The Blackheart Killer Ant is another slightly unconventional choice. Features wise, the Killer Ant does not have even the basics found on most beginner amps, yet it costs more money. The only controls on the Killer Ant are a power switch and a volume control. However, what sets the Blackheart Killer Ant apart is the fact it is a tube amp, rather than the cheaper solid state amps used for most beginner amps.
Martin's OM, or "Orchestra Model", available from 1929 to 1933, has a rare combination of features. The joining of a long-scale (25.4") neck with a small body makes it an extremely responsive and playable guitar. In many ways the OM models were the first truly modern flattop guitars. They were the first Martins to have necks with 14 frets clear of the body. The OM has a wide neck (1 3/4" as opposed to the dreadnought's 1 11/16") which appeals to fingerstyle players. The string spacing is slightly greater at the bridge than on other models too, although not as wide as a classical guitars. The neck shape of old OMs is a bit unique too, although this is variable since each neck was handmade. OMs have a wide but thin backshaped V-shape which is very comfortable. Finally, the OM's smaller body size makes the guitar easy to hold, especially in the seated position. Compared this to the D dreadnought which is larger both in body depth and width (dreadnought players seem to use straps and stand up so the guitar's size is less of a factor).
The main purpose of the bridge on a classical guitar is to transfer the vibration from the strings to the soundboard, which vibrates the air inside of the guitar, thereby amplifying the sound produced by the strings. The bridge holds the strings in place on the body. Also, the position of the saddle, usually a strip of bone or plastic that supports the strings off the bridge, determines the distance to the nut (at the top of the fingerboard).

Semi-hollow body electric guitars are basically a middle ground between a solid body electric and a fully hollow body electric guitar. Jazz, country, and rock guitarists alike may gravitate towards semi-hollow body electric guitars for several reasons. One of the main reasons is that semi-hollow body guitars still produce that rich, resonant sound of a hollow instrument, but they typically have a solid or sometimes chambered center block in between the top and back. This design helps fight off that unwanted body-resonant feedback we spoke about before while even adding some extra sustain. Gibson offers a wide selection of semi-hollow body electric guitars, which include the iconic Gibson ES-335. Guitar brands such as Gretsch and Ibanez are also widely recognized for their semi-hollow body electric guitars.