Tolerances on AV15 - diyAudio
Go Back   Home > Forums > Loudspeakers > Subwoofers

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 1st August 2006, 12:00 PM   #1
diyAudio Moderator
 
pinkmouse's Avatar
 
Join Date: Apr 2002
Location: Chatham, England
Default Tolerances on AV15

I'm quite frustrated by this driver, and would appreciate input from anyone else that has measured it.

My results, after two days of running in at 16Hz are shown below. They don't seem correspond with the listed parameters, even slightly.
Attached Images
File Type: png av15.png (16.7 KB, 225 views)
__________________
Rick: Oh Cliff / Sometimes it must be difficult not to feel as if / You really are a cliff / when fascists keep trying to push you over it! / Are they the lemmings / Or are you, Cliff? / Or are you Cliff?
  Reply With Quote
Old 1st August 2006, 06:33 PM   #2
sreten is offline sreten  United Kingdom
diyAudio Member
 
Join Date: Nov 2003
Location: Brighton UK
Hi,

Where is it sourced from ? can't find it. /sreten.
  Reply With Quote
Old 1st August 2006, 06:39 PM   #3
Did it Himself
diyAudio Member
 
richie00boy's Avatar
 
Join Date: Nov 2003
Location: Gloucestershire, England, UK
Those look so bad parameters that I can't help feeling something must be wrong. Would you be prepared to try another measurement method?
__________________
www.readresearch.co.uk my website for UK diy audio people - designs, PCBs, kits and more.
  Reply With Quote
Old 1st August 2006, 06:39 PM   #4
diyAudio Moderator
 
pinkmouse's Avatar
 
Join Date: Apr 2002
Location: Chatham, England
Oops, I thought I put that link in...

http://www.mcaudio.co.uk/specs/AE%20specs.pdf
__________________
Rick: Oh Cliff / Sometimes it must be difficult not to feel as if / You really are a cliff / when fascists keep trying to push you over it! / Are they the lemmings / Or are you, Cliff? / Or are you Cliff?
  Reply With Quote
Old 1st August 2006, 06:44 PM   #5
diyAudio Moderator
 
pinkmouse's Avatar
 
Join Date: Apr 2002
Location: Chatham, England
Quote:
Originally posted by richie00boy
Would you be prepared to try another measurement method?
I'll try anything at the moment. My SW setup does seem to be accurate though, measurements on other drivers do correspond pretty well to published datasheets...


Additional info- that is measured with the coils in series to give a 4Ohm load, the souncard doesn't seem to like driving 2ohm loads. When I get home, I might try using a power amp to buffer the signal to a few watts
__________________
Rick: Oh Cliff / Sometimes it must be difficult not to feel as if / You really are a cliff / when fascists keep trying to push you over it! / Are they the lemmings / Or are you, Cliff? / Or are you Cliff?
  Reply With Quote
Old 1st August 2006, 07:27 PM   #6
Did it Himself
diyAudio Member
 
richie00boy's Avatar
 
Join Date: Nov 2003
Location: Gloucestershire, England, UK
Well try the power amp and see how you go. Have you measured 4 ohm loads before?
__________________
www.readresearch.co.uk my website for UK diy audio people - designs, PCBs, kits and more.
  Reply With Quote
Old 5th August 2006, 01:00 PM   #7
Vikash is offline Vikash  United Kingdom
diyAudio Moderator Emeritus
 
Vikash's Avatar
 
Join Date: May 2003
Location: UK
How hard are you driving these? I normally take drivers to mechanical excursion limits to really stretch out the surround and spider. Being a large driver it might take longer than usual possibly.
__________________
"The human mind is so constituted that it colours with its own previous conceptions any new notion that presents itself for acceptance." - J. Wilhelm. (But I still think mine sounds better than yours.)
  Reply With Quote
Old 5th August 2006, 01:10 PM   #8
Vikash is offline Vikash  United Kingdom
diyAudio Moderator Emeritus
 
Vikash's Avatar
 
Join Date: May 2003
Location: UK
Also, it's such a large driver so are you able to hold it up vertically with good clearance around for measusuring? You might get consistently bad readings if this was done motor down on a table...
__________________
"The human mind is so constituted that it colours with its own previous conceptions any new notion that presents itself for acceptance." - J. Wilhelm. (But I still think mine sounds better than yours.)
  Reply With Quote
Old 5th August 2006, 06:06 PM   #9
diyAudio Moderator
 
pinkmouse's Avatar
 
Join Date: Apr 2002
Location: Chatham, England
It was clamped in an open door frame for testing, I don't have a fancy jig like yours!

As I said above, I've put this to one side for the moment to try and decrease the pile of half finished projects littering my workshop. I suspect that longer running in may well be the answer, the only problem is I can't do anything else whilst I'm doing it.
__________________
Rick: Oh Cliff / Sometimes it must be difficult not to feel as if / You really are a cliff / when fascists keep trying to push you over it! / Are they the lemmings / Or are you, Cliff? / Or are you Cliff?
  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
Any Stryke AV15's for sale? jholtz Multi-Way 5 1st April 2010 12:05 AM
AV15 or RL-p15 or Tumult 15 Jose_L Subwoofers 19 31st March 2006 04:46 PM
Av12/Av15 available? Curt Badry Subwoofers 5 9th May 2005 06:40 AM
Sovtek 2A3 tolerances / defected tube? riku Tubes / Valves 5 25th June 2004 04:06 AM
tolerances of 1% metal film resistors Wagener Solid State 12 5th May 2004 03:50 PM


New To Site? Need Help?

All times are GMT. The time now is 09:40 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