Horning Eufrodites - help needed with boomy bass

This is a long shot, so consider it just the ravings of an insomniac:

It is possible that the enclosure is a transmission line/tuned port hybrid of sorts, and if so, you might be able to tighten up the bottom end a bit by lowering the tuning frequency. One way to do so would be to reduce the cross-sectional area of the port over its entire length.

Remove the stuffing from the port, then measure how far the port extends into the box (horizontally). Cut several boards that long, and just wide enough to fit into the port. Stack enough such boards in the port to roughly cut its cross-sectional area in half.

If the box functions as a reflex box, we've just lowered the tuning frequency somewhat. And that just might be a better "fix" than stuffing the port with damping material. If the results seem promising, find the optimum number of boards by trial-and-error, and then if you want to, glue and/or screw the boards together to make a solid block, and maybe wrap the ends with electrical tape or some such to give you a snug, rattle-free friction fit.

Theaudiotweak's suggestion of improving the coupling between speaker and floor may work very well, I don't know, I have less experience with that approach. I don't see how it could do any harm (unlike the things I've recommended, which very well could be detrimental, especially in the wrong dosages... but at least they're easily reversible).

Duke

Your first step should be to couple the speaker and then wait a few days for the unit to find ground. Until you do this properly your retuning of the enclosure may lead down a path of continual frustrating results. There are ways to mechanically ground a ported speaker so that no internal damping material is needed but probably not now in your case without serious intrusion. Damping will reduce dynamics coupling will not. Tom

Amuseb,
Tommy wasn't keen on the port damping approach apparently. Did he offer any suggestions for the bass issues you have? As the builder you'd think he knows this speaker better than anyone and could really help you.
Regards,

Hi there and thanks again for all the inputs.

Duke, I hope it's not over me that you're run into those sleepless nights.

Tommy isn't making many suggestions. He just says it's very uncommon to have such issues with the Eufrodites.

Jefferey of High Water Sound, Horning's importer in the US, recommends using either Eden Sound feet or Symposium bases for the Eufrodites. His recommendation isn't just for solving boominess but is a generic one.
Does anyone have any experience with those products?

Cheers.

I have found that putting speakers on a Symposium shelf will reduce the tendency for bass to boom, particularly if the flooring is suspended (not on a solid concrete base) and made of wood. I use Svelte Shelves (the thinnest Symposium platform) which is less than an inch thick. Other platforms are much taller. I would not say that platforms are a "generic" positive, they can make some systems sound too dry if that is already the tendency of the system. In other words, you will have to experiment.

If booming is an issue, energy absorbing shelves or footers like those by Stillpoint (also energy absorbing, and not designed to couple the vibrational energy to the floor) will be of help.