[linux-audio-user] USB 1.1 soundcard

Christoph Eckert mchristoph.eckert at t-online.de
Sun Nov 14 17:55:56 EST 2004

>  - It has 2 Mic-Ins with XLR and Phantompower all feed from
> the USB-bus, no extra powersupply.

Isn't phantom power 48Volts?

I wonder that the device can get 48V from the USB bus. One 
device is allowed to get a maximum of 500mAmpere from the 

USB is 5V. This means, the card has to convert 5V to 48V and 
would certainly need more than 5V/500mAmp. Maybe the phantom 
power is only available in conjunction with an external power 

Just my 2 Cents.

 Best regards


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