John Sayers' Design Forum

John Sayers' Recording Studio Design Forum

A World of Experience
Click Here for Information on John's Services
It is currently Tue Sep 21, 2021 1:14 pm

All times are UTC + 10 hours




Post new topic Reply to topic  [ 3 posts ] 
Author Message
 Post subject: ISO BOX FOR GUITAR AMP
PostPosted: Thu Mar 18, 2021 7:06 pm 
Offline

Joined: Wed Mar 21, 2018 4:45 am
Posts: 4
Location: Maribor, Slovenia, EU
Hi,

I intend to build ISO BOX FOR GUITAR AMP.

I am playing Gibson Les Paul, my amp is Blackstar JJN 20, 20-Watt Valve Combo.

I want to turn on the volume on the amp, so that the sound starts to build...

My question is, how big decrease in volume can I expect with iso box? I want to reduce the outside volume as much as I can...

Any ideas which is the best way to build it?

Thank you in advance, Marko


Report this post
Top
 Profile  
 
PostPosted: Fri Mar 19, 2021 2:29 am 
Offline
Moderator
User avatar

Joined: Wed Jul 13, 2005 3:55 am
Posts: 5177
Location: Old Tappan, NJ USA
a box-within-a-box - 20mm plywood with a 100mm gap between boxes - fill with sand. the lid will need venting or better keep the amp outside the box and only the speakers inside. if venting - build it like you would a room-to-room duct silencer and construct the lid like the box with the shell-sand approach to mass and damping. you should be able to get extremely loud inside the box with little exterior sound or vibration.

_________________
Glenn


Report this post
Top
 Profile  
 
PostPosted: Fri Mar 19, 2021 5:15 am 
Offline
Senior Member

Joined: Tue Mar 25, 2008 3:31 am
Posts: 561
Location: Cork Ireland
As Glenn said if you build it with decent mass and sealed, very little sound will get out.
But note that a part of the sound of electric guitar is often the acoustic feedback from speaker to string.
I recorded an album here with the BlackStar 1 Watt amp!. I would love to hear the 5W one.

_________________
DanDan FitzGerald MIOA MAES
http://www.irishacoustics.com
http://www.soundsound.ie


Report this post
Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 3 posts ] 

All times are UTC + 10 hours


Who is online

Users browsing this forum: No registered users and 20 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Jump to:  
Powered by phpBB® Forum Software © phpBB Group