audiotx

Standalone MBOX2 as headphone amp
« on: December 29, 2017, 02:18:16 PM »
Does anyone have a circuit diagram or knowledge how I can use an MBOX2, powered with USB but NOT connected to any computer as a simple headphone amplifier?

Due to new mixing desk we have a MBOX2 that is not used

We want to put line in, then use the MBOX just an amplifier for headphones, nothing more, no signal out via USB or digital

We have powered the MBOX2 with USB power and panel lights do come on but the unit appears dead without a computer linked to it, even though we have stored default conditions in it.

Is there firmware in the unit that at least operates the interface circuits for line in and headphone out?

What is stopping this simple function?

Many thanks for any advice/solution


ruairioflaherty

Re: Standalone MBOX2 as headphone amp
« Reply #1 on: December 29, 2017, 08:24:42 PM »
Does anyone have a circuit diagram or knowledge how I can use an MBOX2, powered with USB but NOT connected to any computer as a simple headphone amplifier?

Due to new mixing desk we have a MBOX2 that is not used

We want to put line in, then use the MBOX just an amplifier for headphones, nothing more, no signal out via USB or digital

We have powered the MBOX2 with USB power and panel lights do come on but the unit appears dead without a computer linked to it, even though we have stored default conditions in it.

Is there firmware in the unit that at least operates the interface circuits for line in and headphone out?

What is stopping this simple function?

Many thanks for any advice/solution

Have you tried turning the mix control all the way anti-clockwise?