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I am aware they are old

Kenwood KFC-W3009

# 12" 4-ohm subwoofer

# pearl mica injection-molded polypropylene woofer cone with urethane foam surround

# overlapping ribs on cone surface for improved rigidity and dampened resonance

# extended pole piece and bumped back plate for increased cone excursion

# power range: 35-400 watts RMS (800 watts peak power)

# frequency response: 25-800 Hz

So My amp went out, and well I've been thinking if there was a better way of hooking these things up

Audiobahn A8002t

# 200 watts RMS x 2 at 4 ohms

# 400 watts RMS x 2 at 2 ohms

# 800 watts RMS x 1 at 4 ohms

# stereo or bridged mono output

# Tri-way capable (Tri-Way crossover required)

# MOSFET power supply

# 4-gauge power and ground leads recommended — wiring and hardware not included with amplifier

# high gloss chrome plate finish with blue illumination

# variable crossovers (50-750 Hz, 18 dB/octave high-pass, and 50-120 Hz, 18 dB/octave low-pass)

# subsonic filter (20-50 Hz)

# 18 dB bass boost (switchable on/off)

# preamp outputs

# preamp- and speaker-level inputs

# cooling fan

I'm considering purchasing this amp:

Kenwood X1200M


• 800W RMS x 1 @ 4Ω

• (20Hz-200Hz @ 1%THD)

• 1200W RMS x 1 @ 2Ω

• (100Hz @ 1% THD)


• 800W RMS x 1

• (RMS @ 4Ω, 1% THD+N)

• 75dBa Signal-To-Noise Ratio


• Variable Low-Pass Filter: 50Hz-200Hz (-24dB/oct)

• Variable Infrasonic Filter: 15Hz-40Hz (-24dB/oct)


• Battery: Hex Type (4 AWG)

• Ground: Hex Type (4 AWG)

• Speaker: Hex Type (8 AWG)

• Operating Voltage: 14.4V

• Current Consumption: 90A

• S/N Ratio: 105dB

• Frequency Response: 20Hz-200Hz

• Input Sensitivity: 0.2V ~ 5.0V

I've been looking at wiring diagrams at Crutchfield.com

Since the subs work (hooked up an old amp to test), I didn't really feel the need to replace them, they sounded great so, I figured no need to change anything. But, I always felt the subs should have hit much better, so I just always figured it was the amp, but after looking at a few wiring diagrams on crutchfield.com I found maybe it is better to use a single channel with a daisy chan setup at 2 ohms. (I was probably running them at 200 RMS, instead of the 400 RMS at 4 Ohms). I am a beginner with this kind of stuff, but I don't mind reading, and I don't see how my system can be that complicated to warrant a pro setting it up. I have been check out parallel diagrams, and series diagrams, and it seems the best setup would be to run a parallel setup at 4 ohms running 800 watts RMS with a single channel? Not sure if that would damage my speakers though.

I am also looking at the head unit (as I guess that went out too lol), Alpine iDA-X305 since I have the iPhone 3gs, but I've seen good and bad reviews will be checking it out in person before buying from store/off web.

Some input would be great, thanks in advance.
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