The DX4.0 is an advanced loudspeaker controller and system matrix with four input and eight output channels.
Class-leading sonic performance is achieved by state-of-the-art audio converters and DSP algorithms, with a 96kHz sampling frequency delivering a nominally flat response beyond 40kHz.
Connected via Ethernet, system remote control and monitoring is done via Martin Audio’s VU-NET proprietary software application, while a front panel interface gives local control of features.
Four analogue/AES3 inputs and eight analogue/AES outputs are available, with AES3 inputs and outputs selected in pairs. Dante™ digital audio networking is also provided for digital audio distribution and control, with automatic fall back to analogue or AES3. By converting analogue or AES audio to Dante, the DX4.0 provides ‘on-ramp’ entry to digital audio networking.
The DX4.0 features a sophisticated loudspeaker limiter suite which incorporates peak, RMS and excursion limiting, as well as multiband limiting for passive two-way systems. High-pass filtering, three shelving filters and six parametric filters are provided for each input channel, with crossover filters, two shelving filters and eight parametric filters on each output channel.
The DX4.0 supports FIR filters for use with optimisation of Martin Audio’s O-Line and can also be used with Martin Audio’s U-Hub to feed digital audio and network to an MLA Series array/subwoofer array via a single cable.
INPUTS 2 electronically balanced IMPEDANCE >10k ohms analogue CMMR >65dB 50Hz – 10kHz OUTPUTS 6 electronically balanced SOURCE IMP <60 ohms analogue MIN LOAD 600 ohms analogue MAX LEVEL 20dBm into 600 ohm FREQUENCY RESPONSE 20Hz-20kHz ± 0.5dB, -3dB @ 32kHz DYNAMIC RANGE >116dB 20Hz-20kHz unweighted DISTORTION <0.02% @ 1kHz, 18dBm MAXIMUM DELAY 650ms (Increment 0.3µs) INPUT GAIN 6dB to -40dB in 0.1dB steps OUTPUT GAIN 15dB to -40dB in 0.1dB steps plus mute
FILTERS 8 per input / 9 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
1ST ORDER 6dB/Oct BESSEL/BUTTERWORTH/ 12, 24 and 48dB/Oct LINKWITZ-RILEY BESSEL/BUTTERWORTH 18dB/Oct
THRESHOLD 22dBu to -10dBu ATTACK TIME 0.3ms to 90ms RELEASE TIME 2/4/8/16/32 x Attack time DISPLAY 2 x 24 character blue LCD INPUT METER 2 x 4 point, -24dB to digital clip OUTPUT METER 6 x 4 point, -24dB to 4dB into limit
INPUTS 3 pin female XLR OUTPUTS 3 pin male XLR EXTERNAL 9 pin D-type connector (RS232) POWER 3 pin IEC POWER 60V to 250V ±15% @ 50/60Hz CONSUMPTION <30 watts LATENCY 1.5ms (analogue in – analogue out @ 96Hz) DIMENSIONS (W) 482mm x (H) 44mm x (D) 300mm
(W) 19ins x (H) 1.75ins (1U) x (D) 11.8ins WEIGHT 3.3kg (7.3lbs)