DP46+ 4-Input 6-Output Professional DSP Loudspeaker Management Processor
Product Overview
The Haozhiseng Audio DP46+ is a professional 4-input, 6-output digital loudspeaker management processor designed for PA systems, line array systems, live performances, touring productions, houses of worship, entertainment venues, rental systems, and fixed audio installations.
Featuring a 96 kHz sampling rate, 32-bit floating-point DSP processing, and 24-bit A/D and D/A converters, the DP46+ provides accurate signal processing, flexible channel routing, and reliable loudspeaker system control.
Each input and output channel offers independent EQ, delay, gain, polarity, mute, compressor, dynamic EQ, crossover, and limiter functions. The unit can be configured from its front panel or controlled from a computer through USB, RS-485, or TCP/IP.
Key Features
- 4 balanced XLR input channels
- 6 balanced XLR output channels
- 96 kHz sampling frequency
- 32-bit floating-point DSP processor
- 24-bit A/D and D/A converters
- Independent input and output channel processing
- 6-band parametric EQ on every input channel
- 6-band parametric EQ on every output channel
- Adjustable crossover, delay, gain and polarity
- Built-in compressor, limiter and dynamic EQ
- Flexible input-to-output routing
- USB, RS-485 and TCP/IP computer control
- 2 × 24-character blue LCD
- 5-segment LED input and output level indicators
- Front-panel mute and channel-edit controls
- Universal AC 90–240 V power supply
Input Processing Functions
Input Gain
Each input channel provides independent gain adjustment.
- Adjustment range: −80 to +12 dBu
- Adjustment resolution: 0.1 dBu
Input Mute and Polarity
- Independent mute control for each input channel
- Selectable normal or reversed polarity
Input Delay
- Delay range: 0–1,000 ms
- Fine adjustment resolution: 10 μs
- Coarse adjustment resolution: 1 ms
Input Equalizer
Each input channel provides six independently adjustable EQ filters.
Available filter types:
- PEQ
- Low-Shelf
- High-Shelf
- First-order All-Pass Filter
- Second-order All-Pass Filter
PEQ adjustment range:
- Frequency: 19.7 Hz–20 kHz
- 241 selectable frequency points
- Bandwidth: 0.05–3 octaves
- Bandwidth resolution: 0.01 octave
- Gain: −20 to +20 dB
- Gain resolution: 0.1 dB
Shelf filter adjustment:
- Frequency: 19.7 Hz–20 kHz
- 241 selectable frequency points
- Selectable 6 dB/oct or 12 dB/oct slope
- Gain: −20 to +20 dB
- Gain resolution: 0.1 dB
Input Dynamic EQ
Each input channel includes two independent dynamic EQ sections with adjustable frequency, bandwidth, threshold, target level, ratio, attack time, and release time.
Input Compressor
- Threshold range: −40 to +20 dBu
- Threshold resolution: 0.1 dBu
- Compression ratio: 1:1–20:1
- Attack time: 0.3–200 ms
- Release time: 50–5,000 ms
Automatic Gain Control
Each input channel includes automatic gain control with adjustable threshold, target level, ratio, attack time, and release time.
Output Processing Functions
Output Gain and Routing
- Independent gain control for every output channel
- Each output can be routed from any input channel
- Multiple input channels can be combined and assigned to one output
Output Mute and Polarity
- Independent mute control for every output channel
- Selectable normal or reversed polarity
Output Delay
- Delay range: 0–1,000 ms
- Fine adjustment resolution: 10 μs
- Coarse adjustment resolution: 1 ms
Crossover Filters
Each output channel includes independent high-pass and low-pass crossover filters.
Available filter types:
- Linkwitz-Riley
- Bessel
- Butterworth
Crossover specifications:
- Frequency range: 19.7 Hz–20 kHz
- 241 selectable frequency points
- Available slopes: 12, 24, 36 and 48 dB/oct
Output Limiter
Each output channel provides an independent limiter for protecting connected power amplifiers and loudspeakers.
- Threshold range: −40 to +20 dBu
- Threshold resolution: 0.1 dBu
- Attack time: 0.3–200 ms
- Release time: 50–5,000 ms
Output Compressor
- Threshold range: −40 to +20 dBu
- Compression ratio: 1:1–20:1
- Attack time: 0.3–200 ms
- Release time: 50–5,000 ms
Output Equalizer
Each output channel provides six adjustable filters with PEQ, Low-Shelf, High-Shelf, first-order All-Pass, and second-order All-Pass options.
PC Control and Connectivity
The DP46+ supports multiple control methods for portable and permanently installed sound systems:
- Front-panel USB connection
- Rear-panel RS-485 connection with Phoenix terminal
- TCP/IP control through an RJ45 network port
- PC software for parameter adjustment and system management
- Suitable for individual or multiple-device control
Technical Specifications
| Item | Specification |
|---|---|
| Model | DP46+ |
| Product Type | Professional DSP Loudspeaker Management Processor |
| Input Channels | 4 × balanced XLR female connectors |
| Output Channels | 6 × balanced XLR male connectors |
| Input Impedance | Balanced: 23 kΩ |
| Output Impedance | Balanced: 150 Ω |
| Maximum Input Level | ≤+17.3 dBu at 1 kHz |
| Frequency Response | 19.7 Hz–20 kHz, ±0.49 dB |
| Common-Mode Rejection Ratio | >40 dB at 0 dBu, 1 kHz |
| Signal-to-Noise Specification | >−106 dB at 17.3 dBu, 1 kHz |
| Total Harmonic Distortion | <0.007% at 0 dBu, 1 kHz |
| Channel Separation | >100 dB at 0 dBu, 1 kHz |
| Sampling Frequency | 96 kHz |
| DSP Processor | 32-bit floating-point DSP |
| A/D and D/A Conversion | 24-bit |
| Input EQ | 6-band EQ per input channel |
| Output EQ | 6-band EQ per output channel |
| Delay Range | 0–1,000 ms |
| Crossover Filters | Linkwitz-Riley, Bessel and Butterworth |
| Crossover Slopes | 12, 24, 36 or 48 dB/oct |
| PC Interfaces | USB, RS-485 and TCP/IP |
| Display | 2 × 24-character blue LCD |
| Level Indicators | 5-segment LED input and output meters |
| Power Consumption | ≤25 W |
| Power Supply | AC 90–240 V, 50/60 Hz |
| Product Dimensions | 482 × 190 × 44 mm |
| Net Weight | 3.6 kg |
| Single-Unit Carton | 562 × 296 × 98 mm / 0.0163 m³ |
| Master Carton | 6 pieces: 583 × 315 × 615 mm / 0.1129 m³ |
| Gross Weight | 1 piece: 4.5 kg / 6 pieces: 28.5 kg |
Applications
- Professional PA loudspeaker systems
- Line array systems
- Multi-way active loudspeaker systems
- Subwoofer and full-range speaker management
- Live performances and touring productions
- Stage monitor systems
- Clubs and entertainment venues
- Houses of worship
- Conference and multipurpose halls
- Professional audio rental systems
- Fixed sound installations
Why Choose the DP46+?
The DP46+ combines four input channels, six output channels, flexible signal routing, and comprehensive DSP processing in a compact 1U rackmount design.
Its independent EQ, crossover, delay, compressor, limiter, polarity, gain, and routing functions provide precise control of professional loudspeaker systems. USB, RS-485, and TCP/IP connectivity also make system setup and centralized computer control more convenient for both portable and fixed installations.
