The TMPA-1 is a dynamic microphone (moving coil) pre-amplifier designed to be used with the TOA PM-660U (or any other desktop paging type microphone utilizing a dynamic type microphone cartridge). The TMPA-1 features both balanced and unbalanced "line level" audio outputs. The TMPA-1 Connects to PA system line inputs, PC line inputs and any other equipment accepting balanced or Unbalanced line level audio. Two modes available for PTT (Push to talk) switch input: switch pass through or pre-amplifier mute. Features: Ultra low noise pre-amplifier IC. Lo Z, balanced, microphone input. Frequency response: 20-20KHZ Adjustable gain (40db to 60db) Switch selectable PTT (Push to talk) mode: switch pass through or pre-amplifier mute. Input impedance:1k Ohms RFI and ESD protected microphone input. Two line outputs: One balanced, one unbalanced Line level output (0db), Impedances: 100 Ohms. Wide dynamic range output. Outputs short circuit protected. Power: 12Vac @ 20mA. Auto-reset fused. Terminal block input / output connections Temperature range 0-70C Dimensions: L 3.3x W 2.0 x H 1.6 Weight .08kg Includes: TMPA-1 pre-amplifier. 12Vac 200ma AC adapter. Installation instructions. Wiring requirements: Balanced output:2 conductor shielded (with drain wire) 22 gauge stranded. Max cable length 1000’ or high quality microphone cable.Unbalanced output: Standard audio coaxial cable. Max cable length 1000’
