On Tue, July 17, 2018 1:06 am, hollundertee@xxxxxxx wrote: > I figured out that newer USB standards allow for > more power hungry devices, but does that in any way help with a USB 2.0 > device? I think in principle a new device could support the newer power standards and still run the data transfer as USB 2.0, but I doubt any devices actually do that. If there were such a device it would likely have a USB C type connector instead of the traditional square USB B connector. > My interface is the same old Edirol UA-25 that I've been using for a > couple of years now. It is USB 2.0 and bus powered. Bus powered means the entire device is limited to under 2.5W. > It needs to supply a Rode NT-1A with phantom power and > drive my new AKG K702s at the same time. Rode does not provide information about the power consumption of the NT-1A, other microphones vary anywhere from 2mA to 10mA, usually 3mA-6mA would probably be considered common, so using under 0.3W of your 2.5W total power budget (per microphone). The K702 spec lists the maximum input power as 200mW. That would be well over 110dB, so quite loud. So one microphone and headphones at deafening levels should only account for 0.5W of the 2.5W available power. Should be no problem. > I noticed that I need to increase the output > gain a fair bit to get a good level (roughly at 50%-60% whereas I > have it at 20% with speakers). You have an amplifier between the line level outputs and your speakers. You could always add an external headphone amp if you would rather spend more money than twist your volume knob. > Is it any help to plug it into a USB 3.0 or 3.1 port? No. -- Chris Caudle _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx https://lists.linuxaudio.org/listinfo/linux-audio-user
