1. Dual-Transformer Power Supply

The AF Series uses a dual-transformer power supply architecture to provide strong current delivery and improved power stability.

This design helps maintain consistent amplifier performance when multiple channels are operating under heavy loads, making it suitable for demanding corporate event and professional sound reinforcement applications.

2. Four Independent Amplifier Channels

Four independent channels provide flexible system configuration for:

• Main PA speakers

• Front-fill speakers

• Monitor speakers

• Passive subwoofers

• Multi-zone audio systems

• Conference and corporate AV systems

The multi-channel design can reduce the number of amplifiers required in larger professional audio systems.

3. High Output Power

The AF Series provides substantial power reserves for professional passive speaker systems.

• AF409: 4 × 900W @ 8Ω

• AF409: 4 × 1200W @ 4Ω

• AF411: 4 × 1100W @ 8Ω

• AF411: 4 × 1600W @ 4Ω

This makes the series suitable for applications ranging from corporate event sound reinforcement to large-format professional PA systems.

4. High Damping Factor

With a damping factor of ≥280, the amplifier provides strong control over connected loudspeaker drivers.

High damping factor helps maintain accurate driver control, particularly when driving professional low-frequency loudspeakers and passive subwoofers.

5. Low Distortion Audio Performance

The AF Series is designed for clean signal reproduction with:

• THD below 0.05%

• IMD below 0.02%

• Signal-to-noise ratio ≥112dB

The low-distortion architecture helps preserve speech clarity and musical detail in professional event environments.

6. Wide Frequency Response

The amplifier provides a 20Hz–20kHz frequency response, covering the full audible range required for professional speech reinforcement, background music and live event sound.

7. Professional Heavy-Duty Construction

The AF Series is designed for continuous heavy-duty operation and professional sound reinforcement environments.

Its professional construction makes it suitable for installation in equipment racks, AV systems and professional event production systems.

8. Flexible Professional System Integration

The amplifier can be integrated with professional:

• Line array speakers

• Passive full-range speakers

• Passive subwoofers

• Digital DSP processors

• Mixing consoles

• Speaker management systems

• Corporate AV systems

For additional amplification options, see Power Amplifiers.

AF409

The AF409 provides four channels with up to 4 × 900W at 8Ω and 4 × 1200W at 4Ω, making it a practical choice for high-output corporate AV and professional PA applications.

AF411

The AF411 offers higher output capacity, reaching 4 × 1100W at 8Ω and 4 × 1600W at 4Ω, making it particularly suitable for larger corporate events, professional PA systems and high-output speaker configurations.

AF409 vs AF411

AF409 is a suitable option when a balanced combination of output power and system capacity is required. AF411 provides greater power reserves for higher-output loudspeaker configurations and larger professional sound systems.

Corporate Event Sound Systems

The AF Series is well suited to corporate events requiring clear speech, background music and reliable multi-channel amplification.

Typical applications include:

• Corporate conferences

• Product launches

• Business presentations

• Annual meetings

• Company celebrations

• Award ceremonies

• Exhibition halls

• Convention centers

Multiple amplifier channels allow different speaker zones to be powered independently.

Conference & Meeting Rooms

The AF Series can be integrated into larger conference audio systems to power passive speakers throughout meeting rooms, conference halls and presentation spaces.

It provides the power and frequency response required for both speech reinforcement and multimedia playback.

Professional Event Production

For event production companies, four-channel amplification can simplify system design by allowing multiple loudspeaker groups to be powered from a single amplifier unit.

The high-output AF411 can also be paired with larger passive loudspeaker systems when additional power headroom is required.

Live Events & Concerts

The AF Series can be used to drive passive PA speakers, line arrays and subwoofers in live event applications.

For larger systems, it can be integrated with professional Line Array Speakers and passive subwoofers.

Hotels & Hospitality Venues

The four-channel architecture is suitable for hospitality venues requiring independent audio zones, including:

• Hotels

• Ballrooms

• Banquet halls

• Restaurants

• Function rooms

• Entertainment venues

Fixed Installation Audio Systems

The AF Series can also be incorporated into permanent professional audio installations where reliable multi-channel amplification is required.

Professional System Integration

The AF amplifier series is designed to function as part of a complete professional audio chain:

Audio Source → Digital Mixer → DSP / Speaker Management → AF Power Amplifier → Passive Speakers / Subwoofers

It can be combined with:

• Professional line array speakers

• Full-range passive speakers

• Passive subwoofers

• DSP processors

• Digital mixing consoles

• Signal processors

• Speaker management systems

• Professional audio accessories

Q1: How many channels does the AF Series have?

The AF Series provides four independent amplifier channels, allowing multiple passive speaker groups to be driven from one amplifier.

Q2: What is the difference between AF409 and AF411?

The main difference is output capacity. AF409 delivers 4 × 900W at 8Ω and 4 × 1200W at 4Ω, while AF411 delivers 4 × 1100W at 8Ω and 4 × 1600W at 4Ω.

Q3: Can the AF amplifier be used for corporate events?

Yes. The four-channel architecture makes it suitable for corporate conferences, presentations, exhibitions, banquets and other professional event sound systems.

Q4: Can it power passive subwoofers?

Yes. The AF Series is designed for professional passive loudspeaker systems and can be incorporated into systems using passive subwoofers. The high damping factor and high current capability are beneficial for controlling low-frequency speaker loads.

Q5: Does the AF Series support bridge mono operation?

The specifications for both AF409 and AF411 list Bridge Mono Mode as N/A.

Q6: What is the frequency response of the AF Series?

The AF Series has a frequency response of 20Hz–20kHz, covering the full audible frequency range for professional speech and music reproduction.

Q7: What is the damping factor?

The AF Series has a damping factor of ≥280, supporting accurate control of connected loudspeaker drivers.

Q8: Is the AF Series suitable for fixed installations?

Yes. In addition to event production, the amplifier can be used for professional fixed installations such as conference centers, hotels, auditoriums, banquet halls and other commercial venues.

Q9: Can the AF Series be used with line array systems?

Yes. Its high output and four-channel architecture make it suitable for driving professional passive line array systems.