Bass Harpejjis
• Semi-Fretless – Glass fingerboard section with fret & note indicators for accurate pitch
• Note Range: B0 – F♯4 (3.5 Octaves)
Fretted Section: B0 – F♯3
Fretless Section F1- F♯4
• M Series Design Includes the Major Upgrades of the M Series
• Light Gauge Flatwound Strings – Made possible by the extra long scale length
• Semi-Fretless – Glass fingerboard section with fret & note indicators for accurate pitch
• Note Range: B0 – F♯4 (3.5 Octaves)
Fretted Section: B0 – F♯3
Fretless Section F1 – F♯4
• Includes the Major upgrades of the M Series
• Light gauge flatwound strings – Made possible by the extra long scale length
Bass Harpejjis
• Semi-Fretless – Glass fingerboard section with fret & note indicators for accurate pitch
• Note Range: B0 – F♯4 (3.5 Octaves)
Fretted Section: B0 – F♯3
Fretless Section F1- F♯4
• M Series Design Includes the Major Upgrades of the M Series
• Light Gauge Flatwound Strings – Made possible by the extra long scale length
• All-new design with upgraded features
• Note Range: C1 - C6 (Middle C is C4)
• Dual-channel output for separate bass and treble effects
• Deep, powerful bass response
Built to Order:
Natural Finishes Built in 30-75 days
Custom Finishes Built in 45-90 days
If you have questions about placing an order, custom paint options, or any harpejji related question feel free to call us at 1.800.472.2105 or send an email to support@marcodi.com.
Glass Fingerboard
Say hello to the smoothest part of your harpejji—our all-glass fretless zone. Built for glides, bends, and buttery vibrato, this sleek glass surface turns every note into a silky, expressive experience. It’s durable, slick, and looks like it was pulled straight from a sci-fi concert stage. Whether you’re adding subtle textures or diving into full-on fretless solos, this is where feel meets futuristic flair.
M Series Pickup Design
The standard piezo pickups have been completely redesigned to optimize consistent tone across the instrument. The piezo crystals have been reoriented 90 degrees to reduce inharmonic overtones.
Pepperoni Frets + Flat Wounds
Not only do Pepperoni Frets look and sound better, they feel buttery smooth under your fingertips. Pepperoni Frets are made with a proprietary alloy for maximum durability and hardness.