Guitars
Most guitars, including jazz guitars, are factory made. The most renowned names are: Gibson, Guild, Gretsch and Ibanez. Many guitarists prefer to play guitars hand-built by luthiers. These can either be standard types, with or without custom options, or completely custom built guitars. The standard is the 6-string, but the last 25 years or so, more and more jazz players prefer the play a 7-string guitar with the so-called “Van Eps”-tuning, with an added low A 7th string.
Amps
The same goes for guitar amps. The majority of jazz players still use e.g. a Fender combo amp, but at the same time the marked is flooded by “boutique” style amps. Small and easy to carry amps, like: Gallien-Krueger, Acoustic Image, GLB Sound, Mambo Amp, Henriksen "The Bud" and so far the two lightest, the Quilter 8 and the "DV Little Jazz" make getting to and from the gig so much easier these days!