Alembic Guitars Club

Connecting => Miscellaneous => Topic started by: lbpesq on April 22, 2008, 06:31:55 AM

Title: Question about old Fender closed-back cab
Post by: lbpesq on April 22, 2008, 06:31:55 AM

I just picked up a '66 Bandmaster head and cab with the original Jensen 12s. (Ain't it cool - real '60's vibe).  The cab is closed back.  When I opened it up to check it out, I found what looks like pieces of insulation stuffing inside.  This is my first old Fender closed-back.  Is the stuffing stock?  What does it do?  I suspect I should remove it.  Any info, thoughts, suggestions appreciated.  Especially if you know something about old Fender cabs.
 
Thanks,  Bill, tgo  
 
(http://club.alembic.com/Images/449/51034.jpg)

Title: Question about old Fender closed-back cab
Post by: grateful on April 22, 2008, 06:54:09 AM

Love the paisley Bill.  I've never experienced a closed back instrument speaker, but the sound generated by the back of the speaker cone has nowhere to go so needs to be absorbed; hence the stuffing.  So I'd leave it there:  I would imagine it'll be less efficient (quieter!) than an open backed cabinet.
 
Mark

Title: Question about old Fender closed-back cab
Post by: 811952 on April 22, 2008, 07:56:29 AM

The stuffing makes it act like a larger box.  It may need to be replaced if it's falling apart, or you might want to even add a little.
 
Awesome amp, by the way!
 
John

Title: Question about old Fender closed-back cab
Post by: olieoliver on April 22, 2008, 07:59:55 AM

Now that is one COOL amp Bill.
 
OO

Title: Question about old Fender closed-back cab
Post by: cozmik_cowboy on April 22, 2008, 08:28:18 AM

I am in awe of the extreme grooviness of that rig!  What a find! A physical & emotional match for Woody, Irv OR the '61 Strat, I would think.  Should you ever want to unload it..... And yes, every closed-back cab I've ever opened had the insulation - leave it.
 
Peter

Title: Question about old Fender closed-back cab
Post by: tbrannon on April 22, 2008, 09:14:49 AM

Am I the only one who gets annoyed with most cab makers for almost always making cabs slightly smaller than your normal rack/head unit?  Does it have something to do with the # of cuts out of a standard sheet of ply and not wanting to waste wood/maximize profit?
 
Cool stack Bill- sorry for the anal retentive hijack, but it's always bugged me and around here somebody ALWAYS has the answer!

Title: Question about old Fender closed-back cab
Post by: keith_h on April 22, 2008, 09:45:54 AM

Well in this case Toby it is the owner of the equipment that has created the mismatch. :-)  
 
This cabinet was intended to be used with the speakers set horizontally. I've see this occur with other brands also where the owner sets the cabinet vertically.  
 
Keith

Title: Question about old Fender closed-back cab
Post by: pace on April 22, 2008, 01:06:27 PM

Bill, its an off white/yellow fiberglass style insulation right?  
 
last time I opened mine, that's what was in there....

Title: Question about old Fender closed-back cab
Post by: lbpesq on April 22, 2008, 04:20:03 PM

Yup, off white/yellow fiberglassish.  Each speaker has 4 pieces, about 12-14 x 6, just laid across the back of the speaker.  I've been poking around the net and have seen some suggest that the foam should be mounted on 3 continuous surfaces.  Is this preferable, or is is just as effective to leave it covering the speaker backs?
 
Bill, tgo

Title: Question about old Fender closed-back cab
Post by: wideload on April 22, 2008, 04:26:50 PM

Were you seeing the paisley before you touched the mysterious cabinet stuffing, or did it appear shortly thereafter??!
 
Larry

Title: Question about old Fender closed-back cab
Post by: lbpesq on April 22, 2008, 10:02:33 PM

What paisley?
 
 
hehehehehe
 
Bill, tgo

Title: Question about old Fender closed-back cab
Post by: cozmik_cowboy on April 23, 2008, 07:53:43 AM

I've never seen the insulation laid on the speakers - always attached to the sides & back.
 
Peter