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S P E C I F I C A T I O N S
®
ARCHITECTURAL ACOUSTICS
®
SPECIFICATIONS
Frequency Response:
±1 dB, 5 Hz to 50 kHz
Distortion:
< 0.005% 20 Hz to 20 kHz (EQ Flat
bandwidth limited 10 Hz to 80 kHz)
Output Noise (EQ Flat):
< -94 dBu (ref 0.775V; 20 Hz to 20 kHz)
Dynamic Range (EQ Flat):
> 110 dB (20 Hz to 20 kHz)
Inputs:
Electronically balanced, XLR or
1
/4"
phone TRS
Input Impedance:
> 10 K ohms
Input Common Mode
Rejection Ratio:
> 40 dB
Maximum Input Level:
+25 dBu (14V RMS) ref 0.775V
Outputs:
Electronically balanced, XLR or
1
/4"
phone TRS
Output Impedance:
100 ohms
Maximum Output Level:
+19 dBu (7V) Hi-Z load (ref 0.775V)
+18 dBm 600 ohm load (1 mW)
Filter Frequencies:
32 Hz to 16 kHz on ISO centers
Gain Control Range:
±12 dB
Maximum Boost/Cut:
±12 dB in 12 dB range setting
±6 dB in 6 dB range setting
EQ Band Filter Q:
4.77
Display:
40-character x 2-line Liquid Crystal
Display
Power Consumption:
Domestic: 12 W, 60 Hz, 120 V AC
Export: 12 W, 50/60 Hz, 230 V AC
FEATURES
• 28-band graphic equalizer
• Constant EQ filters on
1
/
3
octave,
ISO centers
• Real-time analyzer
• Automatic room equalization
• Built-in pink noise
• Easy-to-read, 40-character x 2-line
Liquid Crystal Display
• Nonvolatile storage of 128 EQ curves
• Nondestructive EQ curve addition
• EQ curve compare; ±12 dB in 1 dB
steps, ±6 dB in 0.5 dB steps
• Combination XLR-
1
/
4
" phone input
connectors
• Electronically-balanced inputs and
outputs
• Software security lock
• Feedback finder
• MIDI controllable
• MIDI compatible with the original
CEQ
™
28/CEQ
™
28R
• Relay front panel and power-off
bypass
• Switchable 40 Hz subsonic filter
• Single I.U. standard rack space
• Internal power supply
DESCRIPTION
The CEQ
™
280a is a computer-
controlled, MIDI graphic equalizer
designed to meet the needs of sound
reinforcement installations. The circuit
design assures reliable, long-term
operation and smooth, trouble-free
installation.
CEQ
™
280a
Computer-Controlled,
MIDI Graphic
Equalizer
TM
®