Amplifier for 500 series headphones

The Auditor is a professional 500-series headphone amplifier designed by Gainlab Audio . Built for demanding studio environments, it offers a rare combination of power, transparency, and reliability, all within a standard 500 chassis. It is ideal for sound engineers, mixing studios, and mastering studios seeking a dependable and uncompromising headphone monitoring solution.

Audio quality and design

The Auditor is based on a Class A architecture, guaranteeing natural, precise, and stable sound reproduction, even at high volumes. Extremely low distortion and a very linear frequency response allow for uncolored critical listening, ideal for mixing, mastering, or recording monitoring. The high power reserve ensures optimal driving of both high-impedance and more sensitive headphones.

Power and control

With over 1 watt per channel, the Auditor has ample headroom to drive even the most demanding headphones without compression or harshness. The volume control is smooth and precise, allowing for fine adjustments ideal for extended use. The very low output impedance ensures excellent transducer control and a consistent response regardless of the headphones used.

Safety and reliability

The Auditor incorporates several essential protection systems for professional environments. It protects headphones against power-on transients, DC currents, and overcurrents. Visual indicators allow monitoring of signal and power status. A mute function is integrated to secure connections and headphone changes.

Monitoring functions

The amplifier features a mono mode for checking phase compatibility and mix centering. The audio signal can be transmitted in parallel, facilitating integration into an existing monitoring chain or a larger 500-series modular system. These features make it a versatile tool for both fixed studio and mobile setups.

500-series integration

Designed to occupy two 500-series slots, the Auditor is compatible with standard rack chassis. Its compact form factor allows for centralized headphone monitoring directly in the rack, eliminating the need for an additional external device. It integrates seamlessly into a professional workflow based on 500-series modules.

Technical specifications

• Output power greater than 1 W per channel
• Frequency response 10 Hz – 20 kHz ±0.005 dB
• THD less than 0.005% at 200 mW
• Output impedance less than 1.1 ohms
• 500-series format, 2-slot width

Recommended use

The Auditor is intended for sound engineers, mixing and mastering studios, producers and technicians looking for an extremely transparent, powerful and secure headphone amplifier, perfectly suited for reference listening.