Like many others on this forum, I have gone to acoustic jams with an acoustic bass guitar (ABG) and been disappointed that no one could hear it when the other instruments were playing. This happens even in small groups. Typical ABG bodies are just not large enough to produce much acoustic volume. Does anyone else want a very large ABG, roughly the size of an Ernie Ball Earthwood, for use in jam sessions? I want like one, and I have found a luthier, Alistair Hay of Emerald Guitars, who can build one out of carbon fiber, and, I believe, make it playable. A one-off custom instrument is beyond my budget, but if enough of us are interested, we could either split the development and tooling costs or convince him to make it a production model. If this sounds good to you, keep reading and reply to this post if you would be interested in buying something like this. The present best in class ABG's, the Emerald XB34 and Tacoma Thunderchief, can be heard acoustically if there are one or two guitars in the mix and the players are not strumming too hard, but beyond that the bass gets lost. http://www.emeraldguitars.com/products/basses/xb-34-bass/ http://www.premierguitar.com/archive/reviews/tacoma.htm In the past, there have been some very large bodied ABG's, such as the Ernie Ball Earthwood and the Maton Bindarra, that had more acoustic volume, but were difficult to play because of their shape and size. Side note: despite being 30-40 years old, hard to play and uneven in build quality, Earthwood basses presently sell for $3K to $5K, depending on condition. http://uniqueguitar.blogspot.com/2009/11/it-is-hard-to-imagine-acoustic-bass.html http://www.docstoc.com/docs/36083723/CW80-6-and-12-String-and-B60-Bindara-Bass I had a ThunderChief for seven years and it was challenging to play, especially at first. A larger body with the same form factor would be even harder to manage, but the right shape could make a large bodied bass playable. The four major problems I had with the ThunderChief were: balance due the neck being heavy, having to reach too far to get to the lower frets, the edge of the body digging into my right arm and having to crouch over the body to see the frets. The balance and reach problems were solved by an improvised version of the Strapture. See attached photo. I used a heavy shoelace, but any sturdy string would work. As you can see, this trick would work with almost any body length. I played with the neck at a 30° angle to reduce the arm digging, but it never went away completely. A cutaway on the upper rim, similar to the Emerald XB34, would fix this. The only alternative I found to crouching to see the frets was to sit down and angle the bass toward the ceiling, but that made the body dig into my chest. The best way I can think of to fix this would would be a wedge shaped body somewhat like a Guitarron or the Rigel bass. http://en.wikipedia.org/wiki/Guitarrón_mexicano http://www.rigelinstruments.com/publish/abg.shtml Another benefit of the wedge shaped body is more physical volume, which translates to more acoustic volume. Another side note: I did consider the Rigel bass, but the archtop acoustic guitars I have played tended to have lower volume and less bass than flat-tops. I suspect the same will hold true for an archtop bass vs a flat-top bass. My initial thought would be an XB34 with a longer and wedge shaped body, say 28" long by 18" wide by 9" deep at the bottom tapering to 5" at the top. Compared to 20.25" x 17.25" x 5.25" for the XB34, this would roughly double the physical volume of the body. The Earthwood (24.5" x 18.25" x 6.675") has a different body shape, but I believe the total physical volume would be similar. Of course, the final size and shape would be subject to analysis by Alistair for playability and aesthetics, and the cost will depend on how many people want to buy one. Why carbon fiber? A large wood ABG would be heavy; carbon fiber can be ergonomically shaped more easily than wood, and carbon fiber tends to have more acoustic volume.