Marani DPA-2448QR-T - 2 In 4 Out DSP Speaker Management System - RMS Compressor

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The DPA-2448QR-T is a DSP management system that offers high quality 24-bit digital EQ processing and matrix routing of 2 IN and 4 OUT channels. The DPA-2448QR-T provides the functionality of an external crossover and EQ for main FOH speakers.

Marani DPA-2448QR-T - 2-IN / 4-OUT Digital Speaker Management System
The DPA-2448QR-T is a DSP management system that offers high quality 24-bit digital EQ processing and matrix routing of 2 IN and 4 OUT channels. The DPA-2448QR-T provides the functionality of an external crossover and EQ for main FOH speakers. The highly versatile and configurable EQ options allow control over both the input and output channels. In-built crossover filters with slopes such as Butterworth and Bessel make it simple and setup a basic tune. The DPA-2448QR-T can connect to any computer via USB to run the software control application, allowing you to control all parameters via a computer connected via USB.

Speaker Processing - LAN and USB Controllable
With its Matrix routing capabilities, the DPA-2448QR-T is capable of being used as a Stereo 2-way or crossover for PA systems running subwoofers. Two outputs are routed to one input, and then a 7 Filter Parametric EQ is used to create the frequency slopes, notches and add high/low pass filters for the signals being sent to the sub and FOH / top speaker. Other parameters such as gain, noise gates, compression can then be applied to each output, or input as desired. The DPA-2448QR-T is easily controlled by a computer running Marina's DSP control software which can be connected via a USB or LAN connection.

Parametric EQ - Controlling Foldback Monitors
The DPA-2448QR-T can be used as a detailed EQ, say on foldback sends etc. Sometimes giving a musician a customised EQ for their foldback, is just as important as getting the levels right in their AUX send. A simple boost to the right frequencies can lift the particular musicians sound out from the mix, whilst not removing the other performers.

RMS Compressor and Peak Limiter
Using the RMS compressor can help control energy levels in a venue and maintain a more constant SPL. The Peak Limiter can be used to protect the amps and speakers from signal peaks caused by DJ's and untrained venue users.

Configurable Delay
A configurable delay is available on each channel, adjustable in 21us increments / decrements. The delay feature is useful for 'delay towers' at large concerts, or in venues where speakers are vastly separated. A finely tuned delay configuration ensures speakers are 'in phase' with each other in the desired listening spaces.


Outstanding Performance Excellent sonic performance with 24bit high end converters coupled with 48kHz sample rate
2 inputs, 4 outputs with full matrix mixing
Top-grade DSP Engine 5 band parametric equalization per input channel
7 band parametric equalization per output channel
Each band can be switched to Bell, Low/High Shelving, Low/High-Pass, All-Pass, Band-Pass and Notch
Low/High Shelving, Low/High-Pass, can be selected as 1st and 2nd order, variable Q response
Crossover filters with slopes from 6dB/Octave up to 48dB/Octave including Butterworth, Bessel, Linkwitz-Riley and customizable topologies
Each output features a precision dynamic range controller composed of a Peak Limiter and a RMS Compressor with selectable ratio and variable knee
Adjustable Delay time up to 850 ms for every input and output channel
Phase correction per output channel
Direct PC/Network Connection Front panel USB connector for direct PC communications
Ethernet interface for system setup, monitoring and control via fully manageable remote PC software
Control Front panel interactive LCD display for local access and configuration
Front panel 7-LED level meter indicators per channel
Simultaneous control up to 32 units via PC software
Up to 64 storable user presets
Security Lockout



Analog Input 2 x XLR electronically balanced
Analog Output 4 x XLR electronically balanced
Digital Input 1 SPDIF; Gain 0dBu
Minimun Load 150 ohm
THD+N 0.001% at 1kHz 0dBu
S/N >110dBA
Frequency Response 20Hz – 20kHz; -0.5dBu at 20Hz and 20kHz
AD & DA Converters 1x AK5388 24bit, 2x AK4396 24bit

DSP & Processing

DSP Engine Dream SAM3716, 24bit (data) x 96 bit (coeff.)
DSP Resolution 24×32 bit for filtering process
96 bits resolution on intermediate computation results
Parametric Equalization 5 filters per input selected as Bell or Shelving
7 filters per output selected as Bell or Shelving
Filter Type Bell, 1st /2nd Order Shelvings with -3dB at cutting Freq.
Filter Gain From -15dBu up to +15dBu by 0.5dBu resolution steps
Center Frequency Selectable with a 1/24th of octave resolution step from 20Hz up to 20kHz
Filter Q/BW Q from 0.5 up to 3 by 0.05 resolution steps
Crossover Section HPF/LPF Butterworth 6/12/18/24dB per octave
Bessel, Linkwitz-Riley 12/24dB per octave
Filter resolution 1/24th of octave
RMS Compressor and Peak Limiter Threshold from 20dBu up to -10dBu
Attack time from 5ms up to 200ms (1ms resolution up to 20ms, 10ms resolution up to
100ms and 20ms resolution up to 200ms)
Release time from 0.1 sec up to 3 sec (0.1sec resolution)
Ratio from 1:1 to 32:1 (Compressor only)
Adjustable Soft or Hard Knee (Compressor only)
Delay 848,998 ms 21us increment/decrement steps per channel


Device Presets 64 User Presets
Front Panel 2x24 character LCD display with green LED backlight
7-LED meter per input channel -20dBu to +15dBu, clip
7-LED meter per output channel -15dBu to +15dBu, clip or limiter mode
Blue LED (Edit) and 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 B connector
Rear Panel 2 x XLR female connector (Input)
4 x XLR male connector (Output)
1 x RCA connector (SPDIF input)
1 x RJ45 for Ethernet connection (10/100 TCP-IP)
2 x Ground-lift toggle switchs (MAIN and USB-TCP/IP)
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)

Software Screenshots

Input Controls
Software Delays
Parametric EQ

EQ Controls

Noise Gate
Compressor and Peak Limitor

Input and Output Matrix Router


View PDF brochure for Marani DPA-2448QR-T - 2 In 4 Out DSP Speaker Management System - RMS Compressor

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