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A Dual Showman should be fine with an 8 ohm load, with no modifications.
I've got a '67 Twin Reverb in a combo cab driving a 8 ohm 15" speaker (I've
used both a JBL K130 and a Rola? bass speaker). I've had it in this setup
for years with no problems. In fact, a 4 ohm rated head running an 8 ohm
load will have a reduced total output (probably in the range of 60-70W for a
DS) and a darker tone than with a 4 ohm load. Conversely, a 8 ohm rated
head running a 4 ohm load will run hotter than stock, and has a brighter
tone than with the expected load. Never go outside the half to two times
expected load range with a vintage Fender. I wouldn't count on amps from
other manufactures as being able to support anything but the expected load.
As for the tone ring cabinets, the tone ring suspends the speaker in the
center of the port. I never measured exactly, but I think the port on the
Showman cab is about 18" diameter. The bass response on these cabinets is
amazing, and the chrome dustcap on the JBL peeking through looks so cool!
Mel
-----Original Message-----
From: Brian Neal [mailto:]
Sent: Tuesday, July 29, 2003 5:38 PM
To:
Subject: RE: [SurfGuitar101] Re: what's with "Dual"
I bought a Dual Showman ('66) this year. 85 Watts with 2 x 15" speakers.
Like Phil said, the only difference between a Dual Showman and a Showman
is
one resistor and the output transformer.
Fender was inconsistent about the faceplates though. Sometimes they said
"Dual Showman" on them and sometimes they just said "Showman" even though
they were technically Dual. Mine just says "Showman"
You need to check the output transformer code to be sure it is a Dual
Showman. Although some of them do indicate Dual Showman on the tube chart
(mine doesn't). I can look up the codes for you if you want.
The stock speakers used were JBL-D130F's or JBL-D140F's. These are 15"
speakers. I don't know where you got 13" Jerry, I've never heard of
that....?
I would be wary about running a Dual Showman through a single 8 Ohm
speaker
load for very long....! My amp tech told me that I could do that, but only
if I pull 2 of the power tubes first (and yes it does matter which ones,
but
I've forgotten which ones he said; I think it was the two outside ones BUT
DON'T QUOTE ME ON THAT).
$500 dollars is a good price I think if it is a black face. Make sure its
not a silver face (not that their bad, its just you can get those a little
cheaper maybe) or one of the early 1980's red knob Dual Showman. Be warned
though, you will want to get new tubes and have the electrolytic
capacitors
replaced if they are original. This will add maybe $200 or more depending
on
what tubes you get and who you have work on it.
Again, I'm talking about black face Showmans above. There are the earlier
blonde ones, then after the black face models came the CBS silver faces,
and
then there were the red knob Showmans (not related at all really).
The Fender Field Guide is a great resource as is the Fender Forum for
learning about these things:
Having said all that....I am really knocked out with my Showman. It far
surpassed any expectations I had and continues to amaze me. I can't
believe
that tone is coming from my guitar and hands! If I only had the chops to
match!
Good luck!!
BN
> -----Original Message-----
> From: Bill Bergstrom [mailto:]
> Sent: Tuesday, July 29, 2003 4:01 PM
> To:
> Subject: [SurfGuitar101] Re: what's with "Dual"
>
>
> Guys,
> Thanks so much for all the help and guidance.
>
> The guy offered me $500 (probably plus tax)
>
> I'd probably be willing to take him up on it, assuming it can at
> least put out some signal, and would work alright with the single 15"
> cab. I just appreciate that cab so much more.
>
> Naturally, I'd still need to track down a cab, make sure it has a
> Jensen D130F in it, and I'll probably re-tube it (unless that's been
> done recently).
>
> Does this sound like a good deal? Or should I play it cool for a
> little longer and see if something pops up?
>
> ~Bill~
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