[sirwhale]

Acousticado is right that the Carbon Fibre crossovers are good to look into. The main two being the Emerald X20 nylon, and the Rainsong Parlor Nylon.

The only wooden crossover I have come across that has a full classical body and no electronics is the Cordoba C9 crossover and the Cordoba C10 crossover.

I tried the C10 (spruce & rosewood), but I sent it back for the C9 (cedar & mahogany), which I prefer. I did this with a very well know and large German store.

In terms of them being loud enough to play without an amp, what context is this in? Mine are definitely loud enough to play at home, and louder than the acoustics I have had. I wouldn't know if they are loud enough for other contexts. If I were to do a concert, I'd use my crossover with electronics. But I prefer the C9 for playing as it has a better acoustic sound.

Basically these guitars are classical guitars, with a modified neck.