Categories›Guitars›Graph Tech PRB 4401 C0 Ratio Bass Machine Heads Open Back with classic trefoil button - 4-in-a-row - left - Chrome
Updated 10 May 2026
| Brand | Graph Tech |
| Category | Guitars |
| Available at | 1 UK stores |
| 90-day avg | £172.33 |
Graph Tech
Graph Tech PRB 4401 C0 Ratio Bass Machine Heads Open Back with classic trefoil button - 4-in-a-row - left - Chrome
£169.00£207.00↓ 18% offFair Price
Cheapest at Bax · 1 store
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PRICE HISTORY
Current
£159
Change
+7.9%
Avg
£150
Low
£137
High
£161
Volatility
3.1%
PRODUCT DESCRIPTION
- The Graph Tech PRB-4401-C0 Ratio Bass Machine Heads are high-quality tuning machines for 4-string bass guitars with left-handed 4-in-line configuration. Thanks to the unique Ratio technology, each string has its own gear ratio, making tuning faster, more consistent and accurate. A full rotation of the knob always results in a tone change of exactly one whole tone. The classic trefoil design provides a familiar look and comfortable grip. The open construction and chrome finish give these mechanisms a stylish and durable look, ideal as an upgrade or replacement.