Symetrix 425 - Specifications; Input;Output Specifications; Compressor Specifications; Limiter Specifications

12. Specifications
Input/Output
Inputs XLR-female, >30-kilohms line-level balanced bridging, >30-kilohms
unbalanced bridging.
TRS-female paralleled with XLR connector.
Outputs 300-ohm source impedance, balanced. XLR-male
TRS-female wired tip hot, ring & sleeve grounded (unbalanced), 150-
ohm source impedance.
Maximum input level
+20 dBu, balanced
Maximum output level (onset
of clipping/1% THD)
+25 dBu balanced
+23 dBm balanced (600 ohms)
+20 dBu unbalanced
+18 dBm unbalanced (600 ohms)
Sidechain
100-ohm source impedance, 6800-ohm input impedance.
TRS jack, tip is return.
Compressor
Type RMS responding, soft-knee
Attack time 2ms
Release time 180ms to 2.5s long term
Auto-release time 20ms to 1s (based on 20ms tone burst)
Threshold -40 dBu to +20dBu (bypass)
Ratio 1:1 to 10:1
Limiter
Attack time 200µs
Release time 100ms
Threshold -10dBu to +20dBu
Ratio 20:1
Downward Expander
Attack time 4ms
Release time 250ms to 5s
Threshold 0dBu to -40dBu (bypass)
Ratio 1:1.5
12-1
Rev 2.0, 10/29/93