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Horning Eufrodites - help needed with boomy bass

Hi Eufrodites' users,

Can anyone help me with solving a serious issue of boomy bass?
Speakers are about 7 months old.

Do they still need time to break in?
Room acoustics? at first I thought so but the boominess is even at very low levels of sound.
I play them mostly with Jadis JA100 and the Sati 520b from Horning too. Boominess is on both setups.

Help!!!! There's nothing more annoying than boomy bass. I just can't enjoy music anymore.
Help!!!!

Thanks.
amuseb
theaudiotweak
2,805 posts
 
Well there is a Paris Kentucky and I reckon the word reckon is used there many times a day as it is in Louisville, that other French name sake.

I'd have to ponder the variovent and how many and what size. That's probably more than just drilling a random hole I reckon. As far as material to place in the vent well that would be long hair sheep's wool.

Before you do any other mods you must mechanically ground your speakers. And after doing so the speakers and the grounding components will take a few days to settle in. There are several other enhanced grounding methods that could be applied to both the cabinet and the driver. All of which would improve performance and void the warranty. Tom
amuseb OP
81 posts
 
Tom, you reckon right, neither Kentucky nor Louisville is where base is.
Can you educate my layman self on what the mechanical grounding elements are?
Regards from the city of lights.
audiokinesis
2,765 posts
 
"What material would be best to use for an appropriate stuffing?"

I'm not sure. With the towel, what you did was add flow resistance to the port; you made it significantly harder for the low frequency energy to get out of the port. If the towel was filling the port completely, then you added a lot of flow resistance; the more airspace around it, the less flow resistance.

My suggestion is, trial and error. Bigger towel, smaller towel, see which is a step in the right direction. Maybe open-cell foam (when you "haaaaah" into the foam, can you feel the heat form your breath on the other side? If so, then it' open-cell foam), again I can't tell you how completely you should fill port, or how deep the foam should extend into the port.

Long-hair wool was mentioned. That's great for stuffing a transmission line, but imo the intention here is different - we're trying to reduce low bass output, rather than facilitate it. Unless you packed it tightly into a cloth bag and crammed it into the port - then, it would be behaving more as flow resistance than as gentle damping along the length of the line. Imo you can accomplish the same thing for less money with tightly packed polyester batting or fiberfill.

The variovent is itself a flow resistance device, and one with a rather strong flow resistance, maybe more like packing the port tightly with a towel than like open-cell foam. You'd want to turn the cabinet almost into a sealed box, with the only pathway between the inside and outside being through the variovent (which is dense fiberglass compressed inside a plastic housing that has airflow holes in it).

Duke
amuseb OP
81 posts
 
I've stuffed into the ports a couple of polyester pillows I have here under hand.
So far the impressions are that the more stuffed, the better it is for the bass control.
With this understanding, Duke, would you have any fine tuning to make on your recommendations above regarding the material to be used?

How about using better feet for the speakers? There are a few guys that make sort of dedicated such spikes.
Would that add to the gig?

I highly appreciate everybody's help here with bringing me back to enjoying my system.
charles1dad's avatar
charles1dad
10,250 posts
 
Amuseb,
It`s good to know that such a simple (and cheap) solution has led to this level of improvement.Turning your speaker into a partially sealed box is obviously effective. I`m glad you can enjoy your system now.
Regards,
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