I'm gonna have two 10" Xtant x104's installed, 500rms each (2000max each), impedance at 4ohm. Now its time to add some juice to them.

I was looking at a Quantum Cozmik Amp 3000 Watt QCA3000D

The specs are as follows:
3000W max
1000W x 1 @ 2ohm
2000W x 1 @ 1ohm

What do you think? Any suggestions on other amps?
Anyone have subs in their 97-03 Standard cab? Is there anywhere to mount the amp (est. dimensions 12x16x2) other than the back wall?

Any input is greatly appreciated!

 

I think your nuts.

the MAX rating is not to be paid attention to at all. It's nothing but a misleading tactic used by low life companies to steal your hard earned money. If you ever see MAX ratings divide by 2 and shop for a different product.

I've never heard of those subs or amps but at least they do have a presence on the web unlike TiS. Anyone?

 

Xtant used to make some really good amps. Maybe they still do. Don't know much about their subs, though.
Their website says the X104 is a single voice coil 4Ω. Two wired in parallel will give you a 2Ω impedance, so that's the rating you want to watch. 500 each means you'll want an amp rated at around 1000 watts rms at 2Ω. Can't say I've read much about Quantum. Might want to check out Kicker, Memphis, Hifonics, JBL and if you want to splurge Zapco, Arc Audio, Audison.

 

Actually, the MAX rating is important - it demonstrates the headroom of the amp in question. What one has to question is the measurement method used to determine the power ratings. With a reputable company, MAX power would be listed as "Dynamic headroom or headroom", usually listed in db's. Any manufacturer of quality amplifiers usually includes the headroom spec in their listings. An amplifier with 3db of headroom can output twice the RMS rated power without significant distortion.

I went to their web site and, after reviewing their specs, decided I would pass on buying an amp from them:

1. Output power is not rated RMS, with a specific input voltage, within a specific frequency range. This is typical of amplifiers that do not conform to established measurement standards. Here is an example of a high quality amplifier power rating:

POWER OUTPUT
2000 watts into an 8, 4, or 2 ohm load is the minimum sine wave continuous average power output.
The output RMS voltage is:
126.5V across 8 ohms
89.5V across 4 ohms
63.3V across 2 ohms


2. The S/N ratio is not high enough for my taste, although for driving a subwoofer it would be fine (S/N ratio is basically how quiet the amp is - any noise will show up through high frequency drivers, not subwoofers). S/N ratio is a good indicator of the power supply quality - better designs / components yield an inherently "quieter" amplifier. Here is an example of a high quality amplifier S/N listing:

A-WEIGHTED SIGNAL-TO-NOISE RATIO
Unbalanced: 90dB (123dB below rated output)
Balanced: 94dB (127dB below rated output)


3. No mention of slew rates, intermodulation distortion, etc.

INTERMODULATION DISTORTION
0.005% maximum, if instantaneous peak power output does not exceed 4000 watts, for any combination of frequencies from 20Hz to 20kHz.

BTW - Good quality subs, installed in a properly designed enclosure, are 1000 times more important than trying to buy the most powerful amp you can find. You would be better off with a good sub/enclosure combo powered by a higher quality amp, IMHO.

 

B-Man, thanks for the info...I can't say that I necessarily grasp all that information, as you see from my first question...I'm no pro in the audio department. So, if you were to install 2 10's and an amp in your lightning...what would you use?? Thanks to everyone for their patience.

 

Well, I have 2 - 10" MB Quart subs in a MTX enclosure designed for the regular cab F150.

I am powering them with a Rockford Fosgate amp - I have to say, however, that my amp selection was based more on physical size than any other parameter. I wanted it to fit under the power driver's seat, which was no easy feat...

If you want your bass REALLY loud, you will want more power than I am running. For my musical taste and listening levels, it works just fine.

Make no mistake - my system will play crystal clear and loud enough that you cannot hear my loud exhaust, or people screaming...

 

alright cool, thanks for the advice.....I too will want to put the amp under the seat, so I'll definitely need to consider that measurement when purchasing...I'm gonna go with quality over quantity when it comes to watts...thanks again B-Man