Alpair 12 break-in question: 2mm? - diyAudio
Go Back   Home > Forums > Commercial Sector > Manufacturers > Markaudio

Markaudio Designers and builders of audiophile grade drivers

Reply
 
Thread Tools Search this Thread
Old 11th February 2011, 12:07 PM   #1
Urchinn is offline Urchinn  United States
diyAudio Member
 
Join Date: Feb 2008
Default Alpair 12 break-in question: 2mm?

Okay, tomorrow we build the Solstice cabinets and install the Alpair 12s. My next dumb question (hey, I gotta learn somehow!) concerns the break-in period. Mark suggests 2mm for 20 hours, and 4mm for 200 hours. Okay, I have no idea what that means! Is 2mm the volume of a normal conversation at a dinner table? Is 4mm the volume of your TV? Any help would be wonderful, because I really want these Solstice to shine!
  Reply With Quote
Old 11th February 2011, 12:12 PM   #2
StevenZ is offline StevenZ  United States
diyAudio Member
 
Join Date: Jul 2010
I think he's measuring the excursion of the driver itself.
  Reply With Quote
Old 11th February 2011, 05:00 PM   #3
Urchinn is offline Urchinn  United States
diyAudio Member
 
Join Date: Feb 2008
Ok...tell me about the "excursion of the driver." Please?
  Reply With Quote
Old 11th February 2011, 05:40 PM   #4
frugal-phile(tm)
diyAudio Moderator
 
planet10's Avatar
 
Join Date: Oct 2001
Location: Victoria, BC, NA, Sol III
Blog Entries: 5
Look at the cone as it is moving. Level one is when the cone moves 2 mm, turn it up a bit it moves 4mm. This is actually a fair amount. I usually get at least a week on them at lower levels before i do anything.

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 11th February 2011, 06:25 PM   #5
StevenZ is offline StevenZ  United States
diyAudio Member
 
Join Date: Jul 2010
I'd suggest getting a metric measuring tape and eyeballing it from the side until you think you've reached the recommended excursion per break-in level. Keep in mind 2mm is barely above 1/16" and 4mm is right around 3/16".
  Reply With Quote
Old 11th February 2011, 10:09 PM   #6
diyAudio Member
 
markaudio's Avatar
 
Join Date: Nov 2008
Hi Guys,
The measuring idea is good an then eyeballing is likely the most effective.

Remember, were talking about the MAX length of movement under a "shock load" like the sudden thump-role of a drum, big clash of symbols etc. etc. Under these loads, the travel of the powertrain (cone,coil and suspensions) must not exceed those distances I've already given. That means for the vast majority of the run in period and general play, the powertrain hardly moves.

In a well designed driver/cab combination, pleasing bass can be generated without the need to use lots of large driver excursion.

I'll look at the running in section, see if I can further elaborate.

Thanks

Mark.

Last edited by markaudio; 11th February 2011 at 10:12 PM.
  Reply With Quote
Old 11th February 2011, 10:21 PM   #7
Henkjan is offline Henkjan  Netherlands
diyAudio Member
 
Henkjan's Avatar
 
Join Date: Jan 2006
Location: Berkel en Rodenrijs
Mark, does this running in procedure also apply to the other gen.2 drivers?
  Reply With Quote
Old 11th February 2011, 10:21 PM   #8
ra7 is offline ra7  United States
diyAudio Member
 
Join Date: Feb 2009
Blog Entries: 1
Mark,

Probably a better way to specify breakin would be to say:
Pink noise - 70db@1meter for 100 hours, 80db@1meter next 100 hours and so on. This is much easier to approximate than eyeballing excursion.

Once you've got your amp calibrated to these levels, you can play music instead of pink noise.
  Reply With Quote
Old 11th February 2011, 10:23 PM   #9
diyAudio Member
 
markaudio's Avatar
 
Join Date: Nov 2008
Quote:
Originally Posted by Urchinn View Post
Okay, tomorrow we build the Solstice cabinets and install the Alpair 12s. My next dumb question (hey, I gotta learn somehow!) concerns the break-in period. Mark suggests 2mm for 20 hours, and 4mm for 200 hours. Okay, I have no idea what that means! Is 2mm the volume of a normal conversation at a dinner table? Is 4mm the volume of your TV? Any help would be wonderful, because I really want these Solstice to shine!
Hi Urchin,
To help you:

1 - First 100 hours, use low volumes like hotel lobby background music levels. You can easily hold a conversation without raising you voice. Don't use any music with a heavy beat. Sweet vocal, gentle Jazz, any music that's easy listening will suffice.

2 - 100 to around 300 hours, gradually introduce some music with beat/bass and carefully increase the volume to "entertainment" levels. You can still hold a conversation by slightly raising your voice. Don't go nuts, give this process time. Remember, most (if not all) full range drivers aren't big "rock un rollers".

I talk about Xmax (mm) distances for those DIYer's who've got allot of experience in driver handling and maintenance so my apologies for the lack of presentation for beginners.

Cheers

Mark.
  Reply With Quote
Old 12th February 2011, 01:45 AM   #10
diyAudio Member
 
markaudio's Avatar
 
Join Date: Nov 2008
Quote:
Originally Posted by Henkjan View Post
Mark, does this running in procedure also apply to the other gen.2 drivers?
Hi Henkjan,
Yes it does. In fact, I'd recommend this type of run-in for most any low mass full-ranger.
Thanks
Mark.
  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, Alpair 6M wushuliu Swap Meet 5 11th February 2011 07:33 AM
Alpair 10.2 break-in box? mctavish Full Range 22 31st January 2011 05:28 PM
Alpair 12 vs Alpair 10.2 and a little Fostex 166 germpod Full Range 4 28th January 2011 03:19 PM
Alpair 10 more forgiving than Alpair 7 & 12 tripathdude Full Range 3 6th November 2010 06:14 AM
Alpair 10 vs Alpair 12 buzzforb Planet 10 hifi 0 30th October 2010 06:56 PM


New To Site? Need Help?

All times are GMT. The time now is 08:31 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