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AUDIO INTERFACES
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STEREO TO MONO CONVERTERS
Redbox - Stereo To Mono Converters
RB-SM2 Dual Stereo To Mono Converter
The RB-SM2 is a dual version of the
RB-SM1, consisting of two independent
converters which will produce two
fully buered and balanced mono line
outputs from two stereo inputs.
All connections are on the rear panel.
The XLR-3 inputs are electronically
balanced with an impedance of
20kΩ bridging. These can be wired
unbalanced to accept an output from
domestic equipment.
The XLR-3 line outputs are electronically
balanced with an output impedance
of <50Ω. The outputs can be wired
unbalanced by grounding the non-phase
signal, allowing you to feed both balanced
and unbalanced equipment.
Output gain adjustment using pre-set
potentiometers for both converters allows
a normalised mono output from domestic
stereo equipment. The potentiometers are
accessible through the rear panel.
Audio Specication For RB-SM2
Maximum +28dBu
Input Level:
Maximum +28dBu
Output Level:
Input >20kΩ balanced bridging
Impedance:
Output <50Ω balanced
Impedance:
Frequency 20Hz to 20kHz ±0.1dB (600Ω load,
Response: ref 1kHz)
Gain Range: Adjust -8dB to +18dB gain, ref. 0dB
input on L and R
Common >66dB typically
Mode Rejection:
Distortion: 0.01% THD @ 1kHz, ref +8dBu output
Noise: -100dB, unity gain, ref +8dBu output
Connections
Inputs: 4 x XLR 3 pin female (Balanced, can be
unbalanced)
Outputs: 2 x XLR 3 pin male (Balanced, can be
unbalanced)
Mains Input: Filtered IEC, switchable 110-120V, or
220-240V, fused, 6W max
Fuse Rating: Anti-surge fuse 100mA 20 x 5mm
(230VAC)
Anti-surge fuse 250mA 20 x 5mm
(115VAC)
Equipment Type
RB-SM2: Dual stereo to mono converter
Physical Specication
Dimensions 28cm (W) x 10.8cm (D) x 4.2cm (H) (1U)
(Raw): 11” (W) x 4.3” (D) x 1.7” (H) (1U)
Dimensions 36cm (W) x 20.5cm (D) x 6cm (H)
(Boxed): 14.2” (W) x 8” (D) x 2.4” (H)
Weight: Nett: 1.05kg Gross: 1.50kg
Nett: 2.3lbs Gross: 3.3lbs