1. Introduction
The Ashly CA502 is a 2-channel Class D power amplifier designed for professional audio installations. It delivers 500W per channel into 2 or 4 Ohms, and 250W into 8 Ohms. When bridged, it can provide 1000W into 4 Ohms or drive 70V/100V loads. This amplifier incorporates Ashly's proprietary D-MAX technology, featuring ultra-fast Silicone-Carbide switches, a high-speed power supply, and Dynamic Power Factor Correction for exceptional efficiency and stable performance. The SailFlow directed cooling system ensures optimal thermal management, allowing the amplifier to operate reliably even under demanding conditions.
Key features include front-panel input level controls, LED indicators for amplifier status, balanced Euroblock and XLR combo input connectors, VCA control ports, and switchable High-Pass Filters (HPF) and Limiters on each channel. A standby port and front panel lockout provide additional flexibility and security.
Figure 1: Front view of the Ashly CA502 amplifier, displaying its controls and indicators.
Product Overview Video
Video 1: An overview of the Ashly CA Series Power Amplifiers, highlighting their design and features.
2. Safety Information
Please read and understand all safety instructions before operating this device. Retain this manual for future reference.
- Power Source: Connect the amplifier only to a power supply of the type specified in this manual and on the unit.
- Grounding: Ensure the amplifier is properly grounded to prevent electric shock.
- Ventilation: Do not block any ventilation openings. Install in accordance with the manufacturer's instructions. Maintain adequate airflow around the unit.
- Water and Moisture: Do not expose this apparatus to rain or moisture. Do not use this apparatus near water.
- Heat: Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat.
- Servicing: Do not attempt to service this product yourself. Refer all servicing to qualified service personnel.
- Cables: Protect the power cord from being walked on or pinched, particularly at plugs, convenience receptacles, and the point where they exit from the apparatus.
3. Setup
3.1 Physical Installation
The Ashly CA502 is designed for rack mounting. It occupies 2U of rack space. Ensure sufficient space for ventilation, especially at the front and rear of the unit.
- Mount the amplifier securely in a standard 19-inch equipment rack using appropriate rack screws.
- Allow at least 1U of empty space above and below the amplifier for optimal airflow, especially in enclosed racks.
3.2 Rear Panel Connections
The rear panel provides all necessary input, output, and control connections. Refer to Figure 2 for a visual guide.
Figure 2: Rear panel of the Ashly CA502 amplifier, detailing connection points.
- Input Connectors: Use the balanced Euroblock or XLR Combo input connectors for audio signal input.
- Speaker Outputs: Connect your speakers to the Euroblock speaker output terminals. Ensure correct polarity and impedance matching.
- VCA Control Ports: For remote volume control, connect a standard volume control device (e.g., Ashly WR-1.1) to the VCA control ports.
- Standby Port: Connect external control systems for amplifier standby functionality.
- DIP Switch Settings: Configure per-channel settings such as Limiter and High-Pass Filter using the DIP switches. Refer to the 'Operation' section for detailed settings.
3.3 Power Connection
Connect the supplied AC power cord to the amplifier's power inlet and then to a grounded AC power outlet. The amplifier operates on 100-240VAC, 50/60Hz.
4. Operation
4.1 Front Panel Controls and Indicators
- Input Level Controls: Adjust the input sensitivity for each channel.
- LED Indicators:
- Clip/Mute (Red): Illuminates when the output signal is clipping or the channel is muted.
- Signal (Green): Indicates the presence of an input signal.
- Protect (Red): Illuminates if the amplifier enters protection mode due to an issue.
- Current (Yellow): Indicates high current draw.
- Temp (Yellow): Indicates high internal temperature.
- Bridge (Green): Illuminates when the amplifier is operating in bridged mode.
4.2 Rear Panel DIP Switch Settings
The DIP switches on the rear panel allow for per-channel configuration of various functions:
- Input Gain: Adjusts the input gain for the channel.
- Output Clip Limiter: Engages or disengages the output clip limiter.
- High-Pass Filter (HPF): Activates an 80Hz high-pass filter to protect smaller speakers.
- Standby Polarity: Configures the standby control input polarity.
- Front Panel Lock: Enables or disables the front panel controls.
4.3 Bridged Mode and 70V/100V Operation
The CA502 can be configured for bridged operation to combine the power of both channels into a single, higher-power output. This is also used for driving 70V or 100V constant voltage speaker systems.
- To engage bridged mode, refer to the DIP switch settings on the rear panel and the wiring diagram provided on the unit.
- For 70V/100V applications, ensure the amplifier is correctly configured and wired for constant voltage output. The CA502 model requires bridging to achieve 70V output.
5. Maintenance
Regular maintenance ensures the longevity and optimal performance of your Ashly CA502 amplifier.
5.1 Cleaning
- Disconnect the amplifier from the power source before cleaning.
- Use a soft, dry cloth to wipe down the exterior of the unit.
- Periodically use a vacuum cleaner with a brush attachment to remove dust from the ventilation grilles.
- Do not use liquid cleaners or solvents, as they may damage the finish or internal components.
5.2 Cooling System
The CA Series amplifiers feature a SailFlow directed cooling system designed for efficient heat dissipation. This system helps the amplifier run cool and quietly.
Figure 3: SailFlow directed cooling system diagram, showing efficient airflow.
- Ensure that the amplifier's ventilation openings are never obstructed.
- Maintain proper rack ventilation to prevent heat buildup, which can affect performance and lifespan.
6. Troubleshooting
If you encounter issues with your Ashly CA502 amplifier, consult the following basic troubleshooting steps:
- No Power:
- Check that the power cord is securely connected to both the amplifier and a live AC outlet.
- Verify the AC outlet is functioning by plugging in another device.
- No Audio Output:
- Ensure all input and output cables are correctly connected and secure.
- Check the input level controls on the front panel are not set to minimum.
- Verify that the input source is active and sending a signal.
- Check the speaker connections for correct polarity and secure contact.
- Ensure the amplifier is not in standby mode or muted.
- Distorted Audio / Clipping:
- Reduce the input level to prevent the Clip/Mute LED from illuminating.
- Ensure speakers are correctly matched to the amplifier's impedance.
- Check for damaged speaker cables or faulty speakers.
- Overheating (Temp LED on):
- Ensure adequate ventilation around the amplifier. Clear any obstructions from the air vents.
- Reduce the output level or the duration of high-power operation.
- Verify speaker impedance is within the amplifier's specified range.
If the issue persists after performing these checks, contact Ashly technical support or a qualified service technician.
7. Specifications
Detailed technical specifications for the Ashly CA502 amplifier:
Figure 4: General Power Amplifier Specifications for the CA Series.
| Feature | Specification |
|---|---|
| Model | CA502 |
| Number of Channels | 2 |
| Output Power (per channel) | 500W @ 2/4 Ohms, 250W @ 8 Ohms |
| Bridged Output Power | 1000W @ 4 Ohms, 70V/100V (bridged) |
| Amplifier Class | Class D (D-MAX Technology) |
| Voltage | 100-240 Volts AC, 50/60Hz |
| Item Dimensions (L x W x H) | 16 x 19 x 3.5 inches |
| Mounting Type | Rack (2U) |
| Item Weight | 15 Pounds |
| Material Type | Metal |
| Specification Met | FCC |
8. Warranty & Support
8.1 Warranty Information
The Ashly CA502 amplifier comes with a 5 Years Parts & Labor Warranty. This warranty covers defects in materials and workmanship under normal use. Please retain your proof of purchase for warranty claims.
8.2 Technical Support
For technical assistance, troubleshooting beyond the scope of this manual, or warranty service, please contact Ashly Audio customer support. Visit the official Ashly website for contact information and additional resources.
