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Ashly PEMA 4125 4-Channel Amplifier with Protea DSP and OPDante Option Card

SKU: ASPEMA4125D MFR: PEMA4125D
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Key Features

  • Experience pristine audio with the Ashly PEMA 4125's professional sound quality.
  • This 4-channel amplifier delivers reliable power output for installed sound systems.
  • Utilize the Protea DSP for precise audio shaping and customized soundscapes.
  • Integrate seamlessly with Dante Digital I/O for networked audio applications.
  • Enjoy versatile connectivity with Euroblock inputs and flexible output options.
  • Optimize your sound with advanced gate controls and ambient noise compensation.
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Special Order?Estimated to Ship: 08/11/2025
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Ashly PEMA 4125 Specifications

Channels

Channels

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  • Channels

    4

  • Power Output

    4 Ohm: 125W
    8 Ohms: 75W
    (Continuous Average Power: Output Per Channel, Low Z Models, Stereo Mode, 20Hz-20kHz, 1%THD, All Channels Driven)

    8 Ohm: 250W (Low Z Output: Bridge Mode, 20Hz-20kHz, 1% THD, All Channels Driven)

Line Current Draw

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  • Standby Mode

    190mA

  • Idle (no signal)

    590mA

  • Typical

    1.70A (1/8 Max Power, Pink Noise, All Channels Driven)

  • Maximum

    3.27A (1/3 power pink noise)

Thermal Dissipation

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  • Standby Mode

    46.7 BTU/hr

  • Idle (no signal)

    123 BTU/hr

  • Typical

    232 BTU/hr (1/8 Max power, pink noise, All Channels Driven)

  • Maximum

    251 BTU/hr(1/3 Max power, sine Wave, All Channels Driven)

Signal to Noise

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  • Signal to Noise

    >102dB (20Hz-20kHz, Unweighted)

General

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  • Input Sensitivity

    3.2dBu

  • Voltage Gain

    26dB

  • Damping Factor

    >250 (8 Ohm load, <1kHz)

  • Distortion

    <0.5% (SMPTE, typical)
    <0.5% (THD-N, typical, 8 Ohm, 10dB below rated power, 20Hz-20kHz)

  • Channel Separation

    -80dB (dB from full output, 1kHz)

  • Frequency Response

    20Hz-20kHz, +/-1dB

  • Mic/Line Input Impedance

    4.8k Ohms

  • Mic/Line Maximum Input Level

    +21dBu

  • Mic/Line Preamp Gain

    0, +20dB, +40dB, +60dB

  • Mic/Line Phantom Power

    +15V, switchable Channel 1-4, 5-8

  • Summed Mono

    3.16k Ohm (Input Impedance)
    +11dBu (Maximum Input Level)

  • Channel 1 TEL-PBX

    3.9k Ohm (Input Impedance)
    +21dBu (Maximum Input Level)

  • Preamp Output Maximum Level

    +8dBu

  • AUX Output Maximum Level

    +20dBu

Rear Panel

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  • Controls

    Ethernet 10/100, Channel 1 TEL-PBX Switch, Remote Standby, Preset Recall (4), Remote Level (8), Remote Data

  • Connectors (each channel)

    Input: Euroblock
    Output: Euroblock

LED Indicators

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  • Unit Status

    Power: Switch: On, Off (Blue)
    Standby: Standby, flashing (Yellow)
    Protect: On, Off (Red)
    Disable: On, Off (Yellow)
    COM: On, for Ethernet data or Device ID (Green)

  • Each Channel

    Signal level: Clip/Mute (Red); -6dB (Yellow) and -18dB, -12dB (Green)
    Bridge: Per Channel Pair (Green)
    Temp: Per Channel (Yellow)
    Current: Per Channel: Proportional to output (Green)

Connections

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  • Audio Connections

    1 Euro connector balanced input, selectable for Mic, Line or TEL-PBX
    7 Euro connector balanced inputs, software selectable for Mic or Line
    8 pairs of unbalanced, summed mono RCA connectors optimized for consumer line level (-10dBu) devices
    8 Euro connector Preamp/Aux outputs
    4 or 8 Euro connector speaker outputs
    Dante Digital I/O options

Power Requirement

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  • AC Mains

    120VAC or 240VAC, +/-10% 50-60Hz

  • Power Cable Connector

    15A Edison, 3-Prong IEC

Environmental

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  • Environmental

    40 to 120 degree F (4 to 49 degree C) noncondensing

DSP: Input Source Selection

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  • Input Source Selection Options

    Analog, Auto (Net, AES3, Analog)

DSP: Brick Wall Limiter

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  • Threshold

    -20dBu to +20dBu

  • Ratio

    infinity

  • Attack

    0.2ms/dB to 50 ms/dB

  • Release

    5ms/dB to 1000ms/dB

DSP: Compressor

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  • Threshold

    -20dBu to +20dBu

  • Ratio

    1.2:1 to infinity

  • Attack

    0.2 to 50ms

  • Release

    5ms/dB to 1000ms/dB

  • Detector

    Peak/Average

  • Attenuation Bus

    2 available

  • Metering

    In, Out, Attenuation, Graphical

DSP: Autoleveler Controls

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  • Target Level

    -40dBu to +20dBu

  • Action

    Gentle, normal, aggressive, user-defined

  • Maximum Gain

    0dB to +22dB

  • Metering

    Input Level, Gain, Attenuation

  • Ratio

    1.2:1 to 10:1

  • Threshold Below Target

    -30dB to 0dB

  • Gain Increase/Decrease Rate

    5ms/dB to 1000ms/dB

  • Hold Time

    0-6 sec

DSP: Ambient Noise Compensation (Output)

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  • Max Gain

    -20dB to +20dB

  • Min/Base Gain

    -40dB to -1dB

  • Gain Change Rate

    0.2s/dB to 20s/dB

  • Link Group

    16 available

  • ANC Input Channel

    1-4 or 1-8

  • Noise Threshold

    -40dBu to +20dBu

  • Program/Ambient Gain Ratio

    0.3:1 to 3:1

  • Metering

    Input level, Attenuation, Average noise

DSP: Ducking

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  • Trigger Threshold

    -80dBu to +20 dBu

  • Ducking Release

    5ms/dB to 1000ms/dB

  • Ducking Depth

    0dB to -30dB, infinity

  • Enable Ducking at Matrix Mixer

    Yes

  • Metering

    Input

DSP: Gate

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  • Threshold

    -80dBu to +20dBu

  • Range

    off, 100dB to 0dB

  • Attack

    0.2ms/dB to 50 ms/dB

  • Release

    5ms/dB to 1000ms/dB

  • Metering

    Key Signal, Gate LED, Graphical

DSP: Advanced Gate Controls

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  • Key Engage Enable

    Yes

  • Key Frequency

    20Hz to 20kHz

  • Key Bandwidth

    0.016 to 3.995 Octave

DSP: Gain

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  • Gain (with/without VCA)

    -50dB to +12dB, off, polarity invert

  • Digital VCA Groups

    4 available

  • Remote RD8C Gain

    Enable per channel, 0dB to infinity

  • WR-5 (neWR-5) Remote Gain

    0 to -50dB, Mute

DSP: EQ (31-Band)

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  • Filter Type

    Constant Q or Proportional

  • Bandwidth

    0.499oct to 0.25oct

DSP: EQ (Parametric 2,4,6, or 10 Band)

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  • Frequency

    20-20kHz

  • Level

    -30dB to +15dB

  • Q Value

    0.016 to 3.995 Octave

DSP: EQ (Hi/Low Shelf 6/12 dB/oct)

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  • Frequency

    20Hz-20kHz

  • Level

    -15dB to +15dB

DSP: EQ (All Pass)

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  • Frequency

    20Hz-20kHz

DSP: EQ (Variable Q HP/LP)

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  • Frequency

    20Hz-20kHz

  • Q Value

    3.047 to 0.267

DSP: EQ (Notch/Bandpass)

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  • Frequency

    20Hz-20kHz

  • Q Value

    92.436 to 0.267

DSP: Feedback Suppressor (Input Only)

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  • Filters

    12

  • In/Out per filter

    Yes

  • Lock per filter and global lock

    Yes

  • Filter Modes

    Float, Restricted, Manual

  • Filter Type

    Notch, Parametric

  • Filter Frequency Range

    20Hz to 20kHz

  • Notch Filter

    Infinity

  • Parametric Filter

    +15dB to -30dB

  • Filter Bandwidth

    0.016 to 3.995 Octave

  • Detector Sensitivity

    5 levels

  • Float Time

    5 min to 24 hours

DSP: Crossover (2 /3/4 Way Crossover)

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  • Bessel & Butterworth Filters

    12/18/24/48 dB/oct

  • Linkwitz-Riley Filter

    12/24/48 dB/oct

  • Frequency

    Off, 20Hz-20KHz

DSP: Delay (@ 48kHz Sampling Rate)

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  • Speaker Delay

    0-21ms

  • Delay

    0-682ms

DSP: Delay (@ 96kHz Sampling Rate)

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  • Speaker Delay

    0-10.6ms

  • Delay

    0-341ms

DSP: Audio Metering Tool

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  • Range

    -60dBu to +20dBu

  • Increments

    1dB

  • Peak Hold Indicator

    Yes

DSP: Signal Generator Tool

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  • Signal Level

    Off, -50dBu to +20dBu

  • Sine Wave Frequency

    20Hz-12kHz

DSP: Matrix Mixer

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  • Gain (0.5dB increments)

    Off, -50dB to +12dB

  • Mute

    Per channel

  • Auto-Mixer Enabled

    Per channel

  • Global Auto-mixer Response

    0.01sec to 2sec

  • Enable Ducking at Mixer

    Yes

  • Ducking LED

    Per channel if enabled

  • Metering

    Level, auto-mixer level

DSP: Processors

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  • Input A/D, Output D/A

    24 bit

  • DSP Processors

    32-bit floating point

  • Sample Rates

    48kHz, 96kHz

  • Propagation Delay @ 48kHz:

    1.42ms

  • Propagation Delay @ 96kHz:

    0.71ms

Physical

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  • Dimensions (W x H x D)

    19 x 3.5 x 15.5" (483 x 89 x 394mm)

  • Weight

    18.5 lb (8.4kg)

About Ashly PEMA 4125

Experience the pinnacle of audio amplification with the PEMA 4125 4-Channel Amplifier, a powerful and high-quality solution for professional sound systems. This advanced amplifier is engineered with a built-in Protea Digital Signal Processor (DSP) and an optional OPDante network audio card, offering unparalleled versatility and control for audio professionals.

The PEMA 4125 stands out with its innovative design, combining robust DSP functionality and high-performance amplifier technology within a compact two-rack space unit. This integration not only reduces overall system costs but also minimizes space requirements, enhances energy efficiency, and streamlines both installation and programming processes.

Equipped with four and eight amplifier channel versions, the PEMA 4125 delivers 125 and 250 Watts per channel, ensuring powerful and clear audio output for a variety of applications. The full 96kHz performance on 32-bit SHARC processors guarantees utterly transparent audio, setting a new benchmark for sound quality.

This durable network audio amplifier is the ideal choice for those seeking a seamless integration into larger audio systems with remote control capabilities. It simplifies the audio setup with fewer cables, reduced rack space, and quicker installation times, all while utilizing proven DSP and amplifier technology that impresses clients with its simplicity and reliability.

The PEMA 4125 boasts advanced DSP algorithms, including ambient noise compensation, automatic feedback suppression, and a comprehensive array of filters, EQs, delays, and more. Amplifier functionality is also DSP-controlled, offering bridge-mode operation, high-pass filter settings for constant voltage systems, stereo-linking of channel pairs, and full-range remote-gain control capability.

The amplifier's input/output count and formats are perfectly suited for small to mid-sized installations. Each model features eight balanced input channels, software-selectable for mic or line levels, with the first channel also set for a transformer isolated TEL-PBX level. Additionally, eight pairs of summed-mono RCA connectors are optimized for consumer line-level devices.

Eight preamp auxiliary outputs allow for flexible signal routing from the matrix mixer to any part of the system. The PEMA 4125 is remarkably easy to program and deploy, thanks to the Protea ne Software and standard 10/100 Ethernet protocol. Hot-plug DSP placement and automatic DHCP network IP configuration further reduce setup time.

Lockable front panel controls and multi-level software security with password access ensure a secure and tamper-proof audio system. The PEMA 4125 is designed to meet the rigorous demands of architects and engineers, providing a sophisticated and transparent audio solution that is both easy to manage and exceptionally reliable.

With the PEMA 4125 4-Channel Amplifier, experience the future of sound system design, where power, innovation, and advanced technology come together to create an audio experience that is second to none.

Ashly PEMA 4125 Features

  • OPDante network audio fully supported
  • 8-in x 8-out sophisticated matrix mixing
  • 8 built-in mic pre's
  • Gain sharing automatic microphone mixing (Automixer)
  • Automatic feedback suppression
  • Ambient noise compensation
  • Dedicated telephone/PBX input
  • Dual RCA and balanced euroblock inputs
  • Post DSP AUX line level outputs
  • Stereo summed to mono
  • Event scheduling (RTC)
  • Adjustable HP/LP filters
  • Built-in pink/white noise & sine wave generator
  • Full suite of Ashly Protea DSP
  • Hot-plug DSP placement
  • 96kHz or 48kHz sample rate
  • 32-Bit SHARC DSP
  • 24-Bit A/D-D/A audio resolution
  • 15V phantom power for mic inputs
  • Full control using Ashly software over 10/100 baseT Ethernet
  • Easy and intuitive user interface
  • Automatic DHCP network IP configuration
  • Euroblock connectors for preset recall, DC remote level control and serial data control
  • External control via Ashly standard wall remotes, Ashly Ethernet wall remotes or Ashly Remote iPad App
  • Level control via variable DC control voltage
  • Stand-By mode activation via contact closure
  • Multi-level Security
  • Safety/Compliance: TUV, CE, FCC, RoHS

Warranty Information

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

Key Features

  • Experience pristine audio with the Ashly PEMA 4125's professional sound quality.
  • This 4-channel amplifier delivers reliable power output for installed sound systems.
  • Utilize the Protea DSP for precise audio shaping and customized soundscapes.
  • Integrate seamlessly with Dante Digital I/O for networked audio applications.
  • Enjoy versatile connectivity with Euroblock inputs and flexible output options.
  • Optimize your sound with advanced gate controls and ambient noise compensation.

What's in the box:

  • PEMA 4125 4-Channel Amplifier
  • Ashly 5 Year Limited Warranty