ASHLY MA500.8 8-Channel Multi-Mode Power Amplifier, 8x500W at 2/4/8 Ohms and 70V/25V

Product Overview

The Ashly MA500.8 is an eight-channel multi-mode power amplifier delivering 500W per channel at 2, 4, or 8 ohms and 70V/100V constant-voltage operation, making it the most powerful model in the Ashly MA series commercial installation line. Designed for large-scale distributed audio systems, this rack-mount amplifier handles both low-impedance and constant-voltage speaker loads on a per-channel basis, giving installers maximum flexibility across zones. It is purpose-built for commercial AV installations where high channel count, multi-mode switching, and long-term reliability are essential requirements.

Product Description

The Ashly MA500.8 is the flagship of the MA series multi-mode power amplifier lineup, providing eight independent channels each rated at 500 watts into 2, 4, or 8 ohms and full 500W into 70V and 100V constant-voltage lines, with 300W available at 25V. Each channel independently switches between low-impedance and constant-voltage modes via a rear-panel selector, so a single amplifier can simultaneously drive low-Z speakers in one zone and 70V distributed speakers in another. Ashly's proprietary D-MAX amplifier technology and Advanced Intelligent Power-Sharing deliver Class D efficiency with very low power draw and reduced thermal output compared to conventional amplifiers. The 2RU rack-mount chassis features removable Euroblock connectors for both inputs and outputs, simplifying installation wiring and future serviceability. A front-panel volume control knob per channel and a Power Standby switch provide local control, and both can be locked via a rear-panel switch to prevent unauthorized adjustment. An 80Hz high-pass filter and clip limiter are switchable per channel, protecting speakers and maintaining clean output under high-demand conditions. Remote volume control ports allow integration with external control systems or wall-panel volume controls. Comprehensive LED indicators on the front panel display signal level and amplifier status for all eight channels, enabling at-a-glance system monitoring. The MA500.8 is dual-voltage capable (120V AC and 230V AC), supporting international deployments. The 5-year Ashly limited warranty covers this amplifier for professional installation environments. With 4,000W total system output and the ability to serve eight independent zones, the MA500.8 is the right choice for large venues requiring a single rack-mount amplifier with full zone independence.

Key Features

• 8 x 500W Multi-Mode Output — Each channel delivers 500W at 2, 4, or 8 ohms and at 70V/100V constant-voltage, with 300W at 25V, covering all standard distributed audio load types.
• Per-Channel Impedance Switching — Each of the eight channels independently switches between low-Z and Hi-Z (25V/70V/100V) operation, enabling mixed speaker systems on one amplifier.
• D-MAX Class D Technology — Ashly's proprietary Class D amplifier stage provides high efficiency, lower operating temperatures, and reduced power consumption versus linear designs.
• Advanced Intelligent Power-Sharing — Dynamic power allocation between channels ensures consistent output under varying load conditions across all zones.
• Removable Euroblock Connectors — Input and output connections use removable Euroblock terminals for clean, reliable wiring during installation and maintenance.
• Switchable 80Hz High-Pass Filter — Per-channel HPF protects speakers from low-frequency overload and integrates cleanly with subwoofers or distributed ceiling speakers.
• Clip Limiter Per Channel — Prevents amplifier clipping from reaching connected speakers, extending driver life in high-demand commercial environments.
• Remote Volume Control Ports — Dedicated remote VC ports on each channel accommodate external wall-panel or control-system volume adjustment.
• Front-Panel Lock — Volume knobs and power standby switch can be locked via rear-panel switch to prevent unauthorized user changes.
• Overcurrent and Thermal Protection — Built-in protection circuits guard against overcurrent faults and thermal overload, with fan cooling for sustained high-output operation.
• Dual-Voltage Power Supply — Accepts 120V AC or 230V AC input, suitable for domestic and international commercial installations.
• 5-Year Limited Warranty — Backed by Ashly Audio's industry-standard warranty covering professional installation use.

Typical Applications

• House of worship main and overflow zone audio
• School auditorium and performing arts center sound reinforcement
• Multi-zone hotel and hospitality distributed audio
• Large retail store background music and paging systems
• Restaurant and bar multi-zone audio installations
• Commercial meeting space and conference room audio distribution
• Government and institutional facility audio systems
• Auditorium and multi-purpose room sound systems

Technical Specifications

Frequently Asked Questions

Can each channel be set to a different impedance mode independently?

Yes. Each of the eight channels has its own rear-panel impedance selector, allowing any combination of low-Z (2/4/8 ohm) and Hi-Z (25V/70V/100V) operation on a single amplifier.

Is the MA500.8 suitable for 70V distributed audio systems in large venues?

Yes. All eight channels support 70V and 100V constant-voltage operation at full 500W per channel, making it well suited for large-venue distributed audio with 70V transformer-tapped speakers.

What is D-MAX technology?

D-MAX is Ashly's proprietary Class D amplifier technology that delivers high efficiency and low heat generation while maintaining clean, reliable audio output under sustained commercial use conditions.

Does the MA500.8 include DSP or network connectivity?

No. The MA500.8 is a pure power amplifier without onboard DSP or network connectivity. For DSP processing, Ashly's FX series or AQZ32 can be used upstream in the signal chain.

Can front-panel controls be locked to prevent unauthorized adjustment?

Yes. A rear-panel lock switch disables the front-panel volume knobs and Power Standby switch, preventing unauthorized changes in installed commercial environments.

What protection does the MA500.8 provide for connected speakers?

The amplifier includes per-channel clip limiters and an 80Hz switchable high-pass filter to protect speakers, along with overcurrent and thermal protection circuits in the amplifier itself.

What form factor is the MA500.8 and how much rack space does it require?

The MA500.8 is a 2RU 19-inch rack-mount amplifier, fitting standard equipment racks used in commercial AV installations.