Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5

Reproduction Speaker Grill Cloth Buzzing...
#25

Warren, yes it is obvious the paper won't let air through. I used paper as an exaggerated example of what the cloth is doing as an experiment. If you go back and read my threads I think I stated that I actually left an air opening around the paper (not sealed completely) and it buzzed like a mother. There is no way to really show you how dense the material is via a picture online but it is VERY dense and does NOT allow hardly any air movement through it, unlike the original material which is very porous and almost transparent and designed for maximum air flow. My point was this new material is almost as impermeable as a sheet of paper and indeed both have similar results.

Gluing the entire cloth down now is out of the question without ruining it. I have mimicked gluing the entire cloth down by securing the loose areas with my hands and even a cut piece of cardboard with a circle in the center for the speaker opening to secure the material and I found there is still noise. I am now thinking the noise is not be from the material buzzing against the baffle or cabinet itself but something else. I am wondering if this new material is causing back pressure against and creating resonance in the speaker cone and possibly issues or misalignment of the voice coil and causing voice coil rub, the sound is very similar to that. But again without material covering the speaker, even at FULL Volume and strong signal, the speaker sounds A-1 but the moment you put something that severely restricts air flow over the speaker you get the buzzing. Again still an issue caused by the new material and only remedied by replacing it with a more acoustically friendly speaker cloth.


Messages In This Thread
RE: Reproduction Speaker Grill Cloth Buzzing... - by bastardbus - 10-05-2015, 02:35 PM



Users browsing this thread: 2 Guest(s)
[-]
Recent Posts
Model 96 cabinet veneer
I can't figure out what the first step is, let alone the final step. I have tried copying pictures from my hard drive a...TGLager — 01:40 PM
Philco 38-2 Low Volume
I managed to get some more time on this. Hi Mr. FixIT, The radio has been recapped. Many of the resistors were rep...dconant — 01:39 PM
Philco 38-2 Low Volume
Thanks guys for the help. I started looking at these points but I have to quit for the day. I will be looking into this ...dconant — 12:23 PM
RCA WV-98c
Check out this crazy zero pot operation. Touching it drives it crazy. Its rubber tipped. Also the 6al5 has no negative v...daveone23 — 12:08 PM
Philco 38-2 Low Volume
If you check all of that and still have a problem (my first inkling would be one of the 6F6s) then look at the 6J5 phase...RodB — 10:44 AM
RCA WV-98c
Those will probably depend on teh switch combination. Could you list some that you see, their values and what they sh...morzh — 10:26 AM
Model 96 cabinet veneer
You are probably skipping the final step. Once you select the photos you want and they get downloaded, the system assign...RodB — 09:36 AM
RCA WV-98c
At this point, there is no input, just internal voltages Which are incorrect and not sure what they should be.daveone23 — 09:15 AM
Philco 38-2 Low Volume
Hi DConat, Generally, the lower the plate voltage the less negative the grid voltage has to be. Since the plates an...MrFixr55 — 09:27 PM
RCA WV-98c
If I had it in front of me, I would triy to trace the signal on one of the non-working functions. Try to trace and high...morzh — 08:21 PM

[-]
Who's Online
There are currently 1221 online users. [Complete List]
» 1 Member(s) | 1220 Guest(s)
Avatar

>