ASHLY CA 504 Power Amplifier 4 x 500W @ 4 Ohms, 250W @ 8 Ohms, 1000W bridged 70V

Product Overview

The Ashly CA 504 is a four-channel Class D power amplifier delivering 500W per channel at 4 ohms and 70V/100V constant-voltage capability, representing the entry-level model in the Ashly CA series commercial installation power amplifier lineup. Built on Ashly's D-MAX technology with Dynamic Power Factor Correction and SailFlow directed cooling, it provides 2,000W total output across four zones in a 2RU rack-mount chassis. The CA 504 is suited for commercial AV installations including houses of worship, schools, retail environments, and distributed audio systems where four-zone 70V or low-Z amplification is needed from an efficient, reliable rack-mount unit.

Product Description

The Ashly CA 504 delivers 500W per channel at 4 ohms (250W at 8 ohms) across four independent channels, with channel-pair bridging available for 1,000W into a single zone when maximum output is needed. All four channels support 70V and 100V constant-voltage operation for distributed speaker system installations, making the CA 504 compatible with transformer-tapped ceiling speaker systems in commercial environments. Stable 2 ohm operation allows multiple low-impedance speakers to be wired in parallel per channel where broader zone coverage is required. D-MAX Class D technology uses a high-speed switching power supply with Silicon Carbide semiconductors and Dynamic Power Factor Correction, delivering high efficiency that allows multiple amplifiers to operate on a single 20-amp circuit. SailFlow directed active cooling moves air specifically over the heat-generating areas of the chassis, keeping operating temperatures low during sustained commercial use without the noise of oversized fans. Per-channel controls include a switchable 80Hz HPF, clip limiter, and gain adjustment accessible from the front panel with a lockout switch. Balanced Euroblock and XLR combo inputs provide flexible wiring options for professional installation environments. Remote VC ports per channel support wall-panel volume control integration, and a remote standby port with switchable polarity allows connection to building automation or control systems. The solid metal front panel and lightweight 2RU chassis are designed for standard commercial installation equipment racks. A 5-year Ashly limited warranty covers the CA 504 for professional installation use. RoHS environmental certification confirms compliance with hazardous substances restrictions. Physical dimensions are 19 x 3.5 x 16.1 inches, weighing approximately 17.5 lbs.

Key Features

• 4 x 500W Class D Output — Each channel delivers 500W at 4 ohms (250W at 8 ohms), with bridged mode providing 1,000W per channel pair.
• Stable 2 Ohm Operation — Full power delivery into 2 ohm loads supports multiple-speaker parallel wiring per channel.
• 70V/100V Constant-Voltage Capable — All four channels support 70V and 100V distributed audio operation for transformer-tapped speaker systems.
• D-MAX Technology with Dynamic Power Factor Correction — Silicon Carbide semiconductor switching power supply delivers high efficiency with very low current draw, supporting multiple amplifiers on a single 20A circuit.
• SailFlow Directed Active Cooling — Precisely directed airflow targets high-heat areas of the chassis for reliable sustained commercial operation.
• Switchable 80Hz HPF, Limiter, and Gain Per Channel — Per-channel speaker protection and level controls optimize system performance.
• Balanced Euroblock and XLR Combo Inputs — Flexible balanced input connections for professional rack installations.
• Front-Panel Controls with Lockout — Front-accessible per-channel level control with lockout switch prevents unauthorized adjustment.
• Remote VC and Standby Ports — Per-channel VC ports and selectable-polarity remote standby for control system integration.
• RoHS Compliant — Meets RoHS environmental certification requirements.
• 5-Year Limited Warranty — Ashly Audio's standard warranty for professional commercial installation products.

Typical Applications

• House of worship 70V distributed speaker system amplification
• School and educational facility multi-zone audio
• Retail store background music and paging systems
• Hotel and hospitality corridor and common area audio
• Restaurant and bar multi-zone background music
• Conference room and commercial meeting space audio systems
• Government and institutional facility distributed audio

Technical Specifications

Frequently Asked Questions

What is the rated output power of the CA 504?

The CA 504 delivers 500W per channel at 4 ohms (250W at 8 ohms) across four channels. Channel pairs can be bridged for 1,000W into a single zone.

Can the CA 504 drive 70V distributed speaker systems?

Yes. The CA 504 supports 70V constant-voltage operation, providing 2 x 1,000W at 70V in bridge-mono configuration across channel pairs.

Is the CA 504 stable into 2 ohm loads?

Yes. The CA 504 is rated for stable 2 ohm operation, which allows multiple 4 or 8 ohm speakers to be wired in parallel per channel.

How does D-MAX technology affect power consumption?

D-MAX technology uses Dynamic Power Factor Correction with Silicon Carbide semiconductors, resulting in significantly lower current draw than comparable amplifiers. Multiple CA 504 units can operate simultaneously on a single 20-amp circuit.

Does the CA 504 include DSP processing?

The CA 504 includes switchable 80Hz HPF and limiter per channel for basic speaker protection, but does not include full onboard DSP. Upstream DSP processors such as the Ashly AQZ32 can be added for complete system processing.