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Amplifier choice for 2 Alpine Type R


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Flakman 
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Posted: August 08, 2006 at 10:07 PM / IP Logged  

nouseforaname: Agreed. The only thing to match tuning, would be the enclosure!

customak47: Yes, if you pay the money now, you can snatch the spl pebble from my hand tomorrow. Amplifier choice for 2 Alpine Type R - Page 2 -- posted image.

The Flakman
I feel strange. I have deja vu and amnesia at the same time.
John | Manteca, CA
aznboi3644 
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Posted: August 09, 2006 at 1:50 AM / IP Logged  
Memphis 1000D will work nicely...my best friend has one wired up to two Kicker 15 L7s at 1 ohm and it doesn't even get that hot...after some hard playing its only warm to the touch...I'm not sure why but these amps don't even get that hot.
forbidden 
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Posted: August 09, 2006 at 2:39 AM / IP Logged  

Alright you guys, here is my advice, take it how you like.

You have some respectable subs. If you are looking to run them properly, this tells me that you are wanting to play them loud and proud (not a statement related to JBL from what, 15 years ago either). The two amps posted above are class AB amps. The PDX that is being talked about is class D.

Consider that a good class AB amp may be 55% efficient, where did the other 45% go. For 1000 watts of input power you get 550 out as usable tunes, the other 45% is where? Jus like ingredients listed on a box that goes from most to least, you have heat and then power used to make the amp operate.

Now consider a class D amp that is say 80% efficient. 1000 watts of power in and 800 out in the form of usable tunes. Now in day to day use the amp will draw less current and produce way less heat. In all out use, 1000 watts of power out of any amp is going to draw the same amount of current but the heat signature of the two types of amps will be wildly different. The class AB is going to be hot enough to barbeque a steak on (mmmmm steak), the class D is going to be much much cooler. So, when faced with two subs, a person who wants them to play like they are meant to and the amp is installed in a confined space with improper cooling, the class D amp is the better choice.

If you are able to hear a difference in tonal response of a sub operating at 1 ohm vs. 4 ohm, well, your ears are either way better than mine or mine are just toast.  Nothing wrong with 1 ohm at all provided the amp is designed and engineered to operate there.

The PDX is a ICEpower design amp, one of the IMO better class D amplifiers on the market today. Eclipse of course makes a ICEpower amp as well, but, if you think the Alpine is expensive, the Eclipse is up from there. Keep looking and pay attention to the multitude of class D 1 ohm mono amps on the market today. Concept, Exile, Rockford, MTX, Alpine, Memphis, you name the brand there is going to pretty much be one. Consider your budget and then we can aid you to zero in on the amp that may suit your needs the best.

Top Secret, I can tell you but then my wife will kill me.
Flakman 
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Posted: August 09, 2006 at 11:47 AM / IP Logged  

Great info as always, Rob.

The Flakman
I feel strange. I have deja vu and amnesia at the same time.
John | Manteca, CA
530ibmw 
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Joined: August 07, 2006
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Posted: August 22, 2006 at 5:42 PM / IP Logged  

Thanks for all of the replies, I apologize for the delay, doing some Transmission work on the car.

Thanks alot Rob also. ALl the info I needed to hear!

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