New guy with a few questions.

[tulmkr]

Hi folks, I am new to this forum, and am not sure if this is the place to post this question, but I will give it a shot.

I am trying to use my improve the quality of my audio signal while transmitting through an old cb radio. I am currently running a shure sm-58 mic into an old rolls mixer via an xlr cable, and out of the mixer via a 1/4" tsr cable into my transmitter. I built a box that allows me to use a pus to talk button to key up the radio, and pass the audio into it. It actually all works pretty good, and I get great reports on how good the transmission sounds.... almost fm quality.

I am trying to further improve the audio quality by using a behringer vx2000 processor. I picked it mainly because of its low cost, but also because it has all I really need...pre amp, enhancer, compressor, tube emulation, generic eq, and a de-esser. I am however running into a problem that I didnt anticipate, and perhaps someone can steer me the right way. When I plug my mic into the vx2000, and then into my transmitter, I seem to lose all of my audio modulation. basically nobody can hear me. I ahve tried turning off each of the features trying to figure out which one might be causing the low signal, but I am not having any luck. I am hoping that someone can tell me the proper way to run my audio cables in the event that I somehow have it wrong. It seems very simple....mic xlr to input xlr, and tsr output to my ptt audio input. The only thing I can think of that might be wrong, and causing the low audio signal is that the audio output on my ptt box is unbalanced, and I am running a balanced signal in.

Any advice on this off topic would be greatly appreciated, as I am at my wits end, and have nowhere else to turn, but to the guys who know audio gear best.

Thanks in advance for any, and all replies.

 

[tulmkr]

In case anyone is wondering why I posted here, its because its the final audio quality that I am looking to improve. The radio itself will only pass some of the final audio signal due to the built in frequency range the radio is designed to pass.

 

[mjbphotos]

Does your mixer have an aux send/return? If so, send the processed signal back to the mixer rather than to your transmitter.

 

[ahiddentableau]

From the descriptions of your chains, in the first case you're going to the radio from the mixer, while in the second case you're last link before the radio is the processor. If that's the case, then in the first situation you'd be at mic level, while in the second case you'd be at line level, right?. That would easily explain the difference in gain/volume. Just my impression from your description from a "simplest explanation is likely the right one" perspective. Good luck.