Another A12P open baffle - diyAudio
Go Back   Home > Forums > Commercial Sector > Manufacturers > Markaudio

Markaudio Designers and builders of audiophile grade drivers

Reply
 
Thread Tools Search this Thread
Old 5th March 2013, 01:41 PM   #1
diyAudio Member
 
Join Date: Mar 2006
Location: London
Default Another A12P open baffle

Here's some photo's of my first open baffle project using A12P supported by 15" Fane Sovereign woofers. Alpairs currently being powered with a HLLY T90 soon to be replaced with a PA0901A from Twin Audio - which will be my first experience of tube sound. Woofers fed by a Crown XLS602, and MiniDSP taking care of the crossover and equalisation. Drivers only have about 50hrs breaking-in so far, but first impressions when I started listening to the finished speakers this weekend were very promising.

Matt
Attached Images
File Type: jpg photo2.jpg (518.8 KB, 270 views)
File Type: jpg photo3.jpg (853.9 KB, 257 views)
File Type: jpg photo5.jpg (410.3 KB, 265 views)
  Reply With Quote
Old 5th March 2013, 02:02 PM   #2
diyAudio Moderator Emeritus
 
Bas Horneman's Avatar
 
Join Date: Apr 2002
Location: The Netherlands
Blog Entries: 18
They look awesome. Retro and modern all in one. Congrats. Looking forward to your listening impressions after living with it for a while.
  Reply With Quote
Old 5th March 2013, 04:33 PM   #3
diyAudio Member
 
Join Date: Mar 2006
Location: London
Thanks Bas, The photo doesn't do justice to the Tygan fabric grill. The A12Ps do sound very good so far, much smoother than my previous JX92S - with only some harshness on very high female vocals (Kate Bush at her highest!). I'm hoping that is just down to not enough break-in.
  Reply With Quote
Old 5th March 2013, 09:59 PM   #4
Toppsy is offline Toppsy  United Kingdom
diyAudio Member
 
Join Date: Apr 2009
Location: Lancashire, England
Quote:
with only some harshness on very high female vocals (Kate Bush at her highest!). I'm hoping that is just down to not enough break-in.
I would suspect your amp here. You'll notice a massive improvement when you get the tube amp.
  Reply With Quote
Old 5th March 2013, 10:05 PM   #5
adason is offline adason  United States
diyAudio Member
 
adason's Avatar
 
Join Date: Nov 2004
Location: Maryland
well done matt
  Reply With Quote
Old 5th March 2013, 10:14 PM   #6
TiMBoZ is offline TiMBoZ  Australia
diyAudio Member
 
Join Date: Aug 2012
Location: Sydney
Elegant, well executed OB. Nice one and Good on ya!

If you're inclined: experiment with some absorbers behind the speakers if they are in proximity to hard walls.
  Reply With Quote
Old 5th March 2013, 10:26 PM   #7
PKI is offline PKI  United States
diyAudio Member
 
PKI's Avatar
 
Join Date: Aug 2011
Very nice speakers! I am thinking of something similar, do you think Alpha 15 will be much worse as a woofer?
  Reply With Quote
Old 5th March 2013, 10:42 PM   #8
diyAudio Member
 
markaudio's Avatar
 
Join Date: Nov 2008
Hello Matt,
Great work, very stylish! Always good to projects like this as they give high-street offerings a run for their expensive money.

You'll need another 150+ hours on the Alp12P's at low vols to get them better run-in. Tony's PA0901A should work well. Its a copy of Derek Shek's excellent Miniwatt. Not sure what Tony's got in amp stock at the moment but I'd be tempted to ask him if there's any nice small vintage tubie amps he could dust off and sell you.

Cheers
Mark.
  Reply With Quote
Old 5th March 2013, 10:45 PM   #9
PKI is offline PKI  United States
diyAudio Member
 
PKI's Avatar
 
Join Date: Aug 2011
Mark, maybe you can say couple of words here, what will be a difference between 12P and 10 for this application? Thanks.
  Reply With Quote
Old 6th March 2013, 12:02 AM   #10
diyAudio Member
 
markaudio's Avatar
 
Join Date: Nov 2008
Quote:
Originally Posted by PKI View Post
Mark, maybe you can say couple of words here, what will be a difference between 12P and 10 for this application? Thanks.
Sure,
From the function perspective:

The 12P has the single mechanical (semi free to air) suspension system which has more progressive load resistance. Its spider does all the mechanical operation of the power-train, the front suspension acting primarily as an air seal and partial damper. This driver's design is well suited to the type(s) of open project application like/similar to Matt's.

The Alp10 Gen. 2 has a long throw linear suspension design better suited to ported/vented and sealed systems. The 10 can be used on open applications but more care is needed to limit/control its LF output.

Should I have time to make an open baffle project, I'd personally use the 12P as my first choice. Re woofers, my choice(s) would be influenced by the design of their power-trains, paying particular attention to the cone's total depth, the number of radii deployed across its surface substrate and its moving mass, see post 120 on this thread:

Future woofer production

Thanks
Mark.

Last edited by markaudio; 6th March 2013 at 12:25 AM.
  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
Does open baffle suffer from baffle step? 454Casull Multi-Way 15 19th May 2012 04:12 PM
Upwards aligned open baffle? ( pop box meets open baffle ) OllBoll Full Range 3 28th March 2011 02:00 AM
Murphy baffle radios [ open baffle ] keithpeter Full Range 10 11th September 2007 08:59 PM
what effect does baffle have on open-baffle system? kappa546 Multi-Way 6 24th January 2006 11:21 PM
Australians- what solid timbers for baffle? (open baffle loudspeaker) tktran Multi-Way 13 30th November 2004 12:09 AM


New To Site? Need Help?

All times are GMT. The time now is 09:29 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