There are 2 types of power amplifiers in sintronic production line: analog power amplifier and digital power amplifier. The power amplifier has 2 types of speaker outputs: low current (resistance fixed) output at 4-16Ω) and high current (voltage fixed) output at 70V/100V.
Sintronic analog power amplifiers use industrial circuit board and are simple and stable design for audio projects. They are equipped with 70V/100V speaker output and 4-16 ohms speaker output.

The 4-16 ohms speaker output ensures better sound effect while the 70V/100V speaker output ensures long distance transfer with best sound quality. They are ideal choice for Public Address Audio projects and Commercial Audio projects.

The amplifier AP series is dc power amplifier and designed for commercial and industrial public address applications. Rack mount design in 2U type and rated power is 250W/380W/500W.
AP series is a 70vamplifier. Both balanced and unbalanced line inputs are available for each channel. Balanced line output feeds to another power amplifier as well as secures the signal transmission is less noise and longer distance. 70V, 100V and 4Ω speaker outputs are convenient for installation when selection different speaker matching. A master volume control is included. Complete protection includes clip, short circuit, high temp and overload. With indications for power, signal, clip, protection and temp. Not only this product is the best power amplifier, but also professional power amplifier.

Features
● Transformer isolated 100V, 70V and 4Ω outputs, balanced, no grounding.
● 5 LED indicators for status display .
● XLR socket and 6.3 mm jack for amplifier link.
● Short circuit output protection & LED display.
● Series amplifiers of high output power available.
● 220V AC Power and 24V DC Power working voltage.

Technical Parameters:

Power AC220V/50Hz
Noise ratio Mic: >68dB Line: >82dB
Total harmonic distortion <0.1% at 1KHz
Frequency response 60Hz-18KHz (±2dB)
Tone Bass: ±10dB at 100Hz, Treble: ±10dBB at
10KHz
Radio frequency range: 76MHz-108MHz
Microphone input sensitivity & impedance:
8mV/600Ω unbalanced
Line input sensitivity & impedance: 250mV/10KΩ
unbalanced
Line output sensitivity & impedance: 1V/600Ω
unbalanced