Alpair 7 flange notes on size - diyAudio
Go Back   Home > Forums > Loudspeakers > Full Range

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 20th July 2010, 11:06 PM   #1
diyAudio Member
 
Join Date: Feb 2004
Location: Appleton, WI
Default Alpair 7 flange notes on size

I went to visit Madisound to get the info on the Mark Audio Alpair 7.

(bear with me, this is a single driver question rather than construction tip)

The measures given are a cutout of 103mm. I have a hole saw that can do that pretty well.

The outside diameter though is 135. The flange then is about 16 mm which is huge and bigger than my rabetting set.

I'm just confirming that actual construction goes this way for the Alpair 7.

Today I twiddled with what I use for a trammel and a 3/4 bit. In combination the trammel pin just clears the router base and will cut the necessary wide rabbet then using a hole cutter to make the cut out.

The goal is flush a mount which is a personal preference.
  Reply With Quote
Old 21st July 2010, 01:06 AM   #2
frugal-phile(tm)
diyAudio Moderator
 
planet10's Avatar
 
Join Date: Oct 2001
Location: Victoria, BC, NA, Sol III
Blog Entries: 5
Those dimensions are pretty close. Here is a drawing i did for my work. Madisound has the newest run with the superGaskets which makes the bezel flange just under 10mm.

dave
Attached Images
File Type: gif Alpair7-dims.gif (7.9 KB, 165 views)
__________________
community sites t-linespeakers.org, frugal-horn.com, frugal-phile.com ........ commercial site planet10-HiFi
p10-hifi forum here at diyA
  Reply With Quote
Old 21st July 2010, 04:44 AM   #3
diyAudio Member
 
Join Date: Feb 2004
Location: Appleton, WI
This is a better drawing. There was a confusing line on the original pdf.

Thanks for the reply. I have no clue what a super gasket is.

In looking at the Alpair 7 I wondered why the large flange? In size and build is it not close to the CHR-70?

Also (my head is starting to spin with different drivers now) which Mark Audio is
as efficient as the FE167e or close? Which plays equally loud with the 167e at low levels? I usually build one test unit at a time.

I was looking at SPL. Alpair 7 has 84.5db. FE167e has 94db (from the original box notes.) Maybe would have to move up to Alpair 10?

Note to self: I have to spruce up the build that the 167e is in now as well.

Last edited by loninappleton; 21st July 2010 at 04:45 AM. Reason: spelling and grammar
  Reply With Quote
Old 21st July 2010, 05:11 AM   #4
frugal-phile(tm)
diyAudio Moderator
 
planet10's Avatar
 
Join Date: Oct 2001
Location: Victoria, BC, NA, Sol III
Blog Entries: 5
The most efficient MA is the Alpair12 at just over 89. FE167 is ~92.5. The MA trades efficency for bass extension & smoothness. Mark is going to try to get the A10 up to over 88 dB. The A7 is 4 ohms which if you have a t-amp or most SS amps means you gain 3dB there.

Both the A7 & A12 come with a Bezel cover that i wish Mark would leave loose in the box (as planned for the A10, so people can drop them into their old boxes), but the biggest distribs want them. It makes the bezel wider & deeper. Without it the surround would be flush with the bezel (and therefore the baffle. It does stiffen the basket a bit.

dave
__________________
community sites t-linespeakers.org, frugal-horn.com, frugal-phile.com ........ commercial site planet10-HiFi
p10-hifi forum here at diyA
  Reply With Quote
Old 21st July 2010, 03:44 PM   #5
diyAudio Member
 
Join Date: Feb 2004
Location: Appleton, WI
Thanks for the reply.

(OT) For some time I have been looking for 5 in FR in the price range of a 4 in. FE127e

Comparison of the Alpair and CHR70 leads me to favor the CHR70 given the efficiency similarity (84.5 db for both.) A wide bezel treatment for the less expensive item might dress it up.

I think I will practice my construction skills and make router jigs for a while.
  Reply With Quote
Old 21st July 2010, 04:29 PM   #6
frugal-phile(tm)
diyAudio Moderator
 
planet10's Avatar
 
Join Date: Oct 2001
Location: Victoria, BC, NA, Sol III
Blog Entries: 5
CHR, A7 & EL70 are nominal 4". FE127 is 4.5", A10 is 5.5", A12 is 6.5"

dave
__________________
community sites t-linespeakers.org, frugal-horn.com, frugal-phile.com ........ commercial site planet10-HiFi
p10-hifi forum here at diyA
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Alpair-10 with Alpair 5, German combo markaudio Full Range 17 7th November 2010 11:58 PM
Alpair 10 Bass + Alpair 5 - Woodwill Japan markaudio Markaudio 16 26th January 2010 11:48 AM
Flange schematic amelecsol2000 Instruments and Amps 7 16th March 2008 12:51 AM
What 104mm flange tweeters do I NEED to hear? TurboFC3S Multi-Way 8 19th July 2007 07:13 PM
Port design flange question TheoM Multi-Way 3 2nd November 2003 07:15 AM


New To Site? Need Help?

All times are GMT. The time now is 12:13 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2