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need help with setup

Old 08-22-2006, 12:56 AM
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need help with setup

i have a 10'' Planet Audio Pro series(p10c-8) 8ohms subwoofer... i was wondering what type of amp i would need to run this sub.. i do not know much about subs and amps.... i only bought this sub becuase it was marked down from $499 to $99 becuase of a massive clearance sale and i happened to notice this sub..... i already have 2 10'' in the trunk but would like to take them out and use this one as my trunk is fairly small and could use the extra room.. just wondering if a special amp is needed to run a 8ohm sub... im not even sure what kind of amp i am running right now... it was a walmart special.... only bought it becuase my old mtx amp bit the dust and i was a little strapped for cash...anyway anyone have any recommendation to what type of amp i need to run this sub any help would be appreciated
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Old 08-22-2006, 07:06 AM
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Its pretty hard to find a cheaper amplifier that will amke much power at 8 ohms, most amplifiers need to be at 4 ohms and down to make power.

Your best bet is to look online or at a local shop and ask what they have for amps that put out decent power at 4-8 ohms

I sell car audio and can get you a amplifier for a decent price that would push that 10" very well

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Old 08-22-2006, 01:48 PM
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yeah thats kind of what i thought... how much would i be looking at for somthing to power that sub... $300 or so...
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Old 08-22-2006, 02:01 PM
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Get a 2 channel amp and bridge it.
Since bridging it combines the 2 channels, the amp would feel the same load as 2 4ohm speakers running stereo.
However, when looking at the specs sheet, don't look at the bridged wattage, look at the 4 ohm stereo wattage, then add those numbers together and you will get your 8 ohm bridged wattage. Eg:

RMS @ 4 ohm stereo: 2 x 125
RMS @ 2 ohm stereo: 2 x 250
RMS @ 4 ohm bridged: 1 x 500

Take 125 + 125 = 250.
This amp would do 1 x 250 @ 8 ohm bridged.

That is perfectly healthy for an amp. It will run nice and cool, and the THD will be lower than 4 ohm bridged (not that it would really be noticeable).

The draw back: You can't get maximum output from the amp, unless you buy a second 8 ohm sub, then each sub will receive 250 wrms as the amp pushes its full power of 500 wrms @ 4ohms.
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