presents a primary impedance of 110 ohms and a secondary impedance of 75 ohms, so I'm all set there, and the mic cabling I build just needs to correct the right ports of AES3 out of the M2D2 to the correct taps of the transformer. I should probably specify that I intend to build the cabling myself, insuring that I'll be impedance matched throughout.

As a temporary stopgap, I purchased a Canare impedance converter for going from AES3 to AES3id/SPDIF and converts from 110 ohms to 75 ohms; I am willing to gamble it has a similar transformer that I plan to use in my own build.

Navigation

[0] Message Index

[*] Previous page