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Kubicki Key Factor 5

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Page last updated Mar 30, 2026

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Discover the Kubicki Key Factor 5, a unique electric bass that combines exceptional playability with innovative design. Created by the renowned luthier Philip Kubicki, this bass guitar is a testament to craftsmanship and innovation in the world of musical instruments. It features a unique headless design that not only provides a sleek aesthetic but also offers precise tuning and balance. The Key Factor 5 is built with a multi-laminate neck-through-body construction, ensuring superior sustain and resonance.

Its electronics are equally impressive, boasting an active/passive switch that allows you to easily toggle between punchy, modern tones and classic, vintage sounds. The 18V preamp offers extended headroom, giving players a dynamic range and clarity seldom found in other basses. Additionally, the bass comes equipped with Kubicki's proprietary bridge and tuning system, which enhances tuning stability and improves intonation across the fretboard. Whether you're laying down a groove in a studio session or performing live on stage, the Kubicki Key Factor 5 delivers unparalleled versatility and performance.

Key Features:

Headless design for improved balance and tuning
Multi-laminate neck-through-body construction
Active/passive electronics with an 18V preamp
Proprietary bridge and tuning system for enhanced stability
Versatile tonal capabilities suitable for various music styles

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Keng Bassist

Factor Phillip Kubicki 5 by Keng-Bassist

Keng Bassist

REGGAETON NO AZULÃO - Deivid Kavalari - key factor 5 Philip Kubicki 1996

Deivid Kavalari

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Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Kubicki Key Factor 5.

Features and functionality

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The Kubicki Factor bass features an 18V electronics system, offering a unique sound distinct from other bass models.
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The bass includes a drop D trigger, appealing to those seeking versatile tuning options.
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The Kubicki's D extender shifts the middle of the string length from the 12th to the 10th fret when detuning, offering a unique tuning experience.
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The E string on the Kubicki stays in tune better than other drop D mechanisms due to the unique body-mounted tuners.
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There are two preamp types: a 9V with a four-way switch and an 18V with a six-way switch, offering varied sound options.
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Setup and maintenance

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The tuning system requires frequent maintenance, with parts known to wear out relatively quickly.
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Owners appreciate the ratchet action on the bridge, which allows for quick string changes in about five minutes and excellent tuning stability.
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Comparisons

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The Fender Jazz Plus from 1990-1994 shares the same 18V Kubicki preamp, often available on Reverb for around $1,000.
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Use cases and applications

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Known for its mid-length design, the Kubicki Factor is favored by players inspired by Stu Hamm's early sound.
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Value and pricing

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Recent sales indicate a significant price increase, with current prices ranging from $3,000 to $4,300.
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The bass is considered a "grail" instrument by enthusiasts, with the quality and rarity justifying its high price tag.
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User experience

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Owners who are familiar with Hipshot D-tuners may need adjustment when switching to the Kubicki's distinctive tuning system.
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Owners report a clean, hi-fi sound with a brutal punch, making it ideal for slap bass and styles requiring clarity and precision.
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Build quality

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The tuning and bridge system on the Kubicki is highly regarded for its engineering, reminiscent of classical bass extenders.
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The cross-cut laminated neck is praised for its solidity, with no dead spots reported by long-term owners.
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