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I built these:
http://projectgallery.parts-express.com/speaker-projects/the-baronettes/
They sound wonderful except the bass is a little boomy (probably partially my room)
I've messed with other sealed speakers like Dynaco A25 and Snell K and the concept seems to be to dampen the boom away with extra stuffing because both of those are damped quite a lot.
Thanks for any and all suggestions.
Follow Ups:
If they are just getting put into service, as Airtime mentioned, break in period is extremely important. Typically speakers character change quite a bit in the first few hundred hours. This varies with drivers.
Also, if you've never acoustically treated your room I can't urge you strongly enough to experiment with that, best upgrade you are likely to make.
Instead of playing with stuffing, have you tried different stands, spikes, coupling or de-coupling tweaks?
Cheers!
Ed
"I know just enough to get into trouble. But not enough to get out of it."
What stuffing material did you use. For years I used good old insulation. Then the switch over to foam sheets come and every one was using that.
Me personally - I tried but was never able to get the same results with the foam. I went back to good old insulation. Try moving the speaker first but that is an option to consider later on.
I used GR Research No-Rez lining the cabinet walls and polyester stuffing loosely packed like Parts Express designer said. Upon further listening there are just certain bass notes that boom. I always use the Usher demo CD of Georgia On My Mind that starts with string bass in the left channel. It's recorded way too hot but it sounds cool. If you go to the GR Research website and look at the cabinet plans for the X-LS Encore, I use that bracing scheme. I really like how dead it makes the box.
I agree that the room placement is a better choice to start. If you used PE cabinets, the forward sections tend to be more resonant, and benefits from adding multi-layer Sonic Barrier. Not the thin stuff. While playing music feel around the cabinet and you'll notice what I mean. SB will also increase the acoustic space somewhat and lower the Q.As far as anything else, rather than guess though, I suggest measuring your problem if possible. It may be something else such as the wrong part or wrong wiring in the crossover sections.
Best,
E
Edits: 12/07/16
Adding damping can make the box acoustically larger which will decrease(improve) the Q(damping) of the box. But too much damping can make the Q too low and it will be tight but it will lose bass.
Also be careful to keep the damping away from the driver. Too close, especially if there's too much, can choke the sound of a driver and make it sound dull.
Also, just for accuracy, the A25 is not a sealed speaker. It is a damped port. There is no sound from the port but there is a controlled pressure release which improves the Q of the box making the bass tighter than it would be in a closed box of the same size.
Try moving your speakers away from walls and wall corners.
My dedicated music room, is a massive 10' x 10', so I'm kind of in trouble in that department.
Steve
the A25 is an unusual speaker in that it is very sensitive to "fill". But in a good way.
Get a piece of carpet padding or foam and just lay/wrap the back end of the woofer. If that worsens it go the opposite way Take out as much stuffing as possible. Sometimes that boominess is too much woofer. If you add more stuffing you could increase the woofer output = boominess.
Let them break in first and play around with positioning. also is there a subwoofer involved? That usually is the problem.
Have you tried moving them around the room to see if the response changes?
Happy Listening
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