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 tablejockey

I have a B3, essentially the sames box, but you have the 12" woofer.
When I see my B3 looking like the woofer is going to jump out of the cabinet, usually means 1-system is cranked and the particular recording is "hot" on the low end, so gain needs to be turned down. I don't keep my sub at one supposedly "perfect" level. While it can be left alone for casual listening and not cranked, ALL recordings are different, so I adjust accordingly. I think REL got it right with the remote for the Gibraltor series.
The second is the actual record.iIf it isn't perfectly flat, when cranked, the movement of the arm over the warp is going thru the cart.
After countless sessions over the years, my REL permanently resides behind the listening position, about equidistant to the floorstnders.
All setups , rooms are different so my experience may not even apply in your setup.
Incidentally, my REL is on Mapleshade brass/slab which I've found not only a nice looking, but sonic tweak. Consider it, if you haven't already.
My floor stander have the same setup.