Hoffman Amplifiers Tube Amplifier Forum

Other Stuff => Cabinets-Speakers => Topic started by: DLPublic on July 12, 2016, 03:57:59 am

Title: SCRIM
Post by: DLPublic on July 12, 2016, 03:57:59 am
Do you think this could be used for speaker cabinet scrim, i.e. behind the grille cloth?

MILITARY SCRIM NET SCARF 1M ARMY SNIPER VEIL HUNTING SAS DISGUISE WIND SAND

It seems to be a cheap way (i.e. £5.99 on fleabay) if it is suitable.
Are there any other options?
Dave
Title: Re: SCRIM
Post by: kagliostro on July 12, 2016, 04:55:53 am
I am afraid the texture might be too weak for that use


Franco
Title: Re: SCRIM
Post by: HotBluePlates on July 12, 2016, 07:05:48 am
Why do you need something behind the grill cloth?
Title: Re: SCRIM
Post by: DLPublic on July 12, 2016, 07:46:22 am
HBP,
Quote
Why do you need something behind the grill cloth?

To provide additional protection for the cone?
Also, I thought as the scrim is glued it will dampen any flapping of the grill cloth against the baffle.

Am I wrong?
Are scrims so last century?
What do others use?

Franco,
Quote
I am afraid the texture might be too weak for that use
Many thanks for the heads up.  How stiff/strong should it be?

Dave
Title: Re: SCRIM
Post by: kagliostro on July 12, 2016, 08:15:27 am
To me if you really want to put there something for protection a very light metal mesh is what you have to use

something like this

(http://www.sfb.it/UPLOADS/c49b20c2e_big.jpg)

Franco
Title: Re: SCRIM
Post by: Willabe on July 12, 2016, 09:02:08 am
Also, I thought as the scrim is glued it will dampen any flapping of the grill cloth against the baffle.

But the grill cloth doesn't go directly against the baffle board. There is a strip of wood, say 1/4"T x 1/2"W, that is glued to the baffles perimeter. It lifts the speaker cloth up off of the baffle board so it doesn't come in contact with the baffle board and flap against it.   
Title: Re: SCRIM
Post by: DLPublic on July 12, 2016, 09:23:14 am
Willabe,
Quote
But the grill cloth doesn't go directly against the baffle board. There is a strip of wood, say 1/4"T x 1/2"W, that is glued to the baffles perimeter. It lifts the speaker cloth up off of the baffle board so it doesn't come in contact with the baffle board and flap against it.
Now I did not realise that and have not allowed for that extra depth in my design and I have just finished cutting all the cabinet boards to size. :cussing:

Will have to think something out.  Told you I was new to this!!!
Dave
Title: Re: SCRIM
Post by: Ed_Chambley on July 12, 2016, 09:47:31 am
If you are internally mounting your speaker and want additional protection, just put another piece of grill cloth on the inside and sandwich it between the speaker and baffle.  I have some thin padding I use if I have a bright speaker.


I have built cabs both ways, but prefer not to have the frame.  I prefer the use the baffle board.  I simply put a small piece of trim around the baffle board to hole the grill cloth up about 1/8th inch so you do not see the speaker cutout edges.  If you do it this way, it is a good idea to put glue on the retaining bolts.  That way after you tighten them down once they will not back out if you change speakers.
Title: Re: SCRIM
Post by: hesamadman on July 20, 2016, 12:56:06 pm
There most definitely is a point where if you restrict the air too much, the air from the speakers will rattle the crap out of the speaker cloth. And it can get LOUD! I've done it. Totally not necessary to add additional protection there. If you need it, use metal.