BUC 202

Two Channel Audio BUC - Balanced and Unbalanced Converter
Key Features
  • Converts unbalanced audio signals to balanced signals and balanced signals to unbalanced signals
  • Active balancing circuitry
  • Audio line driver for long distance audio signal transmission
  • Independent, variable trim control on each channel with wide, 42 dB adjustment range
  • Versatile 1U, quarter rack width enclosure allows installation on a rack rail, beneath a table, or within a lectern
  • Patented ZipClip™ 200 mounting kit included:
    - Mounts securely on a variety of surfaces, including rack rails, tables, lecterns, and table legs
    - Wire tie slots for proper strain relief and dressing of excess cable
    - Quick release tab allows for easy installation and removal
The Extron BUC 202
Model Version Description Part #
BUC 202 Balanced-Unbalanced Audio Converter 60-1370-01

The Extron BUC 202 is a two channel balanced and unbalanced audio converter, and audio line driver. It features two balanced or unbalanced inputs and outputs, both on captive screw connectors. The BUC 202 provides two independent channels of signal matching between unbalanced and balanced audio equipment. Two rotary switches provide precise trim adjustment from -21 to +21 dB in clearly-labeled 3 dB steps. In addition to serving as an interface from consumer products to professional AV systems, the BUC 202 is a high-quality line driver for sending and receiving audio signals up to 1,000 feet (300 m). The unique 1U, quarter rack width enclosure, together with the included patented ZipClip™ 200 mounting bracket, offers the versatility to install the BUC 202 in a discreet location, such as on a rack rail, beneath a table, or within a lectern.


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BUC 202
   Gain -21 dB to 21 dB, 3 dB increments, independent channels
   Gain error ±0.1 dB
   Frequency response 20 Hz to 20 kHz, ±0.5 dB
   THD + Noise 0.05% @ 1 kHz at maximum output level
   S/N >100 dB, at 0 dB gain
   Stereo channel separation >80 dB @ 1 kHz
Audio input
   Number/signal type 1 stereo, balanced/unbalanced
   Connectors (1) 3.5 mm captive screw connector, 5 pole
   Impedance >10k ohms unbalanced/balanced
   Nominal level -10 dBV to +4 dBu, adjustable
   Maximum level +25 dBu, balanced, +20 dBu unbalanced
   CMRR 75 dB typ @ 1 kHz
    NOTE     0 dBu = 0.775 Vrms, 0 dBV = 1 Vrms, 0 dBV ≈ 2 dBu.
Audio output
   Number/signal type 1 stereo, balanced/unbalanced
   Connectors (1) 3.5 mm captive screw connector, 5 pole
   Impedance 50 ohms unbalanced, 100 ohms balanced
   Maximum level +25 dBu balanced, +19 dBu unbalanced
   Power supply Internal
Input: 100-240 VAC, 50-60 Hz
   Power consumption  2.9 watts
   Temperature/humidity Storage: -40 to +158 °F (-40 to +70 °C) / 10% to 90%, noncondensing
Operating: +32 to +122 °F (0 to +50 °C) / 10% to 90%, noncondensing
   Cooling Convection, no vents
   Thermal dissipation 9.9 BTU/hr
      Rack mount Yes, with optional 1U rack shelf, with the included ZipClip 200 mounting clip, or by securing to rack rails with tie wraps
      Furniture mount Yes, with the included ZipClip 200 mounting clip
      Pole mount Yes, using tie wraps
   Enclosure type High impact, high temperature plastic
   Enclosure dimensions 1.7" H x 4.3" W x 4.5" D (1U high, quarter rack wide)
(4.2 cm H x 11.0 cm W x 11.4 cm D)
   Product weight 0.8 lb (0.4 kg)
   Shipping weight 3 lbs (2 kg)
   Vibration Operating: 10-250 Hz, 0.25 Gp-p, 3 axes, 15 min. sweep
   Regulatory compliance 
      Safety CE, c-UL, UL
      EMI/EMC CE, C-tick, FCC Class B, ICES, VCCI
      Environmental Complies with the appropriate requirements of RoHS, WEEE
   Product warranty 3 years parts and labor
   Everlast power supply warranty 7 years parts and labor
    NOTE     All nominal levels are at ±10%, and all specifications are tested at unity gain unless otherwise noted.
    NOTE     Specifications are subject to change without notice.
Shipping Dimensions and Weights
    Part # Height Width Depth Weight
    60-1370-01 10.5" (26.7 cm) 7.5" (19.1 cm) 2.94" (7.5 cm) 1.5 lbs (0.68 kg)


Application Diagram

Panel Drawing

Panel Drawing
© 2020 Extron. Specifications are subject to change without notice.