Go Back   Home > Forums > > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Planet 10 hifi Home of the Frugal-phile™ - Planet 10 HiFi

Reply
 
Thread Tools Search this Thread
Old 10th August 2017, 02:16 AM   #1
digiOS is offline digiOS  United States
diyAudio Member
 
Join Date: Jun 2016
Question Alpair 12PW Recommended Enclosures

Interested in building some enclosures to run some tests.

Sealed Enclosure (Sphere) 1.25 cu.ft
Egg Shaped Rectangle 1.6 cu.ft staggard with a 3" port 7" long below it.

Testing some builds to try and accomplish flat response across entire bandwidth 20-20khz possible thinking of using a passive radiator to assist the driver.

Please Advise ......

TX
  Reply With Quote
Old 10th August 2017, 03:59 AM   #2
planet10 is offline planet10  Canada
frugal-phile(tm)
diyAudio Moderator
 
planet10's Avatar
 
Join Date: Oct 2001
Location: Victoria, BC, NA, Sol III
Alpair 12PW Recommended Enclosures
Quote:
and accomplish flat response across entire bandwidth 20-20khz
You are unlikely to achieve that. The A12pw. Scottís ML-TL reaches into the low 20s F10. The A12pw is a wide range and starts to fade above 10k. Still very listenable as a full-range. And a very nice one. I like it better than the A12p.

We already have an MTM in Scottís ML-TL with an A7x. We are also working on one with the A10p in our large Mar-Ken enclosure.

1.25 ft^3 ~35 litre, youíll get in the low 30s F10.

The reflex enclosure has a pretty ungly bump at resonance, it needs to be tuned lower.

Alpair 12PW Recommended Enclosures-a12p45l-49hz-reflex-png

dave
Attached Images
File Type: png A12p45l-49Hz-reflex.png (11.4 KB, 321 views)
File Type: gif A122pw-sealed.gif (20.5 KB, 158 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 11th August 2017, 05:49 PM   #3
digiOS is offline digiOS  United States
diyAudio Member
 
Join Date: Jun 2016
Default Recommendations

TX again.

I will probably use a egg shaped to tear drop type enclosure to reduce backwave, diffraction, drag but my question to you would be the optimal airspace to accomplish flat broad range response even if its starts to fade on upper and lower end?
  Reply With Quote
Old 11th August 2017, 05:50 PM   #4
digiOS is offline digiOS  United States
diyAudio Member
 
Join Date: Jun 2016
Can you post Scott's "ML-TL"
  Reply With Quote
Old 11th August 2017, 09:15 PM   #5
chrisb is offline chrisb
diyAudio Member
 
Join Date: Aug 2002
Location: victoria BC
I'm running the MTM's Dave mentioned above, and would agree with this assessment of the 12PW over the P - the latter of which I've heard in both a compact standmount and Scott's SuperPensil small fridge sized enclosure.


To achieve the bass performance of which this driver is capable will need something much larger than a small box of any shape and PR.

If you're up for a more elaborate build than a simple rectilinear box, take a look at the Trapezoid floorstander design of Dave's - Bernie Foucher built a stunningly gorgeous pair in solid maple that deliver in spades.

Yes, while they are completely benign to my ears operating full range, they definitely need a tweeter for at least the last 2 octaves.
  Reply With Quote
Old 11th August 2017, 10:57 PM   #6
planet10 is offline planet10  Canada
frugal-phile(tm)
diyAudio Moderator
 
planet10's Avatar
 
Join Date: Oct 2001
Location: Victoria, BC, NA, Sol III
Alpair 12PW Recommended Enclosures
Quote:
Originally Posted by digiOS View Post
Can you post Scott's "ML-TL"
I donít know that this has been released for free public use. As is, it is only a twin driver design but could esily be repurposed for a single driver.

Here are the Mar-Ken of which Chris speaks:

Click the image to open in full size.

And the ML-TL:

Click the image to open in full size.

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 13th August 2017, 06:10 PM   #7
chrisb is offline chrisb
diyAudio Member
 
Join Date: Aug 2002
Location: victoria BC
I'm privy to a lot of development / prototype drawings that don't get built locally - or in the case of Mark Audio drivers, some that are published by them - and I'm sure I recall a few sketches MLTLS for the A12PW - a tall single, a folded single, as well as a narrow baffle version of the MTM shown above.
  Reply With Quote
Old 10th October 2017, 03:20 AM   #8
skeeter99 is offline skeeter99  United States
diyAudio Member
 
skeeter99's Avatar
 
Join Date: Feb 2010
Location: Seattle, WA
Quote:
Originally Posted by planet10 View Post
And the ML-TL:

Click the image to open in full size.
Was any sort of crossover used in the ML-TL version? I'm guessing that's an A7 with the 12PW's?
  Reply With Quote
Old 10th October 2017, 03:30 AM   #9
planet10 is offline planet10  Canada
frugal-phile(tm)
diyAudio Moderator
 
planet10's Avatar
 
Join Date: Oct 2001
Location: Victoria, BC, NA, Sol III
Alpair 12PW Recommended Enclosures
Quote:
Originally Posted by skeeter99 View Post
Was any sort of crossover used in the ML-TL version? I'm guessing that's an A7 with the 12PW's?
Yes, A7.3eN. We tried a number of XOs. PLLXO 1st order at 240 Hz. 4th order digital that was built into Chrisí Onkyo HT receiver. A 4th order (acoustic, about 800 Hz) passive XO that Aaron worked up for us.

Currently living in Chrisí HT with the passive XO and A7 MOAP. He is using the extra 2 channels for height speakers.

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 10th October 2017, 03:56 AM   #10
skeeter99 is offline skeeter99  United States
diyAudio Member
 
skeeter99's Avatar
 
Join Date: Feb 2010
Location: Seattle, WA
So is this a 2.5 or 3-way design? Why the two crossover points?
  Reply With Quote

Reply


Alpair 12PW Recommended EnclosuresHide 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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Alpair 7P & Alpair 12PW combination. markaudio Planet 10 hifi 324 14th October 2016 05:44 AM
Alpair 12PW/Viawave build Bill poster Multi-Way 62 30th July 2016 06:49 AM
Alpair 12pw Fullrange? sk971 Full Range 13 5th February 2016 08:17 PM
FS: pair of Markaudio Alpair 12PW wide range woofers timpert Swap Meet 0 4th September 2015 08:31 PM
Is this material suitable for damping an alpair 7P /12PW cabinet? timpert Planet 10 hifi 5 23rd May 2015 04:28 AM


New To Site? Need Help?

All times are GMT. The time now is 05:52 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 14.29%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright ©1999-2017 diyAudio
Wiki