ARCHIVED FORUM -- March 2012 to February 2022READ ONLY FORUM
This is the second Archived Forum which was active between 1st March 2012 and 23rd February 2022
Over the last three years I've accumulated quite a number of beovoxes and some beolabs, the virus is absolutely present. I mostly use my redline speakers, especially my 140's. After a complete cleaning, refoaming, new caps and new cloths, they look (only need to order new straps) and sound great again. Indeed, the redlines are not the best sounding speakers there are, but they sound pretty good IMHO. However, there always is room for improvement
More specifically the acoustic absorption material. When searching the web and after talking to the guy running the local audio shop I learned that a closed cabinet needs to be filled up completely. In contrast a box with a bass reflex system, only the speaker walls need to be covered to get the best result. However, the inside of the redline speakers is almost completely filled up with acoustic absorption material. Furthermore the back of the redline's is covered with some hard rubber material.
Is there any reason for this unconventional looking solution? Has anyone tried them without the absorption material?
Any thoughts are appreciated. I will restore a pair of 60.2's soon to test different solutions.
Wouter
Wouter: Is there any reason for this unconventional looking solution? Has anyone tried them without the absorption material?
Yes. Tap on the lid of an empty shoebox and you'll have the sound.
Martin
Stuffing a speaker is not as simplistic as he made it seem. If you look at any decent s/w for doing low frequency box design, the options for type of fill are many, including fully stuffed, tight, loose, and inbetween, for bass reflex, and nearly empty for acoustic suspension. You can use the fill to alter the freq response and control absorption of reflected backwaves higher up in frequency. Most BR speakers are not fully stuffed, most sealed speakers are, but certainly not all.
Jeff
I'm afraid I'm recovering from the BeoVirus.
I think I will try some things and compare the results. Updates will follow.
Will be interested in hearing of your results!