FAST Build: Alpair 7.3 - Seas L26ROY - diyAudio
Go Back   Home > Forums > Commercial Sector > Manufacturers > Markaudio

Markaudio Designers and builders of audiophile grade drivers

Reply
 
Thread Tools Search this Thread
Old 17th October 2011, 11:24 AM   #1
Swifty is offline Swifty  Netherlands
diyAudio Member
 
Join Date: Jun 2004
Location: Holland
Default FAST Build: Alpair 7.3 - Seas L26ROY

After the proof of concept monkey coffins I poster earlier, I finally started building the cabinets for my FAST project. I will be using the "Translam" method, mainly due to my limited access to nice tools like a table saw (or even a shed for that matter) All I have is a router, jigsaw and a workmate.

The sides will be made from 24mm baltic birch ply and will function as the L26ROY's baffle. The middle 9 slices are water proof MDF. Bracing will be extensive. to get the resonating frequency above 200hz as much as possible. (200 hz will be the crossover point between the two drivers)

The Alpair 7.3 will be housed in a separate chamber, designed to minimiste standing waves. This chamber will be made heavy and thick by adding car audio deadening mats to keep it's resonating frequency below 200 hz as much as possible. Here are a few pics of the progress so far:

Click the image to open in full size.
Click the image to open in full size.
Click the image to open in full size.
  Reply With Quote
Old 17th October 2011, 11:36 AM   #2
diyAudio Member
 
buzzforb's Avatar
 
Join Date: Oct 2010
Location: Burlington, NC
I am inspired. Keep up the good work. I have been looking at how to do a teardrop for the 7.3. Just seems like a cool idea and there is another fellow doing it with a Fostex. I will try combining the 7's with a T-TQWT for my CA 22RNX. Bjorno simmed one for me and it looks usable up to 150-200Hz. May I ask why you dropped the OB concept?
  Reply With Quote
Old 17th October 2011, 12:14 PM   #3
Swifty is offline Swifty  Netherlands
diyAudio Member
 
Join Date: Jun 2004
Location: Holland
Thanks Buzz!

Did I ever mention wanting to go for an OB arrangement? I don't think so...
  Reply With Quote
Old 17th October 2011, 12:17 PM   #4
diyAudio Member
 
buzzforb's Avatar
 
Join Date: Oct 2010
Location: Burlington, NC
I thought I remember you had them in OB setup, oh well, too many threads in my head.
  Reply With Quote
Old 17th October 2011, 01:56 PM   #5
diyAudio Member
 
Join Date: Feb 2011
Quote:
Originally Posted by buzzforb View Post
I thought I remember you had them in OB setup, oh well, too many threads in my head.
Goto uses an OB.
  Reply With Quote
Old 17th October 2011, 02:04 PM   #6
diyAudio Member
 
tuxedocivic's Avatar
 
Join Date: Jan 2011
Location: Ladysmith, BC
This looks awesome! Very keen to follow this
  Reply With Quote
Old 14th March 2012, 05:07 PM   #7
Swifty is offline Swifty  Netherlands
diyAudio Member
 
Join Date: Jun 2004
Location: Holland
Winter has ended, weather is improving, so onward with the build!

For the cabinets I am using a combination of waterproof MDF and Birch Ply. The Birch will be used for both side panels and MDF for the rest. The MDF part will be haevily reinforced and stiffened by birch ply supports as shown in the picture. Furthermore I will cross brace all panels extensively with broom handle sticks. Pics of that will follow.

The first cabinet is ready for the final sanding/filling/finishing! Yay!

Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.
  Reply With Quote
Old 14th March 2012, 11:30 PM   #8
diyAudio Member
 
malibujeff's Avatar
 
Join Date: Mar 2010
Location: Georgia
Really cool.
  Reply With Quote
Old 15th March 2012, 07:54 AM   #9
Andy17 is offline Andy17  Germany
diyAudio Member
 
Join Date: Feb 2012
Looks really great
  Reply With Quote
Old 15th March 2012, 08:58 AM   #10
zman01 is online now zman01  Bangladesh
diyAudio Member
 
Join Date: Feb 2011
Location: Dhaka
Yup looking great.

Boenicke-audio inspired shell?

Look forward to your listening impressions.
  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
Advice for FAST with alpair 7 Veggiel Full Range 6 14th January 2013 11:26 AM
Alpair 7 FAST Prototype Westy37 Markaudio 9 17th October 2011 09:48 AM
Alpair 7.3 FAST help needed! StevenZ Markaudio 10 28th September 2011 10:24 PM
Seas L26ROY subwoofer FINISHED PICS Drakmin Subwoofers 15 21st May 2011 11:55 PM
Seas L26ROY now available at hasaudio hasaudio.co.nz Vendor's Bazaar 0 21st April 2010 08:22 PM


New To Site? Need Help?

All times are GMT. The time now is 09:33 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