Harpejji Model Comparison

Feature harpejji® u12   harpejji® g16  
harpejji® k24
Year Introduced 2015 2011 2010
Number of Octaves 3 octaves 4 octaves 5 octaves
Number of Strings 12 strings 16 strings 24 strings
Note Range C2 to C5 (= lowest 3 octaves of g16) C2 to C6
(Note: C2 is two whole tones below low E on a 6-string guitar)
A0 to A5
(Note: A0 is the lowest note on a piano)
Number of Frets 15 frets 19 frets 15 frets
Fret Type NEW! PepperoniTone® frets: Solid 3/16" rods for beefier tone, longer sustain, easier bends, and smoother slides Traditional guitar fretwire, wide Traditional guitar fretwire, wide
Fret Material Specially-Designed Metal Alloy
Maintains excellent electrical conductivity for extremely long periods of time with little or no cleaning
18% Nickel-Silver
Recommend cleaning frets once per week to ensure good electrical conductivity for electronic muting
18% Nickel-Silver
Recommend cleaning frets once per week to ensure good electrical conductivity for electronic muting
Note Marker Shapes All-circular design
Hollow C markers
Saturn-style G markers
Classic rhombus shapes
Hollow C markers
Classic rhombus shapes
Hollow C markers
Marker Board Removable and Replaceable Permanent Permanent
Audio Outputs 1 1 2 (8 bass strings, 16 treble strings)
Audio Output Jack (1) Female 1/4" Mono Jack (1) Female 1/4" Mono Jack (1) Female 1/4" TRS Jack
Tip = Treble Strings
Ring = Bass Strings
Sleeve = Ground
Control Knobs Left Knob: Master Volume
Right Knob: Master Tone 
Left Knob: Master Volume
Right Knob: Master Tone
Left Knob: Master Volume,
Right Knob: Tone for Treble Strings
Electronic String Muting YES
Proprietary StrumClean®, independent electronic string muting on each string
YES
Proprietary StrumClean®, independent electronic string muting on each string
YES
Proprietary StrumClean®, independent electronic string muting on each string
String Termination Quick-screw clamps, no winding necessary, no slipping/detuning Quick-screw clamps, no winding necessary, no slipping/detuning Quick-screw clamps, no winding necessary, no slipping/detuning
String Tuners Easy front access with small hex-drive screwheads to prevent accidentally bumping out-of-tune Easy front access with small hex-drive screwheads to prevent accidentally bumping out-of-tune Easy front access with small hex-drive screwheads to prevent accidentally bumping out-of-tune
Action Fully adjustable at both ends of string Fully adjustable at both ends of string Fully adjustable at both ends of string
Intonation Fully adjustable intonation screws with anti-vibration dampers for safe transport Fully adjustable intonation screws with anti-vibration dampers for safe transport Fully adjustable intonation screws with anti-vibration dampers for safe transport
Overall Body Dimensions (inches) 28.960" x 8.440" x 2" 32.171" x 10.250" x 2" 38.520" x 13.500" x 2"
Instrument Weight

10.5 lbs (birch)
10.6 lbs (maple)
11.0 lbs (bamboo)

11.5 lbs (birch)
12.8 lbs (maple)
13.1 lbs (bamboo)

19.5 lbs (birch)
22.0 lbs (maple)
24.3 lbs (bamboo)