Extron electronic RAC 104 User Manual

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Extron
SW 6AV

Switcher

Mixer

RS-232
Control

Microphone

Zone 2

Zone 1

Extron
RAC 104

Volume and Tone
Controller

Extron
HPA 1001-70V

Audio Power
Amplier

Extron
SI 26CT

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SI 28

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Extron
HPA 502

Half Rack Power
Amplifer

China

+ 86.21.3760.1568 / +4 00.883.1568
+ 86.21.3760.1566 FAX

Japan

+81.3. 3511.76 55
+81.3. 3511.76 56 FA X

Europe

+31.33 .453.4 040 / +800. 3987.6673
+31.33 .453.4 050 FA X

Dubai

+97 1.4.2 991800
+97 1.4.2 991880 FA X

Asia

+65.6 383.440 0 / +800.7339. 8766
+6 5.6383.46 64 FA X

China

+ 86.21.3760.1568 / +4 00.883.1568
+ 86.21.3760.1566 FAX

Japan

+81.3. 3511.76 55
+81.3. 3511.76 56 FA X

Europe

+31.33 .453.4 040 / +800. 3987.6673
+31.33 .453.4 050 FA X

Dubai

+97 1.4.2 991800
+97 1.4.2 991880 FA X

Asia

+65.6 383.440 0 / +800.7339. 8766
+6 5.6383.46 64 FA X

RAC 104

Four Channel Volume and Tone RAC - Remote Audio Controller

s ig n A l P r o ce ss o r s

feAture s

• Inputs: Captive screw connectors

• Outputs: Captive screw connectors

• 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

• Compatible with any audio amplifier

• Selectable professional and consumer audio levels

• Front panel security lockout

• Rack-mountable 1U, quarter rack width metal enclosure

• External universal power supply included, part # 70-055-01

desc ri Pt io n

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. Part of the VersaTools® line of products, the
RAC 104 is housed in a 1U, quarter rack width metal enclosure, and is rack, under-desk, and/or
through-desk mountable.

Aud io in Put

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

Aud io ou tPu t

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

Maximum level (Hi-Z) .. . .. .. . .. . >+20 dBu, balanced or unbalanced at 1% THD+N

group

NOTE: 0 dBu = 0.775V, 0 dBV = 1V, 0 dBV ≈ 2 dBu.

con tr ol / r em ote — re mo te Vol um e / to ne co ntr ol ler

Serial control port . . .. .. . .. .. .. . . RS-232, 3.5 mm captive screw connector, 3 pole

Baud rate and protocol . .. . .. .. . 9600, 8 data bits, 1 stop bit, no parity

Serial control

pin configurations . .. . .. .. . .. .. . . 1 = TX, 2 = RX, 3 = GND

Program control . .. .. .. . .. .. . .. .. Extron’s control/configuration program for Windows®

Extron’s Simple Instruction Set (SIS™)

Gen er Al

External power supply . .. . .. .. . 100 VAC to 240 VAC, 50/60 Hz, external, universal; to 12 VDC, 1 A, regulated

Power input requirements . .. . . 12 VDC, 0.2 A

Rack mount . .. . .. .. . .. .. . .. .. . .. . Yes, with optional 1U rack shelf, part #60-190-01 or 60-604-01; or

Enclosure type .. .. .. . .. .. . .. .. . .. Metal

Enclosure dimensions . .. . .. .. . . 1.7" H x 4.3" W x 3.0" D (1U high, quarter rack wide)

Product / Shipping weight . .. . . 0.5 lbs (0.3 kg) / 2 lbs (1 kg)

VersaTools® rack shelf, part #60-190-20 or 60-604-20.
Also furniture mountable with optional brackets

4.3 cm H x 10.9 cm W x 7.6 cm D (Depth excludes connectors and knob.)

sPec if ic Ati on s

Aud io

Gain .. .. . .. .. .. . .. .. . .. .. . .. .. . .. .. . Unbalanced output: -6 dB; balanced output: 0 dB when input gain is set to 0 dB,

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

Crosstalk . .. . .. .. . .. .. . .. .. .. . .. .. . <-120 dB @ 1 kHz

Stereo channel separation . .. . >80 dB @ 1 kHz, >60 dB @ 20 kHz

CMRR .. .. .. . .. .. . .. .. . .. .. . .. .. . .. . >75 dB @ 20 Hz to 20 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.

model Version d escriPtio n PArt #

RAC 104 Volume & Tone Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60-561-01

oPtionAl Accessori es model des criPtion PAGe PArt #

RSU 129 1U 9.5" Deep Universal Rack Shelf Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 819 60-190-01

RSF 123 1U 3.5" Deep VersaTools® Rack Shelf Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 818 60-190-20

RSB 129 1U 9.5" Deep Basic Rack Shelf . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 820 60-604-01

RSB 123 1U 3.5" Deep Basic Rack Shelf . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 818 60-604-20

PMK 300 Multi-Product Projector Mount Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 813 70-374-01

output volume is at 100, and the input and output are set to the same level via
the Line Level DIP switch

671