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Re: Spit speakers

To: Joe Curry <curry@wolfenet.com>
Subject: Re: Spit speakers
From: msecres@ibm.net
Date: Thu, 22 Jan 1998 23:18:40 -0800
Cc: triumphs@Autox.Team.Net
References: <199801221751.RAA09854@renata.umds.ac.uk> <34C78EF3.BD57B73F@wolfenet.com>
Joe Curry wrote:
> 
> Julian,
> I have two oval 8" dual coaxial speakers mounted on that removable panel 
>behind the
> seats on my '63 Spit.  The aftermarket panel is strong enough to support the 
>weight
> of the panels with no noticable effect.  The sound is adequate, considering 
>that
> the Spit is noisy on its own and the speakers have to compete with the Monza
> Exhaust system.  However, It seems to be the only logical space to mount the
> speakers and get proper separation.
> 
> If it is a problem with sound bleeding out the back and around the edges, you 
>can
> install covers behind the speakers to trap the sound.  I would fabricate them 
>out
> of some kind of heavy cardboard and line with foam rubber.
> 
> BTW, I don't have the details of your Spit for the International Spitfire 
>database
> I am compiling.  Please provide the following.
> 
> Year
> Model
> Color
> Commission Number
> Owner
> Location (City, County, Country)
> 
> Regards,
> Joe Curry
> 
> J.Daley wrote:
> 
> > I've just got a new radio/cassette for my Spit 1500 and am trying to
> > optimise the position of the speakers.  At the moment I have 2 speakers
> > in the rear panel behind the seats.  This is not ideal, as far as I can
> > see, for at least two reasons
> >
> > 1.  The panel is very flimsy.
> > 2.  The panel is not well sealed so that sound from the rear of the
> > speaker can leak round the edges.
> >
> > So from a theoretical point of view this setup should sound pretty bad,
> > although it may be that if the leaks are small compared to the volume of
> > the boot (of course the petrol tank is in the way) this problem is a
> > small one.  Has anyone got any practical experience ?  Would reinforcing
> > the panel with some plywood or something make much difference ?
> >
> > I'd also like to put a pair of speakers in the doors, but looking at
> > it, it looks like there is very little room.  Again, has anyone played
> > around with door speakers ?
> >
> > I'm not looking for the ultimate in high fidelity, just something that
> > doesn't sound too offensive.
> >
> > Julian.
> >
> > [Third attempt - Does majordomo reject mail if the From: field doesn't
> > match a subscriber to the list ?  I usually send mail from a different
> > account to the place I read mail, so that may be the problem.]
> > 
>_______________________________________________________________________________
> >                 Julian Daley, Dept Phonetics, University College London
> > _______________________________ j.daley@ucl.ac.uk 
>_____________________________
> 
> --
> "Thanks to the Interstate Highway System, it is now possible
>  to travel across the country coast to coast without seeing
>  anything." -- Charles Kuralt


Depending on the size of the speakers (i.e., around 6 inches in diameter), 
mounting them 
on the rear side panels is not really a problem.  Those cardboard pieces don't 
have a 
lot of strength, but enough for this purpose.

As for fitting covers to the backs of the speakers, Joe, I believe this would 
only 
reduce their effiency.  Speaker cones vibrate on two sides -- the front and the 
back.  
Enclosing the back is fine, as long as your create a port on the front mounting 
surface 
so as to relieve the back pressure -- i.e., "sound" -- coming from the backside 
of the 
speaker cone.

More to the point -- it don't hardly make no damn difference when you driving 
with the 
top down, the tailpipe blaring, and the rattles rattlin'.

--
Martin Secrest 
74 Spitty
73 GT6

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