AMP-8-125 - 8 Channel 125W 8Ω, 4 Channel 70/100V 250W DSP Matrix Amplifier

Description

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)

AMP-8-125 - 8 Channel 125W 8Ω, 4 Channel 70/100V 250W DSP Matrix Amplifier

Product form

  • 4 Sources / 8 Channels
  • 4 Zones
  • Full Matrix
  • Powerful Stereo Output
  • Powerful 70V/100V Output
  • Built-In DSP

SKU: RTI-AMP8-125

  • Shipped today? Order within: Jun 17, 2026 13:00:00 -0500

Description

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)

  • Key Benefits
  • Specs
  • Resources
  • In the Box

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.


Easy configuration via LAN or Wi-Fi.


Free-standing installation or rack-mount (rack-mount kit included).

Analog Sources 8 RCA (Unbalanced Stereo)
8 Phoenix Connector (Balanced Stereo)
Digital Sources 1 Coax
Amplified Zones 4 (8 Channels)
Audio Zone Expansion Daisy-chain multiple AD-8-125 units via Digital In/Out
Amplifier Class D
Output Power @ 4Ω/8Ω 8 x 125W
Output Power @ 70V/100V 4 x 250W
Output Voltage 45 Vrms (S.E), 70/100V (Hi-Z)
Power Share Up to 2 x 250W (across each channel pair)
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 (+/- 0.5 dB, 8Ω load, 3 dB below rated power)
Protection Circuits Short circuit, DC, Undervoltage, Temperature, and Overload protection
RTI or 3rd Party Control IP (RJ45), GPIO (Phoenix Connector)
Power Supply UREC™ universal mains switch mode power supply with Power Factor Correction (PFC) and standby converter
AC Input Voltage 100-240V~, 50/60Hz, 150W
Power Rating 1% THD @ 120VAC and 230VAC
Standby Consumption < 0.5W
Mounting Rack mount or free-standing
Dimensions (W x D x H) 17.35" x 12.6" x 1.75"
440 mm x 320 mm x 44.5 mm
Rack Units 1U
Weight 8.4 lb (3.8 kg)
Operating Temperature +32°F to +104°F (0°C to +40°C)
Warranty Three Years (Parts & Labor)
Prop 65 Declaration This product contains Butadiene which is listed on California's Safe Drinking Water & Toxic Enforcement Act of 1986. This Act, commonly known as Proposition 65 (Prop 65), establishes a list of chemicals which the state of California's risk assessment process has determined to present a risk of cancer, birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov

All features and specifications are subject to change without notice.

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)

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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