DP948 4-Input 8-Output Professional DSP Loudspeaker Management Processor with FIR and Network Control
Product Overview
The Haozhiseng Audio DP948 is a professional 4-input, 8-output digital loudspeaker management processor designed for touring sound systems, live performances, clubs, theatres, houses of worship, conference systems, rental companies, and fixed audio installations.
Built around a high-precision floating-point audio DSP platform, the DP948 supports 96 kHz sampling, 32-bit A/D and D/A conversion, and advanced FIR processing. It provides comprehensive system functions including parametric EQ, dynamic EQ, crossover, delay, compressor, limiter, noise gate, polarity, gain, signal routing, matrix mixing, and signal generation.
USB, RS-485, and TCP/IP connectivity allow convenient local or network-based control. With flexible 4 × 8 matrix routing and extensive input and output processing, the DP948 is suitable for full-range systems, subwoofer management, delay towers, multi-zone systems, and complex professional sound installations.
Key Features
- 4 balanced XLR input channels
- 8 balanced XLR output channels
- High-precision floating-point professional audio DSP
- 96 kHz sampling rate
- 32-bit A/D and D/A conversion
- FIR filter support up to 1,024 taps
- 12-band parametric EQ on each input channel
- 15-band parametric EQ on each output channel
- Two-band dynamic EQ on every input and output
- Linkwitz-Riley, Bessel, and Butterworth crossover filters
- Up to 1,000 ms input and output delay
- Flexible 4-input × 8-output matrix routing
- Noise gate, compressor and limiter processing
- White noise, pink noise, sine-wave and sweep signal generator
- USB 2.0, USB 3.0, RS-485 and TCP/IP control
- RS-485 control for up to 250 connected devices
- Optional UTWR1 and TCP/IP remote network control
- Approximately 1.5 ms input-to-output latency
- Storage for up to 60 user presets
- Password protection for individual function modules
- Front-panel control with LCD display and rotary encoder
- Universal AC 90–240 V power supply
Input Processing
Each input channel provides independent professional signal processing:
- Input mute
- Input gain
- Input polarity
- Noise gate
- Delay
- 12-band parametric EQ
- Two-band dynamic EQ
- Compressor
- Automatic gain control
- Signal generator
- Input matrix routing
Input EQ filter types include:
- Parametric EQ
- Low-shelf filter
- High-shelf filter
- First-order all-pass filter
- Second-order all-pass filter
Output Processing
Each output channel provides:
- Output mute
- Flexible input source selection
- Output gain
- Output polarity
- Delay
- High-pass and low-pass crossover filters
- 15-band parametric EQ
- Two-band dynamic EQ
- Compressor
- Limiter
- FIR phase-correction filtering
- Independent routing and function bypass
Crossover and Equalization
The DP948 supports Linkwitz-Riley, Bessel, and Butterworth crossover filters for accurate loudspeaker system alignment.
- Adjustable frequency range: 19.7 Hz–20 kHz
- EQ gain range: −20 to +20 dB
- Gain adjustment resolution: 0.1 dB
- Bandwidth range: 0.05–3 octaves
- Crossover slopes up to 48 dB/octave
- Selectable PEQ, low-shelf, high-shelf and all-pass filters
Delay and Dynamics Control
- Maximum delay: 1,000 ms per channel
- Fine delay adjustment: 10 μs
- Coarse delay adjustment: 1 ms
- Compressor with adjustable threshold, ratio, attack and release
- Limiter with adjustable threshold, attack and release
- Independent two-band dynamic EQ for each input and output
- Noise gate with adjustable threshold
Network and Software Control
The DP948 can be controlled directly from its front panel or through compatible PC control software.
Available control interfaces include:
- Front-panel USB connection
- Rear-panel RS-485 terminal
- TCP/IP connection via RJ45
- USB 2.0 and USB 3.0 support
- Optional UTWR1 wireless/network control
- Remote control over a local network or the Internet
- RS-485 control for systems containing up to 250 devices
The software interface provides graphical control of EQ, crossover, delay, compressor, limiter, routing, dynamic EQ, FIR and other system functions.
Technical Specifications
| Item | Specification |
|---|---|
| Model | DP948 |
| Product Type | Professional DSP Loudspeaker Management Processor |
| Input Channels | 4 |
| Input Connectors | 4 × balanced XLR female |
| Output Channels | 8 |
| Output Connectors | 8 × balanced XLR male |
| Input Impedance | 13 kΩ |
| Output Impedance | 500 Ω |
| Maximum Input Level | +20.3 dBu |
| Frequency Response | 20 Hz–20 kHz, ±0.4 dB |
| Signal-to-Noise Ratio | >116 dB |
| Total Harmonic Distortion | <0.003% at 0 dBu, 1 kHz |
| Common-Mode Rejection Ratio | >80 dB at 1 kHz |
| Channel Separation | >114 dB at 0 dBu, 1 kHz |
| Sampling Rate | 96 kHz |
| A/D and D/A Conversion | 32-bit |
| DSP Processing | High-precision floating-point processing |
| FIR Processing | Up to 1,024 taps |
| Input Parametric EQ | 12 bands per input |
| Output Parametric EQ | 15 bands per output |
| Dynamic EQ | 2 bands per input and output |
| EQ Frequency Range | 19.7 Hz–20 kHz |
| EQ Gain Range | −20 to +20 dB |
| EQ Bandwidth | 0.05–3 octaves |
| Delay Range | 0–1,000 ms |
| Delay Resolution | 10 μs fine / 1 ms coarse |
| Gain Range | −80 to +12 dB |
| Crossover Types | Linkwitz-Riley, Bessel and Butterworth |
| Crossover Slopes | 12, 18, 24, 30, 36, 42 and 48 dB/octave |
| Matrix Routing | 4-input × 8-output |
| Signal Generator | White noise, pink noise, sine wave and frequency sweep |
| PC Interfaces | USB, RS-485 and TCP/IP |
| Preset Storage | Up to 60 user presets |
| Display | 2 × 24-character blue-backlit LCD |
| Level Indicators | 5-segment LED input/output level meters |
| System Latency | Approximately 1.5 ms |
| Power Consumption | ≤35 W |
| Power Supply | AC 90–240 V, 50/60 Hz |
| Product Dimensions | 482 × 228 × 44 mm |
| Net Weight | 3.55 kg |
Packing Information
| Packing Item | Specification |
|---|---|
| Single-Unit Carton | 555 × 325 × 98 mm |
| Single-Unit Volume | 0.0177 m³ |
| Single-Unit Gross Weight | 4.55 kg |
| Six-Unit Carton | 573 × 337 × 615 mm |
| Six-Unit Volume | 0.1188 m³ |
| Six-Unit Gross Weight | 28.5 kg |
Applications
- Professional touring sound systems
- Live concerts and outdoor events
- Clubs, bars and entertainment venues
- Theatres and performing arts centres
- Houses of worship
- Conference and presentation systems
- Multi-zone commercial audio installations
- Full-range and subwoofer management
- Delay towers and distributed sound systems
- Professional audio rental systems
- Recording and broadcast facilities
- Fixed installation projects
Why Choose the DP948?
The DP948 combines flexible 4-input and 8-output matrix routing with powerful EQ, crossover, delay, dynamics and FIR processing in a compact 1U design. Its comprehensive network control options simplify system configuration, while the extensive input and output processing functions provide the precision required for professional loudspeaker management.
For touring, rental, installation and multi-zone sound systems, the DP948 provides reliable control, flexible signal distribution and accurate system optimization from a single professional DSP platform.
