28 replies to this topic

[master_luke]

hmmm id be getting the two G5's on the side walls of the boot inverted, and have a custom amp rack in the centre of the boot that houses the two amps

[sweep77]

yeah thats pretty much what i was thinking. the difficult part is trying to fit the second amp between the subs.

[master_luke]

you might have to "angle-stack" the two amps so as they fit.

Again some intense custom work is required...

How handy are you with fibreglass?


alternatively you can get a hybrid 5 channel amp, such as the Memphis Belle MCD-1300

4x75WRMS of ClassA/B
and 1100WRMS @ 1 ohm on the 5th channel Class D

Edited by master_luke, 27 September 2006 - 11:04 AM.

[Juls]

tyroneair, on Sep 26 2006, 09:13 AM, said:

Congrats on deciding on your amp sweep77, just to add to the comment of the PDX amps not being sq orientated is false from my understanding, a quote from Car audio and electronics magazine.

http://www.caraudiomag.com/0607_cae_alpine...ier/index2.html

"Alpine conservatively states the frequency response to be 20Hz to 20kHz, but I measured it to be 5Hz to 32kHz at –1dB, very impressive for a Class D amplifier. In fact, the marketing guys at Alpine are not fond of the Class D moniker due its past limitations on frequency response and sound quality. This amplifier could pass for a really good A/B design, except that it is small and efficient."

Just for anyone who’s interested, the review could be biased but I like the sound of mine.

Slew rate of 7uV and damping of 80....

a SQ Amp would be rated at around 30-50 + UV Slew, and 300-600 + Damping.

the +/- 1db 20 to 20 is nice.. and 100db is nice too.
but only for small speakers, High volume high freqs could be a issue.
as well as midbass performance would be lacking.

Looks like they would make a fantastic Midrange Amplifier though.

Juls

Edited by Juls, 27 September 2006 - 01:55 PM.

[SCorpion]

Juls, on Sep 27 2006, 01:41 PM, said:

Slew rate of 7uV and damping of 80....

a SQ Amp would be rated at around 30-50 + UV Slew, and 300-600 + Damping.

the +/- 1db 20 to 20 is nice.. and 100db is nice too.
but only for small speakers, High volume high freqs could be a issue.
as well as midbass performance would be lacking.

Looks like they would make a fantastic Midrange Amplifier though.

Juls

class D amps shouldn't be measured in the same way as class A/B. hence why the stats seem way way low. they probably measured the class D's the same as class A/B for conformity

[Juls]

SCorpion, on Sep 27 2006, 12:32 PM, said:

class D amps shouldn't be measured in the same way as class A/B. hence why the stats seem way way low. they probably measured the class D's the same as class A/B for conformity

Yes I agree,
although the Slew Rate is measured no different,
it's damping factor that shouldn't be measured the same way,

however the reviewer mentioned a lack of midbass control, which indicates that the low Damping factor reading given was still relatively accurate.

Juls

[SCorpion]

Juls, on Sep 27 2006, 03:46 PM, said:

Yes I agree,
although the Slew Rate is measured no different,
it's damping factor that shouldn't be measured the same way,

however the reviewer mentioned a lack of midbass control, which indicates that the low Damping factor reading given was still relatively accurate.

Juls

true, but i always wonder if they are listening with their ears or with the stats. dont forget that the TacT millenium is often used as THE reference amp by alot of ppl and that is a full range class D amp aswell.

i think im just suspcious of 'reviews' that include new 'controversial' technology. is it really a lack of midbass or is it his head telling his ears its a lack of midbass??

i dont know, i haven't listened to them.

[Shreknos]

tiny boot man... mine is similar in the new swift...

were trying to get three amps in there, ha to resort to one under the passenger seat, lucky it was a smallish amp...


the other two barely fit ontop of 4.5 cubes of box...


dont kid yourself, buy the pdx amps, or something similarly small...

i used to be skeptical about these amps, but when it comes down to either getting everytinhg in and sacrificing some sq, or not fitting everything at all, i would choose the pdx's..

[roughcactus]

I was very sceptical of the PDX range until i installed one and spent some time listening to it...bloody impressive amps...huge power in small package, very clean and built like tanks...What more could you want?

[DG Phil]

roughcactus, on Sep 28 2006, 07:20 PM, said:

I was very sceptical of the PDX range until i installed one and spent some time listening to it...bloody impressive amps...huge power in small package, very clean and built like tanks...What more could you want?

More power

Phil

[sweep77]

the DD s4 should have plenty for what i need and its not that big either.

[~thematt~]

Both the Milbert and the Butler TD Blue have damping only around 15-20, and both are esoteric (one more then the other obviously) amps. When it comes to specs, they dont tell the whole story. I think damping is starting to become the new 'max power' slogan.

[DG Phil]

~thematt~, on Sep 29 2006, 10:11 AM, said:

Both the Milbert and the Butler TD Blue have damping only around 15-20, and both are esoteric (one more then the other obviously) amps. When it comes to specs, they dont tell the whole story. I think damping is starting to become the new 'max power' slogan.

Well said.

I used to have arguments with people who'd come into my shop debating which CD player to get, because one had 0.0004% distortion and the other 0.0007%.

Phil

[fuddbutter]

^^^^^^ i agree!!


never look at the spec's, listen for them with your ears.