which sub is better out of these ones..?

if he's working with 500 bucks then an alt upgrade is out of the question.

 

Car Audio Reviews – Car Stereo Amps, Speakers, Subwoofers, & More Product Tests - Car Audio & Electronics Magazine

read a few reviews on some subs and amps.
Zero Gravity And Kicker - Subwoofer Enclosure - Car Audio and Electronics Magazine

 

ya, i agree, it's a shame though he can almost do it. I have a place for 200 amp alternators for $200.00. Ok let me try one more time lol. This is only 60 amp draw.

Hifonics ZXi 6006 - 150 watts RMS x 2 chan. @ 4 Ohms / 300 watts RMS x 2 chan. @ 2 Ohms / 600 watts x 1 chan. @ 4 Ohms • Bridgeable • Bass Remote • 95 dB - , Car Amplifiers, 2-Channel Amps - Sonic Electronix


These have free shipping
Kicker 07CVR124 - 12" 800 watt Component Subwoofer • Dual 4-ohm Voice Coils • 400W RMS • Polymineral Injection ISD Cone • Stamped Steel Basket • Ultra-Length Voice Coils • Rear Cone Brace - , Component Subwoofers, 12" Component Subwoofers - Sonic Ele

 

oops, for two subs you need them to be dual 2 ohm to run at 2 ohms

This is the correct link, still free shipping.

Kicker 07CVR122 - 12" 800 watt Component Subwoofer • Dual 2-ohm Voice Coils • 400W RMS • Polymineral Injection ISD Cone • Stamped Steel Basket • Ultra-Length Voice Coils • Rear Cone Brace - , Component Subwoofers, 12" Component Subwoofers - Sonic Ele

 

haha, my bad the first link for the subs is right. The amp runs 2 channels 300 watts each at 2 ohms, so you would need two 4 ohm dual voice coil subs and run each sub at 2 ohms on each channel. Someone correct me if i'm wrong, i always get confused on this lol.

 

yes he can run them at 2 ohms on each channel.

 

cheaper one!! lol same power

Hifonics Titan TXi 6006 - 300W RMS x 2 ch. @ 2 ohms • 150W RMS x 2 ch. @ 4 ohms • High-speed MOSFET outputs • EXVP MOSFET power supply • Twin Turbo SPC Torroids for improved bass response - , Car Amplifiers, 2-Channel Amps - Sonic Electronix


600 watt square hifonics!! lol
Hifonics BX12SQD4 ( SQUARE ) - Brutus Series Square Dual 4-ohm 12" Subwoofer • 600 watts RMS • 1200 watts Max • Illuminated Woofer Cone • 100oz. Double-Stack Magnet Assembly • Woven Glass Fiber Woofer Cone - , Component Subwoofers, 12" Component Subw

 

MTX is solid, i have never fried one they are strong succers. Like kicker cvr12

MTX Audio T7512-44 - Dual 4 ohms Thunder 7500 12" High Performance Super Subwoofer • 400 watts RMS power handling • heavy duty chrome push terminals • frequency response 40 - 150Hz - , Component Subwoofers, 12" Component Subwoofers - Sonic Electronix

 

one is a dual 2 ohm.the other is a dual 4 ohm

 

Decibel (Loudness) Comparison Chart
says every 10db increase is twice as loud

 

the only diff is the color and year.oh and price.
newer model than the other.

and i thought every 3 db is double the loudness not 10db.

 

I always thought that to get a 3 db increase you had to double the amp power.

 

well that too.double the power is a 3db increase.right.:huh:

hell now i need to really know.lol. i/we need an experts advice.

 

ok read the very bottom line
dB drag racing - Wikipedia, the free encyclopedia.


The current loudest car has been recorded at 180.5 dB.[citation needed] For comparison:
400dB -- Volcanic eruption
200dB -- Rocket engine at 30 m
183dB -- Blue whale humming at 1 m
163dB -- Windows break
150dB -- Jet engine at 30 m
130dB -- Threshold of pain; train horn at 10 m
120dB -- Rock concert
The perceived loudness doubles with every 3dB increase, so 178.9 dB is about 50 times as loud as a rock concert (nearly 26 = 64), and nearly 8 times as loud as a jet engine at 30 m.[1]

 

so a 10 db increase is 3 times as loud.

 

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That's all i could find so far. I'll look a bit more.