Gotoh GB707 5 String Bass Tuning Keys — 3+2 Sealed, 20:1, Pure Black (GB707-503)

The Gotoh GB707 (GB707-503) is a five-string bass tuning key set in a 3+2 configuration — three tuners on the bass side (low B, E, A) and two on the treble side (D, G) — with sealed gear construction and pure black finish. Built in Japan to Gotoh's precision engineering standards, the GB707-503 shares the same sealed mechanism, 20:1 gear ratio, 14mm shaft hole requirement and included hardware as the GB707-320, with pure black finish in place of chrome. This is the correct choice for five-string bass players with a 3+2 headstock and black hardware specification — Schecter, Ibanez, ESP/LTD and many other contemporary five-string designs that use black hardware throughout. Before ordering, confirm your headstock uses a 3+2 layout and that existing tuner holes measure 14mm, then verify all base plate dimensions against the technical diagram provided.

GB707-503 vs GB707-320 — Same Tuner, Different Finish

Pure Black Finish — Hardware Matching on Contemporary Bass Designs

Black hardware has become one of the most common specifications on contemporary production bass guitars — particularly across the metal, progressive rock and hard rock markets where instruments are built to a dark, uniform aesthetic from the factory.

Brands that regularly ship five-string basses with full black hardware specification include:

• Schecter — many Stiletto, Hellraiser and custom five-string models ship with black bridges, tuners and hardware throughout
• Ibanez — SR5 and BTB five-string models in darker finishes frequently use black hardware as standard
• ESP/LTD — five-string models in the B and F series commonly feature full black hardware
• Many boutique and contemporary builds — where the instrument builder has specified black hardware throughout for aesthetic consistency

On instruments built with black hardware throughout, replacing worn or failed tuners with chrome alternatives creates an immediate visual inconsistency — chrome tuners on a black-hardware instrument draw attention to the mismatch rather than the instrument. The GB707-503 in pure black maintains the hardware continuity the instrument was designed with, providing a clean, consistent appearance across the headstock and the rest of the instrument's hardware.

5-String 3+2 Configuration — Confirming Your Headstock Layout

The GB707-503 is a 3+2 five-string set — three tuner positions on the bass side of the headstock (low B, E, A strings) and two on the treble side (D, G strings). This is the most widely used five-string bass headstock configuration and suits the majority of contemporary five-string production instruments.

Before ordering, count the tuner positions on each side of your headstock:

• 3 bass side, 2 treble side — GB707-503 is the correct configuration ✓
• 4 on one side, 1 on the other (4+1) — different model required, contact us
• All 5 on one side — different model required, contact us

Configuration cannot be adjusted after purchase — confirm your headstock layout before ordering.

Sealed Gear Construction — Low Maintenance, Consistent Performance

The GB707-503's fully sealed gear mechanism encloses the worm gear within the tuner housing — providing environmental protection from dust and moisture, factory lubrication that requires no user maintenance, and consistent operational feel across years of regular use. These are the same sealed construction advantages as the GB707-320, GB707-410 and GB707-210 — the finish is different, the mechanism is identical.

For players who gig regularly and transport their instrument in varied environments, sealed construction's protection from external contamination provides a practical advantage over open-gear formats across the instrument's life.

20:1 Gear Ratio — Five-String Precision and Low B Stability

The 20:1 ratio provides finer tuning increments and better stability under string tension than the 14:1 and 16:1 ratios common on stock and budget replacement tuners. On a five-string bass, this matters particularly on the low B string — the highest-tension string on the instrument — where a higher gear ratio provides greater mechanical resistance to string tension pulling the tuner out of position during playing.

Players who experience low B pitch drift during a set on their current stock tuners will find the GB707-503's 20:1 sealed mechanism a meaningful practical upgrade.

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:

• Configuration: Confirm 3+2 headstock layout — three tuners bass side, two treble side
• Shaft hole diameter: Must measure 14mm (9/16"). Holes smaller than 14mm require reaming by a guitar technician
• Base plate dimensions and screw spacing: Check technical diagram against your headstock's existing screw positions
• Hardware finish: Confirm existing hardware is black — if chrome, consider the GB707-320; if nickel, contact us for advice

Professional installation is available through our guitar technician at Angkor Music.

Who Is the Gotoh GB707-503 For?

• Five-string bass players with black hardware instruments upgrading from stock or budget tuners on a 3+2 headstock
• Schecter, Ibanez, ESP/LTD and similar five-string bass owners with black hardware who need a replacement set that maintains hardware finish continuity
• Players replacing worn, damaged or cosmetically degraded tuners on a black-hardware five-string bass
• Luthiers and repair technicians fitting black sealed hardware to five-string customer instruments with 3+2 headstocks
• Bass builders specifying black hardware throughout a five-string build with 14mm shaft holes and a 3+2 headstock layout
• Players who have confirmed their headstock is 3+2, existing holes are 14mm, and existing hardware is black before ordering

Specifications

Expert Advice and Installation at Angkor Music

At Angkor Music Melbourne we stock the Gotoh GB707 range across pure black, chrome and other finishes, in five-string and four-string configurations. If you are unsure whether the GB707-503 suits your instrument's hardware specification, contact us with your bass's make, model and hardware finish before ordering. Professional installation is available through our guitar technician.

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Frequently Asked Questions

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