RTI-AMP-2-125 - 2 Channel 125W 8Ω, 1 Channel 70/100V 250W DSP Matrix Amplifier

Description

The RTI Commercial Amplifier Series delivers configurable, consistent, and reliable high-performance audio amplification for commercial, residential, and entertainment applications. Built around UMAC™ Class D output circuitry and a UREC™ universal switch-mode power supply with power factor correction, every model in the series operates equally well driving conventional low-impedance (Lo-Z, 4Ω/8Ω) loudspeakers and high-impedance (Hi-Z, 70V/100V) transformer-coupled distributed audio systems with no external transformer required.

For setup, configuration is handled entirely through a browser-based interface accessible over wired Ethernet or built-in Wi-Fi, with no dedicated software required. Installers have granular control over inputs, output zones, per-channel EQ, FIR speaker presets, signal routing, and GPIO-based external control from any networked device. Dante/AES67 support with network audio transport, enabling seamless integration into professional IP audio ecosystems.

RTI-AMP-2-125 - 2 Channel 125W 8Ω, 1 Channel 70/100V 250W DSP Matrix Amplifier

Product form

Commercial-grade DSP matrix amplification - Lo-Z and Hi-Z, 2 channels, compact 1U design.

  • 2 Sources / 2 Channels
  • 2 Zones
  • Full Matrix
  • Powerful Stereo Output
  • Powerful 70V/100V Output
  • Built-In DSP

SKU: RTI-AMP-2-125

  • Shipped today? Order within: Aug 14, 2026 13:00:00 -0500

Description

The RTI Commercial Amplifier Series delivers configurable, consistent, and reliable high-performance audio amplification for commercial, residential, and entertainment applications. Built around UMAC™ Class D output circuitry and a UREC™ universal switch-mode power supply with power factor correction, every model in the series operates equally well driving conventional low-impedance (Lo-Z, 4Ω/8Ω) loudspeakers and high-impedance (Hi-Z, 70V/100V) transformer-coupled distributed audio systems with no external transformer required.

For setup, configuration is handled entirely through a browser-based interface accessible over wired Ethernet or built-in Wi-Fi, with no dedicated software required. Installers have granular control over inputs, output zones, per-channel EQ, FIR speaker presets, signal routing, and GPIO-based external control from any networked device. Dante/AES67 support with network audio transport, enabling seamless integration into professional IP audio ecosystems.

  • Key Benefits
  • Specs
  • Resources
  • In the Box

UMAC™ Class D Amplification
Delivers ultra-low distortion, full-bandwidth <0.05% THD+N and >106dB SNR. Professional audio quality at commercial scale, with high efficiency that reduces heat load and operating cost. 

PowerShare Technology

Unused headroom from idle channels is redistributed to active channels in real time, maximizing amplifier utilization without upsizing the unit or adding hardware.

 

Browser-Based Control Web App

Installers configure inputs, zones, EQ, speaker presets, and GPIO via any web browser over Ethernet or Wi-Fi,  no proprietary software, no dedicated laptop, no return trips.

 

Dual-Mode Lo-Z and Hi-Z Output

One unit drives both 4Ω/8Ω speakers and 70V/100V distributed systems, eliminating the need for external transformers or separate product SKUs across mixed-topology projects. 125W per channel Lo-Z (4Ω/8Ω) and Hi-Z (70V/100V) - no external transformer required.

 

Per-Output Speaker Presets

FIR, parametric EQ, crossover, delay, limiter, polarity. Eliminates external speaker processors for most installs. Presets can be locked, exported, and shared across projects, reducing commissioning time and ensuring consistent tuning.

 

GPIO Interface

Physical volume, standby, mute, and 12V trigger. Enables wall-volume controls and building-automation integration without a full control system, expanding deployment options for budget-conscious commercial installations.

Power
Total System Power250 W
Output Power — Lo-Z (4Ω/8Ω)2 x 125 W (4Ω / 8Ω)
Output Power — Hi-Z (70V/100V)1 x 250 W (70V / 100V*)
PowerShare (up to)1 x 250 W (across all channels)
Power Consumption (full load)75 W
Power Ratings1% THD @ 120 Vac and 230 Vac
Power SupplyUREC™ universal switch-mode PSU with PFC and standby converter
Operating Voltage / FrequencyUniversal Mains — 100–240 VAC ~ 50/60 Hz
Standby Consumption< 0.6 W
Audio
Amplifier Class / Output CircuitryUMAC™ Class D — full bandwidth PWM modulator with ultra-low distortion
Output Voltage70Vp / 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 Response20 Hz–20 kHz  (+0 / −0.8 dB, 8Ω load, 3 dB below rated power)
Protection CircuitsShort Circuit, DC, Undervoltage, Temperature, Overload
Ports
Analog Input4x RCA (Unbalanced Stereo)
4x 6-pin Pheonix Connectors (Balanced Stereo)
Digital Input1x Coax
Digital Output1x Coax
Analog Output1x 4-pin Pheonix Connector
Control
IP1x RJ45
GPIO1x 8-pin Pheonix Connector
Physical / Dimensions
Dimensions (H × W × D)mm: 44 x 220 x 213
inches: 1.7 x 8.7 x 8.4
Weight2.0 kg  (4.4 lbs)
Rack Format½ Rack, 1U
Operating Temperature0 – 40 °C  (32 – 104 °F)
Product Warranty3 Years
* 100V line mode is rated at –1 dB (≈ 90 V)
Specifications subject to change without notice.  Mass & dimensions are approximate

 

Included in the box:
 

  • RTI-AMP-2-125
  • Power Cord
  • 6-pin Phoenix Input Connectors (2)
  • 4-pin Phoenix Output Connector (1)
  • 8-pin Phoenix GPIO Socket Connector (1)
  • Adhesive Rubber Feet (4)

WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer.
​For more information, go to www.P65Warnings.ca.gov.

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