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Adjustable sound ports?
http://w-ww.luthiersforum.com/forum/viewtopic.php?f=10102&t=13785		 Page 1 of 1
Author:  Tim McKnight [ Wed Sep 26, 2007 12:05 am ]
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Does anyone have any pictures of or links to adjustable sound ports? I am thinking that Linda Manzer had a sliding door on one of her designs but I can't find any pics of it. There may be others so I would appreciate any help that you can share.
Thanks...
Author:  grumpy [ Wed Sep 26, 2007 12:53 am ]
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Search for 'blue guitar collection' or something similar.
Author:  Brock Poling [ Wed Sep 26, 2007 12:57 am ]
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If you find the answer to this question... can you post it or shoot me the solution too. I have been thinking about something similar.

I "think" Linda must be using some kind of drawer slide guides on the insides, but I don't know that for sure. I also seem to recall seeing a Monteleone with adjustable ports.

Author:  Josh H [ Wed Sep 26, 2007 1:02 am ]
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Tim,


Yes, Linda Manzer has (or had at one point) a sliding door design and so does Grit Laskin. I heard Grit give a little lecture earlier this year and if I remember correctly (don't hold me to this) he said that he no longer does the door because it is to much work and the guitar always sounds better with the port open. Grit has a picture of his first sliding door port in his book A guitar makers Canvas. The picture in the book is a bit blurry but it looks something like this.



If you have more questions about this design it wouldn't hurt to contact Grit. I have emailed him a couple times with different questions and he has been very helpful with his information. I don't really know how the mechanism for the sliding ports is designed but I think I remember reading that the design for these ports involved leather.


Hope that is of some help to you.


Josh


 


 
Author:  Ricardo [ Wed Sep 26, 2007 1:16 am ]
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How about putting a round adjustable air deflector used in the dash of a car?  Just joking.
Author:  Michael Dale Payne [ Wed Sep 26, 2007 1:47 am ]
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I would have reservations about doing this. It would seem to me to lend its self to inducing a rattle unless there was some way to increase tension on the gate or lock down the gate some way.

It seems to me the benefit vs the headaches just not really worth it.
Author:  grumpy [ Wed Sep 26, 2007 2:02 am ]
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it is to much work and the guitar always sounds better with the port open

On my first port a few years back, I suggested to the owner that we make a door, to adjust or close the hole if he wished to. He answered back that it would always be open, and he, too was worried abotu introducing something that could rattle. I'd not made a ported guitar at tha point, but he owned 2 already, and he knew it would never be closed.  Good call <bg>

I still think a tambour type door would be cool(I believe that's what Linda did), but, not for any practical reason.

I've been messing around with baffles and the like, leading to the port, and that is very interesting: it's like having a 20 slider EQ. The car-vent type thing is not as crazy as it seems....
Author:  Josh H [ Wed Sep 26, 2007 2:46 am ]
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I just remembered seeing this guitar go through the 12 Fret website a year or so ago. Take a look at the tuned side port Here
Author:  Josh H [ Wed Sep 26, 2007 2:47 am ]
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I don't know how the tuned port works or what its advantages are. But it is interesting...
Author:  Don Williams [ Wed Sep 26, 2007 2:51 am ]
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Wood veneers over a sheet of flexible magnet, with a metal plate inside. You can just pop it off and move it around as you want.
Or, wood veneers over sheet metal, and strong magnets epoxied on the inside.

Piece O' cake.
Author:  Kristopher10 [ Wed Sep 26, 2007 2:56 am ]
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I have been thinking about this too for some reason... I was thinking about using an iris-like contraption (like a camera shutter). How??? I have no idea. Just a thought.
Author:  LuthierSupplier [ Wed Sep 26, 2007 4:30 am ]
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I know Kent Everett does a really cool door on his soundports using swivel arms with springs to keep it from rattling around. I'll see if I can find a pic. But you might want to contact him directly and ask.
Tracy
Author:  Kent Chasson [ Wed Sep 26, 2007 4:37 am ]
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I believe Linda Manzer at HGF seminar this year also said she no longer uses the door because it always stayed open.
Author:  rlabbe [ Wed Sep 26, 2007 6:12 am ]
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I talked to Linda about it when she exhibited at the Blue Guitar show at the Smithsonian. Her implementation was slick, but she told me that it was a lot of work to no real purpose.
Author:  RWGoodman [ Wed Sep 26, 2007 6:18 am ]
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The ergo guitar from Charles fox has a sliding door option.


http://www.ergoguitars.com/


 
Author:  Allen McFarlen [ Wed Sep 26, 2007 7:16 am ]
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Here is a link to a picture of the sound port that Linda builds.

http://www.manzer.com/web/index.php?thisid=176
Author:  TonyKarol [ Wed Sep 26, 2007 9:06 am ]
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Linda's door slid in a curved, L shaped bracket glued to the inside of the side area, one on either edge of the door itself (make the door a long rectangle curved the same as the side). It (the ledge) was lined with leather to stop rattle, and to be a bit snug to be able to set the door at a certain opening size.

Grit only did a few that way, and then stopped, because no one ever closed it !!! Waste of time.
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