Class D Digital Amplifier

Digital amplifier 1.SMPS+TCPIT +DSP Control 3.Low Residual Noise,Low Distortion 4.light-weight 5.High efficiency

Class D Amplifier Based on Powerful DSP Process System

The MDA525B is a powerful Class D Module composed by two Modules, the SMPS and a two channel Class D Power Amplifier, specifically designed for Two Way Active Loudspeakers .

The Class D Amplifier 's SMPS Module

This module is designed to deliver all the voltages and power to the Amplifier Module and to the Digital Signal Processor board. It has high dynamic Power handling capability with high efficiency and low noise .

Class D Amplifier Features

*Built in Active Power Factor Corrector (PFC)*Built in Line Noise Filter*Automatic 110/220Vac Line Voltage sensing; No need of manual Setting*High efficiency; >88% @full load*Over Temperature Protection

The Amplifier Module

The class D power Amplifier Module features a self-oscillating type PWM modulatorfor the lowest component count, highest performance and robust design.

Class D Amplifier Features

*Self-Oscillating PWM topology; 400kHz*Low Residual Noise*Low Distortion*Efficiency: 90 % @ Full load*Electronically Balanced analog input*ON / Shut-Down remote control; Optically Isolated

Class D Amplifier Specifications

250W section:Output Power: 250W 4Ω; 125W 8Ω500W section:Output Power: Full Bridge: 500W 4Ω; 310W 8Ω

Class D Amplifier Sw Features

The Class D aMplifiers MDA525B are powered by a DSP board allowing to perfomr the following processes

1. Input Gain +-12dB2. Hp/Lp X-Over up to 24dB/Oct3. Parametric 8 Filters Eq on each Channel (Peaker and Shelving filters) +-15dBu Gai4. RMS Compressor on each channel with THR up to -24dB, Ratio 2:1 – 100:1, Attack Time from 5ms up to 200ms andRelease Time from 0.1Sec up to 5Se5. Output Level up to -90dB6. Peak Lmiter under Password on each ch., with THR from 2.185Vp up to 0.137Vp, Attack Time from 1ms up tpo 100ms andRelease Time from 25ms up to 250ms7. Dynamic Loudness Filters8. Main Powered Outputs Mute9. Delay up to 848.998ms on each channel by 22us steps10. Pink noise Generator

The all functions can be controlled and monitored through a powerful Pc sw control and a RS485 connectionUo to 8 Presets can be created by Pc Sw and loaded on the Unit, so to recall them by a “local” 8 positions Encoder.

DSP Board Technical DataThe Class D aMplifiers MDA525B are powered by a DSP board allowing to perfomr the following processes1. Input Gain +-12dB2. Hp/Lp X-Over up to 24dB/Oct3. Parametric 8 Filters Eq on each Channel (Peaker and Shelving filters) +-15dBu Gai4. RMS Compressor on each channel with THR up to -24dB, Ratio 2:1 – 100:1, Attack Time from 5ms up to 200ms andRelease Time from 0.1Sec up to 5Se5. Output Level up to -90dB6. Peak Lmiter under Password on each ch., with THR from 2.185Vp up to 0.137Vp, Attack Time from 1ms up tpo 100ms andRelease Time from 25ms up to 250ms7. Dynamic Loudness Filters8. Main Powered Outputs Mute9. Delay up to 848.998ms on each channel by 22us steps10. Pink noise Generator

The all functions can be controlled and monitored through a powerful Pc sw control and a RS485 connectionUo to 8 Presets can be created by Pc Sw and loaded on the Unit, so to recall them by a “local” 8 positions Encoder.

Analog Inputs +12dB, Electronically BalancedDigital Processing (DSP) SAM3716, 24 bits, used in 4 times precision so to get 96bit precision in intermediateprocesses' results

A/D – D/A Converter CS4272 24 bits

Sampling Rate 48kHzS/N 107dB

Sw Features

The Class D aMplifiers MDA525B are powered by a DSP board allowing to perfomr the following processes

2. Hp/Lp X-Over up to 24dB/Oct3. Parametric 8 Filters Eq on each Channel (Peaker and Shelving filters) +-15dBu Gai4. RMS Compressor on each channel with THR up to -24dB, Ratio 2:1 – 100:1, Attack Time from 5ms up to 200ms andRelease Time from 0.1Sec up to 5Se5. Output Level up to -90dB6. Peak Lmiter under Password on each ch., with THR from 2.185Vp up to 0.137Vp, Attack Time from 1ms up tpo 100ms andRelease Time from 25ms up to 250ms7. Dynamic Loudness Filters8. Main Powered Outputs Mute9. Delay up to 848.998ms on each channel by 22us steps10. Pink noise Generator

The all functions can be controlled and monitored through a powerful Pc sw control and a RS485 connectionUo to 8 Presets can be created by Pc Sw and loaded on the Unit, so to recall them by a “local” 8 positions Encoder

DSP Board Technical Data

Analog Inputs :     +12dB, Electronically Balanced

Digital Processing :      (DSP) SAM3716, 24 bits, used in 4 times precision so to get 96bit precision in intermediate processes' results

A/D – D/A Converter:    CS4272 24 bits

Sampling Rate:  48kHz

S/N :   107dB

Class D Amplifier with DSP Process's Remote Control

Class D Digital Amplifier