Adding capacitor ???

[Vital 10+ year member]

So i got a sub and amp and looking for comps speakers and amp for them to be installed in my 2008 Altima sedan with already installed Kenwood DNX 5120

Will install everything in one shot when i get it all together.

Crutchfield advisor recomended getting a capacitor at least for a subwoofer amp. I have no idea how it works, what exactly it does and most important - do i really need one???

btw, what do u think of these:

Here's my sub and amp:

http://www.crutchfield.com/S-Zceko5yYeu3/p_107DB1212/Polk-Audio-db1212.html?tp=112

2-ohm impedance

frequency response: 26-200 Hz

power handling: 50-360 watts RMS (720 watts peak power)

sensitivity: 97 dB

http://www.crutchfield.com/p_107PA4001/Polk-Audio-PA400-1.html?tp=115

mono subwoofer amplifier

200 watts RMS x 1 at 4 ohms (300 watts RMS x 1 at 2 ohms)

400 watts RMS x 1 at 1 ohm (1-ohm stable)

CEA-2006 compliant

Class D amp with MOSFET output and power supply

variable low-pass filter (30-250 Hz, 12 dB/octave)

selectable bass boost (8 dB) at 40 Hz

and here's comps and amp i'm thinking of getting:

http://www.crutchfield.com/p_107DB5251/Polk-Audio-db5251.html?tp=106&tab=features_and_specs

power range: 10-100 watts RMS (250 watts peak power)

frequency response: 53-23,000 Hz

sensitivity: 93 dB

http://www.crutchfield.com/p_575P4002P/Rockford-Fosgate-Punch-P400-2.html

2-channel car amplifier

100 watts RMS x 2 at 4 ohms (200 watts RMS x 2 at 2 ohms)

400 watts RMS x 1 bridged output at 4 ohms (4-ohm stable in bridged mode)

Click to read more...

 

[Raffi 10+ year member]

Skip it, you do not need it.......................

 

[Buck 5,000+ posts]

Save your money for an extra battery or something of that nature.

 

[geowick07 10+ year member]

Agreed. No need for a capacitor.

Use the cash to upgrade Big 3/new battery.

geo

 

[Vital 10+ year member]

Thanx,

what do u guys think of the whole set-up??

There wount be anything in the rear deck, i'll take stock speakers out.