The TOA A-812D is a professional 120-watt digital mixer amplifier designed for versatile commercial audio applications requiring advanced control, flexible connectivity, and reliable performance. Ideal for corporate facilities, educational institutions, retail environments, restaurants, houses of worship, and multi-zone paging systems, the A-812D combines powerful digital signal processing with network-based remote control for modern installed sound solutions.

Featuring eight flexible inputs with individual DSP processing, the A-812D handles background music, foreground audio, paging announcements, and noise masking applications with precision and clarity. Browser-based configuration and monitoring enable remote system management from any networked device, eliminating the need for on-site adjustments and streamlining system maintenance. Two expansion module slots accommodate TOA's 900 Series modules for enhanced functionality, while dedicated Music On Hold (MOH) output supports telephone system integration.

Built on TOA's renowned platform of reliability and professional-grade construction, the A-812D delivers the sophisticated audio processing and intuitive control required for demanding commercial environments—all in a competitively priced, rack-mountable package.

TOA A-812D  Key Features

  • 120W digital power amplification – Clean, efficient Class D amplification for reliable performance
  • 8 versatile inputs – Flexible MIC/LINE inputs with independent DSP processing
  • Advanced built-in DSP – Comprehensive EQ, dynamics, crossover, and routing control
  • Browser-based control – Configure and monitor via web interface from any networked device
  • Remote network management – Adjust settings and monitor system status from anywhere on the network
  • Two 900 Series module slots – Expandable functionality with optional TOA modules
  • Music On Hold (MOH) output – Direct connection to telephone systems
  • Multi-zone capability – Route and process audio independently to multiple zones
  • Dante network audio – Optional digital audio networking (with compatible module)
  • Scene recall – Save and instantly recall custom configurations for different events
  • Scheduled events – Program automatic volume changes, source selection, and more
  • Priority paging – Automatic ducking and override for emergency announcements
  • Feedback suppression – Intelligent notch filtering eliminates feedback issues
  • Comprehensive I/O – Multiple input and output options for system flexibility
  • Rack-mountable design – Standard EIA 2U or 3U rack installation
  • Professional reliability – Built for continuous operation in commercial environments

Toa A-812D Specifications

Power Output

  • Rated Power: 120W total
  • Amplifier Type: Class D digital switching amplifier
  • THD+N: <0.1% at rated output (1 kHz)
  • Frequency Response: 20 Hz – 20 kHz (±0.5 dB)
  • S/N Ratio: >90 dB (A-weighted)

Inputs (8 Total)

  • Input Types: Switchable MIC/LINE per channel
  • MIC Input:
    • Connector: Phoenix/Euroblock or XLR (model-dependent)
    • Sensitivity: -60 dBV to -20 dBV (adjustable)
    • Impedance: 2kΩ balanced
    • Phantom Power: 24V DC (switchable per input)
  • LINE Input:
    • Sensitivity: -20 dBV to +10 dBV (adjustable)
    • Impedance: 10kΩ balanced/unbalanced
  • Input Processing: Independent DSP per channel (EQ, compression, gate, delay)

Outputs

  • Speaker Outputs:
    • 100V/70V constant voltage or 4-8Ω low impedance
    • Phoenix/Euroblock screw terminals
  • Line Outputs:
    • Balanced line-level outputs (XLR or Phoenix)
    • Adjustable output level
  • MOH (Music On Hold) Output:
    • RCA or Phoenix connector
    • -10 dBV nominal level
  • Zone Outputs: Configurable multi-zone routing

Digital Signal Processing (DSP)

  • Parametric EQ: Multi-band per input and output
  • Dynamics Processing:
    • Compressor/limiter per input
    • Noise gate per input
  • Crossover: Configurable high-pass and low-pass filters
  • Delay: Up to 500ms per channel (for speaker alignment)
  • Feedback Suppression: Automatic notch filtering (up to 12 notches)
  • Auto Gain Control (AGC): Maintains consistent levels
  • Ducking/Priority: Automatic level reduction for paging

Network & Control

  • Ethernet: 10/100 Mbps RJ-45 connection
  • Control Interface: Browser-based GUI (no software installation required)
  • Supported Browsers: Chrome, Firefox, Safari, Edge
  • Remote Access: Control from PC, tablet, or smartphone
  • DHCP/Static IP: Flexible network configuration
  • Monitoring: Real-time input/output metering, system status
  • Scheduling: Time-based automation and event programming
  • Scene Memory: Store and recall up to 100+ presets

Expansion & Integration

  • Module Slots: 2 × 900 Series expansion slots
  • Compatible Modules:
    • Digital input/output modules
    • Dante network audio module
    • Additional analog I/O modules
    • Contact closure/GPIO modules
  • External Control: RS-232, GPIO contact closure inputs (model-dependent)

Front Panel

  • LCD display (status and metering)
  • Navigation buttons and encoder
  • Input gain controls (optional)
  • Power ON/OFF switch
  • LED indicators (power, signal, clip, network)

Protection Features

  • Output short circuit protection
  • Overload protection with auto recovery
  • Thermal protection with intelligent fan control
  • DC offset protection
  • Soft-start circuitry
  • Password-protected settings

Physical

  • Dimensions: 19" × 5.25" × 12.6" (483 × 133 × 320 mm) – 3U rack height (verify exact specs)
  • Weight: Approx. 15-18 lbs (7-8 kg)
  • Mounting: Standard EIA 19" rack mount (3U)
  • Construction: Steel chassis with forced-air cooling
  • Finish: Black

Power Requirements

  • AC Input: 120V AC, 60 Hz (or regional voltage: 100-240V AC, 50/60 Hz)
  • Power Consumption: 200W maximum
  • Standby Power: <1W

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 (Canada)
  • CE compliant (Europe)
  • RoHS compliant

Applications

  • Corporate & Commercial:
    • Conference and meeting rooms
    • Office background music and paging
    • Retail stores and shopping centers
    • Hotels and hospitality venues
  • Education:
    • Classrooms and lecture halls
    • Cafeterias and common areas
    • Gymnasiums and auditoriums
    • Campus-wide paging systems
  • Worship:
    • Sanctuary and overflow rooms
    • Fellowship halls
    • Multi-campus installations
  • Entertainment & Hospitality:
    • Restaurants and bars
    • Fitness centers and spas
    • Museums and galleries
    • Theme parks and attractions
  • Specialized:
    • Healthcare facilities
    • Transportation terminals
    • Government buildings
    • Sound masking systems

Browser-Based Control Advantages

The A-812D's web-based interface provides unprecedented flexibility:

  • No software installation – Access from any device with a web browser
  • Remote management – Adjust settings from anywhere on the network
  • Multi-user access – Multiple administrators can monitor and control
  • Intuitive GUI – Visual interface with drag-and-drop routing and real-time metering
  • Mobile-friendly – Manage from smartphones and tablets
  • Secure access – Password protection with multiple user permission levels

System Integration & Expansion

The A-812D's modular design enables seamless integration with existing systems:

  • Dante audio networking – Add optional module for low-latency digital audio transport
  • Third-party integration – Compatible with control systems via IP, RS-232, or GPIO
  • Scalable architecture – Link multiple A-812D units for larger installations
  • Telephone integration – MOH output connects directly to phone systems
  • Emergency override – Priority paging with automatic ducking and voice clarity

Why Choose the TOA A-812D?

  • Professional DSP in a compact package – Advanced processing typically found in higher-priced units
  • Network-ready – Modern IP control eliminates costly proprietary control systems
  • Flexible expansion – Grow your system as needs change with optional modules
  • Proven reliability – TOA's reputation for durability in continuous-use commercial applications
  • Intuitive operation – Browser-based control simplifies training and daily use
  • Excellent value – Enterprise-level features at a competitive price point

What's in the Box

  • TOA A-812D digital mixer amplifier
  • AC power cord
  • Rack mount ears/brackets
  • Phoenix/Euroblock connectors (for inputs/outputs)
  • Ethernet cable
  • User manual and quick start guide
  • CD with documentation (if applicable)
List price: $1,263.00
Price: $1,021.00
SKU: A-812D
Catalog: 
Commercial Amplifiers
Brand: 
TOA
Dimensions: 21 in × 17 in × 8 in
Weight: 16 lb