Adding another amp

The system i have include the kenwood x859 deck, kenwood kac 7201 powering 2 phoenix gold tantrum subs and a kac 8401 powering a pair of Alpine Spx 177A. I was wondering what happen if I got another kac 7201, so that there is an amp per sub. What would be the advantages

Can anyone one tell me what it will do, will it increase the sub performace?

yes it will. SQ and SPL. double the watts twice as loud (+3dB)If the subs can handle the watts of the amps.

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2003 Silverado Ext. cab
Kenwood mp922
Kenwood kgc6042a EQ
JL Audio xr650-csi
MB Quart PSC 213
JL Audio 300/4
pair of JL Audio 12w6v2
JL Audio 1000/1

How will it benefit the SQ portion? As for SPL the subs can take about 200 watts RMS and each will put out about 300 watts clean power (0.08%THD)

Downfall is that you'll have a hard time setting the subs to be the same, are they in a coupled chamber box or a separate chamber box?. If you are in the market for another amp, find one that is big enough to drive both with ease, that would be your best bet.

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Top Secret, I can tell you but then my wife will kill me.

right now there sharing the same chamber in a sealed box. The reason I want the new amp is so that I can fully power each sub with clean power

With a coupled chamber box like yours it is best to use one amplifier only, find yourself a dedicated sub amp that is stable to 2 ohm mono and gives you the desired "wattage" that you are looking for. A little too much power is better than not quite enough.

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Top Secret, I can tell you but then my wife will kill me.

Under the sound quality aspect, what will i gain? the one single amp can power the subs almost to their RMS rating. So will I still gain sound quality with this takin into consideration

Marginal at best, to gain a noticeable difference in output of approximately 3db results in an amp double the size. If I remember correct your amp is 150w x 2 and your subs are rated to 200w. Yes a larger amp will give you more power, hence louder, but it will also give you more control of the motion of the drivers at lower volume levels, hence increased sq.

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Top Secret, I can tell you but then my wife will kill me.

If you are looking so compete with this system i would only use one amp a amp that can handle the impedance of your subs   i didnt see what subs you have the impedance per sub...but i would recomend a nice orion or maybe a small zapco    if those are out of your price range look at MA audio

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2009 0-1000 Trunk WR 154.0DB 2009 1001+ Trunk WR
2007 USACI World Champion
2007 World Record
2006 USACI Finals 2nd Place

what do you mean more control of the drivers at lower volumes? And why can't I achieve this with the one amp?
Is the sound quality going to improve much more?

Sorry about all the questions I just quite interested in this

by the way, the subs are 4 ohm dual voice coil, so my wiring options are 4 ohms or 1 ohm (preferably 4)

if the amp has heaps more power than the sub needs, then it can cruise along with some to spare for the loud tricky bits. if your amp is already working at its maximum, then if a piece of music comes along that demands more, the amp will let you down with inferior sound quality.

for example a rapid series of drum kicks in the music could blend together if the amp is pushing its limits, but would sound clear and distinct if the amp has some power spare.

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2001 Ford Fairmont
Alpine DVD, screen,
5.1surround processor,
5ch Class-T amp, TV tuner
and centre channel.
Focal 3way Utopia splits.
VDO navigation. Stinger cap.
Soundstream Exact subs.