Re: Works for the guitar.

There is a classical guitarist who plays with his guitar in the cello position. His guitar has an endpin, and he has a large box that must work like the cello box.

A hard top won't work. It needs to be like a soundboard. If you have ever played with a music box mechanism, you will find all kinds of things that it just lights up. Hard surfaces are not among them. Basically you need a thing like a music box. Having it protected with a hard surface makes sense. The post is a interesting system. What a guitar/cello is, is an air pump. So as long as you pump the air out of the box. The surface of the soundboard, is the diaphragm of the pump, it is not to the same extent, the speaker cone, moving air off it''s surface. I mention this in case on feels the air will get trapped in the box that contains the soundboard. It might not be as good as another design, but conceptually it will still pump.

There is an acoustic principle that applies here. Some people who try to increase the volume of natural instruments pursue the approach of the box, most often by modification of the instrument's box. The principle being that the instrument should resonate over a wider area. But the counter to that is that the energy available does not increase, so one is just diffusing it. And this is what classical guitar players report, they don't always get more volume, but a richer sound, which is important on the guitar as the volume of the sound box is not sufficient to establish the fundamental of the lowest notes (I don't know what the case is with the cello. If you have ever seen a Guitaron, you will see one approach to dealing with that. Possibly more logical once one has pursued the upright playing position. Of course, Cellos have a lot more power available, due to the bow.

So if you are not dealing with more volume in some simple way, but tone and completeness, then you are in a very difficult situation where the box needs to really be a sound box, and compliment the guitar. That is the mount everest of instrument making: making a box (within or outside the instrument) that actually plays as the luthier intended. Making a nice guitar is one thing, but making one that is nice and exactly the instrument one envisaged (dictated in this case by the presence of the principle instrument), that is some task.

© 1998 - 2017 by Ellis Walentine. All rights reserved.
No parts of this web site may be reproduced in any form or by
any means without the written permission of the publisher.