Page 4 of 8

Re: PMC

Posted: Wed Jul 01, 2020 7:00 pm
by Firebug1
Here is pic of Finnish hifi enthusiast PMC Fenestra set up... :-?

Re: PMC

Posted: Thu Jul 02, 2020 9:23 am
by Twistedheat02
Wow they are some big speakers!!

Re: PMC

Posted: Wed Jul 08, 2020 10:36 am
by savvypaul
This is the (4th order) crossover used by PMC.

It will give you a very pretty graph...and kill your music.

Image

Re: PMC

Posted: Wed Jul 08, 2020 11:33 am
by Twistedheat02
Hi Paul,

Why do you say that?

(Trust me I'm not being argumentative, and I'm not precious, just trying to understand a bit more) :grin: :guiness; :mrgreen:

Re: PMC

Posted: Wed Jul 08, 2020 11:47 am
by savvypaul
Twistedheat02 wrote: Wed Jul 08, 2020 11:33 am Hi Paul,

Why do you say that?

(Trust me I'm not being argumentative, and I'm not precious, just trying to understand a bit more) :grin: :guiness; :mrgreen:
Complexity.

The additional components are there to address problems with the cabinet and the drive units.

Every design has compromises, of course. However, in my opinion, complex crossovers are one of the worst compromises you can make. Have a listen, in comparison, to a speaker with a 1st order crossover (or, better still, a speaker with no crossover).

Here's an article from a designer (a member here) that uses 1st order crossovers: https://www.3squareaudio.com/copy-of-1s ... e%20woofer.

Re: PMC

Posted: Wed Jul 08, 2020 11:49 am
by Twistedheat02
savvypaul wrote: Wed Jul 08, 2020 11:47 am
Twistedheat02 wrote: Wed Jul 08, 2020 11:33 am Hi Paul,

Why do you say that?

(Trust me I'm not being argumentative, and I'm not precious, just trying to understand a bit more) :grin: :guiness; :mrgreen:
Complexity.

The additional components are there to address problems with the cabinet and the drive units.

Every design has compromises, of course. However, in my opinion, complex crossovers are one of the worst compromises you can make. Have a listen, in comparison, to a speaker with a 1st order crossover (or, better still, a speaker with no crossover).

Here's an article from a designer (a member here) that uses 1st order crossovers: https://www.3squareaudio.com/copy-of-1s ... e%20woofer.
Ok. Nice one Paul. I'll check that article. Cheers

Re: PMC

Posted: Wed Jul 08, 2020 12:25 pm
by savvypaul
Twistedheat02 wrote: Wed Jul 08, 2020 11:49 am
savvypaul wrote: Wed Jul 08, 2020 11:47 am
Twistedheat02 wrote: Wed Jul 08, 2020 11:33 am Hi Paul,

Why do you say that?

(Trust me I'm not being argumentative, and I'm not precious, just trying to understand a bit more) :grin: :guiness; :mrgreen:
Complexity.

The additional components are there to address problems with the cabinet and the drive units.

Every design has compromises, of course. However, in my opinion, complex crossovers are one of the worst compromises you can make. Have a listen, in comparison, to a speaker with a 1st order crossover (or, better still, a speaker with no crossover).

Here's an article from a designer (a member here) that uses 1st order crossovers: https://www.3squareaudio.com/copy-of-1s ... e%20woofer.
Ok. Nice one Paul. I'll check that article. Cheers
Think of a complex crossover being like a powerful painkiller - treating only the symptoms of disease, not the causes, and creating their own undesirable side-effects.

Re: PMC

Posted: Wed Jul 08, 2020 12:51 pm
by Hannes-Gregor
But the AP20 didn't run hot with the PMCs (and sounded great!).

Re: PMC

Posted: Wed Jul 08, 2020 1:00 pm
by savvypaul
Put the PMCs up against a pair of Cube 1 or 2...

btw, your tip to replace the metal jumper bars is a good one.

Re: PMC

Posted: Wed Jul 08, 2020 1:03 pm
by savvypaul
I feel a bake off coming on... :grin: