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Helmhotz resonators for audiophile at almost no cost and without calculus...

The importance to treat the room if you have speakers, even in nearfield listening like me, is imperative ...

Here is my advice: 

Buy some big  empty wine bottles, or drink them before, it is optional....Or use some carafes, the kind that some display at the center of a table....I use plastic  wrapping sheets to tightly seal the aperture of the bottles and the carafes after pouring in them around 10 % of water in their volume space...You must listen and experiment for your taste and room to determine the exact amount of water to boost the frequencies that will benefit….After that  I peirce the plastic sheet with a needle and I insert a  thin straw with only the extremity of the straw at the top...  That its! You know have an Helhmotz resonator... 

You now have one of the more astounding tweak for a room that will transform your listening space in sound heaven ...I use more than 15 of them in my little audio room and trust me that is one of a kind upgrading...

I wrote that for those who want to experiment, the others can stay silent...My best to all...
128x128mahgister
boxer12
8,655 posts
 
Thanks Mahgister
rpw
46 posts
 
Is it possible to post a picture, I would like to see the position of the straw.

Thanks
rdk777's avatar
rdk777
568 posts
 
+1 on pictures - that would help.

Thanks.

geoffkait's avatar
geoffkait
23,365 posts
 
You can find sound pressure peaks using an empty sealed box and a test tone (for example 315 Hz). Walk around the room holding the box with test tone playing moderately loud on REPEAT. When the box starts to vibrate in your hand that’s where a sound pressure peak is located. Some places where you will probably find these sound pressure peaks are room corners on the floor and ceiling, first reflection points on wall and floor, about a foot directly above speakers, behind and in middle of speakers at rear wall, on floor in front of and in between speakers. Just placing a vase or bottle on top of speakers should be audible although it may hurt the sound if not pre-designed, I.e., just an arbitrary vase/bottle.
mahgister's avatar
mahgister OP
12,910 posts
 
Thanks Geoff I had already identified some of these spots with my experiments... I will probably go on with your idea with a sound level apparatus...Luckily it seems that the dimension of a carafe or wine bottle plays positive role in my small room approx. 17 feets by 15 feets by 15 feets...The diameter of the straw,the length of the straw and the volume of the carafe or the bottles are certainly in a acceptable range relative to the room size, because the improvement is spectacular... I will sleep on the calculus...My best to all...

 I already have some bottles behind my speakers in between and behind my back on the wall facoing the speakers... Some bottles are near the ceiling ,some are on the lateral wall on shelves, some in front of windows...
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