AC M-30 Karaoke DSP Processor
The AC M-30 is a compact karaoke DSP processor designed for home KTV systems, entertainment rooms, and small private karaoke rooms.
It combines professional karaoke sound processing with Bluetooth and MP3 playback, a color display, 7-band Music EQ, 7-band Microphone EQ, feedback suppression, Echo/Reverb effects, Center and Subwoofer processing, 6-channel speaker outputs, and USB PC tuning.
The M-30 is an excellent choice for users who want the flexibility of a separate professional karaoke processor without the complexity of a larger commercial DSP system.
A typical system can be configured as:
Karaoke Player / Audio Source → AC M-30 → Power Amplifier → Speakers
Key Features
- Professional Karaoke DSP processor
- Designed for Home KTV and small karaoke rooms
- Color display
- Bluetooth wireless music playback
- MP3 playback
- 7-band Music Parametric EQ
- 7-band Microphone Parametric EQ
- Independent Effect EQ
- Independent Center output EQ
- Independent Subwoofer output EQ
- 6-channel speaker output configuration
- Professional microphone feedback suppression
- Microphone low-cut filter
- Adjustable Echo and vocal effects
- ±5-step Key / Pitch Control
- 4 factory sound presets
- USB PC tuning software
- Adjustable startup Music / Mic / Effect volume
- Maximum volume lock
- Power-on delay
- Power-off mute protection
- English / Chinese interface
- ≥95dB signal-to-noise ratio
Designed for Home Karaoke
The M-30 provides the core DSP functions needed to properly tune a home karaoke system without overwhelming everyday users with unnecessary complexity.
Instead of relying on simple Bass, Mid, and Treble controls, the M-30 allows Music and Microphones to be tuned separately.
This makes it possible to adjust the system for:
- Different speaker models
- Different microphones
- Different room acoustics
- Vocal clarity
- Music tonal balance
- Feedback control
- Subwoofer integration
Once the system has been properly tuned, normal users can simply select a preset, adjust the volume, and start singing.
7-Band Music Parametric EQ
The Music section provides an independent 7-band parametric EQ with up to ±10dB adjustment.
This allows installers to shape the music response according to the connected speakers and room acoustics.
Instead of using the same EQ for both music and vocals, the M-30 keeps Music processing separate so the system can maintain better balance between background music and microphone vocals.
7-Band Microphone Parametric EQ
The Microphone section also includes its own 7-band parametric EQ with up to ±10dB adjustment.
This provides much greater control than conventional karaoke amplifiers with only basic tone controls.
Microphone EQ can be used to improve:
- Vocal warmth
- Clarity
- Presence
- Brightness
- Low-frequency buildup
- Harsh or uncomfortable frequencies
The M-30 also includes an adjustable Microphone Low-Cut Filter from 0Hz to 200Hz, helping reduce unwanted low-frequency noise and rumble.
Professional Feedback Suppression
Microphone feedback is one of the most common problems in karaoke systems.
The M-30 includes dedicated feedback suppression processing to help control microphone squeal while maintaining useful singing volume.
Combined with the 7-band Microphone EQ and low-cut control, the system can be tuned for cleaner and more stable vocal performance.
Karaoke Echo & Vocal Effects
The M-30 provides dedicated karaoke effect processing designed to make vocals smoother, fuller, and easier to sing through.
The Effect section includes its own 3-band parametric EQ, allowing the tone of the vocal effect to be adjusted separately from the original microphone signal.
This makes it easier to create a natural karaoke vocal with the desired amount of depth and space without making the voice muddy or unclear.
Independent Center & Subwoofer Processing
The M-30 provides dedicated processing for both Center and Subwoofer outputs.
Center Output
The Center output includes an independent 3-band parametric EQ, allowing additional speaker coverage to be adjusted separately from the main system.
Subwoofer Output
The dedicated Subwoofer section also provides a 3-band parametric EQ, allowing the low-frequency response to be tuned independently.
This makes it easier to integrate an active subwoofer or dedicated subwoofer amplifier into a home KTV system.
6-Channel Speaker Outputs
The M-30 supports a 6-channel speaker output configuration, providing greater flexibility than a conventional 2-channel karaoke processor.
The additional outputs can be used for:
- Main Left / Right speakers
- Center speaker
- Subwoofer
- Additional Left / Right speakers
This allows the processor to support different speaker layouts and provide more even coverage in larger living rooms or small private karaoke rooms.
These are configurable speaker outputs and should not be confused with Dolby or DTS surround decoding.
Bluetooth & MP3 Playback
Built-in Bluetooth allows compatible smartphones, tablets, and other devices to stream music directly to the M-30.
The processor also supports MP3 playback, providing another convenient option for everyday music and entertainment use.
This makes the M-30 useful not only for karaoke but also for casual music playback through the connected audio system.
±5-Step Key / Pitch Control
The M-30 includes adjustable Key Control with:
5 steps up + 5 steps down
This allows the pitch of the music to be changed to better match the singer’s vocal range without requiring a different version of the song.
4 Factory Sound Presets
The M-30 includes 4 professionally configured factory sound modes for quick selection.
These modes provide convenient starting points for different karaoke preferences and make the processor easier for everyday users to operate.
Professional installers can further fine-tune the system through the PC software according to the actual speakers and room.
Color Display & Easy Operation
The built-in color display provides a clear interface for everyday operation.
The M-30 supports both English and Chinese menus, making system setup and daily use straightforward for a wide range of users.
Professional USB PC Tuning
For professional installers and advanced users, the M-30 includes a USB PC tuning interface.
The tuning software provides access to detailed DSP settings for:
- Music
- Microphone
- Effects
- Center
- Subwoofer
- Output configuration
- EQ
- Feedback control
- System settings
Once the processor has been professionally adjusted, the settings can be stored for normal standalone operation.
Startup Volume & System Protection
The M-30 includes several practical system-management functions designed for home and installed karaoke systems.
These include:
- Music startup volume
- Microphone startup volume
- Effect startup volume
- Maximum volume lock
- Startup mode settings
- Power-on delay
- Power-off mute
Power-on delay and power-off mute help reduce unwanted switching noise and signal impact on the connected power amplifier and speakers.
Maximum volume limits also help prevent everyday users from accidentally operating the system at excessive levels.
Technical Specifications
Brand: AC
Model: M-30
Product Type: Karaoke DSP Processor
Frequency Response: 20Hz–20kHz (-1dB)
Microphone Input Sensitivity: 11mV
Music Input Sensitivity: 210mV
Music EQ: 7-Band Parametric EQ, ±10dB
Microphone EQ: 7-Band Parametric EQ, ±10dB
Effect EQ: 3-Band Parametric EQ
Center Output EQ: 3-Band Parametric EQ, ±10dB
Subwoofer EQ: 3-Band Parametric EQ, ±10dB
Microphone Low Cut: 0Hz–200Hz
Feedback Suppression: Yes
Key / Pitch Control: +5 / -5 Steps
Speaker Outputs: 6-Channel Output Configuration
Sound Presets: 4 Factory Presets
Display: Color Display
Bluetooth: Yes
MP3 Playback: Yes
PC Tuning: USB
Startup Volume Control: Music / Microphone / Effect
Maximum Volume Lock: Yes
Power-On Delay: Yes
Power-Off Mute: Yes
Signal-to-Noise Ratio: ≥95dB (A-Weighted)
Ideal Applications
- Home Karaoke
- Home KTV
- Living Room Karaoke Systems
- Entertainment Rooms
- Small Private Karaoke Rooms
- Small KTV Rooms
Frequently Asked Questions
Is the AC M-30 a power amplifier?
No. The M-30 is a Karaoke DSP processor / preamplifier. It normally connects to a separate power amplifier and passive speakers.
Is the M-30 suitable for home karaoke?
Yes. The M-30 is specifically well suited for home KTV and small karaoke rooms, providing professional Music and Microphone EQ, feedback suppression, vocal effects, Subwoofer processing, and PC tuning without unnecessary complexity.
How many EQ bands does the microphone section have?
The Microphone section provides a 7-band parametric EQ.
How many EQ bands does the Music section have?
The Music section also provides an independent 7-band parametric EQ.
Does the M-30 have feedback suppression?
Yes. It includes dedicated microphone feedback suppression to help reduce squeal and improve system stability.
Can I connect a subwoofer?
Yes. The M-30 provides a dedicated Subwoofer output with independent 3-band EQ for use with a compatible active subwoofer or subwoofer amplifier.
How many speaker outputs does the M-30 support?
The M-30 supports a 6-channel speaker output configuration, including Main, Center, Subwoofer, and additional speaker outputs.
Does the M-30 support Bluetooth?
Yes. Built-in Bluetooth allows compatible smartphones and tablets to stream music wirelessly through the connected audio system.
Can the M-30 be professionally tuned from a computer?
Yes. The USB PC tuning interface provides detailed access to Music, Microphone, Effect, Center, Subwoofer, EQ, and system settings.
What is the difference between the M-30 and M-590 / M-690?
The M-30 provides the essential professional DSP functions needed for home KTV and smaller karaoke systems.
The M-590 and M-690 are designed for more advanced installations and provide deeper microphone processing, more extensive output DSP, dynamics, limiters, delays, and additional professional system-control functions.
