Mbox 2 Pro, distorted output signal

[Espen_80]

Hi!

I'm having trouble with a recently bought Mbox 2 Pro. Unpacked it today.

Even when it's not connected to my PC (used standalone), I get distorted / crackling sound from the outputs (Mon Out, Line Out 1-4, Headphones A & B, have not tested Line Out 5-6). It's not a distorted signal all over the frequency range, but I am hearing quite a lot of pops an crackles mixed with the signal.

I've used different input sources, all of them giving the same result:

* Keyboard, TS jacks connected to DI inputs
* AKG C414, Shure 58, connected to XLR inputs
* Sony MP3 player, connected to DI inputs

The Input Peak LEDs indicates good signal. The amount of distortion is not affected by the amount of gain (at least not until the signal peaks high). I've also tried using the pad switches.

I've tested my monitors, cables, input sources etc. with an Echo AudioFire 8, everything works perfectly.

Any ideas? Faulty hardware? Contact Technical Support for an RA?

Best regards,

Espen