LPP440A is a High End 4-IN/4-OUT digital speaker management system which maintains the same outstanding Sound Quality of the former DPA440A version, but highly improved in terms of DSP processes and added of an astonishing FIR filtering tool set. Designed for maximum versatility, it provides all the processing and control necessary for both live and fixed installation use. Proving for any crossover configuration, it offers 4 analog inputs, 4 analog outputs and 2 AES/EBU inputs, managed by 2 powerful MARANI® DSP Engines, for a full 96kHz processing, in addition to 24 Bit AD/DA Converters. Each input channel provides a choice of a 13-band Parametric EQ, Gain control, Noise Gate, RMS Compressor, Internal White/Pink Noise Generator, and configurable Delay. Each output offers up to 7-band of parametric equalization, in addition to the IIR crossover filters which themselves provide slopes from 6dB/Octave up to 48dB/Octave. Each output path also features PEAK Limiter, RMS Compressor and configurable Delay. Particularly, the Output X-Over Filtering can be selected to be IIR style, with the complete set of Classic Hp/Lp filters (Butterworth, Linkwitz-Railey, Bessel) or FIR, being for each output channel available a 512 taps FIR filter which can be set as Hp/Lp/Bp. On each one of the 4 Input paths, one more 1024 taps Asymmetrical FIR is available for Phase Correction purposes, where the Coefficients Calculation can be supported by an embedded Wizard tool or can be Loaded from external sources as Third Parties Sw for the FIR filters coefficients generation. Being the phase correction FIR Asymmetrical, a powerful tool for adjusting/reducing the FIR latency is available, allowing therefore the LPP440A to be used without any problem also for Live performances still having the Phase correction FIR running together with the eventual FIR for the X-Over implementation in cascade.
The LPP440A supports a full set of matrix mixing modes where Input sources can be routed to the Input paths, inputs paths may be routed/mixed in any ratio to any output and outputs routed/mixed in any ratio to the 4 physical outputs at pleasure. For remote configuration and control the LPP440A can be connected via USB/RS485/TCP-IP connections. The control remote PC software allows simultaneous control up to 32 units, setting all parameters and showing real time levels.

Top-grade DSP Engine and Processes

13 band parametric equalization per input channel 7 band parametric equalization per output channel Each band can be switched to Bell, Shelving, HP/LP, Band Pass, Notch Filter, All Pass IIR Crossover filters with slopes from 6 up to 48 dB/ Octave including Butterworth, Bessel, Linkwitz-Riley FIR X-over Filters with number of Taps from 256 up to 512, Attenuation and Window Type Asymmetrical 1024 Taps FIR for Phase Correction on each of the 4 Input paths [FIR coefficients generated internally by the machine or loadable from external third parties applications] RMS compressors working on Look Up tables for the Compression coefficient are available on Input and Outputs paths. On Outputs a further Peak Limiter is available at the end of the paths. Adjustable Delay time up to 480 ms for every input channel and 340 ms for each output channel

Direct PC/Network Connection

Front panel USB connector for direct PC communications RS485/TCP-IP connection for system setup, monitoring and control via fully manageable remote PC software Simultaneous control up to 32 units via PC software

Audio

Analog Input	4 x XLR electronically balanced
Analog Output	4 x XLR electronically balanced
Digital Input	2 x AES/EBU; Gain 0dBu
Minimum Load	150 ohm
THD+N	≤0.005 %@1kHz +20dBu ≤0.004 %@1kHz 0dBu
S/N	>112dB（A weight）
Max Input Level	+20 dBu
Max Output Level	+20 dBu
Frequency Response	20Hz – 20kHz; -0.5dB at 20Hz and 20kHz
AD & DA Converters	24bit -96kHz

DSP & Processing

DSP Engine	2 x MARANI® DSP
DSP Resolution	24 bit (data) x 96 bit (coeff.), 54bit accumulation registers,  96 bit precision on intermediate processing data
FIR for Phase Correction	Asymmetrical 1024 Taps, with coefficients generated by Pc Sw embedded Wizard tool, allowing also FIR latency Adjustment/reduction. Coefficients can also be imported by external third party applications, so as can be exported to third parties applications
Parametric Equalization	13 PEQ filters per input  7 PEQ filters per output
Filter Type	Bell, Shelving, HP/LP, Band Pass, Notch Filter and All Pass
Filter Gain	From -15dB up to +15dB by 0.5dB resolution steps
Input&Output Gain	From -18dB up to +12dB by 0.5dB resolution steps
Center Frequency	from 20Hz up to 20kHz with 1Hz resolution steps
Filter Q/BW	Bell Type: Q from 0.4 up to 128 in 100 steps Shelv/Hp/LP Type: Q from 0.1 up to 5.1 in 100 steps BandPass/Notch Type: Q from 4 up to 104 in 100 steps
IIR Crossover section HP/LP	Butterworth 6/12/18/24dB per octave Bessel 12/24dB per octave Linkwitz-Riley 12/24/36/48 dB per octave
FIR X-Over Section Hp/Lp/Bp	Hp/Lp/Bp filters, Taps from 256 up to 512, Attenuation up to -120dB, Window type as Rect / Sinc / Keiser / Hanning / Hamming / Blackman / Nuttal / Sine
Internal Noise Generator	White/Pink Noise; Level from -40dBu to 0dBu
Input Noise Gate	Threshold from -80dBu up to -50dBu Attack time from 1ms up to 1000ms; Release time from 10ms up to 1000ms
Input&Output RMS Compressor	Threshold from 20dBu up to -10dBu Ratio: 2:1~32:1; Knee: 0~100%; Makeup from -12dBu to +12dBu Attack time from 0.1ms up to 5000ms; Release time from 0.001sec up to 10sec
Output Peak Limiter	Threshold from 20dBu to -10dBu Attack time from 0.1ms up to 900ms; Release time from 0.04sec up to 6sec
Routing	Full matrix mixing mode
Delay	480 ms 10.4us increment/decrement steps per input, 340ms 20.8us increment/decrement steps per output
Ground Noise	-90 dBu

General

Device Presets	up to 16 User Presets
Front Panel	2 x 24 character LCD display with green LED back light 7-LED meter per input channel -15dBu to +15dBu, clip and limiter mode 7-LED meter per output channel -15dBu to +15dBu, clip and limiter mode Blue LED (Edit) per channel Red LED (Mute) per channel NAV/PM1 Rotary encoder push button switch PM2, PM3, ENTER, ESC, UTILITY push button switches EDIT/MUTE push button per channel USB type A connector
Rear Panel	(2+2) x XLR female connectors (4 x Analog Input or 2 x AES/EBU) 4 x XLR male connectors (Output) 1 x RJ45 connector for RS485 (Input) 1 x RJ45 connector for RS485 (Output) 1 x RJ45 connector for TCP-IP 1 x Ground-lift toggle switch 1 x Analog/Digital toggle switch IEC C13 16A connector; Power on/off switch
Main AC	90-240VAC (50/60Hz) – 40W
Dimensions	19”x 1.75”x 9” (483x44x229mm) 1RU
Weight, Net / Shipping	7.71 lbs (3.5 Kg) / 8.82 lb (4 Kg)