If you are selling,expect not to retrieve much in return,as they were not well known amplifiers,and yet, that version was made after the company left jbl,and harmon kardon in the late 90s..concord digital reference series amplifiers were some of the best amplifiers that ive ever owned,and still do..3/50.2,and 2/20.2. in which are straight raw power made for the 12v vehicle systems/rated @11.6v,and were bought out by jbl/harmon kardon..concord went out on theyre own,and made approx 2 versions of theyre own,in which ended/were smothered out by compitition/and later law suite rights,and terminated.yet,that amplifier will do rated,and a little more on our 13.5-14v systems,so expect more power of course,as it does not have a regulated supply..it is a decent made amp, and id most deff. use for mids and highs. that i can remember@4ohms,and only needs 1-30amp fuse to run it.Im sure that it is a much better made/reliable amp than most of todays, and should perform well,and you should generate approx 75 true rms+ out of that amplifier per ch. ,rather than most of todays needing 8-4ga power wire,and2-30amp fuses to achieve the rms rating @14.4v..selling it,you may only retrieve $30-50 max,as it also has no cross over adjustments as well.Thats what i do know,as i have bought jbl,concord amps from that time frame,and still have today.There is no real value for that amp other than a collector,and even then..its not a real collectable as the digital reference series,and the concord 400/jbl gtq 400
the concord/jbl gtq400 version is the collectable,and ive only seen one on
ebay in the last 5yrs.great sq/along with power amplifiers.Run it if you can..you will be surprised at the true raw power it presents,and low tdh as well