Well, the fiberglass lining in my speakers has thinned out, so I think I need to replace them, either with new fiberglass sheet or with something like Monacor MDM-3. The speaker in question is a pair of JBL 120Ti, by the way.
The question is: should I better disassemble the speaker enclosure (taking off the back panel, for example), or can I do it fine through the driver holes? The woofer is 12", so for the lower part of the speaker, I guess I could insert my hand fine to insert the new fiberglass sheet, as well as lining it properly to the inside wall.
The upper part is another story. The only hole available is the tweeter hole. My hand can fit, but naturally the hand's movement is not as free compared to inserting it from the woofer hole below, not to mention obstructions like the bass port tube. I imagine I could have more freedom to press the fiberglass against the inside wall if the port tube is removed, but the tube is very hard to remove (I haven't been able to remove it).
I noticed some members of the forum has replaced/added fiberglass lining to their speakers (like on
this thread and
this thread.)
So here is the stupid question: do you have to disassemble your speaker cabinet to replace its dampening material? Or can you do fine through the driver holes?
I guess the easiest side to disassemble the 120Ti enclosure (if I have to, but I hope I don't) is taking apart the backside panel. If the back panel is opened, then it would be easier to re-line the new fiberglass sheet (or Monacor MDM-3) to the inside wall of the cabinet. But I just don't have the heart to pry it open. In fact, I believe the proper way is to use wood glue dissolver to the joints, then carefully open it. But I'm totally inexperienced in this matter.
How did you guys replace the fiberglass lining inside the cabinet? Did you do just fine through the driver holes?
And while we're at it, how do you take off the bass port tube?
Many thanks.