Current preamplifier KT9213

powervoltageaudio

Product Overview
The KT9213/MP3 preamplifier is a next-generation audio preamplifier designed for emergency fire and accident public-address systems. It integrates an MP3 audio source and interfaces with broadcast power amplifiers to provide background music playback and emergency paging functions, supporting microphone broadcast and automatic recording.

Features

• Integrated fire emergency broadcasting function; external trigger port forces the unit into emergency broadcast mode; supports microphone paging and automatic recording.
• LCD display indicates operating status; touch control buttons for straightforward operation; multiple line inputs and a dedicated line output for system integration.
• Compatible with standard broadcast power amplifiers; supports level trigger linkage (DC24V) for alarm systems.

Technical Specifications

• Power supply: DC24V ±10%, <0.5A
• Line input sensitivity: 300mV ～ 775mV (Line1, Line2)
• Line output level: 500mV ±100mV
• Frequency response: 20Hz ～ 20kHz ±0.5dB
• Total harmonic distortion: <5%
• SNR: >70dB
• Emergency trigger mode: Level trigger (DC24V)
• Operating environment: temperature 0℃ - 40℃; relative humidity up to 92%
• Insulation resistance: >20MΩ between power supply and chassis (DC500V)