TOA NX-300W Networked Audio Processor - Advanced Audio Networking and Real-Time Signal Transmission

The TOA NX-300W Networked Audio Processor is an innovative audio adapter designed to seamlessly transmit high-quality audio signals and control information over existing LAN or WAN networks. Utilizing packet audio technology, the NX-300W ensures real-time transmission, allowing for flawless audio delivery without the need for additional wiring. This feature makes it an ideal solution for large-scale audio systems where maintaining consistent quality is essential, such as in broadcasting, industrial settings, and public address applications.

With the ability to transmit audio and control signals simultaneously, the NX-300W is perfect for environments where both high-quality sound and control functionality are crucial. It supports up to 8 different priority levels for broadcasting audio files, enabling flexibility in managing audio content across multiple locations. The device’s dual-channel full-duplex capability allows for bi-directional transmission of dual mono signals, making it a versatile addition to any professional audio network. Whether used for system intercoms, announcements, or background music, the NX-300W provides the reliability and scalability needed for demanding applications.

Additionally, the NX-300W offers exceptional scalability. Up to 500 NX-300 units can be interconnected via a single LAN, allowing for expansive audio networks. Each audio signal can be streamed to a maximum of 16 NX-300Ws using unicast transmission or 64 NX-300Ws using multicast transmission, ensuring that audio content can be delivered simultaneously across a vast number of devices. This makes the NX-300W a powerful choice for enterprises that need to maintain synchronized audio throughout a large facility or across multiple locations.

Key Features

• Audio Input: 2 channels, balanced (transformer isolated)/unbalanced changeable, volume adjustable.
• Audio Output: 2 channels, balanced (transformer isolated), 600 Ω or less.
• Audio Format: WAV file support, sub-band ADPCM encoding.
• Control Inputs/Outputs: 8 control input channels, open collector outputs, relay outputs.
• Network Connectivity: 10BASE-T/100BASE-TX, supporting TCP, UDP, HTTP, RTP, and more.
• Voice Sampling: 8 kHz, 16 kHz, 32 kHz, and 48 kHz (software-controllable).
• Storage: Supports up to 32 GB SD/SDHC card for log storage (max. 10,000 entries).
• Mounting Options: Rack, desk, or surface mountable, with optional rack or wall mounting brackets.
• Operating Temperature: -10°C to +50°C (14°F to 122°F).
• Scalability: Up to 500 units can be connected over LAN, with up to 1,000 links.
• Broadcast Capability: Up to 16 NX-300W devices for unicast and 64 devices for multicast transmissions from one audio input.

Technical Specifications

Power Source: Supplied from an external 24 V DC (21.6 - 26.4 V) power supply or AC adapter AD-246 (option) or equivalent.
Current Consumption: 10 W (AC operation), 310 mA (DC operation).

Audio Input: 2 channels, balanced (transformer isolated)/unbalanced changeable, 2 kΩ, LINE/MIC changeable, volume adjustable.
Rated Input: -20 dB (*2) (LINE)/-60 dB (*2) (MIC).
PAD Function: -16 dB (*2), removable terminal block (6 pins).

Audio Output: 2 channels, balanced (transformer isolated), 600 Ω or less.
Rated Output: 0 dB (*2) (unbalanced input)/-2 dB (*2) (balanced input), removable terminal block (6 pins).

Frequency Response: 50 Hz - 18 kHz (48 kHz sampling frequency, PCM, 0 to -6 dB deviation referred to 1 kHz).
Distortion: 0.2 % or less (1 kHz, LINE signal level, 48 kHz sampling frequency, PCM, BPF).
Signal to Noise Ratio: 73 dB or more (LINE signal level, at rated output).
Separation: 70 dB or more (1 kHz, LINE signal level, BPF).

Audio Format: WAV file.
Number of Storable Audio Files: Max. 8.
Storable Time of Audio File: Max. 2 min. per audio file (16 kHz sampling frequency, sub-band ADPCM, monaural operation).

Control Input: 8 channels, no-voltage make contact input, open voltage: 24 V DC, short-circuit current: 2 mA or less, removable terminal block (9 pins). (Only Channel 8 equipped with failure detection.)
Control Output: 8 channels, open collector output (polarized), withstand voltage: 30 V DC, control current: 50 mA max., removable terminal block (9 pins).
Relay Output: 2 channels, non-polarized, withstand voltage: 30 V DC, control current: 500 mA max., removable terminal block (4 pins).

Network I/F: 10BASE-T/100BASE-TX, Full-duplex/Half-duplex Auto-negotiation.
Network Protocol: TCP, UDP, ARP, HTTP, RTP, IGMP, FTP, NTP.
Audio Packet Transmission System: Unicast (Up to 16 simultaneous transmissions), Multicast (Up to 64 simultaneous transmissions).
Connector: RJ45 connector.
Voice Sampling Frequency: 8 kHz, 16 kHz, 32 kHz, 48 kHz (controllable on the software).
Quantizing Bit Number: 16 bits.
Voice Encoding Method: PCM, Sub-band ADPCM (controllable on the software).
Voice Packet Loss Recovery: Silence insertion.
Audio Delay Time: Min. 20 ms.

SD Section: For log storage (Max. 10,000 entries).
Media: SD/SDHC card (Max. 32 GB) (*3).
File System: FAT16, FAT32.
Installation Method: Rack, Desk, Surface mount.
Operating Temperature: -10 °C to +50 °C (14 °F to 122 °F), 0 °C to +40 °C (32 °F to 104 °F) when AC adapter is in use.
Operating Humidity: 90 %RH or less (no condensation).

Dimensions: 8.27" x 1.74" x 10.16"
Weight: 3.75 lb.

Included Accessories: Removable terminal plug (3 pins) x 1, Removable terminal plug (6 pins) x 2, Removable terminal plug (9 pins) x 2, Removable terminal plug (4 pins) x 1, Plastic foot x 4, Screw for fitting plastic foot x 4.
Optional Accessories: Rack mounting bracket: MB-15B-BK (for rack mounting one NX-300 unit), MB-15B-J (for rack mounting two NX-300 units), Wall mounting bracket: YC-850, AC adapter: AD-246.