Quick run down of what I currently have:
Alpine head unit w/ only 1 pre-out
5 1/4 component speakers & 6 X 9 coaxial speakers
400W 4 channnel amp

I want to add some bass and I know someone who is selling 2 Audiobahn 12's w/ 400W RMS each & a RF Punch 400S 2 channel amp w/ 400W RMS X 1 @ 4 ohms in bridge mode. My question is will I be able to use this amp & subs w/ my current set-up, is this a good combo to add to my current set-up? I just want to make sure before I buy. I am not after being the loudest or anything like that, I just want to add a little bass to my current set-up. I dont know anything about wiring & stuff so I will have a professional do the install.

Thanks.

 

If those 12" subs are single voice coil and you run them in paralell with the amp you can bring that amp down to 2ohm bridged (it will take this as i used to own that exact same amp) trust me, it will make some nice deep bass. The punch series amp also has a bass booster remote which is handy so if you are listening to some music with too much bass you can dial it down...and if there is not enough bass then crank it up.

I think with a properly built box to fit those 2 12's, with that amp you will be happy with the outcome.

 

They are DVC subs, I just want to make sure that the amp is good enough to drive the two 12's. Here's some more info on the subs & amp.

subs:
Audiobahn AW1251T
12” NATURAL SOUND WOOFER
45 oz. Strontium Magnet
Power Handling: 400 watts RMS
Frequency Response: 24Hz - 1kHz
Efficiency: 92.1 dB
PHAT Foam Surround
Non-Pressed, Non-Transfer Paper Cone
KM3’ Coated for Virtually No Cone Distortion
2” 4-Layer ASV Voice Coil
Dual 4 Ohm
2 or 8 Ohm Operation
Mounting Dimensions: Depth; 5 1/4”
Hole; 10 7/8” Diameter; 12 1/2”
MULT-CONNECT Lug Lock Terminals

amp:
Rockford Fosgate Puch 400S
Channels 2
Per channel power
100 W X 2 @ 4 Ohms RMS
200 W X 2 @ 2 Ohms RMS
400 W X 1 @ 4 Ohms Bridged RMS
Total power 800 Watts Peak/Max
Bridgeable Yes
Crossover HP 50-210Hz 12dB per Octave
LP 50-210Hz 12dB per Octave
Tone controls Bass Control
0 to 18 dB @ 45 Hz
Signal input Low level -
Quantity - 1
Type - RCA(pr)
Voltage -250mV - 6 volts
High Level -
Quantity - 1
Type - Plug(multi-pin)
Voltage -.5 - 11 volts
Line output
Power input Connector - Block
Wire gauge - 8
Speaker output Block
Power supply topology MOSFET
Output topology
Display Power -
Position - End mounted
Type - LED
Heat sink Type-Cast
Protection Thermal
Short
Overload
Remote control Included
Type - Wired
Controls -
Bass
Specifications S/N 100dB A-weighted
Damping Factor >200
Slew Rate 30 Volts/ms
IM Distortion <.05%
Stero/Mix Mono Yes
Frequency response 20 to 20k Hz +/- .5 dB
Dimensions 2.40 X 9.80 X 12.35 (inches)

 

To get the max power out of the amp, you will need to run the wiring to the subs in a series/parallel way to get a 4 ohm load.