US Acoustics

[jujumantb 10+ year member]

US Acoustics class A/B amps are sadly hit or miss... I owned two USX 2080's, the first didnt have any noise issues and sounded great, but the first hot day of summer, it went into protection and never came out, that was after owning it all through fall and winter without problems. I figured it was just a fluke so I got a second one and this one was horribly noisey. I only paid I think $60 each so no huge deal. I said f-it and splurged on a nice eclipse amp, still going strong to this day. I also owned a USX-800D (class D sub amp), and never had a problem with it, great amp, granted it was not cheap and I wouldnt even consider it a budget amp, it was a tank, also still going strong to this day.

 

[justsayk 10+ year member]

Well, i've been doing some reading on the usx series amps and it seems like a lot of people have some noise issues like the one you are describing. I would just do everything you can to make sure your RCA's are up to par. I just bid on a usx4085 and am hoping that i wont run into this problem.

 

[JoseMCeee 10+ year member]

well i do know my rcas are pretty cheap. I just never bothered to upgrade them cuz people told me it was a waste. I gess I will look into it but play around with it for a while to see if i can fix it and then I will look into some new rcas maybe stinger. BUT enuff of the regular speaker talk, Im Getting my SE TOMORROW!!

 

[JoseMCeee 10+ year member]

Little update. I was playing around with the settings while in a parking lot and I achieved some pretty good sound. Even tho right now the HU is faded to -4 cuz the comps can get pretty loud and harsh, everything else is good. Even tho they are small and cheap comps I got them to sound clear and hitting some decent midbass. I actually felt them do some minor rattlin by themselves with the subs off lol. Well Ima keep working on that hissing problem but right now it isnt too much of a problem because the comps are loud as hell and I cant even hear it when Im listening to music.

 

[KingDiamond 10+ year member]

I used to have a US Acoustics amp and it would hiss through my boston acoustics speakers. Now I have a PPI amp and the sound was so much clearer and there was no hissing. I think it just depends on how well the amp is made. When I had Alpine amps there was only a little hissing compared to the US Acoustics but it was still there.

 

[JoseMCeee 10+ year member]

so the hissing is something im just gonna have to deal with?

 

[preunnerv6 10+ year member]

What are your gains set at? (I didn't see it posted.) I've had the older USX Usacoustics amps and they were fine once the gains were set properly. But that's true of many amps.

Also, I don't know if the USC (newest) versions are having problems or not. But the older ones worked well for me.

 

[JoseMCeee 10+ year member]

level is lower than 3/4 but higher than 1/2.

 

[DBfan187 5,000+ posts]

I'd say it's a faulty ground, but I'm not really sure.

 

[justsayk 10+ year member]

1/2 gain should be enough with 4 volt preouts.

 

[JoseMCeee 10+ year member]

I'd say it's a faulty ground, but I'm not really sure.

maybe. I will turn it down to 1/2 then. I just thought it would be better to give the speakers the rms they are rated at. I gess i kinda contradict myself when I fade the channel to the rear. its at -5 //content.invisioncic.com/y282845/emoticons/uhoh.gif.c07307dd22ee7e63e22fc8e9c614d1fd.gif

 

[JoseMCeee 10+ year member]

ya i kno. I will fix it tho.

 

[preunnerv6 10+ year member]

ya i kno. I will fix it tho.

Good. Just start from square one and go through the basic procedures for gain setting. Starting by setting the fader to 0. At least it will eliminate a couple of things.

 

[mtx4life 10+ year member]

Well ya did that right... i still think thier is something interfearing with it... hmm i will get back to ya

 

[JoseMCeee 10+ year member]

well i returned the USC amp for a full refund and got the KX450.2. I installed the KX amp exactly the same way as the USC amp and there is no hissing and sounds clear. Maybe just a defective amp but I decided to go with the Kicker amp anyways.

Check it out here:

http://forums.caraudio.com/vb/showthread.php?t=81099&page=1&pp=15