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Suggestions for 'filling the port' of bass reflex

I've been demo'ing a pair of full range/single driver speakers for a few weeks and have now gone back to my floorstanders that have a port for the mid-bass and bass drivers...well, it's a little overwhelming now and I'd like to tone it down a little.

Suggestions for what to use....besides a sock?

Thanks, L'wood
lwood
samujohn's avatar
samujohn
291 posts
 
I had good results cutting soda straws to the length of the port and then simply packing it full. This reduces turbulence and overload without changing the tuning of the port. Using fabric, wool etc. impede the air movement is not only a gamble, worst case it can damage the speaker.
pugstub's avatar
pugstub
64 posts
 
I've used filter wool refills from a tropical fish pet shop. You can buy large bags of it for a few dollars.
williamredburry
51 posts
 
Try an Acoustic System pro resonator ( copper) for internal use. It brings a lot of good things !!!!!!!!!
rodman99999
3,557 posts
 
The bonded dacron that I suggested will turn some of the acoustic energy in the port to thermal energy, and thereby damp it's resonance. Done correctly(not crushed or tightly packed), it won't impede the woofer's motion. It certainly will not damage the system in any way.
jdoris
852 posts
 
George Short and North Creek appears to favor the approach suggested by Samujohn: he shipped straws with the Eska kit I purchased (rear ported). I've not compared the straws with other materials, tho. John
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