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kevinr 15th September 2012 12:21 AM

close to the wall
 
If I purchase a pair of the Mark Audio Alpair 7 drivers and put them on stands I wouldn't be able to put them very far away from the back wall due to listening room size limitations .
13 X 14 x 8 with good sized openings on each end by the speakers leading to other rooms.
I didn't know if these drivers would work effectively being so close to the rear wall and wanted to ask for opinions/advice before going this direction .
They would go in the Mark Audio recommended enclosure and port dimensions .
I do see the Pensil design and will either go that route or buy a PE curved cabinet .

Thanks

chrisb 15th September 2012 07:39 AM

Quote:

Originally Posted by kevinr (Post 3165329)
If I purchase a pair of the Mark Audio Alpair 7 drivers and put them on stands I wouldn't be able to put them very far away from the back wall due to listening room size limitations .
13 X 14 x 8 with good sized openings on each end by the speakers leading to other rooms.
I didn't know if these drivers would work effectively being so close to the rear wall and wanted to ask for opinions/advice before going this direction .
They would go in the Mark Audio recommended enclosure and port dimensions .
I do see the Pensil design and will either go that route or buy a PE curved cabinet .

Thanks


They'll work just fine close to the wall.

I've heard several different single and multi-ways in the PE boxes - they're OK if you haven't the ability to build your own, but the Pensils (preferably in quality plywood) will be worth every penny and hour of your time - it's not even close - plus you save money on not needing stands

kevinr 15th September 2012 03:19 PM

okay , that's what I needed to know not being familiar with these MA drivers I didn't know if boundary re-inforcement or lack thereof was an issue or not .
I'll go with the Pensil design as soon as I figure out which one is applicable .
I see there are different designs for different MA drivers and also one called the Woden design that looks to be a larger interior due to increased depth.
Thanks

chrisb 15th September 2012 08:06 PM

1 Attachment(s)
Quote:

Originally Posted by kevinr (Post 3165932)
okay , that's what I needed to know not being familiar with these MA drivers I didn't know if boundary re-inforcement or lack thereof was an issue or not .
I'll go with the Pensil design as soon as I figure out which one is applicable .
I see there are different designs for different MA drivers and also one called the Woden design that looks to be a larger interior due to increased depth.
Thanks

Woden is the name of Scott Lindgren's commercial design enteriprise - there are numerous enclosure designs for a range of Fostex and Mark Audio drivers, as well as other exotics.

The correct Pensil enclosure for the current Alpair7.3 would be :
http://frugal-phile.com/boxlib/pensi...sil7s3-map.pdf

These are a fairly easy build, particularly if you don't get as elaborate with bracing as some folks :rolleyes:

Just be sure to fabricate with at least part of rear panel removable to allow for adjustment to levels of fill material. FWIW, for use with my Denon surround receiver, I ended up removing at least 1/3 of the amount recommended on the drawing. To a fair degree with will be system/room dependent and I'm not sure what other builders have found.

Just please used quality plywood not MDF.

kevinr 15th September 2012 10:25 PM

makes dust fine
 
okay , printed the PDF out , thanks for posting the link to it .
I'll be using quality Baltic Birch from our local lumber yard . Don't care for the unhealthy dusty MDF


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