Anyone wish they had a rumble subsonic filter?


I sort of do. I see my woofers moving due to ultra low frequency signal when I play certain LPs. Doesn't affect the sound, but I don't like it. Anyone have a solution for rumble, since modern preamps no longer seem to have subsonic filters? Scoutmaster on a Gingko Cloud 10 on a solid rack on a cement floor, is what I have.
240zracer
I was going to add a high-pass filter at 18Hz to my woofer crossovers, but that passive method requires some very large caps and inductors. Might have to revisit that. Also noticed the Bellari phono preamp has a rumble filter. Pretty nice feature on an inexpensive unit.
Some phono preamps have them built in. I am running a Sim Audio LP 5.3. The filter is engaged with a jumper.
Actually, if the phono preamp is where this circuit would be, if it existed, I don't see why it isn't a feature on all phono preamps.
240zracer...The 18 Hz rumble filter attenuated everything. The mix-to-mono approach can use a much higher frequency, although 180 Hz does sound a bit too high. If you don't use a subwoofer you will need to buy a line level device. But you don't need to buy a whole new preamp.
Hello, I use a 20hz filter which I believe is necessary for any LP playback system. Since my system is very capable of reproducing low bass I also use a rumble filter which monos the signal at 38hz. 180 hz is too high to sum to mono. Try the 20hz filter first then if you still have a problem you may need a rumble filter. The two types of filters are for two different problems and 20hz is the first one to address.

This all depends on your system and its bass reproduction abilities ie: tonearm/cartridge and table interaction and its bass reproduction and your speakers ability to reproduce low bass. I think stereo reproduction is important to at least down to 50 hz and lower if possible.

My 20hz filter and the rumble filter are in the Marchand Bassis.
Bob