Handbook

4
Redbox User Handbook No 2
Technical Specications
Audio Specications
Maximum Input Level: +28dBu
Input Impedance: >10kΩ
Output Impedance: <50Ω
Maximum Output Level: +28dBu
Distortion: 0.01% THD @ 1kHz ref +8dB output
Noise: -100dB unity gain, ref +8dB output
Common Mode Rejection: >66dB typically
Frequency Response: 20Hz to 20kHz ±0.1dB (600Ω load, ref 1kHz)
Gain Range: Balanced output: -15dBu to 15dBu, ref -15dBu into
unbalanced RCA input
Connections
Inputs: 2, 4 (RB-UL2) or 8 (RB-UL4) x RCA phono (unbalanced)
Outputs: 2, 4 (RB-UL2) or 8 (RB-UL4) x XLR 3 pin male (balanced)
Mains Input: Filtered IEC, 110V-120V, or 220-240V switchable, fused,
6W maximum
Fuse Rating: Anti-surge fuse 100mA 20 x 5mm (230VAC)
Anti-surge fuse 250mA 20 x 5mm (115VAC)
Equipment Type
RB-UL1: Single stereo unbalanced to balanced converter
RB-UL2: Dual stereo unbalanced to balanced converter
RB-UL4: Quad stereo unbalanced to balanced converter
Physical Specications
RB-UL1 & RB-UL2:
Dimensions (Raw): 28cm (W) x 10.8cm (D) x 4.2cm (H) (1U)
11” (W) x 4.3” (D) x 1.7” (H) (1U)
Dimensions (Boxed): 36cm (W) x 20.5cm (D) x 6cm (H)
14.2” (W) x 8” (D) x 2.4” (H)
Weight RB-UL1: Nett: 1.00kg Gross: 1.45kg
Nett: 2.2lbs Gross: 3.2lbs
Weight RB-UL2: Nett: 1.05kg Gross: 1.5kg
Nett: 2.3lbs Gross: 3.3lbs
RB-UL4:
Dimensions (Raw): 48cm (W) x 10.8cm (D) x 4.2cm (H) (1U)
19” (W) x 4.3” (D) x 1.7” (H) (1U)
Dimensions (Boxed): 53cm (W) x 20.5cm (D) x 6cm (H)
21” (W) x 8” (D) x 2.4” (H)
Weight: Nett: 1.3kg Gross: 1.9kg
Nett: 2.9lbs Gross: 4.2lbs
MATCHING CONVERTERS - RB-UL1, RB-UL2, RB-UL4
MATCHING CONVERTERS
1