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Radial ProMS2 passive 2-way Microphone Splitter
The ProMS2 is a balanced mic-level splitter designed to send a signal to three destinations simultaneously on stage, with one transformer-isolated output and two direct outputs. I use this splitter to enable the recording a mic signal clean and through a compressor simultaneously.
Applications
Signal flow
Following the block diagram below, the ProMS2 first routes the input to a -30dB attenuator PAD that allows the ProMS2 to be used with line-level sources. Next, the signal is divided three ways between the DIRECT-1 thru-put, DIRECT-2 output with ground lift and transformer ISOLATED output (also with ground lift). The DIRECT-1 output is a parallel thru-put that allows 48V phantom power from the mixing console to feed back to a condenser mic or active direct box.
The DIRECT-2 output is identical to the DIRECT-1 thru-put, except that it is equipped with a separate ground LIFT switch to help reduce ground loop noise. The DIRECT-2 output can be used to send a balanced, mic-level signal to an alternate device such as a recording system.
The ISOLATED output is used to feed a second mixing console and employs a high performance Eclipse mic bridging transformer to eliminate the hum and buzz caused by ground loops. Ground loops are commonly encountered when connecting two audio systems together and can be heard as hum or buzz in the audio system. The ISOLATED output breaks the ground loop between equipment and allows a second system to operate without noise.
Connecting: Using balanced XLR cables, connect the output of a microphone or direct box to the ProMS2 INPUT. Next, connect the DIRECT-1 output to your primary mixing console. If you are using a condenser microphone or active direct box, turn on the phantom power. It’s important to note that the mixing console supplying +48V phantom power must be connected to the DIRECT-1 thru-put XLR jack. The other outputs, DIRECT-2 and ISOLATED, should not be used to pass phantom power back to the mic or direct box.
Specifications
| Audio circuit type: | Passive |
| Transformer: | Eclipse ET-MS10 |
| Frequency response: | 20Hz ~ 20KHz (+0dB -1dB) |
| Dynamic range: | >140dB |
| Gain: | -0.5dB |
| Total harmonic distortion: | 0.001% |
| Intermodulation Distortion: | 0.003% |
| Phase Deviation: | 1° @ 20Hz |
| Input Impedance: | Source dependent, 10kΩ with Pad on, unbalanced |
| Output Impedance: | Source dependent, 10kΩ with Pad on, balanced |
| Common Mode Rejection Ratio: | -115dB at 60Hz |
| Noise Floor: | -140dB |
| Maximum Input: | +26dBu |
Dcouments
