see this pic:

its had 4 terminals.. one you cant really see:

 

It came already factory installed in a sealed Kicker truck box, so I'm not sure what the back looks like. I just took it out of the cardboard and hooked it up. I understand what you're saying about the inputs on the speaker itself, I've mounted other subs in boxes.

The box has one set of inputs, which I assume then split off as needed. A multimeter hooked up to that one set of inputs reads 4 ohms. So regardless of how many hookups are inside the box the amplifier is going to see 4 ohms, right?

 

I've had good luck with Infinity speakers. How are their amps?

Infinity 1300a Amp: Mono - Car Amplifiers at Onlinecarstereo.com

<TABLE border=0 cellSpacing=3 cellPadding=2 width="100%" bgColor=#dde5ec><TBODY><TR id=trSpecificationsTitle><TD class=ProductDescriptionTitle>Technical Specification</TD></TR><TR id=trSpecifications><TD class=ProductDescription align=left>

• [*]

</TD></TR><TR id=trFeaturesTitle><TD class=ProductDescriptionTitle> Features</TD></TR><TR id=trFeatures vAlign=top><TD class=ProductDescription2>

• Maximum power: 342 watts x 1 chan
• 200 watts x 1 @ 4 ohms
• 300 watts x 1 @ 2 ohms
• Max power output: 342 watts x 1 chan.
• MOSFET power supply
• Wired remote bass level control included
• LED power and protection indicators
• Tuned Bass EQ (0-6 dB bass boost at 50 Hz)
• IMS inputs allows connection to other Infinity expansion products
• Gold-plated preamp RCA outputs
• DC, overheat, over or under voltage, and short circuit amplifier protection
• Gold-plated RCA level inputs
• Variable low-pass filter (32-320 Hz, 12 dB/octave)
• CEA-2006 compliant amplifier
• Frequency response: 11-330 Hz
• Efficiency: 85 dB
• Dimensions: 14-3/4"L x 9"W x 2-11/16H

<TABLE><TBODY><TR id=tg1><TD class=NormalSmall><NOBR>Warranty: 1 Year Onlinecarstereo.com warranty.</NOBR></TD></TR><TR style="DISPLAY: none" id=ag1><TD class=NormalSmall bgColor=#ffffcc>1 Year warranty from Onlinecarstereo.com implies that repairs must be returned to Onlinecarstereo.com, not the manufacturer. More information can be found in our help section under returns & warranties. </TD></TR>******** language=javascript type=text/javascript> <!-- var qq = document.getElementById('qg1'); if(qq != null) qq.style.display = "none"; document.getElementById('ag1').style.display = "none"; //--> *********></TBODY></TABLE></TD></TR></TBODY></TABLE>

 

i would double check...

that amp is not enough for ur sub if ur looking for 4 ohm

 

Might be over-kill but I believe in over-kill and allowing room for expansion. IF you have the space for it, and in the future may upgrade to a bigger system.
$195 for the Nine.1 Regularly $365.
Elemental Designs

You most likely would never need another sub amp if you ran this @ 4 Ohms.

RMS Power @ 12.5v :
450W x 1 @ 4 Ohm
900W x 1 @ 2 Ohm
1200W x 1 @ 1 Ohm

<TABLE cellSpacing=0 cellPadding=3 width="100%" align=center bg*************** border=0><TBODY><TR><TD width="50%" bgColor=#cccccc>Height : 2.250"</TD></TR><TR><TD width="50%">Width : 9.850"</TD></TR><TR bgColor=#cccccc><TD width="50%">Length : 15.875"</TD></TR><TR><TD width="50%">Overall Length(w/ feet) : 17.175"

<TABLE cellSpacing=0 cellPadding=3 width="100%" align=center bg*************** border=0><TBODY><TR><TD width="50%" bgColor=#cccccc>Signal to Noise Ratio </TD><TD align=right width="50%" bgColor=#cccccc></TD></TR><TR><TD width="50%" bg***************>Variable Input Sensitivity </TD><TD align=right width="50%" bg***************></TD></TR><TR><TD width="50%" bgColor=#cccccc>Remote Variable Input Sensitivity </TD><TD align=right width="50%" bgColor=#cccccc></TD></TR><TR><TD width="50%" bg***************>Variable Low Pass X-Over </TD><TD align=right width="50%" bg***************></TD></TR><TR><TD width="50%" bgColor=#cccccc>Variable High Pass X-Over </TD><TD align=right width="50%" bgColor=#cccccc></TD></TR><TR><TD width="50%" bg***************>Current & Thermal Protection </TD><TD align=right width="50%" bg***************></TD></TR><TR><TD width="50%" bgColor=#cccccc>Remote Gain Control </TD><TD align=right width="50%" bgColor=#cccccc></TD></TR><TR><TD width="50%" bg***************>Variable Phase Control </TD><TD align=right width="50%" bg***************></TD></TR><TR><TD width="50%" bgColor=#cccccc>Master / Slave Option </TD><TD align=right width="50%" bgColor=#cccccc></TD></TR><TR><TD width="50%" bg***************>Efficiency </TD><TD align=right width="50%" bg***************></TD></TR><TR><TD width="50%" bgColor=#cccccc>Variable SubSonic Filter </TD><TD align=right width="50%" bgColor=#cccccc></TD></TR><TR><TD width="50%" bg***************>Fuse(s) </TD><TD align=right width="50%" bg***************></TD></TR><TR><TD width="50%" bgColor=#cccccc>Max Current Draw </TD><TD align=right width="50%" bgColor=#cccccc></TD></TR><TR><TD width="50%" bg***************>Damping Factor</TD><TD align=right width="50%" bg***************>300</TD></TR><TR><TD width="50%" bgColor=#cccccc>Warranty</TD><TD align=right width="50%" bgColor=#cccccc>5 Years</TD></TR></TBODY></TABLE>
</TD></TR></TBODY></TABLE>

 

YA those are awesome amps..

 

"Please Note: The Pricing Offered Currently is Pre-Production Pricing. These Units Will Ship When They Are In Stock."

I poked around a bit but didn't see an estimate as to when they were going into production. Any idea?

 

The sub is 2 ohm, I'm apparently a moron when it comes to the multi-meter. Sure looked like 4 to me.

Anyway, I snagged a 500w mono Rockford Fosgate new in the box, not refurbed, for under $140. The test card it came with shows it at 542 RMS at 2 ohm. I hooked it up and it sounds at least as good as the MTX it replaced, but I need to tinker with the settings a bit to get it dialed in.

Now I need to get it permanently mounted. Its about 5" longer than the MTX and doesn't fit on my mounting board under the rear seat. I mean, it fits under the seat but the board isn't long enough to screw down both sides so it would flop around.

 

glad u at least have it working