old school amp and rack setup - SRT Forums

sschung · 10-24-2009, 09:44 AM

this is one for the folks who are familiar with some of the older stuff. i recently got my hands on a USAmps 5 channel USA-5600 (one of the pre buyout models). i was planning on powering my comps and sub with this. unfortunately i didn't get a manual and there are a few things that i'm not sure about with this amp. the amp is supposed to be 2 amps in 1 case. it has 2 rca inputs but they are labeled as front and rear inputs. there are 5 outputs. the front and rear are pretty logical but which input controls the sub channel? there is also a switch that selects either 2 or 4 inputs. what does this do? are they referring to outputs to the speakers for bridging?

the other thing is i want to mount this to the back of the rear seat in srt. i was planning on an aluminum or wooden mounting board where i can mount the amp, crossovers, fuses, distro blocks etc and then mount that board to the back seat. is this a good idea? can i screw into the back of the rear seat? i don't want to take up trunk floor space as i'd like to maintain some usable room.

any comments on the performance of the amp are welcome. i have only read about this amp (it's not even hooked up yet). unfortunately i don't have the manual or birthsheet so if anyone knows of this somewhere online please post up a link! it's supposed to be rated at 75X4 @4 ohms and 500X1 @1 ohm. it feels pretty light to be handling that sort of power....

thanks in advance.

nineball · 10-24-2009, 06:29 PM

if there are only 2 sets of inputs then it must have a built in splitter so to speak and it takes one of the signals and uses it for the 5th channel. the 2 vs 4 inputs are usually used when bridging channels which would make it function as a 3 channel amp. chances are this would make your amp 150x2 + 500x1.

you can mount them to the seats just make sure your mounting platform is securely mounted to the seatback first.

sschung · 10-24-2009, 11:19 PM

do you know what the seatback material is? is sheet metal or some sort of plastic.

i was busy all day today but i'll hook up the amp tomorrow and see what the inputs actually control.

nineball · 10-25-2009, 08:33 AM

i am sure if you search on here you will find the answer. i believe it is sheetmetal under the carpeting, but don't quote me on that.

Bigness · 10-25-2009, 07:15 PM

There is a sturdy surface to mount amps on the backseat. idk what its made out of since I didnt look to see what it was.

sschung · 10-25-2009, 09:40 PM

turns out the amp might be bad. i'm getting some 'static' on the music on the non sub channels. back to back tests with my old amp definately shows some issues with the 5600. which is a shame because the sub channel sounds a lot smoother and controlled than my old amp...