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Old 01-03-2004, 06:53 PM   #1
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im looking at getting the following with my next bonus check:
Infinity 5 1/4" components
Infinity 3 way 6x9'*
Infinity 1230W 12" sub
Rockford Fosgate punch 301S 300RMS x 1 bridged at 4 ohms

my question is, the midranges all can handle up to 100 watts rms but my HU only puts out 50, what type of amp should i get to power atleast my components closer to their max power handling level? a 2 channel amp most likely but alot of amps i see say something like 50 watts RMS x 2 at 4 ohms but wouldn't that be pointless as my HU puts out 50 RMS already? or do they combine?

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Old 01-03-2004, 07:02 PM   #2
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ur head unit wont be able to power ur components at all, let me break it down for u

50/4=12.5 watts peak= about 5 watts rms
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Old 01-03-2004, 07:33 PM   #3
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no way its only 5 watts rms per channel...my alpine deck is 27 watts rms per channel
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Old 01-03-2004, 07:36 PM   #4
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im sorry but there is no such thing as a 27 watt head unit, almost all companies lie about their head unit power ratings
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Old 01-03-2004, 08:57 PM   #5
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sorry i didn't make that very clear, its 50 watts RMS by 4. would hooking up a 50 x 2 amp change anything at all or would it still be putting out the same 50 watts per channel as the HU does?
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Old 01-03-2004, 09:11 PM   #6
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but even if it is a 50 watt rms amp, its only putting out about 10 watts per channel, and it might be rated at a higer voltage that u could never realistically put it through as well, thats how some companies justify their inflated ratings, a 50 by 2 amp would be putting out 25 watts per channel
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Old 01-03-2004, 09:42 PM   #7
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double
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Old 01-03-2004, 09:44 PM   #8
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Ok maybe it will be clearer this way:

I want to get Infinity REF505CS they say they can handle 75 watts RMS and 225 watts peak.
does this mean 75 watts rms for the whole set?

My head unit is listed as MOSFET50 (50W x 4-channel) so thats actually 12.5 per channel and not 50 per channel?

what would be a good power amp to use with the above listed headunit and components?

EDIT: the 50 x 4 being 12.5 per channel really suprises me because pioneers top of the line head unit is still 50 x 4 as is their bottom of the line unit.
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Old 01-04-2004, 01:15 AM   #9
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All recievers , amps and headunits are rated per channel. therefore 50x4 is 50 and 50 and 50 and 50. They say 50x4, but that'* a peak rating. Most will do 20-22, some go up to 27 as zzzzzeke mentioned.

That will be fine for normal listening, but if you want top sound quality, or want to compete, or just volume that hurts your ears an amp is recommended.
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Old 01-04-2004, 02:50 AM   #10
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Also dont forget what most comapnies list their specs for head units its peak, not RMS rating. I would still recommned getting a amp for you highs & midrange. Otherwise if you have the bass setup to loud youll drown everything else out.
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