HDC 48

Next-Level Audio Controller with Class-Leading Sonic Performance

The HDC48 takes audio performance to the next level with new audio converters and advanced DSP algorithms that make full use of the processing power offered by the latest 4th generation SHARC DSPs.

Unique to the industry on the HDC48 are the revolutionary new LIR Linear Phase crossover filters, and for the ultimate in driver protection with maximum SPL, the new VX Limiters. These are not marketing gimmicks; they are carefully implemented, powerful tools that allow to extract the maximum performance from NOVA sound systems, safely. The HDC48 is a high performance, easy to use signal processor for loudspeaker systems, providing processing for up to 4 inputs and 8 outputs. Taking advantage of the latest advances in analogue to digital conversion and digital signal processing technologies the unit achieves performance levels higher than all previous devices. The HDC48 provides generous amounts of signal processing capability and a wide variety of crossover shapes. Three rotary encoders, illuminated buttons and graphical display provide a rapid, intuitive and userfriendly control interface.


Drive Module Concept
The powerful drive module concept allows for abstraction from device centric to speaker based control. The HDC48 uses drive module presets, which are defined as a number of outputs driven from one DSP input. This system allows for better flexibility and greater functionality when loading and storing presets. Drive modules allow for a less processor-centric and more speakerorientated system design. The HDC48 allows 50 drive module presets to be stored. Presets are stored permanently inside the HDC48 and so will always be available even if the HDC48 is not being used with the NOVA.Net software.

Unique LIR Filtering
The LIR linear phase crossover shapes give FIR-like performance without the drawbacks. The linear phase HF system EQ profiling provides perfect integration between enclosures. As well as the standard Butterworth, Bessel, Linkwitz-Riley and Hardman filters, the HDC48 offers a unique “Linear Impulse Response” (LIR) crossover filter which gives a linear phase crossover that has a constant delay regardless of frequency (unlike other types of crossover which delay different frequencies to a different extent, thus smearing the arrival time). The LIR crossover can thus be described as having a flat group delay response, and thus entirely free of group delay distortion, this is exactly the same as can be provided by common FIR filtering but without the complications and disadvantages inherent with the FIR technique. The shape of the LIR crossover filter is similar to a 4th order Linkwitz-Riley filter, and maintains zero phase difference between the adjacent bands across the crossover region to keep the polar response rock steady. As we also employ phase matching on our Bessel filters, adjacent bands are in-phase throughout the crossover region. 

FIR Shelving EQ
The input high shelf EQ is implemented using a „Finite Impulse Response“ (FIR) filter, and exhibits a linear phase response; that is all frequencies are delayed by the same amount.

High Pass Filtering
To avoid unnecessary inter-band phase shifts common in many competing products, the HDC48 provides high-pass filtering on the inputs rather than forcing you to apply ‘system’ high-pass filtering on the low crossover bands.

Extensive Limiter Suite
The innovative limiter suite which includes:
•  VX limiters: Dynamic control for passive 2-way enclosures
•  Xmax excursion limiters: Dynamic impact whilst effectively protecting drivers
•  Tmax thermal modelling limiters:Regulation limiters, addressing long term overload
•  Overshoot Limiters: Governs the amplitude of transient signals, retaining average power
     whilst constraining peaks

AES3 and Digital Network Audio
The HDC48 offers AES3 inputs and outputs switchable in pairs as standard.
The Dante audio networking card is available as option.

The NOVA.Net „System Engineer“ PC app is much more
than just a remote control panel for an HDC48. The PC
app and any connected device(s) become intimately
intertwined, faithfully duplicating any control adjustments
whether they are made in the application or on the front
panel of the device itself. Adjust a gain control on the
device, and watch the gain value in the app smoothly slide
in sympathy. Each input and each output can be
named in the application. These names not only appear for
the user  on the application control panels, but also show when scrolling through the inputs and outputs on the device itself. Even a HDC48 firmware update can be made easily via the network.

High Speed Interface
The HDC48 includes a high speed ethernet communications interface that supports DHCP, static-IP and auto-IP and direct connection to a computer without the need for a router or a switch.


Select Model


User Manuals

PDF User Manual

pdf thumb

Product Pictures

JPG Picture 1


JPG Picture 2


JPG Picture 3


>10k ohm balanced
<100R imp. balanced
+18dBu into 600R
10Hz - 40kHz
>120dBa (typ.)
>118dBa (typ.)
<0.008% (typ.)
85 - 230 V(AC) / 50 - 60Hz
30 W
4 x XLR female (NEUTRIK©)
8 x XLR male (NEUTRIK©)
RJ45 (shielded)
Phoenix (3-pin)
482 mm x 254 mm x 44 mm (1U)
2.7 kg

Input impedance
Output impedance
Max input level
Max output level
Sample rate
Frequency response
Input dynamic range
Output dynamic range
THD (20Hz–20kHz)
Mains required
Max. power consumption
Audio input connectors
Audio output connectors
AUX contact
Dimensions (WxDxH)
Weight (net)

• One click finds devices across all your network
• No manual device addressing needed
• Continuous Discovery finds new devices
• Controls can be adjusted on the device too
• Powerful Grouping with overlays for EQ, Gain and Delay
• Fast metering
• Panel positions retained between sessions
• Drag-able curves
• Copy/paste EQ curves between channels or devices
• EQ Palette
• Mute All (system mute)
• Temperature, protection and status logging
• Integration with EASERA SysTune


NOVA.Net PC Application

ZIP Software Download V7.00.17


High definition audio controlling next generation
► Four input & eight output channels
AES3 inputs & outputs selected in pairs
► Digital Network Audio
96kHz 4th generation SHARC DSP algorithms
► Powerful drive module speaker-centric presets
LIR Linear Phase crossovers
► Multi-stage peak & RMS limiters
► Virtual Xover limiter for passive systems
► PEQ & FIR equalisers on all inputs
► Easy user grouping & EQ overlays
► Extensive NOVA.Net control software over Ethernet

NOVA Preset Database for HDC48

ZIP Version V1.92