ASA 141 – Passive Audio Summing Adapter with RCA Inputs and Balanced/Unbalanced Output
Key Features
- Converts unbalanced stereo audio to balanced or unbalanced mono audio
- Resistor network provides passive audio summing
- Internal transformer provides balanced output and isolates signal from load to prevent ground loops
- Compact design for easy installation into small spaces or behind equipment in a rack
| ASA 111, ASA 121, ASA 131, ASA 141 | |||
| 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. | ||
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| ASA 141 | See the table below. Tested with a 20k ohm output load. Gain numbers are ±2 dB. | ||
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| 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) | ||
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| Audio output | |||
| 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 | ||
| Ambient 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 | ||
| Product warranty | 3 years parts and labor | ||
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The Extron ASA 141 Audio Summing Adapter is a convenient, single-cable solution for combining two-channel stereo audio into a balanced or unbalanced mono audio signal. It is 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 it is a small and passive device, the ASA 141 is especially useful in systems where power and space are limited.
The ASA 141 includes two 6 inch leads with male RCA connectors for stereo input signals and captive screw connectors for balanced/unbalanced mono audio output. It is designed as a 2 foot long adapter with a resistor network to properly sum stereo signals without signal loss or damage to source equipment.
Features
- Converts unbalanced stereo audio to balanced or unbalanced mono audio
- Input: Male RCA connectors
- Output: Captive screw terminal
- Resistor network provides passive audio summing
- Internal transformer provides balanced output and isolates signal from load to prevent ground loops
- Wide frequency response from 20 Hz to 20 kHz
- Compact design for easy installation into small spaces or behind equipment in a rack
- 2 foot (60 cm) length