- MA802 Two-Zone Mixer Amplifier with Built-in USB, FM & Bluetooth
● Features a new aluminum alloy front panel and a front-to-rear forced-air cooling design.
● Powered by a switch-mode power supply (SMPS).
● Provides two audio inputs, including one line input and one standard microphone input.
● Provides one audio output for looping the audio signal to the input of the next power amplifier.
● Supports both 4–16Ω constant-impedance output and 100V constant-voltage output.
● Equipped with comprehensive electronic protection circuits for fast response to abnormal operating conditions, with status indicated by front-panel LEDs.
● Front-panel indicators display audio signal levels and operating status.
Description
The MA802 is a compact 80Wmixeramplifier featuring Class D amplification and a switch-mode power supply for efficient operation and stable audio performance. With both 100V constant-voltage and 4–16Ωconstant-impedance outputs, it offers flexible compatibility with different speaker systems.
Equipped with line and standard microphone inputs, the MA802 also supports USB, FM, and Bluetooth audio playback for background music and microphone announcements. Independent volume controls, adjustable bass and treble, microphone priority, and multiple protection circuits provide convenient operation and reliable performance for everyday sound reinforcement applications.
Specification
|
Model |
MA802 |
|
|
Total Output Power |
80W |
|
|
100V Output Power / Z1/Z2 Power Distribution |
125Ω |
125ΩX2 |
|
80W×1 |
40W×2 |
|
|
8Ω Output Power / Z1/Z2 Power Distribution |
25V |
|
|
80W×1 |
40W×2 |
|
|
4Ω Output Power / Z1/Z2 Power Distribution |
18V |
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|
80W×1 |
40W×2 |
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|
Constant-Voltage Output Frequency Response |
100Hz–20kHz (0/-1dB) |
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Constant-Impedance Output Frequency Response |
20Hz–20kHz (0/-1dB) |
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|
Total Harmonic Distortion (THD%) |
≤0.1% |
|
|
Signal-to-Noise Ratio |
AUX: >96dB (A-weighted); MIC: 66dB (A-weighted) |
|
|
Line Input |
AUX1/MP3, 350mV / 10kΩ, unbalanced |
|
|
Microphone Input |
1 × 6.35mm standard microphone input, 5mV / 600Ω, unbalanced |
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|
Audio Interfaces |
1 × RCA line input; 1 × 6.35mm microphone input |
|
|
Treble Control |
±10dB at 10kHz |
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Bass Control |
±10dB at 100Hz |
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|
Overall Efficiency |
75% |
|
|
Power Supply |
AC 100–240V/50Hz |
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Cooling Method |
Front-to-rear forced-air cooling with an aluminum heatsink and fan |
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|
Dimensions (W×D×H) |
246.5×163×44.5 mm |
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|
Net Weight |
2kg |
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Gross Weight |
2.5kg |
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Protection Circuits |
1. Overvoltage Protection: The unit shuts down when the AC supply voltage exceeds 264 ± 5V. 2. Short-Circuit and Overload Protection: Protects the amplifier against output short circuits and overload conditions. 3. Overtemperature Protection: Thermal limiting activates at temperatures ≥85°C. At temperatures ≥95°C, thermal protection mutes the output signal and activates the front-panel protection indicator. 4. DC Output Protection: Activates when the DC output voltage exceeds 5V. The amplifier cannot be restarted after this protection is triggered. 5. Distortion Limiting: Activates when THD reaches ≥1% (±0.5% tolerance). 6. Gradual Volume Increase: After the front-panel protection indicator turns off, the output volume gradually increases to the preset maximum level over 5 seconds. |
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