PPB-20 Press Patch Box

The Press Patch Box is a special kind of audio signal distributor intended for use at press conferences. It features a separate input for microphone and line signals (from a mixing console output). A high quality input amplifier with a transformer balanced input provides a wide dynamic range. A total of 20 transformer-balanced XLR/m outputs with separate paired driver circuits makes it possible to connect video cameras and other recording equipment. The nominal output level is +4dBu at 600 ohms. Channels 19 and 20 have TRS jack sockets for balanced/unbalanced signals and also phono sockets (=10 dBu nominal level). Where more than 20 outputs are required, additional PPB 20s can be hooked up via a rear BUS IN/OUT socket. Signal monitoring is provided by a 10 LED strip displaying a range of -40 to +10dB (0dB in the display = 4 dBu output) and an adjustable headphones amplifier. The PPB-20 has an integral, shielded power supply unit. An extra DC input makes it possible to connect up a (backup) battery power source. A PW-4 can provide the necessary backup power supply for two PPB-20S.

• Inputs: Transformer balanced, 4 XLR/f type connectors, with paired front/rear parallel connections for separate microphone/line signals
• Nominal input impedences: Microphones 200 ohms; Line 5k ohms
• Maximum input levels: Microphones 0 dBu; Line +20 dBu
• Maximum amplification: Microphones +66 dB; Line +22dB (constantly adjustable via switch and potentiometer)
• Outputs: 20 XLR/m, 2x TRS jacks, 2x phone. All transformer-balanced and floating with separate ground lift switches at rear
• Nominal output impedences: XLR = 300 ohms; Jack/phono = 600 ohms
• Nominal output levels: XLR = +4 dBu/20 max.; Jack/phono =-10 dBu + 6 dBu max.
• Headphone output: Stereo 1/4in. output jack with mono tip + ring
• Designed for use with 8ohm - 200 ohm headphones (constantly adjustable level)
• 10 LED strips displaying a range of -40 to +10 dB
• Bus input/output (mono jack)
• Power supply: 230VAC or +/- 12V to +/- 18VDC, 15 watts
• Housing: 19", 3U, approximately 200mm deep

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