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Ashly FX Series FX125.4 4-Channel 125W Compact Class D Power Amplifier with DSP

SKU: ASFX1254120V MFR: FX125.4-120V-U
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Key Features

  • Experience superior audio clarity with this power amplifier's high signal-to-noise ratio.
  • This 4-channel power amplifier delivers 125W per channel, perfect for multi-zone audio.
  • Achieve pristine sound with <0.05% THD, ensuring your audio is clear and distortion-free.
  • Benefit from reliable thermal protection, keeping your power amplifier safe during operation.
  • Enjoy input/output flexibility, making this power amplifier ideal for diverse audio setups.
  • Its compact form factor allows for easy integration into any rack or audio setup.
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Special Order?Estimated to Ship: 08/16/2025
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Ashly FX Series Specifications

  • Channels

    4x Lo-Z / 2x Hi-Z

  • Output power @ 4 Ohm/8 Ohm

    4x 125 W

  • Output power @ 25V

    4x 125 W

  • Output power @ 70V/100V

    2x 250 W

  • Powershare (up to)

    2x 250 W

  • Total System Power

    500 W

  • DSP

    4 Input x 2 or 4 Outputs: Input, Zone, Output & Speaker Processing, plus General settings

  • Networking

    Browser-based UI Software with Ethernet & Wi-Fi connectivity

  • Power Consumption

    150 W

  • Output Circuitry

    Class D - full bandwidth PWM modulator with ultra-low distortion

  • Output Voltage

    70 Vp / 140 Vpp (unloaded) // Bridged 140 Vp / 280 Vpp (unloaded)

  • Signal To Noise-Ratio

    > 106 dB (A-weighted, 20 Hz - 20 kHz, 8 Ohm load)

  • THD+N (typical)

    < 0.05% (20 Hz - 20 kHz, 8 Ohm load, 3 dB below rated power)

  • Frequency Response

    20 Hz - 20 kHz (+/- 0.5 dB, 8 Ohm load, 3 dB below rated power)

  • Protection Circuits

    Short circuit, DC, Under voltage, Temperature and Overload protection

  • Power Supply

    Universal mains switch mode power supply with Power Factor Correction (PFC) and standby converter

  • Operating temperature

    32 - 104 Degree F (0 - 40 Degree C)

  • Operating Voltage / Frequency

    Universal Mains, 100V - 240V, 50Hz - 60Hz

  • Standby Consumption

    < 0.5 W

  • Power Ratings

    1 % THD @ 120 Vac and 230 Vac

  • Dimensions

    1.75 x 8.66 x 11.65" (44.5 x 220 x 296mm)

  • Weight

    6.2 lbs (2.8kg)

  • UPC Code

    801128003634

About Ashly FX Series

After years of refining Class D design and providing user-friendly software, Ashly presents the FX Series FX125.4 4-Channel 125W Compact Class D Power Amplifier with DSP. This advanced piece of audio equipment takes amplification to new heights, combining power, versatility, and innovation in one compact package.

The FX Series FX125.4 is a networkable amplifier, offering both Ethernet and built-in Wi-Fi hotspot connectivity. This eliminates the need for a network router and allows for easy system configurations without the need for additional equipment like stand-alone DSP or speaker system processors.

This multi-purpose installation DSP-equipped amplifier is part of the FX series, known for its built-in Wireless-Access-Point (WAP) for simple connection and configuration via Wi-Fi. It also features an intuitive web-based software user interface. The FX125.4 comes in two configurations: 1/2 Rack Units (RU) for compact spaces and 2 RU for larger systems, making it a versatile choice for various audio setups.

Underneath its sleek exterior, the FX Series FX125.4 boasts a powerful DSP engine that can be tailored to a wide array of tasks. It offers comprehensive input, zone, output, and speaker processing, making it capable of handling diverse applications such as multi-zone music distribution for retail and restaurants, noise masking for offices and medical facilities, and media playback for hotel lobbies, retail, and museum kiosks.

The FX DSP engine provides a rich selection of functions for optimizing your system, including status display, level control and metering for Zones A-D, gain/trim, sensitivity, source select, mono/stereo, level control & metering, GPIO assignment, compressor for Zones A-D, and more.

The FX Series FX125.4 also features an intuitive software user interface that offers an easy-to-navigate workflow and quick access to advanced functions. It allows you to create, save, and load speaker presets to accommodate virtually any loudspeaker, making it a versatile choice for different zones or satellites and subs in a bar or auditorium.

The FX Series FX125.4 offers wireless access, allowing you to view and control the amplifier from virtually any PC, tablet, or smartphone. Its browser-based network interface also makes remote service and troubleshooting easier, as a technician can log in with remote access from their device without needing to download or install any software.

The FX Series FX125.4 also offers flexible amp modes, with switchable Low Z (4/8 Ohms) or Hi Z (25/70/100V) that can be selected in software. This allows you to mix and match speaker types as needed. The amplifier also offers convenient power-sharing technology that balances power between channels to meet different load requirements.

In conclusion, the FX Series FX125.4 4-Channel 125W Compact Class D Power Amplifier with DSP is a powerful, versatile, and innovative solution for your audio needs, offering advanced features and functionality in a compact and user-friendly package.

Ashly FX Series Features

  • Low (4/8 Ohm) or Hi Impedance (70/100V) operation, selectable in software
  • Balanced Mic/Line inputs on removable Euroblock connectors, plus unbalanced RCA inputs
  • 2-channel SPDIF Digital IO
  • Front panel status LEDs for amp, Input, output & network
  • Networkable via Ethernet or built-in Wi-Fi
  • Built-in advanced DSP on all inputs & outputs, including: Sensitivity, Routing, Gain, PEQ, Compressor, Limiter, FIR Filters, X-Over, Polarity & Delay
  • Browser-based UI accessed via PC or mobile device. No software to install
  • Auto/Manual Power Saver Mode (sleep/standby), adjustable in Software
  • Customized Speaker Presets made be created, saved & loaded for each output channel
  • Addressable GPIO, Standby/Mute & VC remote ports. VC assignable per channel via software
  • Highly efficient Class D and lightweight

Warranty Information

This product has a limited warranty of 60 months for parts and 60 months for labor.

Product Documents

User Manual

Key Features

  • Experience superior audio clarity with this power amplifier's high signal-to-noise ratio.
  • This 4-channel power amplifier delivers 125W per channel, perfect for multi-zone audio.
  • Achieve pristine sound with <0.05% THD, ensuring your audio is clear and distortion-free.
  • Benefit from reliable thermal protection, keeping your power amplifier safe during operation.
  • Enjoy input/output flexibility, making this power amplifier ideal for diverse audio setups.
  • Its compact form factor allows for easy integration into any rack or audio setup.

What's in the box:

  • Ashly FX Series FX125.4 4-Channel 125W Compact Class D Power Amplifier
  • IEC Power Cord
  • 2x 6-Pin Input Block Connectors
  • 8-Pin GPIO Block Connector
  • 2x 4-Pin Speaker Output Block Connector
  • 4x Adhesive Rubber Feet
  • Ashly 5 Year Limited Warranty