Mbox Pro Headphone Outs Left Channel Only

[maxlor314]

Hi, I have an Mbox Pro (third generation) that I use with a mac, and I'm generally happy with it. Today I tried to use the headphone outs for the first time, and I only get a signal coming out the left channel.

I tried both Headphone A and headphone B. I tried sending the signal from different sources. I also tried uninstalling the Mbox software, trashing preferences, and re-installing the latest version with the latest firmware. The meters in the Mbox software show a stereo signal, but it's still only coming out of the left channel.

Has anyone else encountered this? Does anyone know a fix?

THanks
Max

[crizdee]

Originally Posted by maxlor314

Hi, I have an Mbox Pro (third generation) that I use with a mac, and I'm generally happy with it. Today I tried to use the headphone outs for the first time, and I only get a signal coming out the left channel.

I tried both Headphone A and headphone B. I tried sending the signal from different sources. I also tried uninstalling the Mbox software, trashing preferences, and re-installing the latest version with the latest firmware. The meters in the Mbox software show a stereo signal, but it's still only coming out of the left channel.

Has anyone else encountered this? Does anyone know a fix?

THanks
Max

Hi,

Have you tried another set of headphones? tried the headphones on another device? given the headphone socket a clean?

If the output in pro tools shows stereo level then the headphones should also be stereo-both-channels etc. would most likely be dry connection somewhere and not software related.

Are you able to connect speakers to the outputs to check stereo is working ok?


chris

[maxlor314]

Hi Chris, thanks for the advice. It was the headphones after all. More specifically, it was the 1/4 in. adapter on my Audio Technica M50.

Luckily, my office has several pairs, so I tried the 1/4 inch adapter from a different pair and it worked! Look at the difference in the 2 connectors. This is from the same headphone model, but I bought them a couple years apart: