I’ve owned a QSC GX3 for a few years and sometimes use it on pro audio gigs, and it’s a great sounding and really well designed friggin’ amp. It’s a bargain certainly and a real workhorse built like a tank, but for me its fan noise is way too loud for studio or hifi stuff unless you hide it under something maybe, and it’s NOT made in the USA (China) which is why it’s so inexpensive. Balanced and unbalanced inputs, level Note that if you use one for home listening be careful as pro amps like these really swing the juice and can instantly blow the drivers out of pretty much any hifi speaker. I saw one of these in a pic from an article about the Magico factory so I guess they like ’em too.