Henry Engineering Patchbox II

Henry Engineering U.S.D.A. (Utility Summing & Distribution Amplifier) is a unique 2x4 mini-DA that can be used to combine or split audio signals for distribution. It can be used as a 1x4 or 2x4 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 26 dB range. All circuitry is transformerless and directcoupled for sonic accuracy.

Henry Engineering AES Digital DA 2X4 is a distribution system for digital audio signals. It can accept either an AES or S/PDIF digital audio stream, and create four identical AES outputs. The AES DA is 100% bit-accurate and transparent to the source, adding absolutely no delay or latency to the signal. The AES input and all four AES outputs are individually transformer balanced and isolated from ground. The S/PDIF input signal is converted to an AES standard level and source impedance. The AES I/O is via XLR connectors; Pin 1 is connected to the AC “safety” ground. The S/PDIF input is via an RCA connector; the shield is isolated from the AC ground. No user adjustments or calibration is necessary.