Gotoh GB707 Bass Tuning Keys — 2 a Side, Sealed, 20:1, Chrome (GB707-210)

The Gotoh GB707 (GB707-210) is a four-string bass tuning key set in a 2-a-side configuration — two tuners on each side of the headstock — with sealed gear construction. Built in Japan to Gotoh's precision engineering standards, the GB707-210 features a 20:1 gear ratio, 14mm shaft hole requirement, and chrome finish. Each tuner includes a mounting screw, bushing and washer. This is the modern sealed chrome alternative to the open-gear nickel GB2-201 for players with a 2+2 symmetrical headstock — providing the same Gibson EB-style and contemporary 2-a-side configuration as the Gotoh GB2, but with a fully enclosed sealed mechanism and chrome finish rather than the GB2's vintage open-gear nickel format. Before ordering, confirm your headstock uses a 2+2 symmetrical layout and that existing tuner holes measure 14mm, then verify all base plate dimensions against the technical diagram provided.

GB707-210 vs GB2-201 — Choosing Your 2-a-Side Gotoh Set

2-a-Side Configuration — Which Basses This Fits

The 2-a-side configuration places two tuners on each side of the headstock, producing a symmetrical 2+2 layout. The GB707-210 suits:

• Gibson EB series basses — EB-0, EB-3 and related models with the classic symmetrical Gibson headstock
• Epiphone bass instruments — which follow the Gibson headstock format
• Hofner violin basses and similar short-scale instruments with symmetrical headstock layouts
• Contemporary production basses with 2+2 headstocks and chrome hardware — where the sealed modern aesthetic of the GB707-210 suits the instrument better than the vintage open-gear GB2
• Custom and boutique builds with a symmetrical 2+2 headstock, 14mm shaft holes and chrome hardware specification

The GB707-210 is not a 4-in-line product. If your bass has all four tuners on one side, the GB707-410 (sealed chrome) or FB30 (open gear nickel) are the correct 4-in-line alternatives. Configuration is the first thing to confirm before selecting any replacement tuner set.

Sealed Construction — Modern Performance for Contemporary Basses

The GB707-210's fully sealed gear mechanism provides the same practical advantages as the GB707-410 and GB707-320 — environmental protection, factory lubrication with no user maintenance required, and a clean contemporary appearance on the headstock.

For players on modern production basses with chrome hardware, sealed construction is generally the more appropriate choice over open-gear formats. Open-gear vintage tuners suit vintage and vintage-inspired instruments authentically — on a contemporary bass with modern hardware, the open-gear aesthetic can look out of place. The GB707-210's sealed housing presents a uniform, modern profile that suits contemporary bass design without referencing the vintage aesthetic of the GB2.

The sealed mechanism also maintains consistent operational feel over time without user intervention — factory lubrication remains within the sealed housing throughout the life of the tuner, providing smooth, consistent gear feel across years of regular use.

20:1 Gear Ratio — Performance and the GB2 Comparison

The GB707-210's 20:1 gear ratio is a significant upgrade over the 14:1 and 16:1 ratios common on stock and budget replacement tuners, providing finer tuning increments and better stability under string tension.

One important distinction from the GB2-201: the GB2's 26:1 ratio is higher than the GB707-210's 20:1. For players who specifically want the maximum available gear ratio in a 2-a-side Gotoh set — and who prefer the open-gear nickel aesthetic — the GB2-201 provides an additional step of precision beyond the GB707-210. For players who prioritise sealed construction and chrome finish over maximum ratio, the GB707-210's 20:1 performance is a meaningful and capable upgrade over stock tuners without the vintage open-gear format.

Chrome Finish — Hardware Matching on Contemporary Instruments

The chrome finish of the GB707-210 suits contemporary production basses with chrome bridges, strap buttons and control hardware. For instruments with existing nickel hardware — vintage and vintage-inspired basses in particular — the GB2-201 in nickel is the better finish match. Chrome and nickel are visually similar but distinguishably different, and maintaining a consistent hardware finish across an instrument is worth considering when selecting replacement tuners.

Installation — What Is Included and What to Check

Each tuner includes a mounting screw, bushing and washer — all hardware required for a standard installation on a compatible headstock.

Before ordering, verify the following against the technical diagram provided:

• Configuration: Confirm your bass has a symmetrical 2+2 headstock — two tuner positions on each side. If all four tuners are on one side, the GB707-410 or FB30 are the correct 4-in-line alternatives
• Shaft hole diameter: Existing tuner holes must measure 14mm. Holes smaller than 14mm require reaming by a guitar technician before installation
• Base plate screw spacing: Compare the technical diagram's dimensions against your headstock's existing screw positions before ordering
• Hardware finish: Confirm existing hardware is chrome — if nickel, the GB2-201 is the better finish match

Contact us before ordering if you are uncertain about configuration or fit. Professional installation is available through our guitar technician at Angkor Music.

Who Is the Gotoh GB707-210 For?

• Bass players upgrading from stock or budget tuners on a contemporary 2+2 headstock instrument with chrome hardware
• Players on Gibson EB-style, Epiphone, Hofner or similar 2-a-side basses who want sealed modern construction rather than the vintage open-gear format
• Players replacing worn or damaged tuners who prefer low-maintenance sealed performance over the open-gear GB2-201
• Luthiers and repair technicians fitting sealed chrome hardware to contemporary 2-a-side customer instruments
• Bass builders requiring a sealed, chrome, 20:1 ratio 2-a-side tuner set for a new build with 14mm shaft holes
• Players who have confirmed their headstock is 2+2, existing holes are 14mm, and the GB707-210's base plate dimensions are compatible before ordering

Specifications

Expert Advice and Installation at Angkor Music

At Angkor Music Melbourne we stock the complete Gotoh bass tuner range across sealed and open-gear formats, 2-a-side and 4-in-line configurations, and multiple finishes. If you are deciding between the GB707-210 and the GB2-201 for your 2-a-side headstock, contact us with your bass's make, model and existing hardware finish and we will confirm which is the correct product. Professional installation is available through our guitar technician.

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Frequently Asked Questions

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