Jump to content

Acoustic Research woofer and mid range driver tests


Recommended Posts

I don't know if this will be useful to anyone. From earlier conversations on the forum I thought I would post this information. If anything it will help illustrate the differences between some of the AR drivers produced over the years. I must say that I am pretty impressed these mid units seem to have weathered the years rather well. All are labeled. I am surprised the AR91 / AR92 drivers performaed as they did. Many drivers that contain ferro fluid change due to the migration of the oil component, thickening the fluid. I noticed this effect on the Allison midrange units I have and had in my lab. 

 

-T

AR dome mid AR3a SN1 mfg date 12-15-1972.jpg

AR dome mid AR3a SN2 mfg date 10-03-1969.jpg

AR dome mid AR5 SN1 mfg date 04-23-1973.jpg

AR dome mid AR5 SN2 mfg date  11-04-1972.jpg

AR91 AR92 dome mid PN 200032 SN1.jpg

AR91 AR92 dome mid PN 200032 SN2.jpg

Link to comment
Share on other sites

  • teknofossil changed the title to Acoustic Research woofer and mid range driver tests

I ran some tests on the (3) AR 12 inch woofers I have. One is the AR1W woofer from my late uncles system, the other two are the P/N 200003 woofers supposedly from a set of AR 91 systems. I replaced the surrounds which were purchased from John at M-Sound not long before he disappeared. Please note the P/N 200003 woofers are not broken in  and I would expect the Fs to decline a bit and possibly some of the other parameter to change as well. Even though I had the surround kits for a few years I only replaced them last year (2021) and have not done anything else with them other than verify they operate (with no rubbing). So a moderate grain of salt should be taken with these test results.

AR 12 in woofer AR1w SN1 mfg date 05-unk-1956..jpg

AR 12 in woofer AR91 PN  200003 mfg date 02-01-1981 SN1.jpg

AR 12 in woofer AR91 PN  200003 mfg date 02-01-1981 SN2.jpg

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

 Share

×
×
  • Create New...