AC M-590 Professional Karaoke & Entertainment DSP Processor
The AC M-590 is a professional multi-output Karaoke DSP processor designed for high-end home KTV systems, dedicated karaoke rooms, home entertainment systems, restaurants, lounges, clubs, and commercial karaoke installations.
Unlike a basic karaoke effects processor, the M-590 is built to serve as the central audio processing hub of a complete sound system.
A typical system can be configured as:
Karaoke Player / TV / Audio Source → AC M-590 → Power Amplifiers → Speakers
It provides independent DSP processing for Music, MIC 1, MIC 2, Echo A, Echo B, Reverb, Main L/R, Surround L/R, Center, Subwoofer, and REC output, allowing virtually every major part of the system to be adjusted separately.
With 15-band Music PEQ, dual independent 20-band Microphone PEQ, 3-band Dynamic EQ, advanced vocal effects, feedback control, output limiters, crossover filters, delay, spectrum monitoring, and six professional balanced XLR outputs, the M-590 offers the flexibility required for both serious karaoke tuning and high-impact entertainment playback.
Key Features
- Professional multi-output Karaoke DSP processor
- 15-band parametric EQ for Music
- 20-band parametric EQ for MIC 1
- 20-band parametric EQ for MIC 2
- 7-band Effect Parametric EQ
- Independent Echo A, Echo B and Reverb
- 3-band Dynamic EQ
- 10-band Main L/R Output PEQ
- 10-band Surround L/R Output PEQ
- 10-band Center Output PEQ
- 10-band Subwoofer Output PEQ
- Dedicated REC output processing
- Microphone feedback suppression
- Microphone noise threshold control
- Microphone limiter and dynamics processing
- Output limiters with adjustable Attack, Release and Ratio
- Adjustable High-Pass and Low-Pass filters
- Independent output delay
- Real-time spectrum display
- 4 dedicated front-panel quick-recall buttons: M1–M4
- Up to 16 editable DSP configurations through PC software
- Windows professional DSP tuning software
- 6 professional balanced XLR outputs
- Optical digital audio input
- 2 stereo RCA analog audio inputs
- Dedicated stereo REC output
- Suitable for both Karaoke and TV / movie audio playback
Professional 15-Band Music Processing
The M-590 provides a dedicated 15-band parametric EQ for Music, giving installers precise control over the tonal balance of the playback system.
Each EQ band provides adjustable:
- Frequency
- Q
- Gain
- Filter Type
- Bypass
Additional Music processing includes:
- Input Source Selection
- Input Level
- Key / Pitch Control
- High-Pass Filter
- Low-Pass Filter
- Independent Left / Right Processing
This allows the music signal to be matched carefully to different speakers and room acoustics without affecting the microphone tuning.
For karaoke, this means cleaner music and better separation from the vocal.
For movies and entertainment playback, the same DSP control can be used to create a fuller, more controlled and more dynamic system response.
Dual Independent 20-Band Microphone PEQ
MIC 1 and MIC 2 each have their own independent 20-band parametric EQ.
This provides dramatically more tuning flexibility than conventional karaoke processors with only Bass, Mid and Treble controls.
Each microphone channel can be optimized for:
- Vocal warmth
- Clarity
- Presence
- Brightness
- Harsh frequencies
- Low-frequency buildup
- Different microphone characteristics
- Different vocal styles
Additional microphone processing includes:
- Input Level
- Feedback Suppression
- Noise Threshold
- Microphone Limiter
- Attack Time
- Release Time
- Ratio
- High-Pass Filter
- Low-Pass Filter
This level of control allows an experienced installer to create vocals that are clear, powerful, comfortable to sing through, and less prone to feedback.
Advanced Feedback and Vocal Control
Feedback is one of the most common limitations in a high-output karaoke system.
The M-590 combines dedicated feedback processing with 20-band microphone EQ, filtering, limiter control, and noise management to provide multiple levels of protection and tuning flexibility.
Instead of simply lowering the microphone volume whenever feedback appears, problematic frequency areas can be controlled more precisely while preserving vocal clarity and energy.
This is particularly valuable in rooms where microphones are used relatively close to the speakers or where higher singing levels are required.
Echo A + Echo B + Reverb
The M-590 provides three dedicated karaoke effect sections:
Echo A
Echo B
Reverb
This allows much greater flexibility than processors that provide only one basic Echo control.
Adjustable effect parameters include:
- Effect Level
- Direct Vocal Level
- Pre-Delay
- Delay
- Repeat
- Left / Right Delay Relationship
- High-Pass Filter
- Low-Pass Filter
- 7-Band Effect Parametric EQ
The effects can be tuned from a clean and natural vocal presentation to a deeper, wider and more spacious traditional KTV sound.
Because the original microphone and effect signals are processed independently, vocal clarity can be maintained while still creating the desired sense of space.
3-Band Dynamic EQ
The M-590 also includes an advanced 3-band Dynamic EQ section.
Each band provides adjustable:
- Frequency
- Q
- Gain
- Threshold / Limit Level
- Attack Time
- Release Time
- Ratio
- Above / Below Threshold Operation
Unlike conventional static EQ, Dynamic EQ can change its processing according to signal level.
For professional installers, this provides another powerful tool for controlling frequencies that only become excessive at higher levels while leaving the natural sound less affected at normal levels.
Independent Main L/R DSP
The Main Left and Right outputs include their own dedicated DSP processing stage.
Available controls include:
- Music Level
- Microphone Level
- Echo A Level
- Echo B Level
- Reverb Level
- 10-Band Parametric EQ
- Left / Right Mute
- Independent Left / Right Delay
- High-Pass Filter
- Low-Pass Filter
- Output Limiter
- Attack
- Release
- Ratio
This is an important advantage in a professionally tuned system.
After Music, Microphone and Effects have been adjusted individually, the Main Output DSP can be used to tune the final speaker and room response as a complete system.
Independent Surround L/R Processing
The M-590 includes dedicated Surround Left and Surround Right outputs with independent DSP control.
Available processing includes:
- Music / Microphone / Effect Mix Levels
- 10-Band Parametric EQ
- High-Pass / Low-Pass Filtering
- Output Limiter
- Left / Right Delay
- Mute Control
This makes the M-590 ideal for multi-speaker karaoke rooms where rear speakers are used to improve coverage and create a more immersive sound field.
Correctly adjusted surround delay and level can help the room sound larger and more evenly covered without simply making the rear speakers louder.
Independent Center Output DSP
A dedicated Center output provides additional flexibility for systems using a center speaker.
Center processing includes:
- Music Level
- Microphone Level
- Echo A Level
- Echo B Level
- Reverb Level
- 10-Band Parametric EQ
- High-Pass / Low-Pass Filters
- Delay
- Limiter
- Mute
A center speaker can be used to improve vocal focus, strengthen coverage in larger rooms, or provide additional flexibility in custom entertainment installations.
Dedicated Subwoofer DSP
The M-590 includes a completely independent Subwoofer output processing section.
Available adjustments include:
- Music Level
- Microphone Level
- Echo A Level
- Echo B Level
- Reverb Level
- 10-Band Parametric EQ
- High-Pass Filter
- Low-Pass Filter
- Delay
- Limiter
- Mute
This allows the subwoofer crossover, level and timing to be matched directly to the main speakers.
A properly tuned subwoofer adds much more than simply “more bass.” It can provide deeper impact, stronger musical dynamics, and a more powerful cinematic experience while keeping the main speakers cleaner and less stressed.
Great for TV & Movie Playback
The M-590 is not limited to karaoke.
A compatible TV can send audio to the M-590 through the Optical digital input or analog audio connection, allowing the same speaker system to be used for movies, streaming content and everyday entertainment.
With dedicated:
Main L/R + Surround L/R + Center + Subwoofer outputs
the M-590 can be configured for a multi-speaker entertainment system with independently adjustable EQ, crossover, level, delay and limiter settings.
When properly matched with quality amplifiers and speakers, this allows the system to deliver:
- Greater low-frequency impact
- Stronger dynamic contrast
- Wider room coverage
- Better dialogue presence
- More immersive multi-speaker playback
- Cleaner output at higher listening levels
This makes it possible to use one professionally tuned sound system for both karaoke performance and movie entertainment.
The M-590 is an audio DSP processor and is not intended to replace an AV receiver for proprietary surround-format decoding such as Dolby Atmos or DTS:X.
6 Professional Balanced XLR Outputs
The M-590 provides six professional balanced XLR outputs:
- Main Left
- Main Right
- Surround Left
- Surround Right
- Center
- Subwoofer
Balanced XLR connections provide improved resistance to induced hum and interference, especially when equipment is installed in a rack or when longer signal cable runs are required.
This makes the M-590 an excellent match for professional power amplifiers and larger installed karaoke systems.
Optical + Dual RCA Audio Inputs
The M-590 supports both digital and analog audio sources.
Available audio inputs include:
- Optical Digital Audio Input
- 2 × Stereo RCA Analog Inputs
- External Microphone Inputs
This allows connection to:
- Karaoke players
- Televisions
- Streaming devices
- Media players
- Other home entertainment sources
For TV playback through Optical, the television should be configured to output a compatible digital audio format.
Dedicated REC Output
The M-590 includes a dedicated stereo REC output.
This connection can send the processed audio signal to external equipment such as:
- Audio recorders
- Audio interfaces
- Capture devices
- Streaming or recording systems
The M-590 itself does not internally record audio.
The REC connection is an audio output intended for use with external recording equipment.
4 Front-Panel Quick-Recall Modes
For everyday operation, the M-590 provides four dedicated preset buttons:
M1 / M2 / M3 / M4
These allow users to recall commonly used sound configurations immediately without entering advanced DSP menus.
For example, an installer could prepare modes for:
- Everyday Karaoke
- Powerful Vocal
- Movie / Entertainment
- Custom Room Setting
The exact configuration of each mode can be professionally tuned according to the system.
Up to 16 Editable DSP Configurations
For professional setup and management, the Windows PC tuning software supports up to 16 editable DSP configurations.
Different configurations can be stored for:
- Different rooms
- Different speaker systems
- Different singers
- Different vocal styles
- Karaoke playback
- Movie playback
- Different installation requirements
Names can be assigned within the PC software to make these configurations easier for installers to organize.
Custom names are used within the PC software; the M-590 front panel continues to use the dedicated M1–M4 quick-recall controls for everyday operation.
Professional Windows PC DSP Tuning
The M-590 can be connected to a Windows computer for detailed professional system configuration.
The tuning software provides graphical control over:
- Music DSP
- Dynamic EQ
- MIC 1
- MIC 2
- Echo A
- Echo B
- Reverb
- Main L/R
- Surround L/R
- Center
- Subwoofer
- REC Output
- Parametric EQ
- High-Pass / Low-Pass Filters
- Feedback Processing
- Limiters
- Output Delay
- Spectrum Monitoring
- DSP Configuration Management
This gives installers the ability to tune the complete system from the signal source all the way to the individual speaker outputs.
Technical Specifications
Brand: AC
Model: M-590
Product Type: Professional Karaoke DSP Processor
Music EQ: 15-Band Parametric EQ
Microphone EQ: Dual Independent 20-Band Parametric EQ
Effect EQ: 7-Band Parametric EQ
Dynamic EQ: 3-Band Dynamic EQ
Vocal Effects: Echo A + Echo B + Reverb
Main Output EQ: 10-Band Parametric EQ
Surround Output EQ: 10-Band Parametric EQ
Center Output EQ: 10-Band Parametric EQ
Subwoofer Output EQ: 10-Band Parametric EQ
Feedback Processing: Yes
Output Limiter: Yes
High-Pass / Low-Pass Filters: Yes
Output Delay: Yes
Spectrum Display: Yes
Front-Panel Quick Recall: 4 Modes (M1–M4)
PC DSP Configurations: Up to 16 Editable Configurations
Analog Audio Inputs: 2 × Stereo RCA
Digital Audio Input: Optical
Balanced Audio Outputs: 6 × XLR
XLR Output Channels: Main L/R, Surround L/R, Center, Subwoofer
Recording Connection: Dedicated Stereo REC Output
PC Tuning: Windows DSP Control Software
Signal-to-Noise Ratio: >90dB
Maximum Input / Output Level: 4V RMS
Power Supply: AC 110V
Dimensions: 19.1 × 8.7 × 1.75 in (485 × 220 × 44.5 mm)
Net Weight: 8.6 lb (3.9 kg)
Ideal Applications
- High-End Home Karaoke
- Home KTV Systems
- Karaoke + Movie Entertainment Rooms
- Dedicated Karaoke Rooms
- Private KTV Rooms
- Restaurants
- Bars & Lounges
- Clubs
- Multi-Speaker Entertainment Systems
- Professional Karaoke Installations
Frequently Asked Questions
Is the AC M-590 a power amplifier?
No. The M-590 is a professional Karaoke DSP processor. It processes audio before sending the signal to separate power amplifiers or compatible powered speakers.
Can I connect the M-590 to a TV and use it for movies?
Yes. A compatible TV can send audio to the M-590 through the Optical digital input or analog audio connection.
The system can then use the Main, Surround, Center and Subwoofer outputs for a more powerful multi-speaker entertainment setup.
Does the M-590 decode Dolby Atmos or DTS:X?
The M-590 should be considered a professional audio DSP and karaoke processor, not a replacement for an AV receiver or surround decoder.
Its strength is detailed processing, routing and tuning of the audio signal and multiple speaker outputs.
How many microphone EQ bands does the M-590 have?
The M-590 provides two independent microphone channels, each with a 20-band parametric EQ.
Does the M-590 have a Main Output EQ?
Yes. The Main Left and Right outputs include dedicated 10-band parametric EQ, HPF/LPF, delay, level and limiter processing.
Does it support Surround, Center and Subwoofer outputs?
Yes. The M-590 provides independent DSP processing and balanced outputs for Main L/R, Surround L/R, Center and Subwoofer.
How many presets are available?
The front panel provides 4 dedicated quick-recall buttons (M1–M4).
The PC tuning software can manage up to 16 editable DSP configurations for professional setup and system management.
Does the M-590 record audio internally?
No. The M-590 provides a REC audio output for connecting an external recorder, audio interface or capture device. It does not contain an internal recording function.
Are the outputs balanced?
Yes. The M-590 provides six professional balanced XLR outputs for Main L/R, Surround L/R, Center and Subwoofer.
Can the M-590 be professionally tuned from a computer?
Yes. The Windows PC software provides detailed control of Music, Microphones, Dynamic EQ, Echo, Reverb, output EQ, filters, limiters, delays, spectrum monitoring and DSP configurations.
David –
I chose the complete AC commercial sound system, including two high-power amplifiers, four 12-inch stage speakers, and professional performance microphones. The effect is absolutely stunning, offering a professional singer’s experience. I’m all set to prepare for my party night