6386 and ES-8 Operating Instructions


INPUT: The Input attenuator controls the signal level to the input transformer. Use it to prevent overload of the transformer and gain control tube. The optimum operating level is 0VU =+4dBu.

THRESHOLD: The Threshold control determines the amount of gain reduction applied to the source material. Up to 12dB of gain reduction is possible.

OUTPUT: The Output control is used to increase the signal level after gain reduction. Up to +15dB of gain make-up is available.

METER: The VU meter can indicate input level, output level, or gain reduction. Input and output levels are referred to 0VU = +4dBu. The trim for zero gain reduction is located below the selector switch.

IN/BYPASS: 'Hard' bypass switches for comparing the processed sound directly with the original source.

LINK/SPLIT: Links the two channels for stereo operation. When linked, the Threshold and dynamics processing (fast, preset and manual modes), and IN/BYPASS are controlled entirely by Channel 1. The Input and Output controls for the two channels should be set to the same values.

MODE: Selects the three sidechain operating modes for dynamic control:

FAST: The 6386 and ES-8 gain control tubes are capable of very fast operation.
In this mode, the attack and release times are 0.5ms and 50ms respectively.

Presets: These six attack/release time settings are identical to the presets on the classic Fairchild 670 limiter. Presets 5 and 6 are program-dependent.

Manual: The attack and release times are continuously variable
from 1-100ms and 0.1-2s respectively.

SIDECHAIN INSERTS: TRS 1/4" jacks for inserting an outboard EQ into the sidechain. Use for frequency-dependent compression or de-essing. Tip is send, and Ring is return. In Link mode, both inserts are active.

INPUTS and OUTPUTS: The XLR and 1/4" connectors for each channel are wired in parallel. Pin 2 (Tip) is positive phase and Pin 3 (Ring) is negative phase. Input impedance is 10Kohms, transformer-balanced. Output impedance is 600 ohms, active-balanced.