Ibanez Wiki
STW Black Pearl [1] (more images) Red copyright sprite.png

The STW is a double neck S series solid body electric guitar model introduced by Ibanez in 1999. It is also referred to as the S540TW or the 540S-TW. It was made in Japan by FujiGen and was a spot model which never appeared in a catalog.

The STW is modeled on the S540 with a sleek, thin-edged double cutaway (triple cutaway?) body. Its lower neck has six stings while the upper neck is a seven string.

The STW features a mahogany body with two necks both of which are one-piece maple with bubinga reinforcement and are attached with a traditional bolt-on neck joint with a stamped metal plate. The serial number appears on the back of the 6-string headstock and each plate is stamped with a non-matching production number. The lower, six-string neck has a reverse headstock. Both necks have 22-fret rosewood fingerboards with abalone oval position markers.

Both necks have Ibanez pickups. The seven string neck has dual V77 and V87 humbuckers, while the six string has Quantum pickups and adds a middle single-coil. The six string neck has a Lo-Pro Edge double locking tremolo bridge with a locking nut while the 7-string has a fixed bridge.

Controls consist of individual volume controls for each neck, a single master tone control, a 5-way pickup selector for the six string neck, a mini 3-way toggle pickup selector for the 7-string neck and a 3-way neck selector toggle (6-string/both/7-string).

The 540STN is a similar model with 6-string and 12-string necks that was offered in the early 1990s. These two S series twin necks are among just a handful of such models sold by Ibanez since the 1980s. Since the S540TW was discontinued after 1999, the only production twin-neck models have been 2670RE Artwood Twin reissue from 2006 and the Xiphos XPT1400TW in 2010.

It's believed that as few as a dozen examples of the STW were produced.


Related content: Prestige series | S series | Models-icon.png
Specifications for STW
Model name: STW / S540TW / 540S-TW
Year(s) offered: 1999
Sold in: Japan
Made in: Japan
Finish(es): Black (BK) / Black Pearl (BP)
Body type:
Solid body
Body material:
Neck joint:
Bolt-on w/ metal plate (both necks)
6 string: Lo-Pro Edge tremolo
7 string: Fixed bridge
Hardware color:
Neck type:
6 string: Wizard
7 string: Wizard-7
Neck material:
1-piece maple w/ bubinga stripe (both necks)
Scale length:
648mm/ 25½" (both necks)
Fingerboard material:
Fingerboard inlays:
Abalone oval
22 / jumbo
Machine heads:
Gotoh SG381
Electronics/ Strings
Pickup configuration:
6 string: HSH
7 string: HH
Bridge pickup:
6 string: Ibanez QM2 (H)
7 string: Ibanez V87 (H)
Middle pickup:
6 string: Ibanez QMS1 (S)
7 string: none
Neck pickup:
6 string: Ibanez QM1 (H)
7 string: Ibanez V77 (H)
6 string: Master volume / 5-way lever pickup selector
7 string: 1 volume / 3-way mini toggle pickup selector
Both: Master tone / 3-way toggle neck selector
Output jack:
¼" stereo barrel
String gauge (factory):
.009/.011/.016/.024/.032/.042 (6 string)
.009/.011/.016/.024/.032/.042/.054 (7 string)
Factory tuning:
1E,2B,3G,4D,5A,6E (E Std.) (6 string)
1E,2B,3G,4D,5A,6E,7B (7 string)


1999 Ibanez S540TW Limited edition ( aka: STW / 540S-TW ) Red copyright sprite.png
Additional images
S540TW front.jpg
Front of body
S540TW back.jpg
Rear of body
S540TW headstock.jpg
S540TW tuners.jpg
Gotoh SG381 tuners
S540TW plate .jpg
Bolt-on w/ metal plate
STW 2.jpg
7 string fixed bridge & 6 string Lo-Pro Edge tremolo bridge [1]


1999 Ibanez STW ( 6 & 7 strings Doubleneck Limited Edition Guitar )
1999 Ibanez STW Double neck 6 & 7 strings ( video up close )


  1. 1.0 1.1 Image courtesy Jesse Nicholson; used by permission
  • S540TW, Ibanez Register, archived October 2008