PDA281PAF is a complete solution dedicated to 2-way self-powered loudspeakers. In addition, it offers a full set of value adding features such as on board DSP, Wifi Connection, and optional extension of Dante™, Ethernet and Bluetooth with aptX™. To guarantee maximum reliability, the PDA281PAF includes a highly efficient switch mode power supply with PFC (Power Factor Correction) which provides power of 280W+100W @ 4ohm to the 2 output channels, using the Class D module - full bandwith PWM modulator obtaining ultra low distortion, high dynamic range and also equipped with a full set of circuit protections.

The PDA281PAF 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]. Processes as Noise Gate, crossover filters, 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. FIR coefficients generated from the Third Party Applications can be imported as .txt file. Moreover the Peak 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. 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 uncompromised reliability. 12dB ADC Headroom is available. All setup parameters for input mixing, DSP features and the limiter setting are accessible by using the remote PC software. To make it a more flexible device for audio applications, PDA281PAF guests a WIFI module, allowing user connect the unit to PC via WIFI. 

Outstanding Performance	Excellent sonic performance with 24bit high end converters coupled with 48kHz sample rate High power output: 280W + 100W @ 4ohms Switched-Mode Power Supply with auto voltage sensing Class D Amp Module - full bandwith PWM modulator with ultra low distortion Full  protection  circuitry  including  Over-Current, Over/Under-Voltage,  Output  DC  and  Over-Temperature Supports Dante™, Bluetooth with aptX™, Ethernet up to user’s preference
Top-grade DSP Engine	10 band PEQ on input channel, selected as Lo/Hi-Shelving, Bell and Notch filter 8 band PEQ on output channel, selected as Lo/Hi-Shelving, Bell and Notch filter 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.          FIR coefficients can be imported as .txt or .csv file from external applications IIR: HP/LP filters with slopes from 6dB/Octave up to 24dB/ Octave including Butterworth, Bessel, Linkwitz-Riley and customizable topologies Input channel includes FIR Phase Correction, Noise Gate, RMS compressors, while output channels includes Peak Limiter Each output features a precision Peak Limiter with selectable Attack/Release time and Threshold. Adjustable Delay time up to 250.998 ms for input and 40.998 ms for output Dynamic Filter and +12dB ADC Headroom are available
Direct PC/Network Connection&Control	USB connector for system setup, monitoring and control via fully manageable remote PC software (EHTERNET is optional as well) Remote PC SW control can be also realized by WIFI connection（optional） 3 Preset Selection

Power & Amplifier section

Number of Channels	2
Max Output Power	280W + 100W @4ohms
Output Circuitry	Class D - full bandwith PWM modulator with ultra low distortion
THD+N	<0.003%
Signal To Noise Ratio	>105 dB (A-weighted, 20 Hz - 20 kHz, 8Ω load)
Frequency Response	20Hz ~ 20kHz; -0.5dBu at 20Hz and 20kHz
Power Supplies	Switch mode power supply with PFC (Power Factor Correction)
Operating Range	Universal Mains, AC 110-240V
Protections	Over-Current, Over/Under Voltage, Output DC and Over-Temperature, Short Circuit Protection
Analog Input	1 x XLR electronically balanced,
Analog Output	1 x XLR electronically balanced,
AD & DA Converters	24bit
Frequency Response (DSP)	20 Hz - 20 KHz; -0.5dBu at 20 Hz and 20 kHz

DSP & Processing

DSP Engine	MARANI® DSP
DSP Resolution	24bit (data) x 24 bit (coeff.),54bit accumulation registers,  96 bit precision on intermediate processing data
Parametric Equalization	12 filters on each input channel 8 filters on each output channel
Filter Type	Bell, Low/High Shelving Variable Q, Notch Filter
Filter Gain	From -15dBu up to +15dBu by 0.5dBu resolution steps
Center Frequency	Selectable with 1Hz resolution step from 20Hz up to 20kHz
Filter Q/BW	Bell Type: Q from 0.4 up to 128 Lo/Hi Shelving: Q from 0.1 up to 5.1 Notch Filter: Q from 4 up to 104
Crossover Section FIR	Type: bypass, HP, LP, BP, and custom Freq. from 250 to 20kHz Taps up to 512, Attenuation up to 120dB Window type: Rect/Kaiser/Sinc/Hamming/ Hanning/Blackman/Nuttal/Kaiser-Bessel/Sine
Crossover Section IIR	HP/LP filter with slope up to -24dB/octave Type Butterworth, Bessel, Linkwitz Riley
Input RMS Compressor	Threshold from -30 to 0dBu Ratio: 2:1 ~ 32:1; Soft Knee: 0~100% Release from 100  to 15000 ms; Attack time from 0.1 to 2000 ms Make up from -12 to +12dB
Output Peak Limiter	Threshold from -30dB up to +0dB Release time from 0.1ms up to 5000 ms Attack time from 1ms up to 1000 ms
Delay	300.998ms for input channel and 40.998ms for output channel

General

User Preset	3
Front Panel	PRESET button Green LED (Signal); Red LED (Clip, Power); Blue LED (Limit); Yellow-Green(Preset 1/2/3) 1 x XLR female connector (Input) 1 x XLR male connector (Link Output) 1 x RJ45 (for TCP/IP or for Dante™, optional) 1 x Ground-lift toggle Switch 2 x Locking PowerCON® 20A: AC Mains (blue) - AC Link (white) On/Off Power Switch
Dimensions	132mmX355mmX65mm
Weight, Net / Shipping	6.09 lbs (2.76 Kg) / 8.83 lb (4 Kg)