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DX8 – 31
DX8 Specifications
INPUTS / OUTPUTS
Inputs 1-8: Balanced, Phoenix-type terminals
Bus A and B: Balanced, Phoenix-type terminals, Direct to
Mix Buses
Master Outputs: Balanced, Phoenix-type terminals
Record Outputs A/B: Unbalanced, RCA
Direct Outputs 1-8: Unbalanced on DB15
(bottom row is signal return)
Logic Inputs: 10 Inputs on DB25
Series resistance:570Ω
Internal pull-up: 47kΩ to +5V DC
Input voltage: +5.5V DC maximum
Active voltage: +1.0V DC maximum
Logic Outputs: 10 open-collector Outputs on DB25
Series resistance:550Ω
Internal pull-up: 10kΩ to +5V DC
Active current: 10mA maximum
Active voltage: +0.8V DC max @ 1mA
Serial Ports: 2 RS-232C on DB9 (COMM PORTS)
CONTROLS
Input Trim: 8 Rotary Potentiometers
Input Gain: 2 Pushbuttons per Input
EQ: 2 Pushbuttons for Low, 2 for High
Master Output Gain: 2 Pushbuttons per Output
Mode Select: 1 Pushbutton
Power: Rocker Switch
Phantom Power Select: 8 DIP Switches
INDICATORS
Input Levels: 12-segment LEDs per ch.
Output EQ Levels: 12-segment LEDs per ch.
Mode Status: 3 LEDs; A/B/LOCK
Output Levels: 12-segment LEDs per ch.
Volume Setting: 12-segment LED Bar Graph
LED METER VALUES
1. Red (scale: OL): > –2 dB full-scale (> 16 dBu)
2. Yellow (scale: 2): > –4 dB full-scale (> 14 dBu)
3. Yellow (scale: 4): > –7 dB full-scale (> 11 dBu)
4. Yellow (scale: 7): > –10 dB full-scale (> 8 dBu)
5. Green (scale: 10): > –15 dB full-scale (> 3 dBu)
6. Green (scale: 15): > –20 dB full-scale (> –2 dBu)
7. Green (scale: 20): > –25 dB full-scale (> –7 dBu)
8. Green (scale: 25): > –30 dB full-scale (> –12 dBu)
9. Green (scale: 30): > –35 dB full-scale (> –17 dBu)
10. Green (scale: 35): > –40 dB full-scale (> –22 dBu)
11. Green (scale: 40): > –50 dB full-scale (> –32 dBu)
12. Green (scale: 50): > –60 dB full-scale (> –42 dBu)
SIGNAL PROCESSING
General: Five 32-bit floating-point DSPs
24-bit A/D and D/A converters
512Kx16 Flash ROM
128Kx32 SRAM (with battery backup)
Inputs: 3-band shelving/peaking EQ
Gain: ±15 dB
Frequency:
LO Shelving: 20Hz-500Hz variable
MID Peaking: 20Hz-20kHz variable
HI Shelving: 500Hz-20kHz variable
Automatic Level Control (ALC)
Range: 0 dB to –20 dB
Automix
NOM On/Off
Gate Attenuation Depth: 0 dB to –60 dB
Gate Release Time: 0.5 s or 1.5 s
Outputs: Automatic Level Control (ALC) on each Output
Range: 0 dB to –20 dB
Automix MAX NOM: 1-8
Automix Last Mic On: None, Last, Input 1
2-band shelving EQ on each Output
Gain: ±15 dB
Corner Frequency:
LO: 20Hz-500Hz variable
HI: 500Hz-20kHz variable
1/3-Octave Graphic EQ on each Output
Gain: ±15 dB
ISO-Centered Frequencies: 20, 25,
31.5, 40, 50, 63, 80, 100, 125, 160,
200, 250, 315, 400, 500, 630, 800, 1k,
1.25k, 1.6k, 2k, 2.5k, 3.15k, 4k, 5k,
6.3k, 8k, 10k, 12.5k, 16k, 20k
5-Band Parametric EQ on each Output
Gain: ±15 dB
Center Frequency:
20Hz-20kHz variable
Bandwidth: 0.1 octave to 6 octaves
Compressor/Limiter on each Output
Threshold: –60.0 dB to –1.0 dB
Attack: 1 ms to 2500 ms
Release: 10 ms to 2500 ms
Ratio: 1:1 to 20:1
Output: 0 dB to +20.0 dB
Audio
Noise
(20Hz-20kHz bandwidth, Master Out, channel Trims @ unity gain,
channel EQs flat, all odd channels panned left, even channels
panned right):
Master level @ unity, channel levels @ unity: –82 dBu
Single channel to Master Out: –100 dBu
(referenced to 1% THD+N)
Total Harmonic Distortion (THD+N)
(1kHz @ +10 dBu (unity level) 20Hz-20kHz):
Mic in to Master Out: < 0.005%