I been looking for a USB sound car with RCA's out put since I'm not runing HU in my install, I want to try to tune the audio through the computer is this a good sound card for this purpouse it support support for ASIO 2.0 I know that the voltage output on this car probably it's not high but for me it's not a big deal.
option 1
http://www.esi-audio.com/products/gigaportag/
option 2
http://www.esi-audio.com/products/maya44usb/
Note:I try to do the tuning with and pioneer DSP and I did not like the results.So I red the article tuning via software etc. and decive try to get a usb car that support asio and try to do the tuning via the carputer. (my case is lowprofile for the pci cars that support tuning via software.