Cloud Microphone True Blue 520 Precision Mic Preamp

Cloud Microphones TRUE BLUE 520 – Precision Mic Preamp / Instrument DI

The TRUE BLUE 520 is a single-channel, API 500 Series microphone preamp and instrument DI built around an updated TRUE Systems preamp core. Offering up to +76 dB of gain, a continuously variable high-pass filter, and illuminated Cloud Touch Controls, it delivers detailed, low-distortion amplification for condenser, dynamic, ribbon, and self-powered tube microphones.

Key Features

• Single-channel API 500 Series preamp module

• Up to +76 dB of microphone gain with +16 dB High-Gain mode

• Updated TRUE Systems preamp core, developed with True Systems founder Tim Spencer

• Cloud Touch-Control interface with illuminated controls and status indicators

• Blink-Delay warning helps prevent accidental phantom power or High-Gain activation

• Continuously variable high-pass filter from 25 Hz to 420 Hz, with 6 dB/octave slope

• Dynamic/Ribbon mode provides 10 kΩ input impedance and removes input capacitors from the signal path

• 48V phantom power for condenser microphones

• Polarity inversion

• Four-level signal metering: -20 dBu, +4 dBu, +14 dBu, and +24 dBu overload

• Instrument DI input and THRU output for routing to an amplifier or additional gear

• Fully balanced topology and rail-to-rail circuit design

• Compatible with standard API 500 Series racks and power supplies

• Made in the USA

Technical Specifications

• Format: API 500 Series module

• Channels: 1

• Mic gain: +6.5 to +60 dB; +22 to +76 dB with High-Gain mode

• Mic input impedance: 5.5 kΩ with phantom power; 10 kΩ in Dynamic/Ribbon mode

• DI input impedance: 1 MΩ

• DI gain: -9 to +43 dB; +7.5 to +60 dB with High-Gain mode

• Maximum mic input level: +21 dBu in 60 dB range; +3 dBu in 76 dB range

• High-pass filter: 25–420 Hz, 6 dB/octave; 6 Hz response with filter off

• Frequency response: 6 Hz–630 kHz (-3 dB bandwidth, at 40 dB gain)

• Maximum output level: +28 dBu at 40 dB gain

• THD+N: Less than 0.00036% at 1 kHz, 20 Hz–20 kHz

• Noise: -133 dB unweighted; -135 dB A-weighted

• Warranty: 2 years