RAC 104

Four Channel Volume and Tone RAC - Remote Audio Controller
Key Features
  • Independent control of four audio channels
  • Volume and tone control via front panel or RS-232
  • Smooth, 0.5 dB volume transitions
  • Three presets per channel for input gain, volume, bass, and treble
  • Compatible with stereo or mono audio systems
  • Selectable professional and consumer audio levels
The Extron RAC 104
Model Version Description Part #
RAC 104 Volume & Tone Controller 60-561-01

The Extron RAC 104 Four Channel Volume and Tone Remote Audio Controller provides four channels for controlling volume, bass, and treble when placed between a switcher and an audio power amplifier. It can be configured for a variety of applications to control mono and stereo audio distribution in such environments as classrooms and meeting rooms.

The RAC 104 offers simple, intuitive operation, and features two channel selection buttons - two channels per button - with corresponding LED indicators. It provides direct access to volume, bass, and treble adjustments utilizing a front panel adjustment knob. All inputs and outputs of the RAC 104 are on captive screw connectors for balanced and unbalanced audio signals, facilitating integration-friendly installation. The RAC 104 is housed in a 1U, quarter rack width metal enclosure, and is rack, under-desk, and/or through-desk mountable.

Features

OPTIONAL ACCESSORIES
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  RSF 123 Rack Shelf Kit for 3.5" Deep Products
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Specifications

RAC 104
Audio
   Gain Unbalanced output: -6 dB; balanced output: 0 dB,
when input gain is set to 0 dB, output volume is at 100, and the input and output are set to the same level via the Line Level DIP switch
   Frequency response 20 Hz to 20 kHz, ±0.05 dB
   THD + Noise 0.03% @ 1 kHz at nominal level
   S/N >90 dB, balanced at maximum output (unweighted)
   Crosstalk <-120 dB @ 1 kHz
   Stereo channel separation >80 dB @ 1 kHz, >60 dB @ 20 kHz
   CMRR >75 dB @ 1 kHz
   Volume control range -100 dB to 0 dB (volume numbers 0 through 100) in 0.5 dB steps
    NOTE     Attenuation = volume number minus 100.  The default is -30 dB = volume number 70.
   Bass control range ±14 dB, 100 Hz referenced to 1 kHz (0 through 14) in 2 dB steps
    NOTE     Bass dB = (bass number minus 7) times 2.  The default is 0 dB = bass number 7.
   Treble control range ±14 dB, 10 kHz referenced to 1 kHz (0 through 14) in 2 dB steps
    NOTE     Treble dB = (treble number minus 7) times 2.  The default is 0 dB = treble number 7.
Audio input
   Number/signal type 4 channels, which can be mono or tied into stereo pairs, balanced/unbalanced
   Connectors (2) 3.5 mm captive screw connectors, 5 pole
   Impedance >18k ohms unbalanced/balanced, DC coupled
   Nominal level +4 dBu (1.23 V), -10 dBV (316 mV), switchable per group
   Maximum level +20 dBu (7.75 V), (balanced or unbalanced) at 1% THD+N
   Input gain adjustment -12 dB to +12 dB
    NOTE     0 dBu = 0.775 Vrms, 0 dBV = 1 Vrms, 0 dBV ≈ 2 dBu
Audio output
   Number/signal type 4 channels, which can be mono or tied into stereo pairs, balanced/unbalanced
   Connectors (2) 3.5 mm captive screw connector, 5 pole
   Impedance 50 ohms unbalanced, 100 ohms balanced
   Nominal level +4 dBu (1.23 V), balanced; -10 dBV (316 mV), unbalanced; switchable per group
   Maximum level (Hi-Z) >+20 dBu, balanced or unbalanced at 1% THD+N
Control/remote — remote volume/tone controller
   Serial control port RS-232, 3.5 mm captive screw connector, 3 pole
   Baud rate and protocol 9600 baud, 8 data bits, 1 stop bit, no parity
   Serial control pin configuration 1 = TX, 2 = RX, 3 = GND
   Program control Extron control/configuration program for Windows®
Extron Simple Instruction Set (SIS)
General
   External power supply 100 VAC to 240 VAC, 50-60 Hz, external to 12 VDC, 0.5 A, 6 watts, regulated
   Power input requirements 12 VDC, 0.2 A
   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
   Mounting 
      Rack mount Yes, with optional 1U rack shelf
      Furniture mount Yes, with optional brackets
      Pole mount Yes, with optional pole mount kit
   Enclosure type Metal
   Enclosure dimensions 1.7" H x 4.3" W x 3.0" D (1U high, quarter rack wide)
(4.3 cm H x 10.9 cm W x 7.6 cm D)
(Depth excludes connectors and knob.)
   Product weight 0.5 lbs (0.3 kg)
   Regulatory compliance CE, C-tick, c-UL, UL, FCC Class A, ICES, VCCI
   Product warranty 3 years parts and labor
   Everlast power supply warranty 7 years parts and labor
    NOTE     All nominal levels are at ±10%.
    NOTE     Specifications are subject to change without notice.
(4431-D8)
Shipping Dimensions and Weights
    Part # Height Width Depth Weight
    60-561-01 2.44" (6.2 cm) 7.13" (18.1 cm) 9.5" (24.1 cm) 1.95 lbs (0.88 kg)

Diagram

Application Diagram

Panel Drawing

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