DSP Matrix Amplifier: 8-Channel 125W 8ohm // 4-Channel 250W 70/100V
AMP-8-125
Distributed Audio, Custom Audio Distribution
The AMP-8-125 power amplifier delivers configurable and reliable high-performance audio power amplification for commercial and hospitality applications that demand a mix of low impedance and high impedance outputs. With a compact 1U design, this DSP-enabled Class-D amplifier can drive low impedance 4Ω to 16Ω loudspeakers as well as high impedance 70V/100V transformer-coupled loudspeakers. The AMP-8-125 can accept eight balanced or unbalanced analog inputs and one stereo S/PDIF digital input and delivers eight low impedance mono channels (or four low impedance stereo zones) at 125W per channel, or four 70V/100V mono channels at 250W per channel.
For set-up, the RTI web GUI enables effortless browser-based configuration of the installed system. Its DSP configuration options include multizone setup, input mixing, priority and ducking, restriction, input and output EQ, S/PDIF output routing, high-pass filter, speaker presets, delay, Wall-S1 controller configuration, sine wave generator, and more.
Included in the box:
AMP-8-125, power cord, 6-pin Phoenix input connectors (4), 4-pin Phoenix output connectors (4), 8-pin Phoenix GPIO socket connector (1), rack-mount kit (1), adhesive rubber feet (4)

4 Sources / 8 Channels
Four analog audio source inputs (balanced or unbalanced), 1 digital input.
4 Zones
Choose between standard stereo zones or a 70V/100V sound system.
Full Matrix
Distribute four audio source inputs to four zones, expandable to more zones by daisy-chaining multiple AMP-8-125 units.
Powerful Stereo Output
125W power output per channel for stereo zones.
Powerful 70V/100V Output
250W per channel for 70/100V zones.
Built-In DSP
Configure and optimize DSP and matrix settings with the in3tuitive web user interface.
Ultra-Efficient
Cool Power® Class D amplifier technology ensures efficient heat dissipation and low power consumption.
Audio Source Versatility
Use either analog or digital audio sources or a combination of both.
Control
Control the unit with an RTI or 3rd party control systems via IP or use the GPIO control for controller for volume, standby, mute or trigger functions
Mounting Options
Rack mount or free-standing installation with included rack ears and adhesive rubber feet.
Power |
|
| Total System Power | 1,000 W |
| Output Power — Lo-Z (4Ω/8Ω) | 8 x 125 W (4Ω / 8Ω) |
| Output Power — Hi-Z (70V/100V) | 4 x 250 W (70V / 100V*) |
| PowerShare (up to) | 4 x 250 W (across Ch1-2, Ch3-4, Ch5-6, Ch7-8) |
| Power Consumption (full load) | 300 W |
| Power Ratings | 1% THD @ 120 Vac and 230 Vac |
| Power Supply | UREC™ universal switch-mode PSU with PFC and standby converter |
| Operating Voltage / Frequency | Universal Mains — 100–240 VAC ~ 50/60 Hz |
| Standby Consumption | < 0.6 W |
Audio |
|
| Amplifier Class / Output Circuitry | UMAC™ Class D — full bandwidth PWM modulator with ultra-low distortion |
| Output Voltage | 70Vp / 140Vpp unloaded | Bridged: 140Vp / 280Vpp unloaded |
| Signal-to-Noise Ratio | > 106 dB (A-weighted, 20 Hz–20 kHz, 8Ω load) |
| THD+N (typical) | < 0.05% (20 Hz–20 kHz, 8Ω load, 3 dB below rated power) |
| Frequency Response | 20 Hz–20 kHz (+0 / −0.8 dB, 8Ω load, 3 dB below rated power) |
| Protection Circuits | Short Circuit, DC, Undervoltage, Temperature, Overload |
| Network Audio Protocol | Dante® / AES67 (Audinate®) |
| Dante® Audio Channels | Up to 4 in x 4 out audio channels over standard IP network |
Ports |
|
| Analog Input | 8x RCA (Unbalanced Stereo) 4x 6-pin Phoenix Connectors (Balanced Stereo) |
| Digital Input | 1x Coax |
| Digital Output | 1x Coax |
| Analog Output | 4x 4-pin Phoenix Connector |
| Dante® Audio | 1x RJ45 |
| GPIO | 1x 8-pin Phoenix Connector |
Physical / Dimensions |
|
| Dimensions (H × W × D) | mm: 44 x 440 x 319 |
| Weight | 3.8 kg |
| Rack Format | Full Rack, 1U |
| Operating Temperature | 0 – 40 °C |
* 100V line mode is rated at –1 dB (≈ 90 V). ** PowerShare operates independently across Ch1-2, Ch3-4, Ch5-6, and Ch7-8. |
|
| Specifications subject to change without notice. Mass & dimensions are approximate | |
| Data Sheet |
Manual |
Power |
|
| Total System Power | 1,000 W |
| Output Power — Lo-Z (4Ω/8Ω) | 8 x 125 W (4Ω / 8Ω) |
| Output Power — Hi-Z (70V/100V) | 4 x 250 W (70V / 100V*) |
| PowerShare (up to) | 4 x 250 W (across Ch1-2, Ch3-4, Ch5-6, Ch7-8) |
| Power Consumption (full load) | 300 W |
| Power Ratings | 1% THD @ 120 Vac and 230 Vac |
| Power Supply | UREC™ universal switch-mode PSU with PFC and standby converter |
| Operating Voltage / Frequency | Universal Mains — 100–240 VAC ~ 50/60 Hz |
| Standby Consumption | < 0.6 W |
Audio |
|
| Amplifier Class / Output Circuitry | UMAC™ Class D — full bandwidth PWM modulator with ultra-low distortion |
| Output Voltage | 70Vp / 140Vpp unloaded | Bridged: 140Vp / 280Vpp unloaded |
| Signal-to-Noise Ratio | > 106 dB (A-weighted, 20 Hz–20 kHz, 8Ω load) |
| THD+N (typical) | < 0.05% (20 Hz–20 kHz, 8Ω load, 3 dB below rated power) |
| Frequency Response | 20 Hz–20 kHz (+0 / −0.8 dB, 8Ω load, 3 dB below rated power) |
| Protection Circuits | Short Circuit, DC, Undervoltage, Temperature, Overload |
| Network Audio Protocol | Dante® / AES67 (Audinate®) |
| Dante® Audio Channels | Up to 4 in x 4 out audio channels over standard IP network |
Ports |
|
| Analog Input | 8x RCA (Unbalanced Stereo) 4x 6-pin Phoenix Connectors (Balanced Stereo) |
| Digital Input | 1x Coax |
| Digital Output | 1x Coax |
| Analog Output | 4x 4-pin Phoenix Connector |
| Dante® Audio | 1x RJ45 |
| GPIO | 1x 8-pin Phoenix Connector |
Physical / Dimensions |
|
| Dimensions (H × W × D) | mm: 44 x 440 x 319 |
| Weight | 3.8 kg |
| Rack Format | Full Rack, 1U |
| Operating Temperature | 0 – 40 °C |
* 100V line mode is rated at –1 dB (≈ 90 V). ** PowerShare operates independently across Ch1-2, Ch3-4, Ch5-6, and Ch7-8. |
|
| Specifications subject to change without notice. Mass & dimensions are approximate | |