ASHLY PEMA 4125.70D Amplifier plus OPDante Option Card

Product Overview

The Ashly PEMA 4125.70D is a 4-channel, 125W-per-channel Protea-Equipped Media Amplifier configured for 70V constant-voltage distributed audio, with a factory-installed OPDante option card for direct Dante audio network connectivity. As a complete one-box solution for smaller commercial AV installations, the PEMA 4125.70D integrates a full 8x8 Protea DSP audio processor, 8 built-in microphone preamps, and a Class-D amplifier in a single 2U rack-mount unit. The 500W total output power at 70V is suited for conference rooms, training rooms, and multi-purpose spaces where moderate speaker coverage requires fewer or smaller 70V distributed speakers. With 32-bit SHARC DSP, FIR filter capability, automatic feedback suppression, and a real-time clock with event scheduler, the PEMA 4125.70D handles complete audio system management for commercial spaces.

Product Description

The PEMA 4125.70D uses the same Protea-Equipped Media Amplifier platform as larger PEMA models but provides 125W per channel into 70V speaker systems, making it the right choice for commercial spaces where 70V distributed audio coverage is needed at more moderate power levels. The factory-installed OPDante option card connects the amplifier directly to a Dante audio network, receiving digital audio from any Dante-enabled source without analog cabling between equipment locations. All eight inputs are software-selectable for microphone or line level, with built-in preamps supporting direct condenser and dynamic microphone connections. The full Protea DSP suite on the 32-bit SHARC processor provides FIR filter capability, dynamics, equalization, crossover, delay, and metering, with hot-plug DSP placement allowing changes to the processing chain without interrupting live audio. A dedicated first-channel option allows transformer-isolated TEL-PBX level input for telephone paging integration. Eight pairs of summed-mono RCA inputs provide connections for consumer line-level sources. The real-time clock with event scheduler enables automated daily operation including scheduled preset changes and standby commands. Automatic DHCP network configuration reduces network setup time, and lockable front panel controls with multi-level software security prevent unauthorized adjustments. The unit is built in the United States and carries RoHS and cTUVus certifications.

Key Features

• 4-Channel 70V Output — 125W per channel (500W RMS total) for constant-voltage distributed speaker systems.
• OPDante Card Included — Factory-installed Dante option card for AoIP connectivity with Dante-enabled devices.
• 32-Bit SHARC DSP — 96kHz or 48kHz operation with 24-bit A/D and D/A conversion; FIR filter capable.
• 8 Built-In Mic Preamps — Software-selectable mic/line on all 8 input channels.
• Hot-Plug DSP Placement — DSP functions can be inserted or reordered in the processing chain without stopping audio.
• Real-Time Clock and Event Scheduler — Automated daily operation including preset changes, standby, and power management.
• Telephone/PBX Input — Channel 1 configurable for transformer-isolated TEL-PBX level for phone system paging.
• Automatic DHCP Configuration — Reduces network setup time during installation.
• Multi-Level Software Security — Password-protected access with lockable front panel controls.
• Class-D Efficiency — Over 80% energy efficient with switching power supply.

Typical Applications

• Conference rooms and boardrooms with moderate 70V speaker coverage
• Training rooms and commercial meeting spaces
• Small houses of worship with distributed 70V systems
• Multi-purpose rooms requiring scheduled audio automation
• Government meeting rooms with Dante audio infrastructure

Technical Specifications

Frequently Asked Questions

What is the difference between the PEMA 4125.70D and the PEMA 4250.70?

The PEMA 4125.70D provides 125W per channel (500W total), while the PEMA 4250.70 provides 250W per channel (1000W total). The 4125.70D also includes a factory-installed Dante card. Choose based on the power requirements of the speaker system and whether Dante connectivity is needed.

Is the Dante card already installed in the PEMA 4125.70D?

Yes. The OPDante card is factory-installed and the unit ships ready for Dante network audio deployment.

Does the PEMA 4125.70D include DSP processing?

Yes. A full 32-bit SHARC Protea DSP engine is integrated, providing FIR filtering, EQ, dynamics, crossover, delay, and matrix routing on all inputs and outputs.

Can the PEMA 4125.70D be used for telephone paging?

Yes. Channel 1 can be configured for transformer-isolated TEL-PBX level input, supporting phone system paging integration.

How is the PEMA 4125.70D configured and controlled?

Configuration is performed using Ashly Protea NE software over standard 10/100 Ethernet. The unit supports automatic DHCP assignment to simplify network setup. Front panel controls can be locked via software.