ASHLY PEMA 4250D Amplifier plus OPDante Option Card

Product Overview

The Ashly PEMA 4250D is a 4-channel, 250W-per-channel Protea-Equipped Media Amplifier with a factory-installed OPDante option card, designed for commercial AV installations requiring Dante audio network connectivity in a compact network zone amplifier. As a complete one-box solution, the PEMA 4250D integrates an 8-in x 4-out Protea DSP audio processor, 8x8 matrix mixer, 8 built-in microphone preamps, and a high-efficiency Class-D amplifier in a single 2U rack-mount unit. The included Dante card provides direct AoIP integration with any Dante-enabled device on the network, making this an efficient choice for smaller-zone commercial meeting space audio systems. With 1000W total output power and full Protea DSP functionality, the PEMA 4250D covers conference rooms, training rooms, and multi-purpose spaces that need fewer amplifier channels but full DSP and network audio capability.

Product Description

The PEMA 4250D delivers four channels of 250W each into 4 or 8 ohm loads, with an integrated 8x4 Protea DSP signal processor providing complete audio management on all inputs and outputs. Eight balanced Euroblock and RCA inputs feed the built-in microphone preamps on all channels, supporting direct condenser and dynamic microphone connections without a separate preamp. The OPDante card adds Dante audio network inputs, connecting the amplifier to any Dante-enabled source device over a standard IP network. Remote DC level control on each input channel enables volume control from wall remotes or building automation systems without computer access. Ethernet control through Ashly Protea NE software provides access to all DSP parameters including equalization, dynamics, FIR filters, crossover, delay, and the 4x4 matrix mixer. A real-time clock with event scheduler allows automated daily operation, including preset changes, standby, and power cycling on a programmed schedule. The Class-D amplifier topology with switching power supply exceeds 80% energy efficiency, reducing heat dissipation and operating costs in equipment rooms. Balanced Euroblock speaker outputs and AUX line-level outputs provide flexible signal distribution for both amplifier zones and post-DSP signal feeds to other devices. The PEMA 4250D is manufactured in the United States and carries a 5-year limited warranty, with RoHS certification confirming environmental compliance.

Key Features

• 4-Channel Low-Impedance Output — 250W per channel (1000W RMS total) at 4 or 8 ohms.
• OPDante Card Included — Factory-installed Dante option card for direct AoIP audio network connectivity.
• 8-Input x 4-Output Protea DSP — FIR filter capable, dynamics, EQ, 4x4 matrix, crossover, delay, and metering.
• 8 Built-In Mic Preamps — Software-selectable mic or line input on all eight channels with phantom power support.
• Remote DC Level Control — Per-channel DC voltage control of input gain for wall remotes and building automation integration.
• Real-Time Clock and Scheduler — Automated daily operation including preset changes and scheduled standby.
• Ethernet Control — 10/100 Ethernet for Protea NE software configuration and monitoring.
• Class-D Efficiency — Over 80% energy efficient with switching power supply.
• Balanced Euroblock I/O — Balanced Euroblock and RCA inputs, Euroblock speaker and AUX outputs.

Typical Applications

• Conference rooms and boardrooms with 4-zone audio
• Training rooms requiring DSP-controlled audio
• Commercial meeting spaces with Dante network infrastructure
• Multi-purpose rooms with scheduled audio automation
• Small-to-mid-size houses of worship
• Government meeting rooms and hearing chambers

Technical Specifications

Frequently Asked Questions

How does the PEMA 4250D differ from the PEMA 4250C?

The PEMA 4250D includes a factory-installed Dante option card (OPDante), while the PEMA 4250C includes a CobraNet option card. Both are 4-channel, 250W-per-channel low-impedance amplifiers with the same Protea DSP engine; the choice depends on which network audio protocol is used in the installation.

Can the PEMA 4250D be used in a low-impedance speaker system?

Yes. The PEMA 4250D is the low-impedance (4/8 ohm) version. For 70V constant-voltage distributed audio, the PEMA 4250.70 or other 70V variants are the appropriate choice.

Does the PEMA 4250D include a matrix mixer?

Yes. The unit includes an 8-input x 4-output matrix with a full 4x4 matrix routing section, allowing flexible assignment of any input to any output.

How many channels of amplification does the PEMA 4250D provide?

The PEMA 4250D provides 4 channels of amplification, each rated at 250W. For 8-channel requirements, the PEMA 8250D variant is available.

What output connectors does the PEMA 4250D use?

Speaker outputs use Euroblock connectors. The unit also includes AUX line-level Euroblock outputs for post-DSP signal feeds to other devices.

Is the PEMA 4250D configurable for mic or line inputs?

Yes. All eight inputs are software-selectable for microphone or line level. Channel 1 can also be configured for transformer-isolated telephone/PBX level input.