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 9 responses by mattmiller

Ok now I am saying that its not a bad cartridge arm match because I am getting amazing sound from the main speakers. But I still have this rumble problem and the only way I know to get rid of it is to buy a rumble filter. Anyone have a highend turntable and experience bad cone movements?? I think these excessive cone movements might have damaged my REL'S voice coil?? Because now its making scraping sounds and I had to move it out of the system :-(
Ok I'm connecting the sub with the Spkon cable and all three leads to the back of the amp, Otherwise wont the amp then SEE the REL in the system? Before I got the new table I had been using the REL for quite a while with no problems ever. The REL is plugged in to the wall using a 3 prong cable (both the spkon and power cord are from Signal Cable). I do see the woofer pumping on the main speakers too, and this seems to occur more toward the outside of records im playing. The Sound is very very good. If that says anything. But this cone movement needs to be addressed. I'll do a little more troubleshooting and get back soon. Do a lot of vinyl spinners use outer rings?? I see that most of the HIGHLY re guarded phono preamps Don't have subsonic filters? Like my MS Phonomena. I don't think my phono stage is the problem. I respect every ones input thank you. Stereo5 you sound like my older brother..LOL that's what he keeps telling me. He has a KAB. Yogi, Wouldn't the sound be bad or unpleasant with a bad arm/cart combo? because the sound seems to be gorgeous! Al, Im using unbalanced cables to amplifier and my speaker cables are spades, the REL Spkon cable is Bannanas on amp side. I have a concrete floor with carpet. Salamander rack with Mega spikes. Yogiboy, I think is on to something, but the sound is so dam good? So I am perplexed.
Cartridge is 8.5g and Tone arm is 8.5g's, the frequency calc says 10...12 being ideal. So is this a bad match?? It says no. It seems to be in the GOOD RANGE. I AM GOING TO PUT MY dYNAVECTOR 10x5 ON THE ARM AND SEE WHAT HAPPENS. nEEDLE DOC SAYS THEY WILL LET ME SWAP FOR A DIFF CARTRIDGE I just want to make sure which one I should go with.
Breaking NEWS !! I think I'm getting really OLD because now I put the REL back in the system with my digital it sounds fine??? I am going to play some more vinyl and see if it still occurs, but for now all seems well again !!!
So I can sit there and see my system has a heartbeat. When I play any vinyl it goes 4 very quick beats then nothing then 4 very quick beats and so on... it even speeds up when I play 45's! WTF is going on ??? Its a brand new table. this HEARTBEART is in my main speakers and the REL. I am going to put my REGA back on the same input and see what happens.
Well with the REGA it dosent make the cyclic pumping action ( I still get a little subsonic pumping but not to bad). Im going to try a block of granite under the table, to increase self mass. Going from the REGA to the PRO-JECT was like lifting a veil off my system, I cant go back. I think the Project is picking up music from my system because everything is so close together in my room. Does that make sense??
I don't have much faith in the "higher mass shelf theory" but Its easy for me to test that one. I really think the new Project Xtension 10 is not the problem. All the table has done is push a lot more music through the system than before. Also, made it a lot more sensitive to play vinyl. I have 2 cheap phono preamps and I think one is even going bad. So, there is a lot going on that's not good right now. This is very interesting to me also though. I am sure there is a resolution coming soon.
So, I received a large piece of granite from a good friend. I placed that under the TT and it really helped calm things down. I still get some woofer action, not always. I think it is in the records we play and the only way to really stop it is to buy a subsonic filter. I took the Pro-ject apart (to fix the cable connection) and put it back together again being super careful with the belt and everything. I was able to listen to music and it was awesome! I really want to thank all of you who have tried to help me trouble shoot this problem.

Matt