Hello TB, I am looking at purchasing a Barefaced cab soon (I have only owned combo amps so far) and I want to pair it with an amp head that has a XLR line out with it's own level control. I'm not sure yet which cab I would get, so I can't give too many specifics on the power of the amp I would need. I know Markbass amp heads have this feature, as well as some Fenders (sadly not the rumble series, which I really was intrigued by) and some GK's. I really love this feature for gigs because it allows me to send a set volume to the front of house and adjust my amp on stage as needed without causing any changes to the mix the sound techs have. Can anyone recommend any other brands of amp heads that have this feature? Thanks!