ALphasonic/ US Acoustics question

[nutxo 2]

I usually hang around phoenix phorum. I have an account here and since i just ordered some stuff I thought I would pose a question to someone who may actually be able to answer it correctly :-) I'm getting rid of a few things and posted up my USA 2150. Almost immediately the thread went south with someone wanting to know how this amp could possibly have these ratings with only a 35 amp fuse.

2 x 150W @ 4 ohms (12.9V)

2 x 225W @ 2 ohms (12.9V)

1 x 450W @ 4 ohms bridged (12.9V)

Fuse: 35A

Of course my reply, which may shock some of you was " If you run anything other than 4 ohm stereo pop in a 50 amp fuse just like hifonics" . Is this the right answer? OR ...Can the USA 2150 do rated power with a 35 amp fuse?

Now for amp porn....

[Julian 641]

35Ax12.9v= 450Watts

If it were to drop below 12.9v it may pop, but I'm not sure how efficient the amp which would play into some factors

[Julian 641]

35Ax12.9v= 450Watts

If it were to drop below 12.9v it may pop, but I'm not sure how efficient the amp which would play into some factors

[ssh 924]

I found this manual for it: http://audioclinik.com/manuals/usa.pdf

Don't see anything about switching out the amp fusing

[jcarter1885 995]

That fuse size will be fine for that amplifier, if anyone doubts you tell them to do some research about fusing amplifiers first. Zed Audio has a good write up explaining about fuse/power rating ratio's, just because an amp is rated 600 watts does not mean it will need a 60amp fuse or bigger to perform properly.

[nutxo 2]

That fuse size will be fine for that amplifier, if anyone doubts you tell them to do some research about fusing amplifiers first. Zed Audio has a good write up explaining about fuse/power rating ratio's, just because an amp is rated 600 watts does not mean it will need a 60amp fuse or bigger to perform properly.

I dunno. Ive run these before and had no issues with fuses popping bridged

[Julian 641]

I wouldn't worry then lol looks like a pretty amp!

[Aaron Clinton 2,372]

They are some of my all time favorite amplifiers. Could be my favorite ZED built, non-ZED Branded. I still hold on to my 2075. It has become one of the staples in the testing process of all SSA sub woofers. I have been on the PG forum for a long time, so I try to jump into most ZED topics on there.

[ou812 16]

I agree with everything stated above. Mantz has his own theory on fusing that most others don't agree with. And they certainly do over rated power.

[Sir-Lancelot 216]

Wow, nice collection you have there Buddy.

That amp should be fine and anyone who knows anything about these amps wont have a problem with that fuse. lol

[nutxo 2]

Thanks man. The rack full of zeds was actually replaced with a SS 705 which in turn was replaced by something else. I pretty much run a system till I find somethign interesting and then swap out or if I lie it it last though spring and summer then comes out in the winter,.