✨ Get 20% OFF your first order. ✨

Your Shopping Bag

Your bag is empty

Subtotal $0.00
Shipping Calculated at checkout
Continue Shopping

Overstock Deal Graphtech Ratio Bass Guitar4-in-line Key Machine Heads ~ Chrome Holiday Edition [NeZrdwqz]

$25.99 $83.99 -69%

GraphTech RATIO Bass Guitar Machine Heads Experience the ultimate in bass guitar tuning with the GraphTech RATIO Bass Guitar4-in-Line Key Machine Heads. Designed for right-handed players, these precision-engineered machine heads offer a 4-in-line con

Secure Shopping

100% Safe Guarantee

Free Shipping

On orders over $30

Money-Back

30-Day Guarantee

GraphTech RATIO Bass Guitar Machine Heads

Experience the ultimate in bass guitar tuning with the GraphTech RATIO Bass Guitar4-in-Line Key Machine Heads. Designed for right-handed players, these precision-engineered machine heads offer a 4-in-line configuration that is both sleek and functional. With their chrome finish, they add a touch of elegance to any bass guitar setup.

Unique Gear Technology for Superior Tuning

The PRB-4400 machine heads are a testament to innovation, featuring RATIO®'s patented gear technology. This groundbreaking design incorporates a double envelope gear with a hardened steel gear, resulting in an incredibly smooth and durable tuning experience. The gear ratio is unique for each string position, providing a one-turn-one-tone tuning precision that is unparalleled in the industry. Key features include:

  • Calibrated Machine Heads: RATIO® Calibrated Machine Heads incorporate different string gauges into the tuning equation for balanced gear ratios.
  • Patented Gear Technology: RATIO®'s gear technology offers a 36:1, 30:1, 20:1, or 18:1 gear ratio from Low E to G, ensuring precise and predictable tuning.

Comprehensive Specifications and Accessories

The GraphTech RATIO Bass Guitar4-in-Line Key Machine Heads are designed with the bass player in mind. They come with the following specifications:

  • Peg Hole Diameter: 35/64" (14mm)
  • String Post Diameter: 0.547" (13.9mm)
  • String Post Length: 1.030” (26.1mm)
  • Weight per Machine Head: 1.86oz (53g)
  • Weight per Set of Four: 7.44oz (212g)
  • String Diameter: Up to 0.98 gauge (or larger if taper-wound)
Each set includes four machine heads, mounting screws, and bushings, making it easy to install and enjoy the benefits of RATIO®'s cutting-edge technology. With RATIO®, a half-turn is a semi-tone, ensuring consistent and precise tuning on every string. Upgrade your bass guitar today and experience the difference with GraphTech RATIO Bass Guitar4-in-Line Key Machine Heads.

What Our Customers Say

January 2, 2026

Absolutely no complaints!

This is a very, very, very, very, very useful item.

- Mabon T..

January 2, 2026

Absolutely no complaints!

This is a very neat and a very, very clever device.

- Caradoc A..

January 2, 2026

Absolutely no complaints!

Great item, and it was delivered very, very, very fast.

- Afallach T..

Write a Review

You Might Also Like

Discover more great products from our collection.

Ex Libris

Ex Libris

(999)
$100.99 $323.99 -69%
GP Race V2 Kostym

GP Race V2 Kostym

(510)
$58.99 $188.99 -69%
Nuummite Skull

Nuummite Skull

(503)
$56.99 $182.99 -69%
Ambience - Aalborg base

Ambience - Aalborg base

(974)
$20.99 $67.99 -69%
Catalina Necklace

Catalina Necklace

(70)
$22.99 $73.99 -69%

Copyright 2026 © mappa-mercia.org

VISA
PayPal
Stripe
Mastercard
CASH ON DELIVERY