ARCHIVED FORUM -- March 2012 to February 2022READ ONLY FORUM
This is the second Archived Forum which was active between 1st March 2012 and 23rd February 2022
My speakers rattles/vibrates once in while while playing my Beogram 4002. I don't think it's my speakers because it doe not rattle when I use my cd or portable player or fm station. I think some of it has to do with vibration but it also rattles once in a while even if I play music in low volume. Does the tracking arm needs adjustment? I acquired this Beogram last year. Using with Mcintosh Mx113 preamp, Mcintosh Mc 2015, Mcintosh Mc101 equalizer, currently with Earthquake Saturn Orbital speakers and Super Nova sub. I will try to post a video when it happens again. I will appreciate any inputs. ThankYou.
How new is the cartridge? It may be you have a worn stylus. Have you loosened the transit screws on the base of the turntable? If working , the suspension is excellent and the 4002 was often described as dance proof. The only other suggestion I have is to check the tracking weight.
Peter
I am understanding your description to mean your speakers are playing sounds that are the sound of something rattling or vibrating rather than your speakers physically rattling. Usually speakers cause other things in the room to shake and rattle. Like Peter said, if you don't have the Beogram transport locks unlocked then your Beogram is not operating with its suspended chassis. That would pick up extra vibration from the environment and make its way back to your amplifier and speakers via the phono cartridge. And as Peter said, a faulty cartridge could be picking up unwanted sounds. So check those things first. Also check for the vibration with the bass attenuated way down, then back up and see what effect that has on your problem.
The Beogram 400x suspension is very good though. I have a Beogram 4000 and an 8002 on the same shelf as a large speaker and they are immune to any speaker vibrations when I play my music loud.
-sonavor
Acoustic feedback?
Martin
Dillen: Acoustic feedback? Martin
Agree, but is suspension is working and turntable not actually on speaker, shouldn't really happen. Try with lid down and up and see if changes.
Thanks for the inputs! I'll try to look for suspension issues first. I have heard of demo that they "slammed" the cover and it did not skip a beat. I tried jumping on the floor and it did skipped, if it's not the suspension I'll go to whatever suggestion are offered, arm or cartridge issue.
alpha101cl
It is sounding more like a suspension issue but as Peter suggested, double-check the tracking force setting on your Beogram cartridge. Do that check using a tracking force gauge. Don't go by what the indicator on the arm says. If that was out of calibration you may not have enough tracking force which could be causing the needle to bounce.
I check the the transport lock this weekend and they were set to play, although not fully turned, which I did. Next I will check the tracking force and balance. I don't have the tracking force gauge. Can i use other brand gauge or does it have to be B&O?
Other Brand will do I use one of these
Collecting Vintage B&O is not a hobby, its a lifestyle.
Sorry I was not able to update sooner. I have to order the tracking scale and been busy with work. After testing It was only .76 grams. Adjusted it to .97gms. But I thinks the source of the problem was the grounded line from the turntable, at the
RCA plug. I think it got pulled hard when I was rearranging the unit placement. Probable not realizing i was pulling on it due to the weight of the pre-amp. I will try to listen to it more intently with different records in the next few days.
Sorry for not getting back sooner. I have to order the tracking scale and been busy at work. It was only .77gr when i tested it. Adjusted to .97gr. But I think the problem is from the grounded output line from the Beogram, at the junction of RCA. It must been pulled hard when I was rearranging the units, not realizing it due to the weight of the pre-amp. I did and temporary fix by cutting an extra RCA and connecting it to the output line of Beogram. I will listen to it more intently in the next few days and will update of any issue. Thanks
Sorry Admin for the duplicate post. I thought they did not go thru at first.
a follow up to my post
I found out what's causing my speaker to produce the rattling sound. It was equalizer from my old set up. I was using a McIntosh Mq101. I also tried it with another equalizer, a Yamaha and it was doing the same thing. It seems to amplify the vibration. I just disconnected the equalizer and NO more rattling sound. Its sound fine and I don't miss the equalizer!