Spira Guitars S420CHM Chameleon
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Manufacturer Information
Spira Guitars
https://spiraguitars.com
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Wood4music
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A Sharpened Evolution of the S Series: from the S-400 to the S-420
The Spira S-420 is a direct evolution of the S-400, with an even more "performance" oriented approach. The addition of a locking tremolo and locking tuners clearly targets guitarists who demand precision, sharp attacks, and reliable tuning, whether for live, studio, or long rehearsal sessions.
For Which Guitarist and Styles?
The S-420 is aimed at intermediate to advanced guitarists looking for a double cutaway electric with a fast feel. It excels in modern metal, heavy rock, hard rock, shred, and all contexts where tight riffs, palm mutes, and solos high up the neck are chained together. Its ergonomics and 24 frets also make it an excellent base for working on speed and precision.
The Sound
The combination of a torrefied poplar body and a torrefied Canadian maple neck promotes a fast response, with a well-defined attack and very clean sustain. The Ebony Tech fingerboard, combined with 24 jumbo frets and a 14" / 356 mm radius, enhances the sensation of speed and note clarity, particularly useful for alternate picking and bends. On the amplification side, the HH configuration and Spira Villain humbuckers (12k output, ceramic magnets) produce an aggressive and dense tone while maintaining good note separation when the gain is high. The 1 volume / 1 tone control setup goes straight to the essentials to stay effective on stage.
Technical specifications
| Electronics: microphone configuration | HH | Body | Poplar |
| Category | Double cut | Bridge / tailpiece | Tremolo |
| Left handed | No | Electronics | Passive |
| Strings | Steel | Color | Blue |
| Nbr of strings | 6 | Finishing | Glossy |
| Fingerboard | Ebony | Hardware | Black |
| Nbrs of frets | 24 | ||
| Type | double cutaway electric guitar | Nut | bone |
| Finish | glossy | Truss rod | double action |
| Neck | torrefied Canadian maple | Bridge | Sung-il locking tremolo (made in Korea) |
| Profile | modern D | Tuners | black locking |
| Neck finish | satin | Hardware finish | black |
| Radius | 14" / 356 mm | Pickups | HH, Spira Villain, custom-made, 12k output, ceramic magnets |
| Scale length | 25.5" / 648 mm | Controls | 1 volume, 1 tone |
| Number of frets | 24 jumbo | Orientation | rock and metal, high performance |
| Nut width | 43 mm / 1.69" | ||
Questions frequently asked
Is the Spira Guitars S420CHM Chameleon suitable for modern metal?
This model is suitable for modern metal and heavy rock thanks to its two Spira Villain ceramic magnet humbuckers, which have a rated output of 12k. The HH configuration provides a dense tone and good note separation at high gain.
Does the S-420 tremolo hold tuning well?
The bridge is a Sung-il locking tremolo made in Korea, paired with black locking tuners. This setup aims to enhance tuning stability when using the vibrato.
How comfortable is the neck for fast solos?
A roasted Canadian maple neck with a modern D-shaped profile is paired with a satin finish. The 14-inch / 356 mm radius and 24 jumbo frets facilitate playing high on the neck and bending notes.
What woods and materials make up this guitar?
The body is made of roasted poplar and the neck of roasted Canadian maple. The fingerboard is listed as ebony in the specifications, with a bone nut.
What is the scale length and nut width?
The scale length measures 25.5 inches, or 648 mm, and the nut width is 43 mm / 1.69 inches.



