Clear-Com SB-704 4-Channel Switchboard Main Station

Clear-Com SB-704 4-Channel Switchboard Main Station 4-Channel Switchboard Main Station - 5-channel X 10 station assignment matrix, no speaker - with built-in 2-amp power supply, rack mount (2RU)SB-704 includes all of the features of the MS-704, with a 4 x10 assignment matrix in place of the internal speaker (external speaker required for station monitoring). The station features a ten-position slide switch matrix that allows assignment of any of the ten intercom lines to any of the four intercom channels, to an isolated separate party-line, or to an off position.Specifications: Panel Microphone Input: Input Type: Electret, Input Impedance: >=2K?, Mic Limiter Threshold: 0dBu ±3dB, Mic Limiter Range (SB-704): >= 15dB Headset Microphone Input: Input Type: Dynamic, Input Impedance: >= 1K?, Mic Limiter Threshold: 0dBu ±3dB, Mic Limiter Range (SB-704): >= 15dB Program Line Input: Maximum Level before Clipping: >= 20dBu, Input Impedance: >= 5K? Headset Output: Load Impedanc