This is the Apogee 8 channel mic pre for the Symphony I/O. Very clean sound, yet very punchy. Great for all sound sources. Brings microphones to life! Especially low output ribbon mics. Go to apogee's website to look up the specs. I take care of all of my recording gear as I intend to resell in the future. I save the box, all of the literature that comes with it, etc. To install this into your Symphony I/O,please refer to the video on the apogee website. You need to also download the software for Maestro in order to control the mic pre amps. Believe me, they sound amazing on every sound source!The price per channel vs the quality is a game changer for these modules!!The drums come to life in a big way! This module should go to the next studio owner who can care for this as much as I have. It's never been exposed to smoke,moisture or humidity. Happy bidding!Cheers!!!John