True Blue 520
A single-channel microphone preamp and instrument DI in the API 500 series module format, built on an updated TRUE Systems preamp core. It suits studio, live and post-production users who want a clean preamp for condenser, dynamic, ribbon and self-powered tube microphones.
- API 500 series module format
- Up to 76 dB gain with +16 dB high-gain mode
- Variable HPF, 25–420 Hz, 6 dB/octave
- Instrument DI input with THRU jack
- Illuminated touch controls with blink-delay warning
- 4-level signal metering; 2-year warranty
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The CL-520 is a 500-series mic preamp and instrument DI based on an updated TRUE Systems preamp core, developed with TRUE Systems founder Tim Spencer. It provides up to 76 dB of gain in two ranges, with a detented gain control for repeatable settings. A +16 dB high-gain mode adds extra gain on demand, and a 180° phase invert is included.
Control is through an illuminated touch interface that drives microprocessor-controlled telecom relays instead of conventional switches, keeping signal paths short. A blink-delay warning precedes phantom power and high-gain engagement to avoid accidental switching. A 48V selector chooses between phantom power and a Dynamic/Ribbon mode, which raises input impedance to 10 kΩ and takes the input capacitors out of the signal path. A continuously variable high-pass filter covers 25 Hz to 420 Hz, and four-level metering shows signal level.
The module fits standard API 500-series racks and power supplies. A DI input with a FET-based THRU jack lets an instrument signal feed the preamp and pass on to an amp, another DI or a further module. The circuit is fully balanced with rail-to-rail design and 0.1% precision resistors. It is also offered as a matched stereo pair.
Video
Specifikacije
- Znamka
- Cloud Microphones
- Model
- True Blue 520
- Kategorija
- Studio › Predojačevalniki in outboard
Inputs
- Mic gain (high gain off)
- +7 to +60 dB
- Mic gain (high gain on)
- +23 to +76 dB
- Mic input impedance (48V on)
- 5.5 kΩ
- Mic input impedance (48V off, DYN/RIB)
- 10 kΩ
- Max mic input level (60 dB range)
- +20 dBu
- Max mic input level (76 dB range)
- +4 dBu
- DI gain (high gain off)
- -9 to +43 dB
- DI gain (high gain on)
- +7.5 to +60 dB
- DI input impedance
- 1 MΩ
- Max DI input level
- +6 dBu (THD+N = 0.0007%)
Outputs
- Maximum output level
- +28 dBu (THD+N = 0.0004%)
- THRU output
- Direct connection from DI input to instrument amp, external DI, or additional recording channel
Audio
- Frequency response (-3 dB)
- 6 Hz to 630 kHz
- Flatness
- ±0.25 dB (10 Hz to 250 kHz)
- High-pass filter
- 25 Hz to 420 Hz, 6 dB/octave
- HPF off response
- 6 Hz
- THD+N
- 0.00036% @ 1 kHz, 20 Hz to 20 kHz
- Noise (unweighted)
- -133 dB, 20 to 20 kHz, Rs=0
- Noise (A-weighted)
- -135 dB, Rs=0
- CMRR
- 92 dB (30 Hz to 20 kHz)
- Slew rate
- 54 V/µS
Controls
- Metering
- 4-level: -20 dBu, +4 dBu, +14 dBu, +24 dBu (OL)
- Switching
- Phantom 48V / DYN-RIB, +16 dB high gain, phase invert, HPF in/out
Power
- Consumption (10 kΩ load)
- +16 VDC @ 80 mA, -16 VDC @ 55 mA
- Consumption (1 kΩ load)
- +16 V @ 90 mA, -16 V @ 65 mA
Physical
- Format
- API 500 series module
- Channels
- Single channel (stereo pair available as two units)
- Made in
- USA
- Warranty
- 2 years