Korg
Korg PBXPRO Pitchblack X Pro Rackmount Guitar Tuner
★★★★★
The Korg Pitchblack X Pro delivers ultra-precise rackmount tuning with four display modes and a built-in signal buffer.
$174.99*
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*Price sourced from Amazon.com. Last updated:Jun 04, 2026.Price and availability are subject to change.
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Overview
Key Features
Rackmount tuner designed for professional studio or stage rack systems.
Provides a larger, multicolored LED display for excellent visibility.
Includes four meter display modes: regular, strobe, half-strobe, and focus
Built-in ULTRA BUFFER maintains guitar signal strength over long cable runs
Switch between Ultra Buffer mode and True Bypass mode for vintage pedal compatibility
Compact and durable design for reliable performance on stage and in the studio
Equipped with a built-in cable tester for easy troubleshooting
Runs on standard 9V power supply or batteries for flexible power options
Ideal for guitarists of all skill levels looking for precise and quick tuning
Affordable yet high-quality rackmount tuner for professional use
Specifications
Scale
12-note equal temperament
Detection Range
E0 (20.60 Hz) – C8 (4,186 Hz)
Calibration Range
A4 = 436–445 Hz (1 Hz steps)
Detection Accuracy
+/- 0.1 cent (Strobe mode)
Input Impedance
1 MΩ (tuner on)
Display Modes
Regular, Strobe, Half-Strobe, Focus
Power Supply
9V AC adapter or batteries
Format
Rackmount
Pros & Cons
👍 Pros
- Ultra-high tuning accuracy of +/- 0.1 cent in Strobe mode suits professional studio and stage demands
- Multicolored LED display provides excellent visibility under varying lighting conditions
- Built-in ULTRA BUFFER preserves signal integrity over long cable runs without a separate pedal
- Integrated cable tester eliminates the need for a standalone diagnostic tool
- Switchable between Ultra Buffer and True Bypass modes for compatibility with different signal chain setups
👎 Cons
- Rackmount form factor requires a rack unit, making it impractical for pedalboard-only setups
- Detection range starts at E0 (20.60 Hz), which may not cover extremely low alternate tunings on extended-range instruments
- Calibration range is limited to A4 = 436–445 Hz in 1 Hz steps, which may not suit all non-standard reference pitches
- Requires a separate 9V power supply since one is not included in the box
Frequently Asked Questions
What tuning accuracy does the Pitchblack X Pro achieve?
The Pitchblack X Pro offers +/- 0.1 cent accuracy in Strobe display mode, making it one of the most precise rackmount tuners available.
What is the ULTRA BUFFER and when should I use it?
The built-in ULTRA BUFFER preserves your guitar's tone and signal strength over long cable runs. You can switch between Ultra Buffer mode and True Bypass mode depending on whether you need signal conditioning or a pure unprocessed signal path.
What are the four meter display modes?
The Pitchblack X Pro includes Regular, Strobe, Half-Strobe, and Focus display modes, letting you choose the visual feedback style that works best for your tuning preference and stage environment.
Does the Pitchblack X Pro include a cable tester?
Yes, it has a built-in cable tester so you can quickly troubleshoot signal issues without needing a separate testing tool.
What power options are available?
The unit runs on a standard 9V AC adapter or batteries, giving you flexibility for both permanent rack installations and portable setups.
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