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Amplifier module for line array speakers or subwoofers
AC 90~265V ~50/60Hz
20 Hz - 20 kHz ± 0.5dB
48K DSP processor with FIR function
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Model No.
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DM9.5
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DM10.5
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DM12.5
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DM15.5
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DM20
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DM24
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DM30
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Output
power 1 KHZ/EIA |
Stereo 8 Ω
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900W+500W
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1000W+500W
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1200W+500W
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1500W+500W
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1000W+1000W
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1200W+1200W
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1500W+1500W
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Stereo 4 Ω
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1550W+850W
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1800W+900W
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2150W+900W
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2700W+900W
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2000W
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2400W
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3000W
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Frequency response (BYPASS-ON)
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20 Hz - 20 kHz ± 0.5dB
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Input sensitivity
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1.1V
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1.2V
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1.3V
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1.1V
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1.2V
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1.3V
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1.3V
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THD%: 1/8 RMS, 1KHZ
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<0.05%
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<0.05%
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<0.05%
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<0.05%
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<0.05%
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<0.05%
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<0.05%
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Slew rate(RMS,1KHZ)
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>20V/µs
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>20V/µs
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>20V/µs
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>20V/µs
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>20V/µs
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>20V/µs
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>20V/µs
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damping Factor(RMS,1KHZ)
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>200
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>200
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>200
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>200
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>200
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>200
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>200
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Dynamic Range
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≥95dB
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≥95dB
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≥95dB
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≥95dB
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≥95dB
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≥95dB
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≥95dB
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S/N ratio (A-weighted, RMS)
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≥95dB
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≥95dB
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≥95dB
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≥95dB
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≥95dB
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≥95dB
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≥95dB
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Voltage gain
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34dB
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34dB
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34dB
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34dB
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34dB
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34dB
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34dB
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| Damping Factor(RMS,1KHZ) | >200 | >200 | >200 | >200 | >200 | >200 | >200 | |
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Input impedance
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Balance:20K Ω, unbalanced:10K Ω
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Output circuit design
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SMPS+CLASS D
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Cooling system
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Low-noise , Variable speed fans; air flow from front to the rear
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Power supply(PFC)
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AC 90~265V ~50/60Hz
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Dimensions (W×D×H)
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142mm x 332mm x89mm
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Weight
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2Kg
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2Kg
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2Kg
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2Kg
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2Kg
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2 Kg
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2 Kg
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The operational mechanism of an active speaker's amplifier board can be broken down into several key stages: the reception of audio signals, signal processing and amplification, sound wave generation, and the emission of sound.
1) Integrated High-Performance DSP Processor: The system incorporates a 48K DSP processor that boasts Finite Impulse Response (FIR) capabilities, enabling networked or serial adjustments via RS485.
2) Versatile Power Supply: It is equipped with a Power Factor Correction (PFC) type power supply that operates on AC 90~265V at 50-60Hz, ensuring compatibility with a wide range of power sources.
3) Class D Amplifier Circuit: The board utilizes a professional-grade Class D amplifier circuit, known for its efficiency and high-quality audio output.
4) Sealed and Shielded Design: The amplifier is fully enclosed in its own shielding box, which allows for direct speaker installation without the need for additional partitions.
5) Versatile Applications: It is commonly utilized in line array speakers and speaker systems that combine full-range and subwoofer elements. Examples include line array or full-range speakers with dual 8-inch, 10-inch, or 12-inch drivers, or subwoofers with 15-inch or 18-inch drivers.
6) DSP Module with Computer Control: The built-in DSP module allows for computer-controlled adjustments of the equalizer, delay, volume, and other parameters, providing precise sound tuning and management.
7) With Temperature protection, short circuit protection, DC protection
This active speaker amplifier board is designed for high-fidelity sound reproduction and is suitable for a variety of professional audio applications, offering flexibility, efficiency, and ease of use.
