2-Channel FIR Amplifier Module

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PDA500PF is a complete solution dedicated to 1-way or 2-way self-powered loudspeakers. Designed to meet different applications, it provides 2 channels with output power of 2x500W@4 Ohm or 2x250W@8 Ohm. In addition it offers a full set of added value features such as on board DSP and RS485 connection for monitoring and control via dedicated PC software. To guarantee maximum reliability, the PDA500PF includes a highly efficient universal switch mode power supply with PFC (Power Factor Correction) which provides a total 1kW power to the 2 output channels. The 2 output stages use the well-known Class D module. The PDA500PF includes a set of sophisticated processes for loudspeaker, implemented by the powerful MARANI DSP running 48kHz/24bit [96 bits precision for the internal intermediate processes] and high performance 24bit AD/DA Converters. Processes as Noise Gate, up to 512 taps FIR filters OR up to 48dB/Oct IIR Hp/Lp filters for X-over, parametric EQs per input and output sections, RMS compressor, alignment delay and All-Pass filters are available, all in all everything needed to optimize a self-powered loudspeaker. Moreover the Clip/Limiter function per channel provides output monitoring to prevent speaker damage with gentle gain reduction at clip threshold, in addition to the efficient heat dissipation system and Over-Heat protection which themselves ensure a reliability without compromises. Furthermore the PDA500PF is also equipped with a Dynamic Loudness function and an useful Pink/White noise generator. All setup parameters for input mixing, DSP features and the limiter setting are accessible by using the remote PC software.

A Powerful 512taps FIR is available for the System Phase Correction, based on System Response measurement.

Contact details

Marani Proaudio Srl

Via Vittorio Veneto N. 11
42022 Boretto RE


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Range of services

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Outstanding Performance

High power output: 2 x 500W @ 4Ω or 2 x 250W @ 8Ω

Switched-Mode Power Supply with PFC and auto voltage sensing

Class D Amp Module - full bandwidth PWM modulator with ultra low distortion

Full protection circuitry including Over-Current, Over/Under-Voltage, Output DC and Over-Temperature

Excellent sonic performance with 24bit high end converters coupled with 48kHz sample rate

Top-grade DSP Engine

10 band parametric equalization per input channel

8 band parametric equalization per output channels

FIR OR IIR Filters for X-OVER:

The X-Over can be implemented both by FIR filters OR IIR Hp/Lp, as desired by the user which can select the FIR or IIR use by Sw.

FIR: Crossover filters can be created by the user selecting from 256 up to 512 taps, the FIR type and the Out Band attenuation or importing from external application the FIR coefficients as '.txt' file.

IIR: Crossover filters with slopes from 6dB/Octave up to 48dB/ Octave including Butterworth, Bessel and Linkwitz-Riley

Each output features a precision RMS Limiter with selectable Attack/Release time and Threshold.

On the Low Output, a Bell type Dynamic Filter for Driver protection is available.

Adjustable Delay time up to 161 ms for input and 81ms for output channels

Input channel includes a Noise Gate function, Pink/White noise generator, sophisticated Dynamic Loudness function and a High-Pass filter with slopes from 6dB/Octave up to -48dB/Octave including Butterworth, Bessel, Linkwitz-Riley and a RMS Compressor.

Direct PC/Network Connection and Control

Rs485 connection for system setup, monitoring and control via fully manageable remote PC software

Simultaneous control up to 32 units via PC software

8 Preset Selection by using rotary encoder switch

Security Lockout

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