Please vote for 2-way monitor drivers/port disposition

Sony · 7th July 2008, 04:06 PM

The goal is to design a superlative 2-way monitor.

Which one will be the best front-disposition (drivers and port) - A, B, or C? (check picture). Why?

Thanks!

Robh3606 · 7th July 2008, 04:46 PM

Any reason you are not putting the port on the back of the enclosure??

Rob

Sony · 7th July 2008, 06:30 PM

Rob,

Why should I put the port on the back of the enclosure?

One reason to put in the front - less placement constraints (distance to the rear wall).

Robh3606 · 7th July 2008, 07:06 PM

I like to keep the front baffle as difraction free as I can. There is always some port noise at high levels. I always drop mine on the rear to avoid both issues. If you are not going to stand mount them and need them on the front that works too but in that case I would go for A to keep the ports away from the area between both drivers.

Rob

barry.childs · 7th July 2008, 09:07 PM

Interesting, Look at my thread regarding front and rear ports. I'm sure it would be suitable on small cabinets though, but it worked for me. Sharing the displacement. Especially at high level.

PeteMcK · 8th July 2008, 12:16 AM

'A' would give a more rigid enclosure...

Sony · 8th July 2008, 09:29 AM

Thanks for the answers. A few observations:

Ports near or distant from drivers
Rob, you may be right, but don't you find strange a few top manufacturers decided to short the distances from ports to drivers, in some cases to Zero

as Vienna Accoustics or Linn where the port is coincident with the tweeter. Check these examples:
http://www.viennaacoustics.com/products/haydn/haydn.php
http://www.linn.co.uk/music_systems_komri
http://www.genelec.com/products/2-way-monitors/1032a/

Enclosure Rigidity
Pete, that is correct but not an issue, as I will be using granite side panels and aluminium font and rear panel.

Front vs. Rear
Despite all the theory, in my setup, all the front ported speakers provided better results (several placements attempted) especially more focus and clarity. Also, I don't play at high levels.

Port shape/number of ports
Won't two ports or the rectangular port provide the best vent noise/speed balance?

Drivers vertical alignment
Aligned or not? Unaligned example: Proac Response 1SC.

Geek · 8th July 2008, 10:51 AM

Hi,

Quote:

Originally posted by Sony
Ports near or distant from drivers
Rob, you may be right, but don't you find strange a few top manufacturers decided to short the distances from ports to drivers, in some cases to Zero

as Vienna Accoustics or Linn where the port is coincident with the tweeter. Check these examples:
http://www.viennaacoustics.com/products/haydn/haydn.php
http://www.linn.co.uk/music_systems_komri
http://www.genelec.com/products/2-way-monitors/1032a/

I like them as near as possible to the woofer.

Quote:

Front vs. Rear
Despite all the theory, in my setup, all the front ported speakers provided better results (several placements attempted) especially more focus and clarity. Also, I don't play at high levels.

I've done both and for bookshelves, I'll take front anyday.

Quote:

Port shape/number of ports
Won't two ports or the rectangular port provide the best vent noise/speed balance?

Yes!

I've done experimentation with this.... two ports are better than one.

Quote:

Drivers vertical alignment
Aligned or not? Unaligned example: Proac Response 1SC.

If the distance the driver is offset isn't near it's baffle step or crossover, you're OK.

Cheers!

8th July 2008, 12:16 AM	#6
PeteMcK diyAudio Member Join Date: Feb 2002 Location: Sydney	'A' would give a more rigid enclosure... __________________ ‘today… there lives alongside the twentieth century the tenth or thirteenth. A hundred million people use electricity and still believe in the magic power of signs and exorcisms” Trotsky

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7th July 2008, 04:46 PM	#2
Robh3606 diyAudio Member Join Date: Nov 2002 Location: Destiny	Any reason you are not putting the port on the back of the enclosure?? Rob

7th July 2008, 06:30 PM	#3
Sony diyAudio Member Join Date: Sep 2004 Location: Europe	Rob, Why should I put the port on the back of the enclosure? One reason to put in the front - less placement constraints (distance to the rear wall).

7th July 2008, 07:06 PM	#4
Robh3606 diyAudio Member Join Date: Nov 2002 Location: Destiny	I like to keep the front baffle as difraction free as I can. There is always some port noise at high levels. I always drop mine on the rear to avoid both issues. If you are not going to stand mount them and need them on the front that works too but in that case I would go for A to keep the ports away from the area between both drivers. Rob

7th July 2008, 09:07 PM	#5
barry.childs diyAudio Member Join Date: Jun 2008 Location: Lostwithiel, Cornwall	Interesting, Look at my thread regarding front and rear ports. I'm sure it would be suitable on small cabinets though, but it worked for me. Sharing the displacement. Especially at high level.

8th July 2008, 09:29 AM	#7
Sony diyAudio Member Join Date: Sep 2004 Location: Europe	Thanks for the answers. A few observations: Ports near or distant from drivers Rob, you may be right, but don't you find strange a few top manufacturers decided to short the distances from ports to drivers, in some cases to Zero as Vienna Accoustics or Linn where the port is coincident with the tweeter. Check these examples: http://www.viennaacoustics.com/products/haydn/haydn.php http://www.linn.co.uk/music_systems_komri http://www.genelec.com/products/2-way-monitors/1032a/ Enclosure Rigidity Pete, that is correct but not an issue, as I will be using granite side panels and aluminium font and rear panel. Front vs. Rear Despite all the theory, in my setup, all the front ported speakers provided better results (several placements attempted) especially more focus and clarity. Also, I don't play at high levels. Port shape/number of ports Won't two ports or the rectangular port provide the best vent noise/speed balance? Drivers vertical alignment Aligned or not? Unaligned example: Proac Response 1SC.

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