Ashly 4-Channel 500W Pema Network Power Amplifier with OPDante Card & Protea DSP Software Suite (Low-Z)

Ashly 4-Channel 500W Pema Network Power Amplifier with OPDante Card & Protea DSP Software Suite (Low-Z)

Ashly 4-Channel 500W Pema Network Power Amplifier with OPDante Card & Protea DSP Software Suite (Low-Z)

B&H # ASPEMA4125D MFR # PEMA 4125D
Ashly 4-Channel 500W Pema Network Power Amplifier with OPDante Card & Protea DSP Software Suite (Low-Z)

Show MoreLess


Now Viewing:

Special Order
Expected availability: 7-10 business days

Channels: 4-Channel

4-Channel 8-Channel

Special Order

This item is noncancelable and nonreturnable.

B&H $500 Gift Card Dash

Share for a chance to win a $500 B&H Gift Card!

Share on Twitter

Share a favorite product for chances to win one of eight $500 B&H Gift Cards!
1 new winner announced every Monday starting Nov 5th!
Limit 1 entry per day: Come back every day to increase your chance of winning.

Be sure to mention #BHWishList when you share!

Congrats to our winners so far:

Next winner: Dec 17th

James Z. (Wk 1)

Ralph H. (Wk 2)

Arturo M. (Wk 3)

Rich P. (Wk 4)

Valeria A. (Wk 5)

Sabrina B. (Wk 6)

Official Rules


NO PURCHASE IS NECESSARY TO ENTER OR WIN. The B&H $500.00 Gift Card Dash (the "Sweepstakes") is void where prohibited by law and is sponsored by B&H Foto & Electronics Corp., 440 Ninth Avenue, New York, NY 10001 ("Sponsor"). It is not sponsored or endorsed by Facebook or Twitter in any way.

Entry Period/Methods of Entry. The Sweepstakes will run from on or about October 28, 2018 until on or about December 23, 2018 (the "Entry Period"). Entries received outside the Entry Period are void. Enter the Sweepstakes via either one of the following methods. (1) Share any product found on the B&H website (the "Website") on Facebook or Twitter via the dedicated links contained on the website using the hashtag #BHWishlist; or (2) Mail a postcard (postmarked during the Entry Period) containing your name, address, phone number, and email address, and indicate the subject(s), if any, about which you are interested in receiving future emails from B&H (e.g. photo, video, audio, computers, home theater, portable entertainment ) (optional) to: B&H $500.00 Gift Card Dash Sweepstakes, c/o B&H Foto & Electronics Corp., 440 Ninth Avenue, New York, NY 10001 (either option, an "Entry"). Entries must not, in the sole and absolute discretion of the Sponsor, contain obscene, provocative, defamatory, sexually explicit, or otherwise objectionable or inappropriate content. Entries deemed by Sponsor to be inappropriate will be disqualified. Entries owned by a third party, or the use of any trademarks, service marks, logos, brands, or products owned by a third party are not acceptable for entry into the Sweepstakes. Limit 1 entry per person, per day.

Winner Selection/Prizes/Odds. The B&H Social Team will randomly select a winner from among all eligible entries every Monday during the Entry Period, for a total eight (8) winners (each a "Winner"). Each Winner will receive a B&H Gift Card pre-valued in the amount of $500.00. No cash or other substitutions will be offered. Winner selection is in the sole and absolute discretion of the B&H Social Team. Any taxes are the sole responsibility of the winner. Winners will be notified and receive their prize at the email address associated with the account to which their Entry was posted or the email account provided with a mail-in entry. The odds of winning depend on the number of eligible entries received.

Identity of Winners/Eligible Participants. Winners will be identified by the email account associated with the Facebook or Twitter account from which their Entry was submitted or the email account provided with a mail-in entry. An email account holder shall mean the natural person assigned to such email account by the internet access or online service provider or other organization responsible for assigning email addresses for the domain associated with such email account. Any issues regarding the identity of a Winner shall be resolved by Sponsor in its sole discretion. The Sweepstakes is only open to residents of the United States that are at least eighteen (18) years of age on their entry date and is not open to employees of Sponsor, their immediate family, any person domiciled with such employees, or any affiliates or subsidiaries of Sponsor.

Entry Ownership/Entrant Agreements. Entrants retain full ownership and copyrights to their Submission. However, by entering the Sweepstakes entrants grant Sponsor permission to use their Entries for promotional purposes on their respective social media channels with proper credit. Entrants also agree: (a) to be bound by these Official B&H $500.00 Gift Card Dash Sweepstakes Rules; (b) that any claims related to this Sweepstakes shall be resolved individually without resort to any form of class action and that awards, shall be limited to actual out-of-pocket costs incurred in entering the Sweepstakes, and shall not include incidental or consequential damages or attorneys fees; and (c) that any actual or perceived ambiguities in these rules shall be interpreted by Sponsor in their sole discretion.

Limitation of Liability/Sponsor Modification/Cancellation Rights/ Choice of Law/ Venue/ Winners List. Sponsor is not responsible for incomplete entries or for failure to receive entries due to technical failures or human error of any kind. Winners agree that Sponsor will have no responsibility for losses or damage of any kind resulting from the acceptance, possession, or use of the prizes. Except where prohibited, participation in the Sweepstakes constitutes entrant's consent to the publication of his or her name by Sponsor in any media for commercial or promotional purposes without limitation or further compensation subject to Sponsor's respective Privacy Policies. Sponsor may modify or discontinue the Sweepstakes at any time and may disqualify from the Sweepstakes any person it determines, in its sole discretion, to have attempted to or actually tampered with or otherwise abused any aspect of the Sweepstakes. Entrants agree that in the unlikely event a dispute arises in connection with this Sweepstakes, it will be governed by the laws of the State of New York and heard exclusively in a court of applicable jurisdiction in the County and State of New York irrespective of any choice of law provisions to the contrary. To receive names of the winners by U.S. mail, please mail a self-addressed stamped envelope to: B&H Foto & Electronics Corp., Attn: B&H $500.00 Gift Card Dash Sweepstakes, 440 Ninth Avenue, New York, NY 10001. Any Winners List request must be received by B&H within one (1) year of the date the Sweepstakes is conducted.

Let us know how to reach you if you win!

Privacy 100% guaranteed; email address for contact purposes only


Already have a B&H account? Just log in tomorrow to enter again!

$0 VA Sales Tax Collected on This Item
Add to Wish List Item in Wish List

Ashly PEMA 4125D overview

  • 1Description

The 4-Channel 500W Pema Network Power Amplifier from Ashly consists of eight inputs and four power amplifier outputs with the ability to assign any input to any output. The amplifier features pre-installed OPDante network audio interface card and the Protea DSP Software Suite. When switched into bridged-mono mode, four powered outputs deliver 75W into an 8 ohm load, 125W into an 4 ohm load, and channel pairs can be bridged for 250W into an 8 ohm load.

The power amplifier includes Euroblock input connectors and Euroblock output connectors. Besides remote standby for power up, DC remote level control, and contact closure preset recall, the amplifier also features Ethernet control, level, mute, polarity, temperature, current, and amplifier over current conditions. The front panel indicates power status, standby, protect, power switch On/Off, signal level, bridge, temperature & current levels, and Ethernet communication. A temperature dependent speed-controlled axial fan shall maintain the correct operating temperature. Full programming and control of the unit is from the rear panel RJ-45 jack connected to a 10/100BASE-T Ethernet LAN connected to a PC running the Protea Software. The amplifier mounts in a standard 19” rack using two spaces (3.5” high).

The power amplifier has an internal factory-installed Digital Signal Processing (DSP) controlled using the Protea Software Suite (network-enabled). Each amplifier input channel can be configured with pluggable DSP blocks to have its own dynamics control, gain functions, graphic and/or parametric EQ, Hi-pass/Lo-pass filters, time delay, metering, and test signal generator. Hot-plug DSP placement allows you to insert any function into any channel block, even when running live audio. A mixer section with assignable routing allows any input to drive any or all amplifier outputs. The matrix mixer also has selectable gain sharing automatic mixing capability. Outputs have the same DSP functions as inputs, with the addition of a quick and automated crossover setup. Up to 30 presets shall be standard and four presets shall be accessible via contact closure using the Protea Software Suite.

Low-Z (4 and 8 ohms)
8x8 DSP matrix with 4-channel power amplifier
OPDante network audio interface
FIR Filter capable
Eight built-in mic preamp outputs
Gain sharing automatic mixing capability
Automatic feedback suppression
Ambient noise compensation
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
Protea DSP software suite
Hot-plug DSP placement
15V phantom power for mic inputs
Full control using software over 10/100BASE-T Ethernet
Automatic DHCP network IP configuration
Euroblock connectors for preset recall, DC remote level control, and serial data control
External control via standard wall remotes, Ethernet wall remotes, Remote iPad app
Level control via variable DC control voltage
Stand-by mode activation via contact closure
Multi-level security
cTUVus, CE, FCC, & RoHS safety/compliance
In the Box
Ashly 4-Channel 500W Pema Network Power Amplifier with OPDante Card & Protea DSP Software Suite (Low-Z)
  • Limited 5-Year Warranty
  • Table of Contents
    • 1Description

    Ashly PEMA 4125D specs

    Frequency Response 20 Hz to 20 kHz, +/-1 dB
    Input Sensitivity 3.2 dBu
    Voltage Gain 26 dB
    Damping Factor > 250 (8 ohms load, < 1 kHz)
    Distortion < 0.5% (SMPTE, typical)
    < 0.5% (THD-N, typical, 8 Ohms, 10 dB below rated power, 20 Hz to 20 kHz
    Channel Separation -80 dB (dB from full output, 1 kHz)
    Input Impedance Mic/Line: 4.8 kOhms
    Maximum Input Level Mic/Line: +21 dBu
    Gain Preamp Mic/Line: 0, +20 dB, +40 dB, +60 dB
    Phantom Power Mic/Line: +15 V, switchable channel 1 to 4, 5 to 8
    Mono EQ Summed: 3.16 kOhms (input impedance)
    +11 dBu (maximum input level)
    Input Channel 1 TEL-PBX: 3.9 kOhms (input impedance), +21 dBu (maximum input level)
    Output Level Preamp Maximum Level: +8 dBu
    Aux Maximum Level: +20 dBu
    Controls Ethernet 10/100, Channel 1 TEL-PBX switch, Remote standby, Preset recall (4), Remote Level (8), Remote Data
    Connectors Input/Output: Euroblock (each channel)
    Audio Connections 1 x Euro connector balanced input, selectable for Mic, Line or TEL-PBX
    7 x Euro connector balanced inputs, software selectable for Mic or Line
    8 x pairs of unbalanced, summed mono RCA connectors optimized for consumer line level (-10 dBV nominal) devices
    8 x Euro connector Preamp/Aux outputs
    4 x Euro connector speaker outputs
    Required AC Mains 120 VAC or 240 VAC, ±10% 50 to 60Hz
    Power Cable Connector: 15 A Edison, 3-Prong IEC
    Signal to Noise Ratio > 102 dB (20 Hz to 20 kHz, unweighted)
    LED Indicators Signal Level
    Red: Clip/Mute
    Yellow: -6 dB
    Green: -18 dB, -12 dB

    Bridge: Green per channel pair
    Temperature: Yellow per channel
    Current: Green per channel (proportional to output)
    Output Continuous Average Power
    4 Ohms: 125 W
    8 Ohms: 75 W

    Bridge Mode
    8 Ohms: 250 W
    Current Draw Standby Mode: 190 mA
    Idle (No Signal): 590 mA
    Typical (1/8 Power Pink Noise): 1.70 A
    Maximum (1/3 Power Pink Noise): 3.27 A
    Thermal Dissipation Standby Mode: 46.7 BTU/hr
    Idle (No Signal): 123 BTU/hr
    Typical (1/8 Power Pink Noise): 232 BTU/hr
    Maximum (1/3 Power Pink Noise): 251 BTU/hr
    Environmental 40 to 120°F (4 to 49°C) non-condensing
    Airflow In through sides, Out through front
    Dimensions (W x H x D) 19 x 3.5 x 16.8" (48.3 x 8.9 x 42.6 cm)
    Weight 23.5 lb (10.7 kg)
    Input Source Input Source Select Options: Analog, Auto (Net, AES3, Analog)
    Limiter Brick Wall Limiter
    Threshold: -20 to +20 dBu
    Ratio: Infinite
    Attack: 0.2 to 50 ms/dB
    Release: 5 to 1000 ms/dB
    Compressor Threshold: -20 to +20 dBu
    Ratio: 1.2:1 to infinite
    Attack: 0.2 to 50 ms
    Release: 5 to 1000 ms/dB
    Detector: Peak/average
    Attenuation Bus: 2 available
    Metering: In, Out, Attenuation, Graphical
    Controls Target Level: -40 to +20 dBu
    Action: Gentle, normal, aggressive, user-defined
    Maximum Gain: 0 to +22 dB
    Metering: Input Level, Gain, Attenuation
    Ratio: 1.2:1 to 10:1
    Threshold Below Target: -30 to 0 dB
    Gain Increase/Decrease Rate: 5 to 1000 ms/dB
    Hold Time: 0 to 6 sec
    Ambient Noise Compensation Maximum Gain: -20 to +20 dB
    Minimum/Base Gain: -40 to +20 dB
    Gain Change Rate: 0.2 to 20 s/dB
    Link Group: 16 available>ANC Input Channel: 1-4 or 1-8
    Noise Threshold: -40 to +20 dBu
    Program/Ambient Gain Ratio: 0.3:1 to 3:1
    Metering: Input level, Attenuation, Average noise
    Ducking High/Low Priority, Trigger, Filibuster, Ducked Program
    Trigger Threshold: -80 to +20 dBu
    Ducking Release: 5 to 1000 ms/dB
    Ducking Depth: 0 to -30 dB, -∞
    Enable Ducking at Matrix Mixer: Yes
    Metering: Input
    Gate Threshold: -80 to +20 dBu
    Range: off, 100 to 0 dB
    Attack: 0.2 to 50 ms/dB
    Release: 5 to 1000 ms/dB
    Metering: Key Signal, Gate LED, Graphical
    Advanced Gate Controls
    Key Engage Enable: Yes
    Key Frequency: 20 Hz to 20 kHz
    Key Bandwidth: 0.016 to 3.995 octave
    Gain Gain (with/without VCA): -50 to +12 dB, off, polarity invert
    Digital VCA Groups: 4 available
    Remote RD8C Gain: Enable per channel, 0 dB to -∞
    WR-5 (neWR-5) Remote Gain: 0 to -50 dB, mute
    EQ Controls FIR Filter
    File Type: .csv, .fir
    Filter Type: Constant Q or proportional Q
    Bandwidth: 0.499 to 0.25 oct
    Parametric 2,4,6, or 10 Band
    Frequency: 20 to 20 kHz
    Level: -30 to +15 dB
    Q Value: 0.016 to 3.995 Octave
    Hi/Low Shelf 6/12 dB/oct
    Frequency: 20 Hz to 20 kHz
    Level: -15 to +15 dB
    All Pass
    Frequency: 20 Hz to 20 kHz
    Variable Q HP/LP
    Frequency: 20 Hz to 20 kHz
    Q Value: 3.047 to 0.267
    Frequency: 20 Hz to 20 kHz
    Q Value: 92.436 to 0.267
    Feedback Feedback Suppressor: Only available w/ 48 kHz sampling rate (inputs only)
    Filters: 12
    In/Out per filter: Yes
    Filter Modes: Float, Restricted, Manual
    Filter Type: Notch, Parametric
    Filter Frequency Range: 20 Hz to 20 kHz
    Parametric Filter Level: +15 to -30 dB
    Filter Bandwidth: 0.016 to 3.995 Octave
    Detector Sensitivity: 5 levels
    Float Time: 5 minutes to 24 hours
    Crossover 2 Way, 3 Way, 4 Way Crossover & High-Pass/Low-Pass Filters
    Bessel & Butterworth Filters: 12/18/24/48 dB/oct
    Linkwitz-Riley Filter: 12/24/48 dB/oct
    Frequency:Off, 20 Hz to 20 kHz
    Delay @ 48 kHz Sampling Rate (Input Time, Distance & Temperature)
    Speaker Delay: 0 to 21 ms
    Delay: 0 to 682 ms
    @ 96 kHz Sampling Rate (Input Time, Distance & Temperature)
    Speaker Delay: 0 to 10.6 ms
    Delay: 0 to 341 ms
    Audio Metering Range: -60 to +20 dBu
    Increments: 1 dB
    Peak Hold Indicator: Yes
    Signal Generator Pink noise, White noise, Sine wave
    Signal Level: Off, -50 to +20 dBu
    Sine Wave Frequency: 20 Hz to 12 kHz
    Mixer Gain (0.5 dB increments): Off, -50 to +12 dB
    Mute: Per channel
    Auto-Mixer: Per channel
    Global Auto-mixer Response: 0.01 to 2 sec
    Enable Ducking at Mixer: Yes
    Ducking LED: Per channel if enabled
    Metering: Level, auto-mixer level
    Processors Input A/D, Output D/A: 24-bit
    DSP Processors: 32-bit floating point
    Sample Rates: 48 and 96 kHz
    Propagation Delay: 1.42 ms @ 48 kHz & 1.71 ms @ 96 kHz

    Ashly PEMA 4125D reviews

    Be the first to review this item

    Ashly PEMA 4125D Q&A

    Ashly PEMA 4125D accessories