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Old 07-05-2009
monkeysteeler12's Avatar
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Universal Amp

hey, i plan on making a tool box shaped speaker box, that will hold 4 marine speakers in the bed. this would be used for tail gating and what not, and would be able to be removed easy.

my dilemma here is, i wont be able to power all 4 speakers that go to the bed-box (that run at 75wats RMS ) with my head unit. ( ill only have 2 door speakers hooked up in the cab, and im going to be using the left over two rear speaker wires to power the 4 in the bed-box.

so in total. i will have 2 speakers in the cab, and 4 outside. my HU cant put out all of that power to have them loud enough. so now i know that i would need to amp them.

i have a amp here at home, its a "pyramid pb 2600 amplifier". will i be able to use this amp to power the speakers, or will it only work for a Sub? if not, what should i get?

Thanks,
-Ashik
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Old 07-05-2009
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if the amp is a 4 channel amp then yes. not only that... but you'll be able to run all of your interior speakers PLUS the ones in your "toolbox" if you amp only the ones on the exterior.. run your rca's from your headunit to your amp, then wire the amp to your "toolbox" speakers. then run your amp on a switch so its only on when you want it to be. fairly simple project.
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Old 07-05-2009
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Originally Posted by edgeman4.0 View Post
if the amp is a 4 channel amp then yes. not only that... but you'll be able to run all of your interior speakers PLUS the ones in your "toolbox" if you amp only the ones on the exterior.. run your rca's from your headunit to your amp, then wire the amp to your "toolbox" speakers. then run your amp on a switch so its only on when you want it to be. fairly simple project.
Its only a 2 channel amp. will that work? or will the 2 channel only get the lower tones?
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Old 07-05-2009
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The channels are essentially the amount of speakers you can power. It has nothing to do with the amount of tone you hear. That is speaker.
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Old 07-05-2009
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Originally Posted by chainfire View Post
The channels are essentially the amount of speakers you can power. It has nothing to do with the amount of tone you hear. That is speaker.
thats what i thought.

the amp is rated at 2600 watts max. not sure of its RMS. but surely cant be too much lower than that. if i were to wire up 2 speakers to one outlet. i should be good. right? so in total it would be 2 outlets to 4 speakers.

is this correct?
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Old 07-07-2009
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Originally Posted by monkeysteeler12 View Post
thats what i thought.

the amp is rated at 2600 watts max. not sure of its RMS. but surely cant be too much lower than that. if i were to wire up 2 speakers to one outlet. i should be good. right? so in total it would be 2 outlets to 4 speakers.

is this correct?
you would be fine running 2 speakers per channel as long as they are 4 ohm speakers, since 2x4ohm speakers wired in parellel would be a 2ohm final load.

not trying to rip on your pyramid amp but they inflate the max power rating drastically. i would guess its 300-400w rms. a good way to guess rms power is look at the fuses. its its 40a's of fusing its about 400w rms.
40a X 14v x 70% = 392 w rms
fuses x voltage x efficency = power
this is just an estimate since every amp is different as far as efficency goes, monoblock amps are more efficient while class a/b (2 or 4 channels) tend to be less efficient.
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Old 07-07-2009
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Originally Posted by boxdgm View Post
you would be fine running 2 speakers per channel as long as they are 4 ohm speakers, since 2x4ohm speakers wired in parellel would be a 2ohm final load.

not trying to rip on your pyramid amp but they inflate the max power rating drastically. i would guess its 300-400w rms. a good way to guess rms power is look at the fuses. its its 40a's of fusing its about 400w rms.
40a X 14v x 70% = 392 w rms
fuses x voltage x efficency = power
this is just an estimate since every amp is different as far as efficency goes, monoblock amps are more efficient while class a/b (2 or 4 channels) tend to be less efficient.
yeah dude, none taken. it was given to me.

so i can use that amp, to amp my speakers, instead of amping a sub? right?
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Old 07-07-2009
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yes it should be okay, if it has a high pass filter (HPF) id use it and set it at about 40hz
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