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’