The TOA DP-K1 is a professional-grade digital signal processor engineered for complex commercial audio installations requiring advanced acoustic correction, flexible routing, and comprehensive signal processing. Designed for houses of worship, sports arenas, convention centers, airports, corporate facilities, educational institutions, and performing arts venues, the DP-K1 delivers sophisticated audio management in a modular, scalable platform.

At the heart of the DP-K1 is TOA's proprietary Automatic Resonance Control (ARC) technology—an intelligent acoustic correction system that automatically detects and corrects problematic room modes and resonances that degrade speech intelligibility and overall sound quality. This advanced feature sets the DP-K1 apart from conventional DSPs, making it particularly valuable in acoustically challenging spaces where traditional equalization alone cannot solve fundamental acoustic issues.

The modular architecture supports up to eight microphone/line inputs and eight line outputs with full matrix routing capabilities, enabling complex multi-zone configurations and room-combining scenarios. Comprehensive DSP tools—including multi-band parametric EQ, dynamics processing (compression, limiting, gating), crossovers, and delay—provide complete control over every aspect of the audio signal path.

PC-based programming software with built-in network connectivity enables intuitive configuration, real-time monitoring, and remote access from anywhere on the network. Preset recall and contact-closure remote control capabilities streamline operation for end users, while TOA's industry-leading five-year warranty ensures long-term reliability for mission-critical installations.

TOA DP-K1 Key Features

  • Modular I/O architecture – Up to 8 mic/line inputs and 8 line outputs
  • Automatic Resonance Control (ARC) – TOA's proprietary acoustic correction technology
  • Intelligent room mode detection – Automatically identifies problematic resonances
  • Enhanced speech intelligibility – Corrects acoustic issues that traditional EQ cannot address
  • Full matrix routing – Any input to any output with independent processing
  • Comprehensive DSP processing:
    • Multi-band parametric equalizer
    • Compressor/limiter per channel
    • Noise gate per channel
    • Crossover filters (high-pass, low-pass, band-pass)
    • Delay up to 500ms per channel (verify spec)
    • Gain control and polarity inversion
  • PC-based programming – Intuitive software for configuration and control
  • Built-in network interface – Ethernet connectivity for remote access and monitoring
  • Preset recall system – Store and instantly recall complete configurations
  • Contact-closure remote control – External triggering for preset changes
  • Multi-zone capability – Independent processing and routing per zone
  • Room combining support – Merge/divide zones for flexible space utilization
  • Real-time monitoring – Visual feedback on signal levels and processing
  • Professional construction – Rack-mountable chassis for commercial installations
  • Five-year warranty – TOA's commitment to long-term reliability

TOA DP-K1 Specifications

Audio Performance

  • A/D Conversion: 24-bit (typical—verify)
  • D/A Conversion: 24-bit (typical—verify)
  • Sample Rate: 48 kHz (typical—verify)
  • Frequency Response: 20 Hz – 20 kHz (±0.5 dB) (typical—verify)
  • THD+N: <0.01% @ 1 kHz (typical—verify)
  • Dynamic Range: >100 dB (typical—verify)
  • Latency: <3 ms (typical—verify exact specification)
  • Crosstalk: <-90 dB @ 1 kHz (typical—verify)

Input Specifications (Per Channel)

  • Input Types: Microphone or line-level (switchable per input)
  • Connectors: Phoenix/Euroblock screw terminals or XLR (verify configuration)
  • Microphone Input:
    • Sensitivity: -60 dBu to -20 dBu (adjustable)
    • Impedance: 2kΩ balanced
    • Phantom Power: +48V switchable per input (verify availability)
    • Max Input Level: -20 dBu (with pad—verify)
  • Line Input:
    • Sensitivity: -20 dBu to +20 dBu (adjustable)
    • Impedance: 10kΩ balanced
    • Max Input Level: +20 dBu
  • Common Mode Rejection: >60 dB @ 1 kHz (for balanced inputs)

Output Specifications (Per Channel)

  • Output Type: Balanced line-level
  • Connectors: Phoenix/Euroblock screw terminals or XLR (verify configuration)
  • Output Level: Adjustable (typically +4 dBu to +20 dBu maximum)
  • Output Impedance: 600Ω or 120Ω balanced (typical—verify)
  • Max Output Level: +20 dBu (typical—verify)
  • Load Impedance: 600Ω minimum (typical)

Automatic Resonance Control (ARC)

  • Technology: TOA proprietary acoustic correction algorithm
  • Function: Automatically detects and corrects room resonances and modes
  • Detection Method: Analyzes frequency response and identifies problematic peaks
  • Correction: Applies precise notch filters to problematic frequencies
  • Number of Filters: Multiple automatic notch filters (verify exact number)
  • Frequency Range: 20 Hz – 20 kHz (typically focuses on speech range 100 Hz – 8 kHz)
  • Filter Bandwidth: Narrow, precise correction (minimizes impact on adjacent frequencies)
  • Activation: User-initiated via software or automatic continuous mode (verify options)
  • Applications:
    • Reverberant spaces with strong room modes
    • Speech reinforcement in difficult acoustics
    • Feedback-prone environments
    • Large rooms with parallel walls
    • Spaces with strong low-frequency resonances

Digital Signal Processing (DSP)

Parametric Equalizer:

  • Type: Multi-band parametric per input and output
  • Bands per Channel: 8-12 bands typical (verify exact number)
  • Filter Types: Bell, shelf (high/low), notch
  • Frequency Range: 20 Hz – 20 kHz
  • Gain Range: ±15 dB or ±20 dB (verify)
  • Q Range: 0.5 to 20 (verify exact range)

Dynamics Processing:

  • Compressor/Limiter:
    • Available on: All inputs and outputs (verify)
    • Threshold: Adjustable
    • Ratio: 1:1 to ∞:1 (limiting)
    • Attack Time: 0.1 ms to 200 ms (typical—verify)
    • Release Time: 10 ms to 5 seconds (typical—verify)
    • Knee: Hard or soft (verify)
    • Makeup Gain: Adjustable
  • Noise Gate:
    • Available on: All inputs (verify)
    • Threshold: Adjustable
    • Attack Time: Fast (typical)
    • Release Time: Adjustable
    • Depth: Adjustable attenuation

Crossover Filters:

  • Types: High-pass, low-pass, band-pass
  • Filter Slopes: Butterworth, Linkwitz-Riley, Bessel (verify available types)
  • Slopes: 6, 12, 18, 24, 48 dB/octave (verify available slopes)
  • Frequency Range: 20 Hz – 20 kHz
  • Applications: Speaker management, subwoofer crossover, driver protection

Delay:

  • Maximum Delay: Up to 500 ms per channel (typical—verify exact spec)
  • Resolution: 0.1 ms or finer (verify)
  • Applications: Speaker alignment, zone synchronization, lip-sync correction
  • Distance Conversion: Software displays in ms, feet, or meters

Matrix Routing:

  • Configuration: Any input to any output
  • Mixing: Multiple inputs can be mixed to a single output
  • Distribution: A single input can route to multiple outputs
  • Level Control: Independent gain per crosspoint
  • Mute: Per crosspoint or global
  • Applications: Multi-zone audio, room combining, flexible routing

Preset Memory:

  • Number of Presets: 50-100+ (
  • Recall Methods:
    • PC software (Ethernet)
    • Front panel
    • Contact-closure triggers (external control)
    • RS-232 commands
  • Stored Parameters: All DSP settings, routing, levels, processing
  • Recall Speed: Instantaneous or fade transition 

Control & Connectivity

Network Interface:

  • Connection: Ethernet 10/100 Mbps (RJ-45)
  • Protocols: TCP/IP
  • Network Configuration: DHCP or static IP
  • Remote Control: Full programming and control via Ethernet
  • Remote Monitoring: Real-time metering and status
  • Security: Password protection

Contact Closure Control:

  • Inputs: Multiple contact-closure inputs for preset recall (verify number)
  • Trigger Type: Dry contact or voltage trigger (verify spec)
  • Functions: Preset recall, mute control, other programmable functions
  • Applications: Wall panels, lighting control integration, room automation

Computer Interface:

  • Required: Windows PC with Ethernet (verify Mac compatibility)
  • Software: TOA DP-K1 programming software (included)
  • Connection: Ethernet (local or remote via network)
  • Features:
    • Graphical signal flow display
    • Real-time metering
    • Parameter adjustment with visual feedback
    • Preset management
    • System backup/restore
    • Firmware updates

Additional Control Options (Verify Availability):

  • RS-232 Serial: For third-party control systems (AMX, Crestron)
  • GPIO: General-purpose inputs/outputs for automation
  • Front Panel: LCD and controls 

Front Panel (If Equipped)

  • LCD showing system status
  • Navigation buttons for menu access
  • Preset recall buttons
  • Level adjustment controls
  • Lock function to prevent unauthorized changes

Rear Panel

  • Input connectors (Phoenix/Euroblock or XLR × 8)
  • Output connectors (Phoenix/Euroblock or XLR × 8)
  • Ethernet port (RJ-45)
  • Contact-closure terminal block
  • RS-232 port (if available)
  • GPIO terminals (if available)
  • AC power input (IEC connector)

Physical

  • Dimensions: 19" × 1.75" or 3.5" × 12–14" (483 × 44/88 × 305–355 mm)
  • Weight: Approx. 8-15 lbs (4-7 kg)
  • Mounting: Standard EIA 19" rack mount
  • Construction: Steel or aluminum chassis
  • Cooling: Convection or low-noise fan
  • Finish: Professional black

Power Requirements

  • AC Input: 100-240V AC, 50/60 Hz
  • Power Consumption: 25-50W typical
  • Standby Power: <5W 

Operating Conditions

  • Operating Temperature: 32°F – 104°F (0°C – 40°C)
  • Storage Temperature: -4°F – 122°F (-20°C – 50°C)
  • Humidity: 90% RH or less (non-condensing)

Certifications

  • UL Listed
  • cUL Listed
  • CE Compliant
  • FCC Part 15 Class A
  • RoHS Compliant

Why Choose the TOA DP-K1?

  • Automatic acoustic correction – ARC technology solves problems that traditional EQ cannot
  • Professional results without expert tuning – Intelligent automation
  • Comprehensive DSP – All tools needed for complex installations
  • Flexible matrix routing – Any input to any output configuration
  • Network control – Remote programming and monitoring
  • Modular scalability – Expand as the system grows
  • Room combining support – Ideal for flexible spaces
  • TOA quality – Proven reliability in commercial installations
  • Five-year warranty – Industry-leading coverage
  • Excellent value – Professional features at a competitive price

What's in the Box

  • TOA DP-K1 digital signal processor
  • AC power cord
  • Rack mount ears/brackets and hardware
  • Phoenix/Euroblock connector plugs
  • Programming software (CD or download)
  • USB-to-Ethernet adapter (if required)
  • User manual
  • Quick start guide
  • Warranty registration card

Frequently Asked Questions

Q: What makes ARC different from regular auto-EQ systems? A: ARC specifically targets room resonances and modes that cause boomy, muddy sound and reduce speech clarity. It's more focused than broad auto-EQ and complements (not replaces) traditional equalization.

Q: Can I expand beyond 8 inputs and 8 outputs? A: Check with TOA for expansion options. Some DSPs support cascading multiple units or expansion cards. The modular design suggests expansion capability, but verify specific options.

Q: Do I need to be an acoustician to use ARC? A: No—that's the advantage. ARC automatically analyzes and corrects acoustic problems. You may want expert review for critical applications, but ARC provides professional results without specialized training.

Q: Can this replace my analog mixer? A: The DP-K1 is primarily a signal processor and router, not a live mixing console. It excels at fixed installations where routing and processing are configured, then recalled via presets. For live mixing with faders and real-time adjustments, pair it with a mixer or digital mixing console.

Q: How many presets can I create? A: Verify exact number in specifications (typically 50-100+). This is usually more than sufficient for most installations.

Q: Is the DP-K1 compatible with Dante or other audio networks? A: Verify current specifications. Some DSPs offer optional network audio cards. The DP-K1 includes Ethernet for control, but check if audio-over-IP is supported.

Q: Can I control this from an iPad or tablet? A: Check if TOA offers mobile apps. Even if not, if remote desktop software is used, you can access the PC programming software from tablets.

Q: What's the latency through the DP-K1? A: Typical DSP latency is <3ms, which is imperceptible. For applications requiring lip-sync (video), the delay function can compensate.

List price: $5,142.00
Price: $4,155.00
SKU: DP-K1 CU
Catalog: 
Processors & DSP
Brand: 
TOA
Dimensions: 23 in × 20 in × 10 in
Weight: 20 lb