Anders Nilsson
-
Posts
10 -
Joined
-
Last visited
Content Type
Profiles
Forums
Events
Posts posted by Anders Nilsson
-
-
19 hours ago, RoyC said:
Anders,
"...and recently bought a very nice pair of AR-3A improved."
Your speakers are not AR-3a Improved. They are the European AR-3a, which had the same cabinet.
Roy
Thanks Roy, That is valuable information to me. The badges are marked AR-3a improved, and they were advertised that way.
My guess is the speakers are built in 1975 in England. Is it possible to tell the manufacturing year from the serial number 03060?
/Anders
-
29 minutes ago, newandold said:
I’ve been collecting original spares on EBay for years....but you have to be very careful with whom you’re dealing.
That being said, and especially that it’s a 3A, it would be best to have that original rebuilt.
I have used Bill Legall’s Millersound in Landsdale PA and also Simply Speakers in FL.
Surely there are a few guys here with some suggestions of their own
Bill
Thanks Bill!
In Sweden where I live, I know of a well reputed speaker service company. I will contact them if needed.
I agree it would be best to have the original rebuilt.
https://www.hogtalarservice.se/
-
2 minutes ago, Aadams said:
The outer edge of the new surround is glued to the Masonite spacer ring. The woofer in the photos shows a ring later woofers don’t have the ring.
Alright, I see! The masonite ring seems firmly attached. Cabinet seems airtight when pushing the cone of the woofer. Relaxation time of the cone is long!
-
5 minutes ago, Aadams said:
Have you checked the attachment of spacer ring on the metal frame?
I did not notice any spacer ring on my woofer. Where is the spacer ring located?
-
3 minutes ago, newandold said:
Fortunately if that’s the case a woofer for that system can still be had.
Where do I find a replacement woofer, in case it has gone bad? Is it possible to find an exact match?
-
5 hours ago, Aadams said:
If it doesn't rub when you do a manual push test, you can further isolate by swapping the woofers to see if the problem moves. If it is the woofer and not in the wiring ,applying a signal directly to the woofer terminals would be my last choice after examining the cone and all of its attachment points. You can Wait for RoyC to reply. He probably already knows the answer from the sound in your video.
Adams
I now resoldered the litz wire from the voice coil at the terminal area, and have also applied a music signal directly to the woofer, outside of the speaker cabinet. I think it is more difficult to judge the distortion when the woofer is outside the cabinet, but outside the cabinet and already at moderate volumes, the woofer starts to sound bad, almost like a cone breakup.
No visible problem with the spider and no voice coil rub.
Tomorrow I will try the woofer in the other speaker cabinet to see if there is a difference.
Could the problem be related to a bad crossover capacitor?
-
21 minutes ago, RickB said:
Wow could be, but check for voice coil rub and a loose spyder(spider).
Thanks! That was also my thinking, but I could not notice any voice coil rub or loose spyder upon inspection.
-
16 minutes ago, newandold said:
Could be a bad solder from the voice coil to the cone.
Thanks! I will check that. Do you mean the soldering in the terminal area like on the picture?
-
Hi!
I am new on this forum and recently bought a very nice pair of AR-3A improved. I have limited experience and knowledge of speaker troubleshooting and would appreciate your help.
There is something wrong with one of the speakers as it sounds distorted already at a low volume and terribly distorted at higher volumes. I have attached a short video clip of the terrible distortion. Midrange and tweeter are disconnected in the video clip.
The crackling, distorted sound comes from the woofer as it remains when I connect the speaker in the subwoofer configuration (removing the tweeter jumper on the backside).
According to the seller, the speakers worked perfectly fine before they were shipped to me, but that is of course difficult to prove.
Where should I start the troubleshooting? What are the most likely causes to the distorted woofer sound?
To exclude a problem with the amp, I already reversed channels of the amp, and the distorted sound remains in the same speaker.
The amp is a NAD C320 BEE known to be very stable also at low impedances.
Greetings from Sweden!
/Anders
Distorted sound from woofer, video clip attached. AR-3a improved
in Acoustic Research
Posted
I swapped the woofers and distortion remains in the same woofer. No longer any doubt there is a problem with that woofer.
The return speed is faster (but still acceptably slow) of the bad sounding woofer, compared to the good one when depressing the cone. I have made sure the periphery of the woofer is airtight.
Attached video is well describing the distorted sound. It´s like the cone is not stiff enough and start to resonate at certain frequencies.