D Series

Four-Channel Digital Power Amplifier with built-in DSP

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D Series

Four-Channel Digital Power Amplifier with built-in DSP

D Series is a four-channel digital power amplifier that integrates Class D power amplification technology with high-precision DSP digital signal processing, enhancing audio performance and ease of operation. It comes with IIR filter, FIR filter, and optional Dante network functionality for precise audio tuning and optimization.

Users can configure and control the amplifier rapidly via the display and USB interface on the front panel and the Ethernet. Thanks to its exceptional performance and user-friendly software interface, the D Series amplifier is the perfect choice for professional audio systems.

Highlights

The D Series is a four-channel digital DSP power amplifier that combines Class D power amplification technology with high-precision DSP. It greatly satisfies the parameter and performance requirements of audio systems and maximizes the performance of the equipment itself. Additionally, it simplifies the tuning and management processes of audio systems, enhancing the ease of operation and efficiency.

The D Series utilizes Class D amplification technology, with an efficiency exceeding 90%, which significantly reduces energy loss during power conversion. This not only decreases heat generation but also lowers energy consumption while maintaining excellent sound quality.

The D Series is capable of stable operation in high-temperature environments up to 60°C and as low as -20°C in low-temperature conditions, with very high reliability and durability.

Remote Monitoring and Control
With the D Series amplifier, users can remotely monitor and control the status of audio equipment, adjust settings in real-time, greatly enhancing the convenience and efficiency of monitoring.

Centralized Management and Maintenance
By centrally managing the audio system over the network and carrying out software updates, parameter configurations, and maintenance tasks altogether, the efficiency of operational maintenance can be significantly enhanced.

Simplified Installation and Cost Reduction
Transmitting audio signals via the network reduces reliance on traditional audio wiring, simplifying the installation process and reducing construction costs and complexity.

High-efficiency switching power supply technology for optimized energy conversion and efficient use.
Comprehensive protection circuits ensure stable system operation and safety.
Compact size and light weight facilitate installation and deployment.
Modular design for easy maintenance and upgrades

Network Control

BrainCore NET network control system provides powerful real-time control and monitoring capabilities for complex systems, capable of managing up to 250 devices simultaneously.

Regardless of changes in DSP topology or device quantity, BrainCore NET software offers a centralized working platform, greatly simplifying the construction process of DSP design, making it easy to handle even complex DSP projects.

The system supports various network topologies and is easy to configure, allowing system designers to flexibly choose the topology that best suits the needs of each project.

It’s particularly worth mentioning that the Dante version of the D Series integrates Dante network audio transmission with software network control connections on a single RJ45 port, achieving an integrated solution that offers users greater convenience and efficiency.

BrainCore

BrainCoreTM is an innovative core application technology independently developed by Audiocenter, dedicated to delivering audio systems with supreme performance and high reliability.

Utilizing advanced technology and scientific methods, BrainCoreTM optimally analyzes and processes signals, power amplifiers, and speakers. This results in excellent frequency response and audio reproduction, even at high SPL levels.

Dante

Audinate’s Dante audio networking technology is a widely adopted networked audio solution in the world, extensively used in commercial installations, live performances, recording and production.

The D Series digital power amplifiers feature full Dante capabilities, with a channel capacity of up to 512×512, ensuring immediate and seamless compatibility with the complete Dante system.

Powerful DSP Processing
  • High-Resolution Conversion
    With a 48kHz sampling rate and 24-bit quantization precision, it achieves very low noise and extended dynamic range.
  • Advanced Digital Processing
    Equipped with the latest 32-bit floating-point digital processors, optimizing analog signal processing.
  • IIR Filters
    Offering a variety of Bessel, Butterworth, Linkwitz-Riley filters, supporting high-pass, low-pass, and parametric equalization, easily achieving -48dB/octave adjustments and phase control.
  • FIR Filters
    Enhancing the impact of audio, ensuring a more dynamic and impactful sound experience. Linear phase response retains the original transient characteristics of the audio signal, resulting in finer and more precise notes.



    DSP processors, with their 48kHz sampling rate and 24-bit quantization precision, combined with IIR and FIR filter technologies, accurately generate linear phase curves, significantly improving pulse response quality.

    This combination of technologies meets the needs of an ideal crossover, allowing sound engineers to accurately reproduce the perfect sound quality of speakers on-site, providing users with balanced, natural, transparent, and authentic auditory experiences.

  • Perfect Integration of BrainCoreTM Technology Perfectly integrating BrainCoreTM technology, providing precise digital processing through superior Limita™ processing technology, ensuring the system operates safely and reliably.
  • AES Digital Audio Input
    Supporting standard AES/EBU digital audio input, we offer customers a variety of widely recognized digital audio input solutions in the industry for high-quality audio transmission and precise control of audio equipment.
  • Dante Network Audio Transmission and Control
    Integrating Dante network audio transmission and control technology, allowing for long-distance, high-precision audio signal transmission and control over Ethernet, ensuring stable and reliable sound quality.
  • Supports dual signals and hot backup, with seamless switching
    Capable of handling both Dante digital and analog signals, it features automatic hot backup to ensure immediate and seamless switching in case of primary audio source failure, maintaining stable transmission. Users can easily manage backups, ensuring audio reliability.
  • High-Efficiency Class D Power Amplifier
    The D Series utilizes Class D amplification technology, with an efficiency exceeding 90%, which significantly reduces energy loss during power conversion. This not only decreases heat generation but also lowers energy consumption while maintaining excellent sound quality.
  • European R&D design, German standard engineering
    The power amplifier module and DSP module were designed by Audiocenter’s R&D team in Europe and manufactured according to German standard engineering. The system operates stably and efficiently, ensuring high-quality audio output.
  • Comprehensive Protection Circuits
    The D Series is equipped with comprehensive protection circuits, including limiter protection, soft start protection, DC protection, short circuit protection, and thermal protection, which can better protect the power amplifier, ensuring stable sound quality and speaker longevity.
  • High Reliability
    Amplifier modules and DSP modules have been sold globally for over 500,000 units and have been proved to be very stable and reliable.
  • High Standards
    All input and output connectors are professional-grade quality components.
    High-quality components ensure the amplifier operates stably in harsh environments.


The 2-inch TFT display on the front panel of the D Series provides a user-friendly control interface. It offers quick system settings, network settings, monitoring, and built-in preset memory functions, allowing for switching to different modes anytime, anywhere.

Menu settings include volume, sensitivity, presets, PEQ, delay, signal source, TFT display brightness, auto-lock and IP settings.

Engineers in AUDIOCENTER, with their in-depth expertise and years of research, have integrated advanced DSP processors into the D Series amplifiers. This DSP digital power amplifier provides exceptional sound quality beyond traditional analog signal processing technology, bringing you an unprecedented audio experience.

The DSP processor is easy to set up, adjust, load, and recall, allowing users to easily load or recall their customized programs or use speaker presets offered by the factory.

  • Comprehensive EQ and Filter Options
    Each channel is equipped with 15-band input EQ and 10-band output EQ, with a variety of EQ filter types to choose from.
    There are options of Butterworth, Bessel, Linkwitz and 6 ~ 48 dB/Oct for the high and low-pass crossovers.

  • Professional FIR Filters
    The D Series supports the import of third-party software and captures data through SMARRT testing, allowing users to edit personalized settings directly within the software and save them for use.

    It supports up to 4×2048 Taps, ensuring the precision of audio processing.

  • Limiter Management
    The superior Limita™ processing technology offers precise digital processing, ensuring that the system can operate safely and reliably.

  • Preset Management
    The D Series amplifier offers two preset management modes: channel preset management and system preset management.

    Users can easily call up the corresponding presets with one click to achieve satisfactory audio quality. This simplifies operations and enhances efficiency, allowing field application engineers to complete their tasks easily and efficiently.

 

 

D4.2K

D4.2K-D

D4.4K

D4.4K-D

Output power(1kHz, 20ms burst THD+N = 1%)

8Ω Stereo

4x300W

4x300W

4x600W

4x600W

4Ω Stereo

4x500W

4x500W

4x1000W

4x1000W

8Ω Bridge

2x1000W

2x1000W

2x2000W

2x2000W

Protection System

DC Protection,Short circuit protection,Smart overheat management,Overheat protection, Output overload protection,Soft startup protection,Limiter protection

DSP processing

Sampling rate

48kHz/24bit

48kHz/24bit

48kHz/24bit

48kHz/24bit

Input

1) Input: 4x analogue, 4x AES ,4x Dante (D4.2K-D,D4.4K-D)

2) Noise Gate,gain,Sensitivity,Phase,Mute

3) Input EQ:15 band EQ + HPF/LPF(Butterworth, Linkwitz-Riley, Bessel:6 dB/oct to 48 dB/oct)

4) Input delay:Per channel 90ms

Working mode

Matrix,Stereo,Parallel,Bridge

Matrix,Stereo,Parallel,Bridge

Matrix,Stereo,Parallel,Bridge

Matrix,Stereo,Parallel,Bridge

FIR

4 channel FIR 4×2048 Taps

4 channel FIR 4×2048 Taps

4 channel FIR 4×2048 Taps

4 channel FIR 4×2048 Taps

Output

1) Output EQ:10 band EQ + HPF/LPF(Butterworth, Linkwitz-Riley, Bessel:6 dB/oct to 48 dB/oct)

2) Output delay:Per channel 20ms

3) compressor and limiter

4) Gain, Phase, Mute

Analogue Input

AES Input

Dante Input

4x analogue

4x AES

/

4x analogue

4x AES

4x Dante

4x analogue

4x AES

/

4x analogue

4x AES

4x Dante

USB control port

USB-B

USB-B

USB-B

USB-B

TCP/IP network control port

RJ45 x2

RJ45 x2

RJ45 x2

RJ45 x2

Input Connectors

Male XLR & Female XLR

Male XLR & Female XLR

Male XLR & Female XLR

Male XLR & Female XLR

Output Connectors

Speakon

Speakon

Speakon

Speakon

Input Impedance

≥20kΩ(Balanced);≥10kΩ(Unbalanced)

≥20kΩ(Balanced);≥10kΩ(Unbalanced)

≥20kΩ(Balanced);≥10kΩ(Unbalanced)

≥20kΩ(Balanced);≥10kΩ(Unbalanced)

Maximum input voltage

≥18dBu

≥18dBu

≥18dBu

≥18dBu

Sensitivity

0dBu/6dBu/12dBu

0dBu/6dBu/12dBu

0dBu/6dBu/12dBu

0dBu/6dBu/12dBu

Frequency response(1W 8Ω stereo)

20Hz-20kHz(±1dB)

20Hz-20kHz(±1dB)

20Hz-20kHz(±1dB)

20Hz-20kHz(±1dB)

Crosstalk(1kHz,Rated power 8Ω A weighted)

≥60dB

≥60dB

≥60dB

≥60dB

S/N Ratio(Rated power 8Ω, A weighted)

≥100dB

≥100dB

≥100dB

≥100dB

Damping Factor(1kHz & 8Ω)

≥400

≥400

≥400

≥400

Intermodulation Distortion(60Hz:7kHz=4:1，half power)

≤0.1%

≤0.1%

≤0.1%

≤0.1%

THD+N(1kHz，8Ω half power  A weighted)

≤0.1%

≤0.1%

≤0.1%

≤0.1%

Output circuitry

Class D

Class D

Class D

Class D

Power Supply

100-130V~/220-240V~(±10%,50/60Hz)

100-130V~/220-240V~(±10%,50/60Hz)

100-130V~/220-240V~(±10%,50/60Hz)

100-130V~/220-240V~(±10%,50/60Hz)

Power consumption(1/8 output power 4Ω)

375W

375W

750W

750W

Rack space

2U

2U

2U

2U

Cooling

Front to back venting,mandatory cooling

Front to back venting,mandatory cooling

Front to back venting,mandatory cooling

Front to back venting,mandatory cooling

Dimension(W×H×D)

483×88×404mm

483×88×404mm

483×88×404mm

483×88×404mm

Net Weight

8.5kg

8.5kg

10.0kg

10.0kg

Application Scenarios

Why Choose Us

Integration Of Global R&D Technical Resources

1. Strong R&D team with 11 top electroacoustic engineers and audio engineers from Germany, Sweden, Denmark, Italy, Spain and America.

2. More than 30 R&D engineers in Audiocenter HQ.

3. Develop close cooperation with audio R&D institutions such as Humboldt–Universitat zu Berlin, Universitat Politecnica de Valencia, the Chinese Academy of Sciences.

Technical Innovation Qualification & Product Certifications

Integration of Application Technology Resources

1. International marketing and technical support team with local experienced professionals to achieve barrier-free communication with global users. Senior technical support engineers are located all over the world.

2. Technical service center including a solution design team, application engineers and system engineers to provide technical services to customers around the world.

3. Full technical services, including pre-sales technical support, system design, installation and commissioning, after-sales service, technical training, etc.

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