Front View
Rear View — Dante, Trigger, Speaker Out
Amplifiers
Two-channel Dante digital amplifier — 120W per channel, half-rack design.
SR-O4120-DN is a compact 2-channel Dante digital amplifier built around an integrated Dante Receiver card, converting digital audio from a Dante network directly into analogue output. Signal routing from any source on the same Dante network is handled through Dante Controller, and the space-saving half-rack chassis mixes and matches easily with other half-rack products to save valuable rack space. Its Class D amplifier stage delivers up to 120W×2 into 4Ω, or 240W bridged into a 70V/100V line. Multiple turn-on modes, a switchable high-pass filter, and full thermal and short-circuit protection make it a flexible, fit-and-forget building block for distributed audio systems.
2 CH
Channels
120W×2
@ 4Ω
240W
Bridged 70V/100V
>90dB
Signal-to-Noise
1/2U
Chassis
Features
01
Dante Network Interface
Integrated Dante Receiver card accepts digital audio directly from the network; route sources with Dante Controller.
02
Class D Efficiency
Cool-running, low-profile, high-efficiency amplifier stage suited to space-conscious system designs.
03
Flexible Turn-On Modes
Always-on, signal-sensing standby, or 12V trigger control — with trigger output to activate downstream devices.
04
Fanless, Fully Protected
Natural cooling with no fan, plus thermal overload and short-circuit protection circuitry on every channel.
Specifications
| Amplifier Output Channels | 2 |
| Output Power @ 8Ω | 20W × 2 (31V RMS), <1% THD+N |
| Output Power @ 4Ω | 120W × 2 (22V RMS), <1% THD+N |
| Bridged Output (HiZ) | 240W @ 70V or 100V, <1% THD+N |
| Frequency Response | 20Hz–20kHz, ±2dB @ 4Ω load |
| Signal to Noise | >90dB @ 1W (20Hz–20kHz) |
| Input Sensitivity | 1.0V (+2.2dBu) @ Max Output 4Ω |
| Gain Value | 25dB @ 4Ω |
| Input Impedance | >10k, Balanced |
| Maximum Input Level | 12.3V (+24dBu) |
| High Pass Filter | 80Hz (±2dB), switchable |
| Trigger In/Out | DC 12V, 3.5mm jack |
| Output Connectors | 4-pin Euro terminal (4Ω/8Ω), 2-pin Euro terminal (70V/100V) |
| Power Requirements | AC 100–240V, 50/60Hz, 350W |
| Chassis | 1/2U |
| Product Dimensions (W×D×H) | 214 × 249.8 × 44mm |
| Net Weight | 1.94 kg |
Dante / Network
Dante Channel Receivers
2
Dante Interface
RJ45 jack, PoE IEEE 802.3af powered
Network Interface
100Mbps Ethernet, RMI interface with MDIO, hardware time-stamping
Receive Flows
2 (unicast or multicast)
Sampling Rate
44.1 / 48 / 88.2 / 96kHz
Resolution
16 / 24 / 32-bit
Latency
From 2ms
Turn-On Modes
Always On
Amplifier active and ready at all times.
Signal-Sensing
Standby until audio signal is detected.
12V Trigger
Precise remote on/off, power-saving standby.
All figures are nominal, per manufacturer data. Output power at 8Ω and 4Ω are as published in source documentation and are not symmetrical by design.
Applications