Need true RMS wattage of this amp!

[LongThrow]

I currently have a Planet Audio PX1500M

It says its rated at 450w RMS at 4 ohms. But being a product of planet audio we all know (or at least I hope) this is a terrible lie. I figured around 100-150 because of the price tag.

No pessimistic replies. I know some of you will probably tell me LESS than what it is.

Click to read more...

 

[fasfocus00 5,000+ posts]

add up all the fuses on the amp than multiply by 10. that will give you a rough estimate. i.e it has 2 20 amp fuses, that's 40 amps total multiplied by 10 is 400 watts RMS at it's lowest stable impedance. so if it's a mono block that's stable at 1Ω than it's 400x1@1Ω, if it's a 2 channel that's bridgeable and 2Ω stereo impedance than it would roughly be 400x1 bridged or 200x2@2Ω, if it's a 4 channel that's bridgeable and 2Ω stereo than it's 100x4@2Ω or 200x2 bridged. this is all a rough estimate, you'd need to properly clamp the amp or put it on an SMD amp dyno to get a true number.

 

[LongThrow]

I see. Interesting bit of information. I need to invest in a dmm as well.

 

[caraudiochris]

beat me to it.. fasfocus00 is correct. good estimate you can just multiply the fuse values by 10.

 

[I'mPoor:(]

add up all the fuses on the amp than multiply by 10. that will give you a rough estimate. i.e it has 2 20 amp fuses, that's 40 amps total multiplied by 10 is 400 watts RMS at it's lowest stable impedance. so if it's a mono block that's stable at 1Ω than it's 400x1@1Ω, if it's a 2 channel that's bridgeable and 2Ω stereo impedance than it would roughly be 400x1 bridged or 200x2@2Ω, if it's a 4 channel that's bridgeable and 2Ω stereo than it's 100x4@2Ω or 200x2 bridged. this is all a rough estimate, you'd need to properly clamp the amp or put it on an SMD amp dyno to get a true number.

Doesn't mean it will be clean power.

 

[caraudiochris]

^^^^ This!!

 

[LongThrow]

Difference in general bass output with dirty opposed to Clean Power?

 

[gckless 5,000+ posts]

Difference in general bass output with dirty opposed to Clean Power?

Output will be higher.

Until the sub smokes.

 

[LongThrow]

That's funny. You get what you pay for I guess.

 

[hispls 5,000+ posts]

add up all the fuses on the amp than multiply by 10. that will give you a rough estimate. i.e it has 2 20 amp fuses, that's 40 amps total multiplied by 10 is 400 watts RMS at it's lowest stable impedance. so if it's a mono block that's stable at 1Ω than it's 400x1@1Ω, if it's a 2 channel that's bridgeable and 2Ω stereo impedance than it would roughly be 400x1 bridged or 200x2@2Ω, if it's a 4 channel that's bridgeable and 2Ω stereo than it's 100x4@2Ω or 200x2 bridged. this is all a rough estimate, you'd need to properly clamp the amp or put it on an SMD amp dyno to get a true number.

Most manufacturers over-fuse to start with, and many of the unscrupulous ones will purposely use or recommend even larger fuses to fool people who think they're clever because they read this online somewhere.

OP, do you really care? Does it sound good? Naught for nothing, but the last thing that said Planet Audio on it that was worth owning was made in the USA and had tubes in it.

 

[LongThrow]

Yes I care. Im unemployed and work with what I have.

 

[negolien]

I think that was his point if it works does it really matter. Especailly if you out of work what you're going to go spend money on car audio? priorities my friend.

 

[LongThrow]

Any amp would 'work'. It having adequate power is a different story.

And I agree, I'm a slave to audio.

 

[n2audio 5,000+ posts]

the whole "clean" vs "dirty" comparison always seemed pointless to me.

A $2500 Brax will sound "dirty" if you clip it.

Just as a $50 Pyle will sound "clean" if you don't.

People with high dollar amps would like to believe their 0.01% THD (at rated power) sounds better than someone else's budget amp with 0.50% THD at the same amt of power. They're kidding themselves.

Don't clip your amp and it'll sound fine.