Hi everyone!
It seems that recently I made a major discovery for which, I think, I should be given a Nobel prize. 😉
What I did was I switched off an active crossover in the subwoofer amplifier and put a large and thick pillow near a woofer. Thus the woofer is used as a full range speaker without any crossover but the woofer in the sub is closed or muffled by a pillow and hence I hear only bass up to may be 100Hz. I was amazed by the quality of bass in this set up which does not cost anything.
You just need a good woofer, a cheap amplifier and a pillow or a blanket. And that is all: no crossover is required and a pillow is used instead of crossover. The bass is fast and pleasant to listen to. Isn’t that wonderful?
As regards the fact that some people might think that in this setup the sound coming from the sub can be easily localized that is not the case.
I have installed my sub near the right speaker to the right of the speaker. If 100 to 200 Hz were coming out of the sub then I could easily hear the sound coming from the right speaker. But I do not hear any sound coming from the right. All I hear is just deep bass.
So this means that a pillow muffles sound very efficiently indeed.
I wonder if anyone has heard of this method before?
It seems that recently I made a major discovery for which, I think, I should be given a Nobel prize. 😉
What I did was I switched off an active crossover in the subwoofer amplifier and put a large and thick pillow near a woofer. Thus the woofer is used as a full range speaker without any crossover but the woofer in the sub is closed or muffled by a pillow and hence I hear only bass up to may be 100Hz. I was amazed by the quality of bass in this set up which does not cost anything.
You just need a good woofer, a cheap amplifier and a pillow or a blanket. And that is all: no crossover is required and a pillow is used instead of crossover. The bass is fast and pleasant to listen to. Isn’t that wonderful?
As regards the fact that some people might think that in this setup the sound coming from the sub can be easily localized that is not the case.
I have installed my sub near the right speaker to the right of the speaker. If 100 to 200 Hz were coming out of the sub then I could easily hear the sound coming from the right speaker. But I do not hear any sound coming from the right. All I hear is just deep bass.
So this means that a pillow muffles sound very efficiently indeed.
I wonder if anyone has heard of this method before?
Last edited:
There have been many downward facing woofer systems, which would give similar results.
This Empire is just one of many.
Empire grenadier 7000 — Polk Audio
This Empire is just one of many.
Empire grenadier 7000 — Polk Audio
You applied an acoustic filter, it filtered the highs as well as distortion harmonics resulting in cleaner sound. A 4th order bandpass would do similar
If the loudspeaker produces distortion, it id a good way to reduce harmonics,
Try to play a pure sine at 50 t0 80 Hz and put the cushion. A crossover wouldn't make any difference, there is no content.
I use this acoustic filtering in my own constructions with horizontal 360° upfiring chassis.
Try to play a pure sine at 50 t0 80 Hz and put the cushion. A crossover wouldn't make any difference, there is no content.
I use this acoustic filtering in my own constructions with horizontal 360° upfiring chassis.
