53 replies to this topic

[vifa]

Hello everybody.

I in the market for a 4 channel amp to run the fronts and a sub.

front: 6.5" MB Quart PSD 216. rated 60-120Watts, not sure if is RMS or Peak watts.
Sub: JBL 12" 200 watts RMS

The Alpine PDX 4.150 and MVR-F545 is what i have in mind. I really like the PDX for is size.

The questions is will the PDX amp which is a Class D amp sound cleaner than the V12 F545 ?

I always see Class D amp used for subwoofers.

Alpine a Stated the THD for the PDX is <=1% THD+N. where the F545 is 0.08THD.

can someone pls pls help me out here.

cheers..

[Terebro]

I had this amp installed in my system last weekend.

Im no expert, but I know that Im extremely happy with it.

I have used it to run an active setup on a pair of Phoenix Gold Xenon splits, off a Eclipse CD7000 HU.

As to whether it will sound cleaner - I have no idea.

[shiny_car]

ignore the specs, and listen with your ears. from all reports, the PDX series is exceptional. this shouldn't surprise you, cos alpine would not position them above the V12 range if they were not superior.

i'm yet to see and hear them myself, but they look exceptional in all regards.

[vifa]

Thanks Shiny Car you are never too far away from an answer.

I will take a punt and get a PDX instead of the V12.

[Shreknos]

just something to be weary, though the size and power is nothing to be argued with by any other manufacturer, they are full range class D, id have a listen first if possible, as iv heard nothing but bad things about full range class D, id personally go with the V12 A/B design...

Edited by caydin, 19 June 2006 - 12:57 PM.

[shiny_car]

caydin, on Jun 19 2006, 12:56 PM, said:

id have a listen first if possible, as iv heard nothing but bad things about full range class D, id personally go with the V12 A/B design...

i guess neither of us are really in a position to say - cos we haven't auditioned them - but i've read the feedback from at least 2 industry members here who have heard these amps. they have the quick and easy ability to compare them with the V12 amps on demo boards, and have no doubt spent many, many hours with alpine gear; far more than you or i quite possibly.

their feedback was extremely positive, suggesting the PDX amps are superior to the V12's. i think that counts for something.

again, don't let the specs or theory dictate the decision. indeed, audition first...

[roughcactus]

Somebody I work with actually sat in our demo board for 45 mins last week just listening to the PDX's...and he was stunned...so much so he raved on to me about it...which he NEVER does...so I take that as a pretty good endorsement. I'm supposed to take a few favourite cd's and check em out myself and will when I have the time...but for now the feedback has been very postiive

[Terebro]

I have both the PDX 4.150 and PDX 1.1000 - very happy with both.
All I need now is some IDMAX10's!!

[MADTRAV]

caydin, on Jun 19 2006, 02:56 AM, said:

just something to be weary, though the size and power is nothing to be argued with by any other manufacturer, they are full range class D, id have a listen first if possible, as iv heard nothing but bad things about full range class D, id personally go with the V12 A/B design...

Is this a statement based on an assumption????? Listen to them, they sound fantastic, just because someone has stated that class d can't sound any good, doesn't mean its true, i'd agree that all early attempts at class d full range were pretty average, but these need to be heard!!!!
Alpine is not a company to do a half job at making an amp, those others are, if it wasn't as good as the v12 they would've badged it a v power!!

[Chich]

Terebro, on Jun 19 2006, 04:32 PM, said:

I have both the PDX 4.150 and PDX 1.1000 - very happy with both.
All I need now is some IDMAX10's!!

These are the two amps i'm considering at the moment. Good to read positive reviews!

[vifa]

alpine stated that the PDX amp have 350% greater damping factor than a conventional A/B amp.
Have spoken to a few audio shop and their opions were PDX is a better amp to buy for a $100 bucks differences.
I have orderd the PDX already and will get the gears installed next monday..
I will let you guys know the results.

thanks to everyone who replied.

cheers

Edited by vifa, 19 June 2006 - 07:19 PM.

[~thematt~]

caydin, on Jun 19 2006, 10:56 AM, said:

just something to be weary, though the size and power is nothing to be argued with by any other manufacturer, they are full range class D, id have a listen first if possible, as iv heard nothing but bad things about full range class D, id personally go with the V12 A/B design...

I bet you $10,000 american dollars, that with those two amps and one on EQ (plus all the other gibberish) that you couldnt tell the difference.

[vifa]

Alpine's RRP

PDX-1.1000 (1000wrms x1) $1099
PDX-4.150 (4x150wrms) $899
PDX-2.150 (2x150wrms) 699

[Juls]

My only worry with the PDX is no doubt they are dual or tripple layer PCB Design,
which means if they fail, forget getting them repaired. They will be irrepairable.

the thing I love about my soundstream hand made amps, is if something stuffs up it's so easy to fix.
you open them up, and it's all openly layed out, cleanly tidy, with full size components all soldered on.

I'm prepared to put up with them taking up more space, to have the piece of mind if i do something silly, i can fix them.

I've got a rockford at home I stuffed up, one of the 5 channels I killed by shorting it out,
the amp was worth $900, I got quoted $600 to "attempt" to repair it, but no garantees because it's
dual layer PCB Machine made. I still had to pay the money if they fixed it or not.
pretty much they couldn't repair them and basically put a figure on it to scare me off.

I'm sure the PDX Sound fantastic, they are nice and small too. which is great.

Juls