Overview

4 x 4 Audio Management System

The 4 Series are powerful DSP based audio processors, ideally suited for install applications, where they combine the functions of a multitude of conventional products in a compact 1U unit with extensive remote control capabilities. DP444 has four inputs and eight outputs which can be configured in a selection of basic crossover modes (2 x 2 way, 1 x 4 way, 4 x 1 way). It also offer a “free assign” mode, which allows completely flexible routing of any output from any combination of inputs.

Each input has a gain control, variable delay, a 28 band graphic equaliser and a further eight bands of fully parametric equalisation. The parametric filter bands have a large selection of different filter types available, including shelving, notch, band-pass, phase and elliptical behaviours.

Each output has a gain control, variable delay, high and low pass crossover filters, nine bands of fully parametric equalisation, polarity switching and, additionally, a fully featured limiter, and a final clip limiter. The crossover filters offer slopes of up to 48dB/Octave., with a variety of responses available.

Remote control is catered for in the form of RS232 and RS485 ports, and multiple user memories are provided for the storage and recall of settings. A GPI interface may also be fitted to allow remote memory recalls using simple switch closure apparatus.

Security lock-out is available for all controls.

The 4 Series are also equipped with AES/EBU digital inputs and outputs, and include sample rate conversion, capable of accepting digital audio from 32kHz up to 192kHz.

Units can be controlled externally by XTA’s proprietary AudioCore Windows software, along with existing and future ‘AudioCore’ products.

Product Details

  • Audio Management System with 4 inputs x 4 outputs
  • Superb audio quality – carefully optimised double precision signal processing (96kHz/24 bit)
  • 117dB dynamic range
  • A flexible input/output multi-mode format caters for any configuration, regardless of scale.
  • SHARCTM based DSP platform supplies phenomenal computational power.
  • Parametric equalisation on every input and output and full spectrum graphic equaliser on each inputs.
  • Program limiter and look-ahead clip limiter on each output.
  • Delay of up to 650mS for each output, with an exceptionally fine minimum increment of 300nS (0.1mm)
  • 255 memories cells
  • Remote control via RS232 or RS485 ports, with security lockout.
  • 1 U only
Input
Inputs
4 electronically balanced
Impedance
> 10k ohms.
CMRR
>65dB 50Hz - 10kHz.
Output
Outputs
4 electronically balanced
Source Imp
< 60ohms
Min. Load
600ohm
Max. Level
+20dBm into 600 ohm
Frequency Response
+½dB 20Hz-20kHz (-3dB @ 32kHz)
Dynamic Range
>116dB 20Hz-20k unwtd
Distortion
< .02%@1kHz,+18dBm
Maximum Delay
650 mS
Min Step Size
0.3 μS
Input Gain
+6dB to -40dB in 0.1dB steps
Output Gain
+15dB to -40dB in 0.1dB steps and mute
Parametric Equalisation
Filters Parametrics
8 per Input / 9 Sections per Output
Filter Gain
+15dB to -30dB in 0.1dB steps.
Frequency Range
19.7Hz - 32kHz, 1/36 octave steps.
Filter Q / BW
0.4 to 128 / 2.5 to 0.008 (Sections switched to shelving response)
Low frequency
19.2Hz - 1kHz
High frequency
1kHz - 32kHz
Shelf gains
±15dB in 0.1dB steps.
High and Lowpass Filters
Filters
1 of each per output.
Frequency Range HPF
10Hz - 16kHz, 1/36 octave steps.
Frequency Range LPF
35Hz - 22kHz, 1/36 octave steps.
Responses
1st Order 6dB/Oct, Bessel/Butterworth/Linkwitz-Riley 12-24-48dB/Oct, Bessel/Butterworth 18dB/Oct.
Limiters
Program Limiter
Threshold
+22dBu to -10dBu
Attack time
0.3 to 90 milliseconds
Release time
2/4/8/16/32 x Attack time
“D-Max” Limiter:
Attack Time
-60uS
Release Time
Slow/Medium/Fast
General
Display
2 x 24 Character LCD
Input meter
2 x 6 point, -24dB to digital clip.
Output meter
8 x 6 point, -24dB to +4dB into limit.
Input connectors
3 pin female XLR
Output connectors
3 pin male XLR.
RS232
9 pin DEE connector
RS485
3 pin male XLR (out) 3 pin male XLR (in)
Power supply
60 to 250V ±15% @ 50/60Hz, < 30 W
Weight
3.3kg
Dimensions (H x W x D)
44 x 482 x 300mm