Click title to read one, or click date to read all below it.
12-15-08
" i think i'm leaning more toward living with it than p ... Mapman
12-15-08
Simpler is usually better, imo. i'm even bothered by the ide ... Ptmconsulting
12-15-08
Hi guys, i guess you dind't see the smiley face after the &q ... Acoustat6
12-15-08
Hi mapman i re-read your post and saw "isn't" as o ... Acoustat6
12-15-08
Hello everyone, i also am experiencing, what i would conside ... Markpao
12-15-08
Markpao, best to minimize it as much as possible through be ... Mapman
12-15-08
Yup it's the nature of the beast my next phono stage will h ... Musicfile
12-15-08
Mapman, i posted a response earlier today, but for some reas ... Maril555
12-15-08
The pumping woofer does not just use up available amplifier ... Eldartford
12-15-08
Maril, yes, it is a valid concern worth investigating. Mapman
12-15-08
the solution i just got around to using is a good, and eas ... Islandmandan
12-21-08
Here's an update. i bumped into michael fremer. he suggested ... Ptmconsulting
12-21-08
Fwiw, some speaker manufacturers build subsonic filters into ... Mapman
12-21-08
Mapman...a passive rumble filter would require large and exp ... Eldartford
12-21-08
Eldartford, i've seen the ohm sub bass activator device. it ... Mapman
12-21-08
The filters mentioned here are only masks trying to cover up ... Koegz
12-22-08
Greetings all, as i've mentioned early in this thread my diy ... Fap
12-24-08
Koegz said, "the "rumbling" or "pumping& ... Acoustat6
12-24-08
Acoustat6 in your post i am not sure what you were suggestin ... Koegz
12-24-08
In 100% of the cases i've seen over the years where "ru ... Mapman
12-24-08
Hi koegz, i was indeed suggesting that your system is not re ... Acoustat6
12-24-08
I do suspect some cartridges with higher compliance (stiffer ... Mapman
12-24-08
Bob#2 - as much as i don't like to say it, because it might ... Ptmconsulting
12-24-08
Mapman, you mean lower compliance... 04rdking
12-24-08
Acoustat6 you must be reading a diferent post then i am. ptm ... Koegz
12-24-08
04rdking, yes, i got it backwards i think. i did mean &quo ... Mapman
12-25-08
Hi koegz, i am sure your system is capable of great sound, y ... Acoustat6
12-25-08
"i believe that all lp systems would benefit from 20z ( ... Mapman
12-25-08
The kicking of the drum or the pluck of a base string can be ... Koegz
12-25-08
It depends on whether what's happening below 20hz is related ... Mapman
12-27-08
I got some 180gm acoustic sound lp's for christmas. i have t ... Ptmconsulting
12-27-08
Hi bob, i agree, i too have some lps that have lots of low f ... Acoustat6
12-27-08
I just received a pair of those 20hz fmod rca filters. does ... Markpao
12-27-08
Put them at the preamp output. they are intended to be used ... Eldartford
12-27-08
Ptmconsulting; i am confused, are you talking about cone mov ... Koegz
12-27-08
There is cone movement on both. it is not audible on my spea ... Ptmconsulting
12-30-08
Hi bob#1, you said, "it is not audible on my speakers ( ... Acoustat6
12-31-08
When i say it's not audible i mean the woofers are pumping b ... Ptmconsulting
12-31-08
Disconect sub i agree. thickness of the vinyl, no way. i hav ... Koegz
01-02-09
Just wondering ... the vpi platter is not supposed to be use ... Ptmconsulting
01-02-09
There is no doubt that thinner vinyl is more susceptible to ... Mapman
01-22-09
Markpao said "i just received a pair of those 20hz fmod ... Acoustat6
01-22-09
Too bad that more phono preamp manufacturers don't provide a ... Stevecham
01-22-09
Stevecham, probably because it would raise costs and even p ... Mapman
01-22-09
"too bad that more phono preamp manufacturers don't pro ... Hdm
01-22-09
Hello acoustat6 and all, first off let me make it clear that ... Markpao
01-22-09
Hi markpao, you said "yes, i did receive the 20hz subso ... Acoustat6
01-23-09
I don't know if anyone has suggested this yet, but try switc ... Eldartford
01-23-09
Let's see, subsonic filter, rumble filter how about an air f ... Koegz
01-24-09
I was having the same woofer pumping problems with my scoutm ... Srwooten
01-25-09
Koegz said, "let's see, subsonic filter, rumble filter ... Acoustat6
01-25-09
Hello srwooten, just curious, what cartridge did you upgrade ... Markpao
01-25-09
Hey acoustat6, i knowlonger own the 800d's. i have had duel ... Koegz
01-25-09
Markpao- a zyx airy 3. Srwooten
01-26-09
I too have contemplated this problem. i get pumping woofers ... Davidsss
01-26-09
..have you tried removing the squishy balls and tried the ta ... Stringreen
01-27-09
Squishy balls didn't help. however, the balanced idea has me ... Davidsss
04-17-10
I have bass cone movements every 30 seconds lasting for a fe ... Calle_jr
06-06-10: Actusreus
Nice thread. I stumbled upon it by accident. I'm posting since the last post is from April this year so I figure it's ok to keep it alive.
I'm with the camp that rumble/flutter/woofer pumping is part of the vinyl experience. If you don't experience it, then count yourself lucky. My setup is fine on paper but on certain records the woofer pumping was insane. It didn't seem to have much to do with record warps.
I think whether anything in the signal path causes a deterioration in transparency or affects sound quality is a moot point if your system is experiencing a rumble problem despite attempted mechanical fixes. The woofer pumping will have a much worse effect on the sound than a good quality filter that will relieve the amp from trying to reproduce LF signals that are not audible, and the woofers from unnecessary and stressful movement that with time will most likely cause damage. To me it's a silly argument to make. We're not talking theory, but practice; you're not listening on paper but with your ears and observe with your eyes.
For those who want a ready solution: get a KAB rumble filter. I got one, I'm in vinyl nirvana every time I listen to records, no woofer pumping, no distortion, no audible sound compromise; in fact, the sound has improved.
Actusreus (Threads | Answers | This Thread)
06-07-10
My rumble went away when i decided to change out my cartridg ... Ptmconsulting
06-07-10
Bob- i am wondering, did this help with all you lp's, or jus ... Srwooten
06-08-10
This solved the problem on all the lp's that i have played s ... Ptmconsulting
06-08-10
Maybe your dyna, while still functioning fine varied from th ... Cpk
06-08-10
Thanks for your reply bob. i know that a lot of vinyl has ru ... Srwooten
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