DSPPA MP300PIII – 120W Mixer Amplifier with 3 MIC & 2 AUX Inputs, 70V/100V Commercial Public Address System
The DSPPA MP300PIII is a professional mixer amplifier with built-in preamplifier designed for commercial public address systems requiring stable performance, multiple microphone inputs, and reliable voice broadcasting. It delivers 120W output with flexible audio control, making it ideal for paging, announcements, and background music in medium-scale installations.
Technical Specifications:
Amplifier System:
- Type: Mixer Amplifier with Built-in Preamplifier
- Model: MP300PIII
- Rated Output Power: 120W
- Output Modes:
- 70V / 100V constant voltage
- P1 low-impedance output
Audio Inputs:
Microphone Inputs:
- 3 × MIC inputs
- Input Sensitivity: ≤3.3mV (unbalanced)
Line Inputs / Outputs:
- 2 × AUX inputs
- 1 × AUX output (≥700mV)
Audio Performance:
- Frequency Response: 80Hz – 16kHz (±3dB)
- Total Harmonic Distortion: ≤1%
- Signal-to-Noise Ratio: ≥74dB
Tone Control:
- Bass: ±10dB @ 100Hz
- Treble: ±10dB @ 10kHz
Priority Function:
- MIC1 priority override
- Attenuation: 0 to -30dB
Ensures clear announcements over background audio.
Monitoring & Indicators:
- 5-segment LED level meter
According to the front panel (page 2), the amplifier includes LED level indicators, MIC and AUX controls, and tone adjustment knobs for full system monitoring.
Control Features:
- Independent volume control for:
- MIC1 / MIC2 / MIC3
- AUX1 / AUX2
- Master tone control (Bass / Treble)
Protection System:
- AC fuse protection
- DC output protection
- Overload protection
- Short-circuit protection with alarm indication
Power & Electrical:
- Power Supply: AC 220V / 50Hz
- Power Consumption: 250W
Physical Specifications:
- Dimensions: 483 × 338 × 88 mm
- Net Weight: 9 kg
- Gross Weight: 10.8 kg
Key Features:
- 120W output power
- 3 microphone inputs
- 2 AUX inputs + 1 AUX output
- MIC1 priority override
- 70V / 100V output support
- Bass & treble control
- LED level monitoring
- Full protection system with alarm
- Rack-mount professional design
Applications:
- Schools
- Offices
- Mosques
- Conference rooms
- Retail stores
- Factories
- Paging systems
- Background music systems
- Medium commercial PA systems
Connect Gates Professional Opinion:
From Connect Gates’ perspective, the MP300PIII is a reliable and straightforward PA amplifier focused on voice clarity and stability. Compared to models like MP250UB, it does not include Bluetooth or USB, but it offers strong performance for microphone-based systems. It is ideal for environments where announcements and speech clarity are the main priority rather than multimedia playback.