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Ashly FA Series FA125.4 4-Channel 125W Compact Class D Power Amplifier

SKU: ASFA1254120V MFR: FA125.4-120V-U
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Key Features

  • Experience robust audio with this Ashly power amplifier, delivering 125W across 4 channels.
  • Achieve pristine sound quality with a low THD, ensuring your audio is clear and distortion-free.
  • Enjoy versatile connectivity with Euroblock inputs/outputs, perfect for custom audio setups.
  • Optimize sound for various speakers using selectable Hi-Z/Low-Z outputs on this power amplifier.
  • Rely on comprehensive protection circuits, guarding against overheating and power surges.
  • Easily integrate into existing systems with selectable input sensitivity (+4dBu/-10dBV) options.
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Special Order?Estimated to Ship: 09/16/2025
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Ashly FA Series Specifications

Configuration

Configuration

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  • Configuration

    Pre-BTL

  • Number of Channels

    4

Output Power

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  • 2 Ohm

    Not Recommended

  • 4 Ohm

    125W

  • 8 Ohm

    125W

  • 16 Ohm

    125W

  • 70V

    125W

  • 100V

    125W

  • Power Sharing

    Yes x 2 (up to 250W)

  • Frequency Response

    20HZ-20kHz

  • S/N Ratio

    >102dB (20Hz20kHz, unweighted)

  • Input Sensitivity

    -10dBV (0.316Vrms)/+4dBu
    (1.228Vrms), Selectable

  • THD + Noise

    < 0.5%

  • Damping Factor

    >250 (8 Ohms < 1kHz)

Power Consumption

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  • Sleep

    <0.5

  • Idle Lo-Z

    15

  • Idle Hi-Z

    25

  • 1/8 Power (4 Ohms)

    104

  • 1/8 Power (8 Ohms)

    96

  • 1/8 Power (70V)

    101

  • 1/8 Power (100V)

    96

Thermal Dissipation

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  • Sleep mode

    <1.7

  • Idle Lo-Z (no signal)

    52

  • Idle Hi-Z (no signal)

    85

  • 1/8 max power, 4 Ohm

    144

  • 1/8 max power, 8 Ohm

    116

  • 1/8 max power, 70V

    133

  • 1/8 max power, 100V

    116

Voltage Gain

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  • Low Z @ -10dBV

    43.1

  • Hi-Z 70V @-10dBV

    46.9

  • Hi-Z 100V @ -10dBV

    49.1

  • Low Z @ +4dBu

    31.3

  • Hi-Z 70V @ +4dBu

    35.1

  • Hi-Z 100V @ +4dBu

    37.3

I/O Features

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  • HPF

    Yes. 80Hz (in HiZ Mode, non-defeatable)

  • Clip Limiter

    Yes (at clip threshold +24dBu, non-defeatable)

Connectors

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  • Input

    Removable Euroblock/Balanced 6-pole (pr)

  • Output

    Removable Euroblock/2-pole (per ch)

  • GPIO

    Removable Euroblock/ 6-pole
    DC volume per channel pair
    Standby, Fault Out

  • USB

    USB-C for Firmware update

DIP Switches

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  • 1

    HiZ/LowZ Ch 1

  • 2

    HiZ/LowZ Ch 2

  • 3

    HiZ/LowZ Ch 3

  • 4

    HiZ/LowZ Ch 4

  • 5

    70/100V

  • 6

    Input Sensitivity (-10/+4dB)

  • 7

    Standby Polarity (NO/NC)

  • 8

    Front Panel Lockout

LEDs/Indicators

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  • Front LED (per channel)

    Green: Signal Present, Yellow: Limit (+24dbu), Red: Mute/Protect

  • Front LED (Main)

    White-On, Blink (0.5Hz)-Standby, Dark-Off

General

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  • Pre-Sleep Mode

    >15 minutes inactivity, all channels muted, wake-on-audio

  • Sleep Mode

    >29 minutes inactivity, power LED blinks ever y two seconds, wake-on-audio

  • Standby Mode

    Contact closure activated, power LED flashes evenly @1Hz

  • Remote Control Options

    WR-1, WR-1.1 DC level control

  • Cooling

    Adaptive Fan Cooling (side to rear venting)

  • Amplifier Protection

    Over-temperature, output DC, output over-power, AC mains voltage, mains fuse

  • Standby Switch

    Soft Switch w/ LED backlight

  • Power Connector

    IEC

  • Attenuators

    Recessed Front panel Input Level (per ch)

  • Power Supply

    100-240VAC, 50-60Hz

  • Minimum Startup Voltage

    85VAC@ 120V nominal, 170VAC@ 240V nominal

  • Environmental

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

  • Safety Compliance

    ULg, CE, FCC Class B, RoHS

Physical

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  • Dimensions (H x W x D)

    1.72 x 8.66 x 13.3" (43.7 x 220 x 338mm)

  • Weight

    5.36 lbs (2.43kg)

  • UPC Code

    694970002548

About Ashly FA Series

Let the FA Series FA125.4 4-Channel 125W Compact Class D Power Amplifier revolutionize your audio experience. This compact powerhouse features front panel input level controls and channel status indicators, providing you with complete control over your sound. With Power On/Standby, Remote GPIO for DC Level Control, Standby & Failure mode status, this amplifier is designed for seamless operation.

This amplifier is equipped with switchable input sensitivity (-10/+4dB), remote standby polarity, and a front panel lockout, ensuring optimal performance. The built-in auto DSP functions, including an 80Hz High-Pass Filter and Clip Limiter, guarantee reliable performance, even in demanding conditions.

The FA Series FA125.4 amplifier boasts a highly efficient Class D design, further enhanced by a Silent Active Cooling System. This ensures minimal heat generation and low energy consumption, thanks to the Auto Sleep/Wake Mode. This feature makes the FA Series the perfect choice for projects requiring high performance without the bulk, heat, and power consumption of traditional amplifiers.

This compact amplifier is designed to fit where others can't - under conference tables, inside kiosks, behind displays, or even mounted on a wall. With the ability to deliver 250-500W in 1/2RU and 1,000W in 1RU, it's ideal for tight-space installations.

The FA Series FA125.4 amplifier comes with a Power Sharing feature, offering unmatched flexibility. This allows one amplifier to replace two, breaking the traditional rules of X-per channel amplifiers. The Multi-mode operation with switchable Low Z (4/8 Ohms) or Hi Z (70/100V) selectable per channel lets you mix and match speaker types as needed.

The FA Series FA125.4 amplifier is equipped with an "under-the-hood" DSP that keeps things under control. An 80Hz High-Pass Filter and Clip Limiter are activated in Hi-Z mode to prevent loud transients from overdriving the amplifier and damaging smaller speakers. A USB port is also included for future DSP updates.

The FA Series FA125.4 amplifier features an Auto ON / OFF function, reducing heat and energy costs. This feature places the amplifier in "sleep" mode after 30 minutes of no audio input signal, and wakes instantaneously when input signal is present. This not only saves on electricity cost but also generates virtually no heat, extending the lifespan of electronic components.

Finally, the FA Series FA125.4 amplifier includes a remote lock-out feature, keeping your settings safe from unauthorized changes. This compact, efficient, and powerful amplifier is the perfect solution for all your audio needs.

Ashly FA Series Features

  • 125W x 4 with Class D power supplies
  • Silent Active Cooling System for noise-free operation
  • Front Status LEDs, power switch and level controls (can be disabled for security)
  • Remote GPIO for DC Level Control, Standby & Failure mode
  • Switchable input sensitivity (-10/+4dB)
  • Remote standby polarity & front panel lockout
  • Built-in auto DSP functions such as 80Hz High-Pass Filter and Clip Limiter
  • 70V and 100V capability
  • Extensive protection circuitry
  • Front panel power switch and level controls (can be disabled for security)
  • USB Port for firmware updates
  • 1U rack kit side-by-side
  • Safety / Compliance: cTUVus, CE, FCC, RoHS

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 robust audio with this Ashly power amplifier, delivering 125W across 4 channels.
  • Achieve pristine sound quality with a low THD, ensuring your audio is clear and distortion-free.
  • Enjoy versatile connectivity with Euroblock inputs/outputs, perfect for custom audio setups.
  • Optimize sound for various speakers using selectable Hi-Z/Low-Z outputs on this power amplifier.
  • Rely on comprehensive protection circuits, guarding against overheating and power surges.
  • Easily integrate into existing systems with selectable input sensitivity (+4dBu/-10dBV) options.

What's in the box:

  • Ashly FA Series FA125.4 4-Channel 125W Compact Class D Power Amplifier
  • IEC Power Cord
  • Set of Euroblock Connectors
  • Rack Mounting Hardware
  • Ashly 5 Year Limited Warranty