2x250W @ 4Ω or 1 x 500W @ 8Ω DSP plate amplifier, Powered by ICEpower® 250ASX2 module, Ethernet control, FIR + IIR filter
405 USD
PWR-ICE Backbox version Tooltip
  • Description
  • Specifications
  • Support
  • Application Notes
  • Reviews

Introducing the PWR-ICE250, a DSP powered plate amplifier module for active 2 way loudspeakers or mono subwoofers. Result of the collaborative effort of two innovative technology companies, the PWR-ICE250 core features include:

  • On the processing side is miniDSP's innovative software & firmware allowing a Plug & Play real time control of the onboard DSP over Ethernet/Wifi networks. Using our Zero Conf technology, multiple modules are automatically discovered and controlled from a single User interface in real time. The platform is supported under Mac and Windows environment.The onboard Digital Signal Processors (DSP) provide real time all the processing a speaker designers will expect to excel at his crossover design task. These include FIR + IIR filters, Parametric Equalizers (PEQ), Level, crossovers, comp/limiter, delay and more. The Graphical User Interface (GUI) platform is supported on both Mac and Windows environment.
  • On the power amplifier side, the ICEpower® 250ASX2 modules are complete AC plug-to-speaker amplification audio solutions offering flexible two-channel or bridgeable speaker drive. Their compact size, audiophile audio quality and high power output make them perfect for high-performing audio products. The amplifier is rated for up to 2x250W @ 4Ω or 1 x 500W @ 8Ω

As for audio connectivity, the PWR-ICE250 is fitted with both analog balanced (XLR) & unbalanced inputs (RCA) to provide maximum compatibility. A digital input (AES-EBU/SPDIF) saves on the A-D conversion for maximum performance while a Digital output (AES-EBU/SPDIF) allows multiple plate amplifiers to be linked to each other.


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  • DSP Powered plate amplifier with FIR + IIR filters
  • Powered by ICEpower® technology for 2x250W @ 4Ω or 1 x 500W @ 8Ω
  • Windows & Mac compatible, IP control over Ethernet/Wifi
  • Analog & Digital input
  • Multi-unit control via Ethernet
  • Perfect fit for 2way active speakers or Subwoofer plate amplifier

Product Downloads

What's in the Box?

  • 1 x PWR-ICE250 amplifier module
  • 1 x CAT5 patch cable
  • 1 x IEC power cord
  • 4 x black wood screws for mounting
  • 1 x Speaker wire harness to connect amplifier to speaker (60cm long)
  • Access to UserDownloads section for PWR-ICE FIR/IIR plugins

Optional Accessories

Digital Signal Processor Engine Fixed point processor

Internal Processing resolution
& Sample rate

28-56 bit / 96kHz

Input/Ouput Configuration

2 in / 2 out

Audio Input Connectivity


2 x Balanced analog input
2 x Unbalanced analog inputs|
Stereo Digital: AES-EBU (XLR)
Supported ASRC: 44.1k ~ 216kHz

Audio Output Connectivity

1, speaker output: wire type; 2,
Stereo Digital: AES-EBU (XLR)

Input / Output Max Levels

IN: Unbalanced 2Vrms / Balanced: 2Vrns
OUT: SE mode: 2x250W @ 4Ω 1% THD(240V ac);2,
BTL mode 500W @ 8Ω 1% THD (240V ac)

Input Impendance
1 Unbalanced 10KΩ / 2, Balanced 47 KΩ
Output Impedance SE-mode: 3Ω / BTL mode 6Ω
Calibration Software PWR-ICE software
Filtering Technology FIR + IIR
DSP Presets Up to 4 presets
Dimensions 267 x 153 x 75 mm
Power AC 110/240V selectable
Win/Mac Compatible
UMIK-1 Included
Bass Management
Room EQ Wizard Support

Application notes on PWR-ICE projects

In this application note, we will show you how to design and build your own DSP-controlled active loudspeaker with the miniDSP ICE-PWR125 DSP plate amplifier. Note that a similar project could be built using the PWR-ICE250 if additional power is required.

In this application note, we will show you how to design and build your own DSP-controlled subwoofer with the miniDSP PWR-ICE125DSP plate amplifier. Note that a similar project could be built with the PWR-ICE250 if added power is required.

John Reekie from Hifizine, the enthusiast's audio webzine, documented an amazing design in the following 2 part articles. This is a prototype speaker dubbed the "Mini Convertible," which uses drivers from Seas of Norway ( and a miniDSP PWR-ICE125 plate amp for amplification and DSP crossover.  The prototype has a removable baffle for experimentation with different baffle profiles and cabinet bracing, but the final speaker will have the baffle glued (i.e. no screw holes).

 HifiZine Mini Convertible prototype rear view

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