Dear Music Friends.
I can not get an answer in The Netherlands(Europe) because all SQ-guys know eachother. So it's a little delicate to answer me.
Someone offered me a TRU C-7 4 Channel of 4 years old. It is technical 100% and looks like new. I may try it in my own car.
But for the money he askes I can also buy a new TRU-BILLET, Sinfoni 120.4X,
Celestra, and others.
What would you do?
Thanks a lot for your help.
Wil

 

Nobody any idee?

 

I love the copper so I'd probably be all over that one, but between the three you listed, if you can hear a difference you definitely are not in a car .

 

I think you are right.
The difference between speakers must be much bigger, than between amps.
My compo is the Micro Precision 5/7 combination and I heard them in different cars and with the next amps: Steg, Ground Zero(cheap and medium), MB Quart and Sinfoni. Although it is very difficult to compare in different cars, the combination with Sinfoni and Steg did sound the best.
Next week I'm able to test a copper 4-Channel in my own car, but I think I better can buy a new Sinfoni. I also have a lot of very good testreports of that amps.
Wil

 

I would go with the amp that is highest end. If you can get a top end Sinfoni, then hell yeah, unless Sinfoni has only one line, cause I do not much about that company. Other than that, I would most likely go for the Copper. Used should be ok, as the amp is probably very solidly built, and 4 years is not much.