Alpair 7 - out of the bag - 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 16th June 2009, 08:44 AM   #1
diyAudio Member
 
markaudio's Avatar
 
Join Date: Nov 2008
Default Alpair 7 - out of the bag

Hi Guys,
Since Mark L has "let the cat our of the bag", I've been receiving much email traffic. I'm not able to cope with the various questions and make these drivers at the same time. So here's some basic information from the pre-production units.

I will make a proper post in Vendors later next month once done making these drivers.

Alpair 7 - Extended Full Range unit operating to 30-kHz @+80dB.
New frame - Dia = 130-mm
New cone - all machine formed (not spun)
New U cap - dual bond direct on to a pre-formed edge at top of v coil.
New connector system - separate moulded units interlocked into the frame, colour coded.

T/S - Pre-Prod batch 003 - LMS-4114-06/09
ALPAIR7 - 2 mag. with cover
Revc= 3.600 Ohm
Fo= 65.835 Hz
Sd= 5.027K mm
Vas= 5.148 Ltr
Cms= 1.435m M/N
Mmd= 3.868 g
Mms= 4.073 g
BL= 2.819 T.M
Qms= 1.944
Qes= 0.763
Qts= 0.548
Levc= 19.445u H
No= 0.186 %
SPLo= 84.715 dB
Xmax = 4.5mm (1 way)
Rated at 20 watts cont.

That's it for now. Please email me only if urgent.
Cheers,
Mark.
Attached Images
File Type: jpg alp7_fr_imp_1a.jpg (77.6 KB, 1031 views)
  Reply With Quote
Old 16th June 2009, 08:46 AM   #2
diyAudio Member
 
markaudio's Avatar
 
Join Date: Nov 2008
And a Pic
(Also, my chance to intro our Evan Yu, excellent speaker builder, worth his weight in gold!)
Attached Images
File Type: jpg alp7.jpg (70.8 KB, 1169 views)
  Reply With Quote
Old 16th June 2009, 02:13 PM   #3
ped is offline ped  United States
diyAudio Member
 
Join Date: Apr 2003
Location: PA
Very cool!

Will these afford little more spacing between the mounting holes and the edge of the driver cutout? It's a little too close for comfort with the 6's and 10's that I have
  Reply With Quote
Old 16th June 2009, 02:55 PM   #4
frugal-phile(tm)
diyAudio Moderator
 
planet10's Avatar
 
Join Date: Oct 2001
Location: Victoria, BC, NA, Sol III
Blog Entries: 5
Mark,

It looks like the A7 has a double magnet & a cap?

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 16th June 2009, 03:06 PM   #5
EUVL is offline EUVL  Europe
diyAudio Member
 
Join Date: Oct 2003
> Since Mark L has "let the cat our of the bag" .....

Maybe we should call it the "Cat" instead.




Patrick
  Reply With Quote
Old 16th June 2009, 03:21 PM   #6
_henry_ is offline _henry_  Australia
diyAudio Member
 
Join Date: Jun 2002
Location: Australia
ALPAIR evolution



looks great
  Reply With Quote
Old 16th June 2009, 04:17 PM   #7
diyAudio Member
 
HareBrained's Avatar
 
Join Date: Mar 2009
Mark,

You may want to clearly state on the FR/Z sweeps that they are the preproduction units, in case something changes. You don't want that data to be touted as representative if it turns out to not be.

It looks like an interesting driver. Good luck with finishing the transition to production.

John
  Reply With Quote
Old 17th June 2009, 04:07 PM   #8
diyAudio Member
 
markaudio's Avatar
 
Join Date: Nov 2008
Hi John,

Thanks for your reminder. I did say "pre-production" and remind guys that there may be some variation. But, if there are variations, I anticipate such changes will be moderate. Most of you know I work hard to publish driver data that is very close to "actual" performance.

Thanks

Mark.
  Reply With Quote
Old 17th June 2009, 05:31 PM   #9
diyAudio Member
 
Scottmoose's Avatar
 
Join Date: Mar 2005
Location: UK
Nice job on the new A7 Mark -looks like it's going to be a great little unit; possibly a little more flexible for different sorts of loads too. I like the reasonably low mass-corner.
  Reply With Quote
Old 17th June 2009, 05:51 PM   #10
badman is offline badman  United States
diyAudio Member
 
badman's Avatar
 
Join Date: Sep 2003
Location: Sunny Tustin, SoCal
Do these use an aluminum former?
__________________
I write for www.enjoythemusic.com in the DIY section. You may find yourself getting a preview of a project in-progress. Be warned!
  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 12 - also out of the bag markaudio Full Range 23 23rd November 2009 03:48 AM
Alpair 10 and 5 Combination _henry_ Full Range 19 1st June 2009 08:24 PM
alpair 10 box width ? norman bates Full Range 9 15th May 2009 03:54 AM
Alpair 10 wide bass driver and Alpair 10 Fullrange _henry_ Full Range 71 15th March 2009 11:37 AM
Can anyone help TL or ML-TL for Alpair 10 _henry_ Full Range 3 31st December 2008 06:31 AM


New To Site? Need Help?

All times are GMT. The time now is 08:51 AM.


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