From the AMPAGE Tech Talk BBS...

Name: Bob S.
E-Mail: XXXXX@xxxx.net
Date: 10/4/99 8:18 PM
Subject:Re: Marshall stack sound in a small 5 w amp... Can it be done?

I have a box that we made for the studio and it's purpose is designed to
be able to crank up the amp in the control room and still here the
monitors. It goes like this: it's 30" tall ,18"x 18" deep and wide. There's a baffle in the middle and it's loaded with a 12" V-30. the backside of the
speaker has insulation around it and the front side is open in space whichs allows a goose neck for a mic to place around the cone as you desire. It has an
access door (12"x 12") that seals when closed. You plug the amp speaker
wire in to the panel jack the along with a mic cable and you're ready to
go! I plug an AC-30, a 50 Watt Marshall or whatever, and it's pretty
darn quiet.

You can never substitute girth, punch and cahonies for a small watt amp.
I wonder if you could build a second access door with small bleed holes
for a little more outside tone ?


> I just went and measured the box and here are the specs:
> It's 30" tall, 18" wide and 18" deep. The access door is
> 12.5" wide and 10" high. The speaker baffle is centered @
> 15" with a hole in the center large enough for a 12"
> speaker. The backside cavity is lined with 3.5" fiberglass.
> To load the speaker and install fiberglass you must enter
> through the access door. The speaker installs after the
> soundproofing and seals that side of the cab. The cone side
> of the box has a 9" gooseneck with a permanent mic clip
> attached. The speaker is attached to a side plate 1/4" jack,
> along with an XLR for the microphone. I also used a layer
> of fiberglass on the cone side to keep resonance down.
> Make sure to have a good access door seal and tight fit
> because there is high sound levels and you will get rattles
> and noises if the design is not tight! As for low frequency
> hump, it's not bad. A V-30 will work better than a classic
> 80 because it has a larger low end hump.
>