SoundTube OS‑440 Outdoor Smart Amplifier

The Phase Technology OS‑440 is a four-channel outdoor smart amplifier engineered for high-quality distributed audio in exterior environments. Supporting up to 40 watts per channel at 4 ohms or 80 watts bridged, this device integrates WiFi, Bluetooth, DLNA streaming, and mobile app control for complete flexibility. It’s ideal for patios, gardens, and other outdoor spaces where interior wiring access is limited.

Designed for installation in protected cabinets or weatherproof enclosures, the OS‑440 is not waterproof but purpose-built for outdoor use. It features a wide array of input types, advanced audio configuration through mobile apps, and reliable output connections via Euroblock. With a compact profile, multiple certifications, and smart wireless capability, it’s a powerful and adaptable solution for premium outdoor sound.

Key Features

• Channels: 4-channel amplifier with 40W per channel (4Ω) or 2×80W bridged
• Wireless Connectivity: WiFi with Direct mode, Bluetooth, DLNA streaming
• Mobile App Support: MSE-OS for multi-zone control and configuration
• Inputs: Analog mini jack, Optical TOSLINK, Bluetooth, WiFi
• Output Connector: Euroblock
• Voltage Gain: 29.5 dB
• Input Impedance: 12 kΩ
• Certifications: CE, RoHS, UL 60065, FCC
• Environment: Designed for outdoor cabinet install; not waterproof

Technical Specifications

• Dimensions: 8.4" × 6.06" × 1.75" (21.3 × 15.4 × 4.45 cm)
• Shipping Weight: 5.3 lbs (2.4 kg)
• Carton Dimensions: 11" × 10" × 5.75" (27.9 × 25.4 × 14.6 cm)
• Power Output: 4 × 40 W @ 4Ω, or 2 × 80 W bridged
• Wireless Protocols: WiFi, Bluetooth, DLNA
• Input Types: Optical, Mini Jack, Bluetooth, WiFi
• Output Type: Euroblock

What's Included

• OS-440 Outdoor Amplifier Unit
• External Power Supply Unit
• Bluetooth/WiFi Antenna
• Euroblock Connector