and since some of y'all already know that I buy only the best I'll let the rest of y'all know what the best really is. After months of listening, studying, and deciding between MB Quart, Morel, Focal, and Polk. today is the first time i ever got to listen to the Polk Audio Signature Reference SR6500 speakers and i was absolutely blown away. a set of focals were sitting side by side with these sr's and it really made me disappointed in focal sound quality. you really need to listen to a pair of these to appreciate the beauty.

here's an article on the speakers.

http://www.caraudiomag.com/testreports/0511cae_polk_audio_sr6500_car_speakers/index.html

10/17/2008 6:53:47 PM

the best speakers in the world wont bring back my hearing

10/17/2008 9:37:22 PM

in my experience with high end audio once you get past about the $500 or so retail mark the emphasis shifts to the install in terms of performance. i.e. a 500$ set installed, deadened and tuned properly could destroy a 1000$ set.. . that said i wouldn't mind taking a listen when you get those puppies in i've heard nothing but good stuff about them. and let me know if you need an amp to run them. my treo engineering amps should run the set with plenty of head room

[Edited on October 17, 2008 at 11:04 PM. Reason : .]

10/17/2008 10:58:21 PM

^yeah, it's going to take a while before i get them in. i still have to buy the rest of the stuff. i'm keeping it simple yet the sq should be amazing. the speakers retail for $750 but tweeter has them on closeout for the new model getting ready to come out. i got the guy to sell them to me for $350! my dad, who's an electrical engineer, has all the meters and shit needed to measure the sound so we'll be able to properly set the eq curve and determine the proper mounting location and direction so the time delay will be in check. ill probably just get some polk co-axles for the rear fill. ill have an alpine pdx150.4 powering the full-range speakers and an alpine pdx600.1 powering the 2 10's which will be in a downfire box.

10/18/2008 9:45:45 AM

Quote :

"co-axles"

10/18/2008 3:13:34 PM

you like that shit, don't ya?

10/18/2008 5:11:40 PM

Dude...know of anybody might want an old school Rockford Punch 45HD amp? I hate to get rid of it, but I don't know what the hell I'm gonna do with it.

10/18/2008 6:33:44 PM

^ how much you selling it for?

NOOOO don't run the pdxs for sq they are AWFUL. well not awful but they are bad enough to really negatively affect the sq of a set like that. it has to do with the way alpine did the full range class d. everyone i know who's ran a pdx has been really happy with the size but really unhappy with the sq. like i said it's not terrible but compared to a decent a/b the sq is just not there. honestly a much better option if you want small and powerful is the ks series from arc. they are class g so they are just as efficient and almost as small but still as the a/b sq.

[Edited on October 18, 2008 at 10:35 PM. Reason : .]

10/18/2008 10:29:38 PM

I might be interested in that amp, send me a pm.

10/19/2008 12:46:41 AM

Hey, Brian, what you think my Punch is worth?

10/19/2008 3:53:47 AM

id say 150

10/19/2008 10:30:39 AM

id really say it depends on who ya sell it to. if the persons a collector it's worth a lot more , if the person is gonna use it they can get a new amp with similar power for less than a hundred bucks or so.

10/19/2008 1:41:44 PM

Quote :

"NOOOO don't run the pdxs for sq they are AWFUL. well not awful but they are bad enough to really negatively affect the sq of a set like that. it has to do with the way alpine did the full range class d. everyone i know who's ran a pdx has been really happy with the size but really unhappy with the sq."

wtf ever. my guess is everyone you know who's ran these amps really doesn't know shit about sq. i've read a lot of articles about these amps and they get rave reviews for sound quality. i know a few people personally has chosen them over zapco and mcintosh. do i think they are as good as it gets? no. do i think they produce a pure signal like a true class a amp? no. but do a dollar per watt comparison against these other amps that the only difference in sound quality is only shown on a meter and you'll agree that these amps are the way to go.

10/19/2008 2:07:42 PM

cars are so noisy by nature i see no reason not to go class d

10/19/2008 2:13:50 PM

the sound of the engine is music to my ears.


you fags

10/19/2008 3:57:37 PM

wtf ever is right... anybody who picks a pdx over a McIntosh or zapco saying the sq is the same either works for alpine or just don't wanna admit they can't afford to buy the sq. if you listen to the pdx next to a decent a/b amp u'll hear how the pdx amps lack detail in the mid-lower frequency ranges which is how they are so small/efficient.i've even had people who sell alpine shit in their shops admit it. i'm not an alpine hater ( still running an alpine hu) and i'm not one of those weirdos who say u can hear the difference a/b vs d on subs. plain and simple most people love their pdxs amps, they are efficient, underrated and they are a good value, but if EXCELLENT sq is the goal of this setup which i assume it is with a 1000$ component set i'd look into some different amps.
http://www.diymobileaudio.com/forum/showthread.php?t=46703&highlight=pdx first few post talk ab pdx sq

http://www.mobileelectronics.com.au/forums/index.php?showtopic=541185 guy compares pdx to focal amps

10/19/2008 5:14:31 PM

^man, the links you gave have no credibility to them at all. they are message boards. we don't know who those fucksticks are and what they know. that's like someone linking to this thread and taking my word about how great these amps are or your word about how they suck ass. besides, seems to me like they are arguing about the same thing we are. some are saying they're garbage for sq while others are saying you won't tell a difference.
i mean, just look at some of these quotes:

The Negatives:

Quote :

"However.. they are hopeless in sound performance compared to my Soundstream A/B class amps"

Quote :

"I did note that the PDX's didn't sound too bad if you ran then at 8 ohm. "

really? comparing soundstream to alpine pdx? i could understand if this was 1995 when soundstream was worth a damn. and if he knew anything about a class d amp he would know that impedance doesn't change output.

Quote :

"This is all e-say, but from what I have read up on, the main advantage is size with those amps, not SQ. I have read reviews that they flatten up top, and I think someone on here reviewed a PDX amp and stated that they are loud, and that is about it. I have never owned or ran any class D amp's, just a/b's so I can't tell you for sure."

like he said, it's all e-say.

Quote :

"I'm running an Alpine PDX on my fronts now. I do enjoy the top end, it's very clean, but the midrange and down is disappointing. I really don't enjoy it and can't wait to go back when I find something else. Unfortunately the PPI that I was running before, died."

is his shit set up correctly?



The positives:

Quote :

"I remember seeing a few discussions about this already but cant remember how they started. Basically there are no audible differences for the most part. some people will give their opinions. There have been many SQ winners using the full range class D technology if that means anything to you. I am running the eclipse version myself and I love it."

Quote :

"Class D amps are all the rage in the home world and have been doing damn well in car audio as well. "

Quote :

"Multi thousand dollar audiophile grade home subs built for stereo reproduction reviews as sounding excellent all the time use class D amps. Thats all I need to point me in the class D direction"

i posted those quotes just so you'll see that it's been a big debate for a while now. i also think we are hitting on the same lines so we are arguing about nothing. i already said they are not the cleanest amps available. hell, my original design called for audison vrx amps. but what you need to understand is i also like to look at the dollar per watt value. these amps are spot on for all-around value. i did get to compare the audison amp vs. the alpine pdx amp in person on a set of focal speakers and could not tell a difference.

the fact of the matter is the pdx amps are clean enough to be comparable to the audison when using a human ear. if you use a RTA then, of course, you'll be able to tell a difference. but when would i, or you for that matter, ever hook up an rta to show off how clean an amp is? never. will i use an RTA to properly set up the system? yes. but i promise you you wouldn't be able to tell any sq difference between the two amps just by listening.

10/20/2008 3:03:41 PM

if you aint got DOGG DIGITAL, you are NOT pimpin'!

10/20/2008 3:30:01 PM

impedance doesn't effect output??? even though they are regulated to put out the same power current draw & heat will flucuate and effect output. output never drops below the ratings but it will change with impedance. more than likely u heard those 2 amps side by side on a 12v demo board which is so far from being a good install it's not funny. what was the source you listened to? more than likely it was an mp3 disc or ipod. like i said they aren't horrible but if you're going all out on the components why feed them regular instead of premium?

10/20/2008 6:17:11 PM

Quote :

"but if you're going all out on the components why feed them regular instead of premium?"

same reason it's a waste of money to put premium gas in a car that requires regular. you won't tell a difference!

and on the birth sheet it's rated at 633x1@4ohm and 633x1@2ohm.
as for source, i listened to the radio, an iasca test disc, and one of my cd's. obviously the speakers will sound different when installed in my truck but i would still be able to tell a difference between the two amps even in a demo room if there were a difference to be heard.

10/20/2008 9:30:06 PM

i could understand u saying that if you were running some polk dbs andfollowing your same logic why not get some cheaper kenwood or lanzar class ds amps? either way hit me up when you get em in .

[Edited on October 20, 2008 at 9:49 PM. Reason : .]

10/20/2008 9:46:44 PM

why would you want to listen to such awesome speakers powered by such shitty amps?

10/20/2008 10:01:04 PM

^ agreed.

10/21/2008 12:46:12 PM

Signal to Noise (S/N): 100dBA (Reference to Rated Power)

A McIntosh MCC406M S/N 105dBA

CEA-2006 Power Rating (40hm@14.4V = 1%THD+N), S/N 78dBA

so by the CEA their S/N sucks... I'm a little confused as to how all that goes down... I don't have time to research it though...

but if it's pulling a 78dBA SNR that's tape deck quality... if it's putting out 100dBA then yeah it's comparable to the Mac

[Edited on October 21, 2008 at 3:57 PM. Reason : stupid manufacturer spec's... people distort numbers all the time]

10/21/2008 3:47:57 PM

i never said they were shit and i enjoy car audio enough to listen to any decent setup.

10/21/2008 10:15:13 PM