![]() These speakers are ported in order to get down there. I also have a pair of Aerial 10t's that get down about the same. I do not use a rumble filter with my horns because they roll off very quickly below 25Hz or so. I have two, 18" drivers in my bass horns that handle from ~100Hz and down. I use both active and passive filtering when I find it beneficial. Only you and your ears can tell us which works better for your speakers. In this case there is more of the power supply output available to reproducing the thwack of a kick drum rather than the rumble from the table. Many times there are sonic benefits to not feeding frequencies to an amp that it does not need to reproduce. However, you may also not be getting the full bass slam without using the filter. Not the dictionary, but the common sense in the design goal dictates it.ĥ1 beats per minute! What?!?! You a marathoner, Bob? -)ĭoes this mean I'm rolling off some bass and perhaps not getting the full bass slam I should ? ![]() Rumble filters such as KAB are designed to suppress sound waves of frequencies under 20 Hz, meaning they suppress sound waves that cannot be heard by the human ear, but are still reproduced by the amp and the speaker and cause the woofer pumping. However, before we let semantics get too much in the way, let's use common sense, shall we? Do you really think subsonic filters are designed to cut off the frequencies that travel below the speed of sound rather than frequencies that cannot be heard by the human ear but produce inaudible rumble? C'mon, you can't be serious! I don't know how fast sound waves of 20 Hz or less travel, but I do know it is generally accepted that 20 Hz is the lower limit of the human hearing. Granted, "sonic" is also an adjective used to describe something that has to do with the rate at which sound travels under another meaning, and "subsonic" generally means under the speed of sound. So "subsonic" can describe something that is below sound waves, meaning you cannot hear it. "Sonic" means having to do with, or using, sound waves. "Sub" prefix denotes "under" or "below" when attached to a word. For example, if the turntable is sitting high up on a less rigid platform, like the top of a cabinet in a room that is on an upper level of a dwelling rather than sitting on the solid concrete foundation, move it lower to the floor on a rigid, solid platform and away from the direct line of fire of the speakers. If you find it to be a significant problem on a consistent basis, you can eliminate or at least reduce the problem by tweaking the phono rig configuration (cart and tonearm matching) to change the resonance frequency, but that is a more significant undertaking that requires some expertise up front.īetter physical isolation of the table from the sonic energy transmitted from the speakers via the air and floor can also help. ![]() If you leave it off and it is needed, your amps power gets used up producing low frequency noise leaving little for the music,which can be a precarious situation in regards to sound quality at best and potential damage to speakers at worst. Whichever sounds better in your rig on particular recordings.
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