us amps xt4000d - .5 ohm stable?

[Kold_Killa 10+ year member]

I have a chance to buy this amp from a buddy... I actually originally bought it for a friend, he sold it to this buddy and now that buddy wants to sell it, but it probably has a total of 8 hours of play.

Anywho, I don't really NEED it unless it is .5 ohm stable or even .67?!?! If it can achieve that load daily, well then I guess I would NEED it in order to push my additional or additionals mach 5 15s ... Let me know if anyone has any experiece with sub 1ohm loads with this amp. I know US AMPS normally can go below, but that is on some of there better stuff. Thanks.

Kold

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[mike dressure 10+ year member]

no they arent 1/2 ohm stable and a highly reccomemnd that you do not go below 1 ohm!

 

[Kold_Killa 10+ year member]

All i needed to know, thanks.

 

[supa_c 5,000+ posts]

Just so you know...

the amp does around 800w@1 ohm, not the overrated 1500w

 

[Kold_Killa 10+ year member]

supa... I have trouble believing that.... This amp at 1.37ohms absolutely made my buddy's 6 10w1s SLAM, better than my amp that is rated at 1100rms at 1 ohm (but believed to put out a little more).... I would say that this amp does rated or near rated power.

 

[jacka 10+ year member]

might be a little bit more than 800, closer to 1200. definitely not 1500 though, not sure why they overrated it like that. its like that for the whole line.

 

[dalucifer 10+ year member]

Look at the fusing..3x25 amp fuses. Which will be roughly 800 rms.... basic ohms law

 

[supa_c 5,000+ posts]

supa... I have trouble believing that.... This amp at 1.37ohms absolutely made my buddy's 6 10w1s SLAM, better than my amp that is rated at 1100rms at 1 ohm (but believed to put out a little more).... I would say that this amp does rated or near rated power.

ya sorry...but it doesnt do rated.

Even Greg at us amps said it doesnt

 

[90accordman 5,000+ posts]

mine benched 953rms at 1ohm

 

[jacka 10+ year member]

mine benched 953rms at 1ohm

Wow. I wonder why they would rate this particular line so high. Even when I e-mailed Greg, he told me they were 1200 x 1 at 12.5 volts. I'd like to see some less overrated ratings of the entire line.. It's pretty stupid that they have to do that.

 

[dragnix 5,000+ posts]

cuz it's the entry level that appeals to the noobs, even the name is an obvious overrating //content.invisioncic.com/y282845/emoticons/laugh.gif.48439b2acf2cfca21620f01e7f77d1e4.gif

 

[supa_c 5,000+ posts]

Greg is a cocky idiot.

75A x 12.5V= 937.5 W, thats 100% efficient too...which no amp is.

Ohms law> him

 

[ProgMtl 10+ year member]

No wonder!!!!!!

I've been wondering why I had to turn the gains on my Kicker amp (comps) to only get 100rms per channel in order to make the comps match the output level of my subs.

I guess I should've known by the 3X25amp fuses that there is no way it would put out 1500x1.

I've been trying and trying to get this amp to make my (2) TC Sounds subs play like I know they're supposed to....guess I'll be getting another amp now.

All I can say is I'm very disappointed with US Amps tactics on this one.

 

[JoeHemi57 10+ year member]

the fuse ratings they list are normally wrong too so i don't know what they put out. i'm pretty sure the xt2000d i had used at least 75a of fusing.

 

[43de 10+ year member]

No wonder!!!!!!
I've been wondering why I had to turn the gains on my Kicker amp (comps) to only get 100rms per channel in order to make the comps match the output level of my subs.

I guess I should've known by the 3X25amp fuses that there is no way it would put out 1500x1.

I've been trying and trying to get this amp to make my (2) TC Sounds subs play like I know they're supposed to....guess I'll be getting another amp now.

All I can say is I'm very disappointed with US Amps tactics on this one.

Wow I just realized... I have the exact same problem.

I thought I was a complete idiot.