Network to 40 Watt Stereo Power Amplifier-Dante-Includes North American Power Cord

Ideal Use Cases

The RDL SF-NP40D is suited to systems that need to convert two Dante network audio signals into amplified stereo outputs for 4 Ω or 8 Ω loads. Each channel delivers up to 20 W into 8 Ω or 15 W into 4 Ω, making the module a direct network-to-power-amplifier endpoint. Switch-selectable load impedance supports either specified load, while two balanced outputs are provided on a detachable terminal block. This SF-NP40D version includes a North American power cord.

Why Choose This Model

This model combines Dante reception, 24-bit digital audio support, and two-channel Class D amplification in an enclosure measuring 3.51 inches wide, 1.68 inches high, and 5.77 inches deep. It supports sample rates of 44.1, 48, 88.2, and 96 kHz, with 48 kHz as the default. The RJ45 network connection operates at 100 Mbps and includes Link and Speed indicators. A front-panel Sync indicator provides a direct view of network synchronization, and special software is not required for module setup.

Installation and Integration

The SF-NP40D receives Dante audio through its RJ45 Ethernet connector. Rear-panel Link and Speed indicators display network connection status, while the front-panel Sync indicator shows synchronization status. The two amplified outputs connect through a detachable terminal block, and the load impedance is switch-selectable between 4 Ω and 8 Ω. The included power supply accepts 100 to 240 Vac at 50 to 60 Hz through an IEC C14 inlet and supplies the module with a ground-referenced 24 Vdc, 2 A output. The specified ambient operating range is 0° C to 40° C. A North American power cord is included with this SKU.

Performance Highlights

The amplifier is referenced so that a 0 dBFS input produces 20 W into an 8 Ω load. Maximum output is 20 W per channel into 8 Ω or 15 W per channel into 4 Ω. Its published audio specifications provide concrete parameters for system design and evaluation:

• Digital audio: Dante protocol with 24-bit depth and selectable sample rates from 44.1 to 96 kHz.
• Frequency response: 20 Hz to 20 kHz, specified at +0/-6 dB.
• THD+N: Less than 0.1% from 20 Hz to 20 kHz at +4 dBu/-20 dBFS, with 0.015% at 1 kHz typical.
• Noise: Less than -80 dB below 20 W into 8 Ω.
• Crosstalk: Less than -75 dB at 1 kHz, measured output to output.
• Headroom: 20 dB above -20 dBFS.

What Makes It Different

The defining feature of the SF-NP40D is its combination of two-channel Dante audio conversion and stereo power amplification. It converts two network audio signals directly into two powered outputs without requiring special software for module setup. High-efficiency Class D operation is paired with thermal and short-circuit protection. Switch-selectable 4 Ω or 8 Ω operation allows the output configuration to match the connected load, while the network and Sync indicators place essential status information on the module itself.

Final Assessment

The RDL SF-NP40D provides a clearly specified path from Dante network audio to two amplified output channels. Its 24-bit support, four selectable sample rates, 100 Mbps Ethernet interface, balanced detachable output connector, and output ratings for both 4 Ω and 8 Ω loads define its integration capabilities. The included universal-input power supply and North American power cord complete this version, while the compact enclosure, Class D operation, and built-in protection address practical installation requirements.