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HeadAmp GS-X mk2 Balanced Headphone Amplifier / Pre-Amplifier

The GS-X Mk2 is HeadAmp's flagship amplifier for dynamic and planar magnetic headphones. Used by numerous high-end headphone manufacturers in their development labs, this headphone amplifier that gets the clearest sound possible from your cans.

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Our Take

The GS-X Mk2 delivers the quickest, cleanest, most transparent sound you will find in a headphone amplifier, and does so regardless of the headphones you pair with it. You'll simply hear the character of the headphones themselves, and the connected source, as the GS-X does its' part to supply all the power your headphones need, without coloring the sound.

Across the Board Performance

The GS-X is carefully designed to provide the same level of experience whether listening with high sensitivity, multi-driver in-ear monitors, low-impedance current-hungry planar magnetic headphones, or low-efficiency, high-impedance headphones. The combination of extra low-noise transistors, careful part matching, and an adaptable gain setting work together to give your entire collection of headphones just what they demand.

With a circuit that has evolved and matured over a 15-year period, the GS-X Mk2 is the most powerful, linear, and transparent amplifier that we have ever produced. Pushing up to 6W of class-A power into balanced headphones, the GS-X Mk2 can tame the toughest headphone loads on the market, while its low-noise circuitry delivers an equally brilliant performance with sensitive in-ear monitors.

Only the Highest Quality

The GS-X Mk2 is a carefully handcrafted piece of audio equipment, with painstakingly matched components, and the highest standards for build quality in the business. Every GS-X Mk2 is tested extensively throughout the build process, as well as before, and after an extensive burn-in process to ensure the best possible performance.

More Than a Headphone Amp

In addition, the GS-X Mk2 makes a fine preamp for your stereo speaker system. With its high input impedance, low output impedance, multiple I/O options, 3-way gain control, and precise volume control, the GS-X Mk2 can fit into almost any stereo rig, and provide the same wonderfully transparent sound output that it does with headphones.


• Balanced 4-pin XLR Output

• 2x SE 1/4" Headphone Outputs

• Low, Medium & Hight Gain Options

• Input Selector Switch

• 2 pair Single Ended RCA Input

• 1 pair Balanced 3-pin XLR Input

• 1x stereo pair RCA Active Pre-Amp Outputs

• 1x stereo pair XLR Active Pre-Amp Outputs

• 1x stereo pair RCA Loop Outputs

• 1x stereo pair XLR Loop Outputs

3 Year Warranty on all Parts and Labor

Technical Specs

Output Voltage
+/-20V Dual Mono

0.003% / 1KHz

Power Output (HP/Balanced):
8W/25-ohm, 6W/50-ohm, 3W/100-ohm

Operating Voltage

Power Consumption

Amp: 14.5x9x2.5”, 5lb
Power Supply: 14.5x9x2.5”, 7lb

About HeadAmp

HeadAmp builds some of the world's best headphone amplifiers like our famous Blue Hawaii SE or our new compact GS-X mini. All of our solid state amps start with new-old-stock Japanese sand which are irreplaceable for discrete solid state designs.