ASA 100 Series
Signal Processors
ASA 100 Series
Passive ASA - Audio Summing Adapters
ASA 141
Series Features
DESCRIPTION
• Output: Captive screw terminal
The Extron ASA 100 Series of Audio Summing Adapters are convenient, single-cable solutions
for combining two-channel stereo audio into a mono audio signal. They are ideal for summing
stereo signals for use in mono PA systems in churches, halls, arenas, stadiums, and other
environments where stereo signals would result in cancellation. Because they are small and
passive devices, these Audio Summing Adapters are especially useful in systems where power
and space are limited.
• Resistor network provides passive audio summing
• Compact design for easy installation into small spaces or behind equipment
in a rack
• 2 foot (60 cm) length
The ASA 111, ASA 121, and ASA 131 feature connectivity options for popular stereo sources
such as RCA, stereo mini plug, or captive screw connectors. The ASA 141 features RCA input
connectors while an internal transformer provides a balanced output isolating the signal from
load and preventing ground loops. All ASA 100 series products are designed as 2 foot long
adapters with a resistor network to properly sum stereo signals without signal loss or damage
to source equipment.
Extron
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Extron
SI 3CT LP
Full-Range Ceiling
Speakers
2' long
Extron
ASA 141
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Audio Summing
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Extron
XPA 1002-70V
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SIGN
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Power
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Continued
Europe
+31.33.453.4040 / +800.3987.6673
+31.33.453.4050 FAX
Middle East
+971.4.2991800
+971.4.2991880 FAX
Asia
+65.6383.4400 / +800.7339.8766
+65.6383.4664 FAX
China
+86.21.3760.1568 / +400.883.1568
+86.21.3760.1566 FAX
Japan
+81.3.3511.7655
+81.3.3511.7656 FAX
693
Signal Processors
ASA 100 Series
ASA 111
Passive ASA - Audio Summing Adapter with Stereo Mini Plug
Input and Unbalanced Output
Unique Features
• Converts unbalanced stereo audio to unbalanced mono audio
• Input: 3.5 mm stereo mini plug
Model
VERSION DESCRIPTION
ASA 111
Stereo Mini Plug Input.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60-738-01
PART #
ASA 121
Passive ASA - Audio Summing Adapter with RCA Inputs and
Unbalanced Output
Unique Features
• Converts unbalanced stereo audio to unbalanced mono audio
• Input: Male RCA connectors
Model
VERSION DESCRIPTION
ASA 121
RCA Input. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60-739-01
PART #
ASA 131
Passive ASA - Audio Summing Adapter with Captive Screw
Plug Input and Balanced Output
Unique Features
• Converts balanced stereo audio to balanced mono audio
• Input: Captive screw plug
• Designed for use with Extron products featuring balanced audio outputs on
captive screw connectors
Model
VERSION DESCRIPTION
ASA 131
Captive Screw Plug Input. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60-740-01
PART #
ASA 141
Passive ASA - Audio Summing Adapter with RCA Inputs and
Balanced/Unbalanced Output
Unique Features
• Converts unbalanced stereo audio to balanced or unbalanced mono audio
• Input: Male RCA connectors
• Internal transformer provides balanced output and isolates signal from load to
prevent ground loops
• Wide frequency response from 20 Hz to 20 kHz
Model
VERSION DESCRIPTION
ASA 141
RCA Input; Transformer Balanced. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60-804-01
PART #
Continued
694
USA West
+1.714.491.1500 / +800.633.9876
+1.714.491.1517 FAX
USA East
+1.919.863.1794 / +800.633.9876
+1.919.863.1797 FAX
www.extron.com
© 2010 Extron Electronics. All rights reserved.
Pricing and specifications may change without notice.
Signal Processors
ASA 100 Series
SPECIFICATIONS
Audio output
Audio
Gain
ASA 111, ASA 121.................... See the table below. Tested with an unbalanced output and a 20k ohm load.
ASA 131................................... See the table below. Tested with a balanced output and a 20k ohm load.
Input Channel
Output
Left
Right
signal
signal
-1 dB
signal
—*
-7 dB
—*
signal
-7 dB
* Tested with this input remaining connected.
ASA 141................................... See the table below. Tested with a 20k ohm output load. Gain numbers
are ±2 dB.
Input Channel
Output Wiring
Left
Right
Unbalanced
Balanced
0 dB
0 dB
+3 dB
-3 dB
0 dB
open
+3 dB
-3 dB
0 dB
50 ohms
-3 dB
-9 dB
* Tested with this input remaining connected.
Frequency response
ASA 111, ASA 121, ASA 131
20 Hz to 20 kHz, ±0.05 dB
ASA 141 with -10 dBV, +4 dBu, or +15 dBV input
20 Hz to 20 kHz, -3 dB to +1 dB
THD + Noise
ASA 111, ASA 121, ASA 131
0.03% @ 20 Hz to 20 kHz at nominal level
ASA 141
-10 dBV input............................ 0.05%, 1 kHz, 1% from 40 Hz to 20 kHz
+4 dBu input............................. 0.05%, 1 kHz, 1% from 50 Hz to 20 kHz
+15 dBV input........................... 0.05%, 1 kHz, 1% from 80 Hz to 20 kHz
S/N........................................... 130 dB at maximum output
Audio input
Number/signal type
ASA 111, ASA 121, ASA 141
1 stereo, unbalanced
ASA 131................................... 1 stereo, balanced
Connectors
ASA 111................................... (1) 3.5 mm male stereo mini plug (tip-ring-sleeve)
ASA 121, ASA 141.................... 1 pair of male RCA (tip-ring)
ASA 131................................... (1) 3.5 mm captive screw connector, 5-pole
Impedance
ASA 111, ASA 121.................... 22k ohms (with a 20k ohm unbalanced load, one input terminated);
4k ohms (with a 20k ohm unbalanced load, both inputs terminated)
ASA 131................................... 24k ohms (with a 20k ohm balanced load, one input terminated);
7k ohms (with a 20k ohm balanced load, both inputs terminated)
ASA 141................................... 5.4k ohms (with a 20k ohm balanced load, both inputs terminated)
Nominal level
ASA 111, ASA 121.................... -10 dBV (316 mVrms)
ASA 131................................... +4 dBu (1.23 Vrms)
ASA 141................................... -10 dBV (316 mVrms) or +4 dBu (1.23 Vrms)
Maximum level
ASA 111, ASA 121, ASA 131
+24 dBu (12.3 V)
ASA 141................................... +15 dBV (5.6 V)
Number/signal type
ASA 111, ASA 121.................... 1 mono, unbalanced
ASA 131................................... 1 mono, balanced
ASA 141................................... 1 transformer, mono, balanced/unbalanced
Connectors.............................. (1) 3.5 mm direct insertion captive screw connector, 3 pole
Impedance (with 50 ohm input impedance)
ASA 111, ASA 121.................... 1k ohms unbalanced
ASA 131................................... 2k ohms balanced
ASA 141................................... 3.3k ohms balanced (typical)
Nominal level
ASA 111, ASA 121.................... -10 dBV (316 mV)
ASA 131................................... +4 dBu (1.23 V)
ASA 141................................... -10 dBV (316 mV) or +4 dBu (1.23 V)
Maximum level
ASA 111, ASA 121.................... +24 dBu (12.3 V)
ASA 131................................... +24 dBu (12.3 V)
ASA 141................................... +15 dBV (5.6 V)
General
Power...................................... Not powered
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
Rack mount............................. Can be attached to any flat surface with supplied Velcro®.
Enclosure type......................... Molded plastic
Enclosure dimensions
ASA 111, ASA 121, ASA 131
0.7" H x 0.7" W x 1.3" D
(1.8 cm H x 1.7 cm W x 3.4 cm D)
(Depth excludes the 24 inches long pigtail for ASA 121 and the 24 inches long
single cable for the ASA 111 and ASA 131.)
ASA 141................................... 1.1" H x 1.1" W x 1.6" D
(2.8 cm H x 2.8 cm W x 4.0 cm D)
(Depth excludes the 24 inches long pigtail.)
Product weight........................ 0.2 lbs (0.1 kg)
Shipping weight....................... 1 lb (1 kg)
Vibration.................................. ISTA 1A in carton (International Safe Transit Association)
Listings.................................... UL, CUL
Compliances............................ CE, FCC Class A, VCCI, AS/NZS, ICES
MTBF....................................... 30,000 hours
Warranty.................................. 3 years parts and labor
NOTE: All nominal levels are at ±10%.
NOTE: Specifications are subject to change without notice.
NOTE: 0 dBu = 0.775 Vrms, 0 dBV = 1 Vrms, 0 dBV ≈ 2 dBu
Note: For complete specifications, please go to www.extron.com
Europe
+31.33.453.4040 / +800.3987.6673
+31.33.453.4050 FAX
Middle East
+971.4.2991800
+971.4.2991880 FAX
Asia
+65.6383.4400 / +800.7339.8766
+65.6383.4664 FAX
China
+86.21.3760.1568 / +400.883.1568
+86.21.3760.1566 FAX
Japan
+81.3.3511.7655
+81.3.3511.7656 FAX
695
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