Subject: Re: [linux-audio-user] USB 1.1 soundcard
From: Christoph Eckert (mchristoph.eckert_AT_t-online.de)
Date: Mon Nov 15 2004 - 00:55:56 EET
> - 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
bus.
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
supply?
Just my 2 Cents.
Best regards
ce
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