Everyone is talking as if the rumble filter were merely a high pass filter. Actually, a rumble filter mixes the two channels below a certain frequency without affecting pass band (although there is often a subsonic filter included that does that). LPs produce signals which are mono at low frequency. Stereo signals involve vertical modulation of the groove, and will result in tracking problems, so record producers mix to mono at low frequency. Therefore, any stereo signal you see at low frequency is NOISE alone, and the rumble filter gets rid of it.
Woofers Gone Wild
Rega P3 with 301 arm/Sumiko BPS III. Even at lower levels, woofers in my B&W 803's are going nuts, flopping around all over the place (and I would imagine, sucking up lots of juice in the process).
Is there compliance mismatch here? From what I can tell, all should be well within the desired range. But still the woofer action.
TT is equipped with Black Diamond Racing footings, and is well placed. All adjustments on table checked/rechecked.
Am going to have a beer and not think about it for a while. Any others with this situation, or any solutions out there?
Thanks for any help,
Doc
Is there compliance mismatch here? From what I can tell, all should be well within the desired range. But still the woofer action.
TT is equipped with Black Diamond Racing footings, and is well placed. All adjustments on table checked/rechecked.
Am going to have a beer and not think about it for a while. Any others with this situation, or any solutions out there?
Thanks for any help,
Doc