Henry Engineering USDA 2X4 – UTILITY SUMMING & DISTRIBUTION AMPLIFIER
The Henry Engineering USDA 2X4 is one of our most popular products because it has so many uses. It’s a stereo distribution amplifier that can send audio to multiple places, or combine stereo to mono, or do both! Keep one handy for emergencies.
Product Description
U.S.D.A. (Utility Summing & Distribution Amplifier) is a unique 2×4 mini-DA that can be used to combine or split audio signals for distribution. It can be used as a 1×4 or 2×4 DA in stereo or mono.
There are 2 inputs (1 stereo pair) and 4 outputs (2 stereo pairs). Front panel “Stereo/Mono” switches select either a stereo or mono output from each output pair. USDA can produce both stereo and mono outputs simultaneously from a stereo source. Inputs and outputs can be operated either balanced or unbalanced. The audio level of each output can be adjusted over a 26db range. All circuitry is transformerless and direct-coupled for sonic accuracy.
Connections are via plug-in euroblock connectors. USDA 2X4 is 1/3 rack width and can be mounted in an optional rack shelf, or wall mounted with optional wall/cabinet mounting brackets. USDA 2X4 is powered by an internal AC power supply.
Technical Specifications
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Input Level-14 to +8 dBm nominal
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Input Impedance20K ohms bal, 10K ohms unbal
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Output Level0 to +8 dBm nominal, +26 dBm max
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Output Load600 ohms or higher per output, bal
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ControlsOutput Level for each channel
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Gain-12 to +14 dB
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Frequency ResponseDC to 20kHz, ±0.25 dB
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Distortion<.01% IM/THD
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Noise>80 dB below nominal output, typ
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Power Requirements115/230VAC, 50/60Hz, 3 W
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Physical Size5.7”w X 1.7”h X 6.0”d, 3lbs
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ConstructionSteel enclosure
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MountingTable top, optional rack mount shelf,
optional wall/cabinet mounting brackets -
ApprovalCity of Los Angeles Elect. Test Lab
