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5
SUM-4 Installation and Operation Manual
SPECIFICATIONS
SPECIFICATIONS
Input Level
+4dBu nominal
Input Impedance
20K
Ω
balanced, 10 K
Ω
unbalanced
Expansion Input Level
-2dBv nominal, @ 40K
Ω
unbalanced input exp input
Stereo Output level
+4dBu nominal, +24dBu max, @ 600
Ω
Stereo and Monaural
100
Ω
balanced, 47
Ω
unbalanced
Output Impedance
Monaural Output level
+4dBu nominal, + 24dBu max, @ 600
Ω
System Gain
Off to 12dB
Frequency Response
20 to 20kHz, +/- 0.1dB
Noise
84dB below nominal, output
THD
.009%, any frequency
IMD
.008% (250/7kHz)
Xtalk
<80dB @ 2 kHz
TDR
> 100dB
Connectors
Audio Inputs/Outputs – Removable screw terminals
Power Requirement
16 Vac, 600 ma, wall transformer, Supplied. Screw
terminals for external powering up to three additional
SUM-4’s from one wall transformer. (220 Vac 50-60
Hz CE wall transformer OPTIONAL)
Size
4.20" x 6.00” x 1.55", Painted steel chassis w/ 4 – 6-
32 mounting holes
Weight
2.0 lb.
Options
RA-1, Rack Shelf. 1 RU.
