1. Introduction to the IP Audio Zone Selector DP-SP12

The DP-SP12 IP Audio Zone Selector is a smart broadcasting solution that utilizes IP technology, enabling two-way audio signal encoding and decoding with high-quality sound transmission. The device is designed for zoned broadcasting, remote control via LAN/WiFi/4G networks, and integrates various automation features. It is suitable for schools, hospitals, factories, and urban areas.

2. Main Functions

Multi-mode Broadcasting

• Local broadcasting: via Microphone / Line-in

• Network broadcasting: via Internet / LAN

• Stored media broadcasting: via USB / SD card

Scheduled Playback

• Automatically plays stored audio files according to a preset schedule, even when the network connection is lost.

Emergency Alert

• Automatically activates when receiving signals from sensors such as fire alarms or incident detectors.

External Device Control

• Equipped with 2 relay ports (NO/NC) to control external electrical devices.

Remote Monitoring

• Check connection status, CPU temperature, and voltage through a mobile app or web interface.

3. Key Features

Two-way audio transmission
Audio signals are encoded and decoded through Internet, LAN, WiFi, or 4G networks.

Flexible zone selection
Broadcast announcements by group or across the entire system.

Multiple audio sources supported
Microphone, Line-in, internal storage (USB/SD card), and playback of MP3 / WAV / FLAC files.

Automation capabilities
Automatically broadcast alerts when receiving signals from sensors (fire alarms, incidents).

Remote control
Manage the system via mobile application or web interface, adjust volume, and schedule broadcasts.

Low latency (≤1 second)
Clear and synchronized audio across large areas.

4. Detailed Technical Specifications

Hardware Specifications

Memory Card Support

• Supports microSD cards

• Maximum capacity 128GB (optional upgrade)

LAN Network Connection

• Ethernet: RJ45 PoE, 10/100 Mbps

WiFi Connection

• 2.4 / 5 GHz, IEEE 802.11 a/b/g/n

Bluetooth

• Bluetooth 5.0

Display

• 7-inch capacitive touchscreen

Built-in Speaker

• Integrated speaker

• Rated power 3W (peak 5W)

Status Indicators

• 02 LED indicators

Control Buttons

• 02 control buttons

Adjustable Potentiometers

• 01 knob for internal speaker/headphone volume

• 01 knob for LINE-IN input volume

• 01 knob for MIC input sensitivity

Device Housing

• Metal casing with electrostatic coating

Operating Temperature & Humidity

• 0°C – 60°C, 10% – 90% RH

Audio Signal Interfaces

• 01 stereo headphone output (3.5mm jack)

• 01 stereo terminal output (L/R)

• 01 LINE-IN input (3.5mm jack, 1Vpp)

• 01 MIC input (6.35mm jack, 1Vpp)

5. Why Choose the IP Audio Zone Selector DP-SP12?

✅ Two-way broadcasting: Instant audio feedback, suitable for online meetings and emergency announcements.

✅ Cost-effective: Utilizes existing network infrastructure, reducing wiring costs by up to 50% compared to analog systems.

✅ High security: Encrypted signal transmission prevents interference and unauthorized access.

✅ Easy scalability: Wireless connectivity allows additional devices to be added without changing the existing infrastructure.

6. Frequently Asked Questions (FAQ)

❓ How many external speakers can be connected?
Supports stereo speaker connection via L/R ports, and can be expanded using external amplifiers if needed.

❓ How can broadcasting be triggered by events?
Configure via the app or web interface: select the audio file and assign it to an input signal (e.g., smoke sensor).

❓ What is the warranty period?
24-month warranty with 24/7 technical support.