User guide

PreComp™ Preamp and VCA Compressor

True to the Music

Radial Engineering Ltd.

FEATURE SET

1. GAIN: Used to set the gain of the mic preamp.

Accustate gain control sets the input sensitivity

and gain at the same time to optimize signal to

noise at all settings.

2. 180° REVERSE: Inverts the polarity to help phase

align two microphones when recording in stereo.

3. HIGH-PASS FILTER: Gently rolls-off low

frequencies below 100Hz to reduce rumble which

can muddy up a recording.

4. LED METERING: The green and yellow LEDs

let you know when the signal is below or above

the threshold and compression is being applied.

The red LED illuminates when the signal is near

clipping.

5. THRESH: Variable threshold control is used to set

the point when compression will take effect.

6. RATIO: Sets the compression ratio from 1:1 (off)

to 10:1 where a 10dB input produces 1dB at the

output.

7. GAIN: Sets the output level of the compressor and

used to compensate for the gain reduction.

8. SLOW-FAST: Sets the speed at which the

compressor will take effect. Set to slow, the initial

transient such as a snap from a snare will pass

without compression.

9. IN: Turns the compressor on or off to compare the

dry signal with the compressed results.

10. 48V SWITCH: Activates phantom power for

condenser mics and active direct boxes. Recessed

to prevent accidental turn-on.

11. PHANTOM LED: Indicator illuminates when +48V

phantom power is active

12. OMNIPORT™: Functions as a signal access point

allowing the preamp and compressor sections

to be used independently or to insert another

processor like an EQ in between the two sections.

13. OMNIPORT™ SWITCH: Turns the Omniport on

and off. When off, the preamp and compressor

sections work in series. When on, the Omniport

TRS insert jack is switched into the signal path

between the two sections.