AC MC2.8 Professional High-Power Power Amplifier – 800W × 2 @ 8Ω
The AC MC2.8 is a high-performance professional 2-channel power amplifier designed for home KTV systems, dedicated karaoke rooms, restaurants, bars, lounges, clubs, and professional entertainment installations.
Delivering 800W × 2 channels at 8Ω and 1200W × 2 channels at 4Ω, the MC2.8 provides the power, dynamic headroom, and speaker control required for demanding passive sound systems.
Unlike a basic power amplifier, the MC2.8 also includes built-in Limiter, Low-Cut and Subwoofer processing, adjustable 25Hz–150Hz crossover control, selectable input sensitivity, Stereo / Parallel / Bridge operating modes, XLR Link outputs, and professional Speakon speaker connections.
This combination makes the MC2.8 especially well suited for professionally tuned karaoke and entertainment systems where clean vocals, strong dynamics, powerful bass, and reliable speaker protection are all important.
Key Features
- 800W × 2CH @ 8Ω
- 1200W × 2CH @ 4Ω
- High-output professional 2-channel power amplifier
- TD-Class amplifier design
- Built-in Limiter on each channel
- Built-in Low-Cut / Subwoofer processing
- Adjustable 25Hz–150Hz crossover frequency
- Processing On / Bypass control
- Stereo / Parallel / Bridge operating modes
- 0.775V / 1.4V / 2.5V selectable input sensitivity
- Professional balanced XLR inputs
- XLR Link outputs for additional amplifier connections
- Professional Speakon speaker outputs
- High damping factor for strong speaker control
- Built-in protection circuitry
- Designed for demanding karaoke and professional audio systems
- US power configuration
800W × 2 Power at 8Ω
The MC2.8 delivers:
800W × 2CH @ 8Ω
and:
1200W × 2CH @ 4Ω
providing substantial amplifier headroom for many professional passive karaoke and PA speakers.
Karaoke places unique demands on a power amplifier. Music can contain strong low-frequency peaks while live microphones create fast vocal transients.
Adequate amplifier headroom allows these peaks to be reproduced with greater authority without forcing the amplifier to operate continuously near clipping.
When properly matched with the speakers, the MC2.8 can provide:
- Clearer high-level vocals
- Stronger musical dynamics
- Tighter bass response
- Greater output capability
- Better transient response
- More stable performance during demanding use
Built-In Speaker Processing
The MC2.8 goes beyond a conventional power amplifier by providing useful speaker-management functions directly on the rear panel.
Each channel includes selectable processing for:
- Limiter
- Low-Cut
- Subwoofer mode
- Adjustable crossover frequency
The crossover frequency can be adjusted from approximately:
25Hz–150Hz
This allows the MC2.8 to be configured more precisely for different speaker applications.
For example, Low-Cut processing can be used to reduce unnecessary deep bass from full-range karaoke speakers, while Subwoofer processing can be used when the amplifier is assigned to compatible low-frequency speaker applications.
A dedicated Processing control also allows the built-in processing section to be enabled or bypassed when external DSP processing is preferred.
Independent Limiter for Speaker Protection
Each amplifier channel provides an independent Limiter On / Off control.
When properly configured, limiting helps control excessive signal peaks before they are amplified and sent to the connected speakers.
This provides an additional layer of protection for:
- High-frequency drivers
- Woofers
- Karaoke speakers
- Professional passive speakers
- High-output systems
Limiter protection is particularly useful in karaoke environments, where unexpected microphone peaks or sudden high music levels can occur.
For systems using a professional external DSP processor, the MC2.8’s built-in protection can also serve as an additional safeguard.
Adjustable Low-Cut & Subwoofer Crossover
Each channel includes an adjustable frequency control covering approximately:
25Hz to 150Hz
Together with the selectable Low-Cut / Subwoofer processing modes, this gives installers additional flexibility when configuring different speaker systems.
Full-Range / Karaoke Speakers
Low-Cut processing can reduce frequencies below the useful operating range of the main speakers.
This can help:
- Reduce unnecessary woofer excursion
- Improve usable headroom
- Tighten low-frequency response
- Reduce stress on smaller full-range speakers
Subwoofer Applications
Subwoofer processing can limit the amplifier output to the desired low-frequency range for compatible subwoofer systems.
This allows basic crossover management directly from the power amplifier without requiring an additional standalone crossover for simpler installations.
Stereo / Parallel / Bridge Operating Modes
The MC2.8 supports three professional operating modes:
Stereo
Each channel receives and amplifies its own independent input signal.
This is the standard configuration for most Left / Right karaoke and professional speaker systems.
Parallel
A single input signal can be distributed to both amplifier channels, making it convenient when both channels need to reproduce the same source.
Bridge
Bridge Mode combines the amplifier channels for selected high-power single-load applications.
The connected speaker system must be compatible with the required bridged impedance and power.
Selectable Input Sensitivity
The MC2.8 provides three selectable input sensitivity settings:
This allows the amplifier to be properly matched with different upstream equipment, including:
- Karaoke DSP processors
- Digital mixers
- Audio processors
- Professional preamplifiers
- Speaker-management processors
Correct input sensitivity helps maintain proper gain structure and prevents the amplifier from reaching full output too early or requiring unnecessarily high signal levels from the processor.
Balanced XLR Inputs & XLR Link Outputs
The MC2.8 uses professional balanced XLR inputs for connection to DSP processors, mixers, and other professional audio equipment.
Each channel also includes an XLR Link output.
The Link connection allows the incoming audio signal to be passed to another amplifier, which is useful when multiple amplifiers are used in larger installations.
For example:
DSP Processor → MC2.8 → XLR Link → Additional Power Amplifier
This reduces the need for additional signal splitters and simplifies larger equipment-rack installations.
Professional Speakon Speaker Outputs
Professional Speakon-style speaker outputs provide secure connections between the amplifier and passive speakers.
These connectors are designed for high-current speaker-level signals and provide a more secure connection than conventional consumer speaker terminals.
The rear panel also clearly identifies the connection configuration for Stereo and Bridge operation, making professional system installation easier.
High Damping Factor for Better Speaker Control
The MC2.8 provides a damping factor greater than 350.
A high damping factor helps the amplifier maintain tighter electrical control over the connected speaker drivers, particularly the woofer.
When properly matched with the speakers, this can contribute to:
- Tighter bass
- Faster transient response
- More controlled woofer movement
- Cleaner low-frequency reproduction
This is especially important in karaoke systems where music needs powerful bass while vocals must remain clean and controlled.
Designed for Professional Karaoke Systems
The MC2.8 is a dedicated power amplifier and is designed to work with an external karaoke DSP processor.
A typical system can be configured as:
Karaoke Player / Audio Source
↓
Karaoke DSP Processor
↓
AC MC2.8 Power Amplifier
↓
Passive Speakers
Using a separate DSP processor and power amplifier allows the system to be professionally tuned for:
- Music EQ
- Microphone EQ
- Echo / Reverb
- Feedback suppression
- Speaker crossover
- Room correction
- Output limiting
- Speaker protection
This architecture is ideal for higher-performance home KTV and commercial karaoke installations.
Technical Specifications
Brand: AC
Model: MC2.8
Product Type: Professional 2-Channel Power Amplifier
Amplifier Type: TD-Class
Output Channels: 2
Rated Power @ 8Ω Stereo: 800W × 2CH
Rated Power @ 4Ω Stereo: 1200W × 2CH
Rated Power @ 2Ω Stereo: 2400W × 2CH
Bridge Power @ 8Ω: 1930W × 1CH
Frequency Response: 20Hz–20kHz (±0.3dB)
Total Harmonic Distortion: <0.1% @ 1kHz
Signal-to-Noise Ratio: >95dB
Damping Factor: >350
Crosstalk: >80dB
Input Sensitivity: 0.775V / 1.4V / 2.5V Selectable
Input Impedance: 20kΩ Balanced / 10kΩ Unbalanced
Operating Modes: Stereo / Parallel / Bridge
Limiter: Independent Per Channel
Speaker Processing: Low-Cut / Subwoofer
Crossover Frequency: Adjustable 25Hz–150Hz
Processing Bypass: Yes
Audio Inputs: Balanced XLR
Link Outputs: XLR Link
Speaker Outputs: Professional Speakon
Power Supply: AC 110V–120V / 60Hz, US Version
Ideal Applications
- High-End Home KTV
- Home Karaoke Systems
- Dedicated Karaoke Rooms
- Commercial KTV Rooms
- Restaurants
- Bars & Lounges
- Clubs
- Entertainment Venues
- Professional Passive Speaker Systems
- Subwoofer Applications
- Multi-Amplifier Audio Systems
Frequently Asked Questions
How much power does the AC MC2.8 produce at 8Ω?
The MC2.8 delivers 800W per channel × 2 at 8Ω.
How much power does it produce at 4Ω?
The MC2.8 delivers 1200W per channel × 2 at 4Ω.
Does the MC2.8 have a built-in crossover?
Yes. The MC2.8 provides selectable Low-Cut / Subwoofer processing with an adjustable frequency range of approximately 25Hz–150Hz.
Does it have speaker protection?
Yes. Each channel includes an independent Limiter, providing an additional layer of protection against excessive signal peaks when correctly configured.
What operating modes does it support?
The MC2.8 supports Stereo, Parallel, and Bridge modes.
What are the XLR Link outputs used for?
The XLR Link outputs allow the incoming audio signal to be passed to another amplifier, making it easier to build larger multi-amplifier systems.
Can I use the MC2.8 with a karaoke DSP processor?
Yes. The MC2.8 is designed to work with professional Karaoke DSP processors and other line-level audio processors.
Does the MC2.8 include Echo or microphone effects?
No. The MC2.8 is a dedicated power amplifier. Karaoke effects, microphone EQ, feedback suppression, and advanced system tuning should be handled by an external Karaoke DSP processor.
Is the MC2.8 suitable for subwoofers?
Yes. Its high output capability and built-in Subwoofer processing can be useful for compatible low-frequency speaker systems when properly configured.
