RDL SF-NP50A 50W Dante to 70/100V Audio Amplifier (North American Model)

RDL SF-NP50A 50W Dante to 70/100V Audio Amplifier (North American Model)

RDL SF-NP50A 50W Dante to 70/100V Audio Amplifier (North American Model)


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Expected availability: 7-10 business days

Product Highlights

  • Converts Dante to Constant Voltage
  • 50W Class-D RMS Power at 70 or 100V
  • RJ45 Input, Gain-Adjustable Line Input
  • Terminal Block & Line Outputs
  • Supports VCA Control & Automatic Ducking
  • Up to 24-Bit/96 kHz Resolution
  • Thermal & Short-Circuit Protection
  • Power via Included 24 VDC Power Supply
  • Durable Metal Enclosure
  • Made in the USA
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Model: North American, Includes Power Cord

Export, Excludes Power Cord

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North American, Includes Power Cord

This item is noncancelable and nonreturnable.

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RDL SF-NP50A overview

  • 1Description

The RDL SF-NP50A is a SysFlex series 50W Dante to 70/100V mono audio amplifier designed to convert one Dante input and an analog input to a constant voltage amplified output for A/V technicians, system installers, and audio engineers in office buildings, retail environments, and educational facilities. Its Class-D output stage delivers 50W of RMS power at 70 or 100V from an analog input and one Dante stream at up to 24-bit/96 kHz resolution.

A single RJ45 input accepts a Dante network audio channel while a gain-adjustable analog source may be routed to the balanced mono terminal block input or the unbalanced 3.5mm stereo mini jack. Selectable-priority automatic ducking allows attenuation or muting of the non-paging signal, making it ideal for announcements. Outputs include two terminal blocks—one accommodates connection to 70 or 100V speakers, and the other sends a balanced line-level signal. A detachable terminal block is provided for hookup of remote control of the internal VCA. Thermal and short-circuit protection guard against electrical damage and unintended shutdown.

The SF-NP50A supports powering via the included 24 VDC external power supply and North American power cord, or from proper wiring to the terminal block power input. Engineered and manufactured in the USA, it boasts a durable metal enclosure for reliable toughness.

Converts one Dante network audio channel and an analog audio input to a 70 or 100V constant voltage amplified output
Provides 50 watts for a network digital audio level of 0 dBFS
Configuration requires no special software
High-efficiency Class-D output stage produces minimal heat for all levels of expected voice or music modulation
RJ45 port for Dante input
Balanced mono terminal block input
Unbalanced 3.5mm stereo mini jack automatically sums the left and right channels to mono
Input gain is set by the installer using a rear-panel, single-turn potentiometer with an associated dual-LED VU meter calibrated to 20 dB below maximum power output
Paging source may be the analog input or the network audio input
Ducking with adjustable threshold, automatic detection circuit, switchable priority, and selectable 25 dB attenuation or mute function
Dante network audio source drives a balanced line-level output on a detachable terminal block to feed the inputs of other audio equipment or power amplifiers
Supports powering via the included 24 VDC external power supply or 24V connection to the dedicated terminal block power input
LED Mute indicator glows yellow when the output is muted
Valid synchronization to the Dante network is indicated by a green LED visible from the front of the unit
Amplifier power is monitored and the current is limited to protect the power supply against shutting down, even during extreme feedback or square wave modulation conditions
Red rear-panel LED flashes when the SF-NP50A reduces power consumption to prevent shutdown of the power supply
Equipped with an internal VCA for setting the output level
Detachable terminal block provides for the connection of an external 10-kOhm potentiometer or a 0 to 10 VDC control voltage
Amplifier gain remains at maximum when the VCA input terminal is not connected
RDL remote controls are available to provide single-turn, multi-turn (rotary encoder), or button (ramp or fixed-level selection) user level control
Constructed in a durable all-metal enclosure suitable for free-standing, surface-mounted, or rack-mounted operation
Engineered and manufactured in the USA for continuous duty in demanding installations
In the Box
RDL SF-NP50A 50W Dante to 70/100V Audio Amplifier (North American Model)
  • North American Power Cord
  • 24 VDC Power Supply
  • Limited 3-Year Warranty
  • Table of Contents
    • 1Description

    RDL SF-NP50A specs

    Inputs 1 x RJ45
    1 x 1/8" / 3.5 mm stereo mini jack (unbalanced)
    1 x detachable terminal block (balanced)
    Outputs 1 x terminal block for 70/100 V output
    1 x detachable terminal block for line output
    Control 1 x detachable terminal block for VCA control
    Amplifier Class-D
    Amplifier Output 50 W RMS (70 or 100 V)
    Ethernet Protocol Dante
    Transmission Rate 100 Mb/s
    Bit Depth 24
    Sample Rates 44.1, 48 (default), 88.2, and 96 kHz
    Reference Level 0 dBFS = 50 W
    Maximum Input Level Balanced: +25 dBu (before clipping)
    Unbalanced: +10 dBV (before clipping)
    Nominal Input Level Balanced: +4 dBu (adjustable)
    Unbalanced: -10 dBV (adjustable)
    Minimum Input Level Balanced: -10 dBu (for 20 dB below full output power)
    Unbalanced: -25 dBV (for 20 dB below full output power)
    Gain Adjustment Single-turn audio taper (with associated dual-LED VU meter calibrated to 20 dB below full output power)
    Output Level +4 dBu for a network level of -20 dBFS
    Input Impedance Balanced: > 10 kOhms
    Unbalanced: > 5 kOhms
    Common Mode Rejection > 60 dB (50 to 120 Hz)
    Frequency Response 50 Hz to 20 kHz (+0 / -3 dB)
    THD + N < 1% (1 kHz)
    Noise Below Maximum Power: < -85 dB
    Below 1/8 Power: < -75 dB
    VCA 0 to 10 VDC control via detachable terminal block (compatible with RDL VCA wall controls)
    Ducking/Muting Source: Switch-selectable priority for network or analog input
    Level: Switch-selectable for 25 dB ducking attenuation (nominal) or off
    Ducking/Muting Actuation Automatic (rear-panel adjustable signal threshold with LED indicator)
    Ducking/Muting Release Delay 4 seconds, nominal
    Ambient Operating Environment 32 to 104°F / 0 to 40°C (68°F / 20°C recommended)
    Indicators Front-Panel: Sync (green), amplifier muted (yellow)
    Rear-Panel: Overload protect (red), Ethernet link and speed (two), dual-LED VU meter (two), ducking threshold
    Plenum Number UL 2043
    Power Requirements 24 VDC at 2700 mA via 100 to 240 VAC, 50-60 Hz, IEC C14 power supply or connection to terminal block power input
    Enclosure Material Metal
    Dimensions (W x H x D) 5.8 x 1.7 x 6.4" / 14.8 x 4.3 x 16.4 cm
    Weight 3.9 lb / 1.8 kg
    Country of Manufacture United States of America

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