2. analog
  3. 1437254109

Woofer pumping WHY??

Hello All, I have an older REL B2 series. I love this sub. I recently received a new Project Xtension 10 with Clear Audio Maestro Ebony v2. After a couple days I noticed bad woofer pumping on several records I like to listen too. When I brought it up to Needle Doctor they told me it was my records and said it worked fine in there store. Now my REL is blown! I am so upset at myself for not taking this matter more seriously. Now I am purchasing a KAB rumble filter because I am not going through this again. Is this a cartridge mismatch?? Because on my REGA with Dynavector 10X5 It did not do this woofer pumping nearly as bad. AND I do remember putting a DENON DL103 on my RB301 and this same woofer crazy action occurred!! Immediately took it off that arm. I just spent $4100 for this Xtension10/CA Maestro and now I am scratching my head. Hmmmm.
128x128mattmiller

Showing 1 response by audiotomb

audiotomb's avatar
audiotomb
1,112 posts
 
I had a big woofer pumping issue

In my case we finally isolated it

The bearing in the tonearm wasn't moving properly so there was cyclic woofer movement as the cantilever took the brunt of the motion

We did a feather test suggested by Thom Mackris and that was it

A tonearm tune up and no more issues

One of my threads on it

http://forum.audiogon.com/cgi-bin/fr.pl?eanlg&1400370649&read&keyw&zzwoofer=pumping

What is your flooring type, turntable rack / isolation?
Is it more apparent on the outside grooves of the record?
Is it cyclic or keyed to loud passages or bass heavy parts of the music?

Search engine is your friend

I found 8 threads putting in the words woofer pumping
More to discover