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Old 10-17-2001, 10:55 AM   #1
Teh Legacy
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Default Let's talk amps....

I know this is a pretty generic question, but here we go...
I currently have 2 MTX Thunder 8000 12" subs.
What amp should I get for about 200$ that will not only hit hard, but also sound clear? I'm on a pretty stiff budget right now, so I have to really get a good deal.
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Old 10-17-2001, 11:53 AM   #2
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Try to sell off one of the subs and make a little more money. $200 won't get you that far if ya want a decent amp (especially if you have to power two subs). Besides, you should get some decent bass outta a single 12. There was a site, www.thezeb.com, I think. It had some pretty good stuff relatively cheap. I would personally go with a precision power amp. I've had pretty good experiences with them.

Someone else chime in here.

Jason
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Old 10-17-2001, 12:05 PM   #3
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You could get a Profile amp. The watts per dollar value is not at all that bad.

Also check out ebay for some deals, you may just win a bid for a decent amp.
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Old 10-17-2001, 01:40 PM   #4
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I agree with Jason. Sell one of the subs and buy a better amp.

Or, check the private clasifieds. A guy is selling a nice RF amp for $225 that would do nice with two 12" MTX's.

Chad
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Old 10-17-2001, 02:01 PM   #5
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$200 isn't a whole lot for an amp to power 2 12"s. you may have to save up alittle more or check ebay for something. i usually get phoniex gold amps.
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Old 10-17-2001, 02:09 PM   #6
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$200? alpine makes decent v12 amp @ that price...

if you wanna save $ and still have good sound i would sell one of those subs and put the $ toward a bigger amp.
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Old 10-17-2001, 02:14 PM   #7
2.5GT
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I was originally intending to use it, but now I'm thinking of selling it off. I have an Alpine MRV-1000 that's just kickin it in my basement. It's rated at 100x2 or 400x1 but its birth certificate said it put out 117x2. Haven't used it in a year. I'll check it out, make sure it works . . If it does, I'll be willing to sell it.

Jason
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Old 10-17-2001, 02:26 PM   #8
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I don't know why you say you need a HUGE powerful amp. Anything that does 150RMS is fine for most applications. Unless you want to win a few SPL competitions. With just 150RMS watts, you could easily do 110db, which is plenty loud.
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Old 10-17-2001, 03:27 PM   #9
2.5GT
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mitch808, you're not being specific to the type of sub. Sure, some subs can take smaller amouts of power and sound decent (those with higher efficiencies) but if I'm not mistaken (and I might be), the mtx thunder8000's require a little more power (especially if you're driving two of them!). If you underdrive the sub (and just crank up the gains) you risk blowing the voice coil.

I'm just saying that he doesn't need two subs and would prolly benefit more from selling off one of the subs and getting a better amp instead.

Jason
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Old 10-17-2001, 03:40 PM   #10
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Quote:
Originally posted by 2.5GT
mitch808, you're not being specific to the type of sub. Sure, some subs can take smaller amouts of power and sound decent (those with higher efficiencies) but if I'm not mistaken (and I might be), the mtx thunder8000's require a little more power (especially if you're driving two of them!). If you underdrive the sub (and just crank up the gains) you risk blowing the voice coil.

I'm just saying that he doesn't need two subs and would prolly benefit more from selling off one of the subs and getting a better amp instead.

Jason
Cranking gains does nothing for wattage output, in fact people who do that should get shot as they no nothing about car audio. All your doing is increasing the chance of clipping and distortion, trying to make up for a weak amp.

But like I said earlier. 150RMS roughly 300-400peak watts per channel amp would be sufficient. It would give you well over 100db. Keep in mind that the acoustics of a car boosts bass output up to 12db.

The MTX subs are rated for 400 RMS. So now here we are putting in slightly less then half the recommended wattage and you know what we are going to get? Come on I know you know this... -3db That's it roughly 3db less in output with 150RMS watts when compared to 400watts. Each time you double the wattage you get efectively +3db more output. It takes some 10db's to effectively double the sound output(to the human ear). So that would work out to well over a kilowatt of power in this case to double the sound output.
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Old 10-17-2001, 03:42 PM   #11
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On a side note though, your right, two MTX8000's must be HUGE in the trunk. I would rather have just one unless your going for boom and not concerned about trunk space. Or sell em both for a little more and get something else new and better. Infinity perfects can be had for 135 each on ebay and 155 for 12" on ebay. Those are nice sounding subs
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Old 10-17-2001, 04:02 PM   #12
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I agree with what's been said already. You are not going toget a good amp for that $$$ that will do what you want. And, no. profile is NOT a brand that I would recommend. I used to sell them and I would look at something else first. What you need to do is get an amp that will run one speaker and save for the same amp to put on the other spkr later. This way you can at least get something decent for your $$$. They are several amps for $200 before tax that would fall at the bare minimum for running one of your spkrs. But nothing will push both like I think you are looking for. Remember that you don't want to skimp on the quality of your amp. It's like giving a weightlifter big muscles and them giving him a chimp's heart. He's gonna ned a big, strong heart to pump blood to his huge muscles, not a little monkey heart! Just like big, strong spkrs need a good amp to pump the power to them. And I don't mean this literally. Don't go out and buy an amp cause it looks big... All sorts of companies are out there that have been known to put dead weight in their amps to make them seem big and powerful, but they really weren't!
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Old 10-17-2001, 04:52 PM   #13
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Quote:
Cranking gains does nothing for wattage output, in fact people who do that should get shot as they no nothing about car audio. All your doing is increasing the chance of clipping and distortion, trying to make up for a weak amp.
That's what I said, or at least tried to say (kinda hard when you're when you're at work and have to switch between windows - shhhhhhhh).

Quote:
But like I said earlier. 150RMS roughly 300-400peak watts per channel amp would be sufficient. It would give you well over 100db. Keep in mind that the acoustics of a car boosts bass output up to 12db.
True, as long as the amp puts out 150 CLEAN, UNDISTORTED WATTS. The idea is to decrease the amount of distortion. Like you clarified, people tend to turn up their gains in order to compensate for a lack of power. I don't recommend this. I'm just trying to nail down the idea that he needs to get a better quality amp rather than going with two subs and a so-so amp that will clip and distort.

Don't worry, I'm not disagreeing with you. I think we're pretty much arguing the same point (in which case we're not aguing).

Quote:
It's like giving a weightlifter big muscles and them giving him a chimp's heart. He's gonna ned a big, strong heart to pump blood to his huge muscles, not a little monkey heart! Just like big, strong spkrs need a good amp to pump the power to them.
Good analogy.

Jason
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Old 10-18-2001, 01:42 AM   #14
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My advice:

Wait. Save up some more dough and buy a good amp with sufficient power. Otherwise, your subs will not sound nearly as good as they could.

My sub/Amp set up:

Kicker 12'' Solo Baric in a sealed box powered by a Kicker 360 Amp tested at 620 watts of actual power when run in stereo to both voice coils.

My sub would sound bad if I underpowered it. It would be a woofer, not a subwoofer.
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Old 10-19-2001, 12:57 AM   #15
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I agree with the others in that $200 isn't a whole lot for an amp. Zebaudio sells a nice MTX class D for around $220 thats good for 375x1. MTX amps are usually underrated and you should check it out.

If you didn't have those 2 subs yet I'd say get a JL12w3 and put it in a ported box. Lots of clean sound for very little money and it's very efficent.

*edit*
I just read jacobhorn's comment. Dude...don't kill your woofer. Just brigde the amp and run it in mono. Running a DVC with a different channel on each coil is plain dumb. Just run your woofer in series for a 2ohm load (I think, not sure about kickers).
*edit*
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Old 10-19-2001, 03:09 AM   #16
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Cant get a good amp for that much huh?

How about a Zapco Studio 100x Rated at 200w RMS bridged @ 2ohms with crossover(x).

RETAIL = $500
Zeb = $170

http://thezeb.com/caraudio/zapco.html
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