Linea Research 44M20
Four Channel Touring Power Amplifier
High-Power
The Linea Research 44M20 is a high-power touring amplifier with integrated DSP and network control, delivering reliable performance and precise system management for live sound and large-scale audio applications.
Description
The Linea Research 44M20 is a high-performance touring power amplifier, designed to deliver exceptional output, precision control, and reliability for demanding live sound environments. As part of the renowned 44M Series, it combines advanced Class D amplification with integrated DSP and network control, providing a complete solution for powering and managing professional audio systems.
Engineered for touring applications such as concerts, festivals, and large-scale events, the 44M20 offers powerful multi-channel output with consistent performance under continuous load. Its integrated DSP enables precise system tuning, including EQ, crossover, delay, and speaker protection, ensuring optimal performance across a wide range of loudspeaker systems.
With flexible connectivity options including analogue, AES3, and networked audio, the 44M20 integrates seamlessly into modern audio infrastructures. Combined with intuitive control software for real-time monitoring and system management, it provides audio professionals with the tools needed to deliver reliable, high-quality sound in even the most demanding environments.
44M20 Features
- Four channels of sonically pure Class D amplification
- Unique, precise, 96kHz digital signal processing
- Over-designed switch mode power supply
- 85V to 240V Auto-sensing PSU
- 6,000 to 20,000 watts RMS total output
- Full front panel user interface
- Ethernet network for system operation and monitoring
- Analogue, AES3 and optional Dante™ / AES67 digital network audio
- Powerful grouping & multi-layer EQ
- Accepts 48kHz and 96kHz FIR files via System Engineer (certain models)
- Fully designed and engineered in house by Linea Research
- Manufactured in the UK
Resources & Downloads
Data sheets, manuals and resources for the 44M20
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Quick Specs
- GENERAL
- Number of channels
- 4
- Total power output, all channels driven
- 20,000, 10,000, and 6,000 Watts RMS
- Audio inputs
- 4x Analogue, 2x AES3 and 4x Dante™ / AES67 (factory fitted option)
- Digital Signal Processing
- High performance DSP processing on all inputs and outputs
Technical Specifications
- GENERAL
- Number of channels
- 4
- Total power output, all channels driven
- 20,000, 10,000, and 6,000 Watts RMS
- Audio inputs
- 4x Analogue, 2x AES3 and 4x Dante™ / AES67 (factory fitted option)
- Digital Signal Processing
- High performance DSP processing on all inputs and outputs
- Control, monitoring and system status alarms
- Ethernet network, Volt-free relay and contact closure port
- Power-save modes
- Standby after user defined time, instant wake up on audio, Deep ECO sleep after user defined time, wake up on command
- System sleep and wakeup
- Front panel switch, network command, and audio detection
- POWER OUTPUT
- Power specification
- RMS output power per channel, all channels driven with continuous program material and a nominal ambient temperature of 40°C / 105°F
- Crest Factor of 4 (12dB), 2-Ohm nominal load
- 5,000W
- Crest Factor of 2.8 (9dB), 4-Ohm nominal load
- 3,000W
- Crest Factor of 2 (6dB), 8-Ohm nominal load
- 1,500W
- Bridged, per channel pair, 4-Ohm nominal load
- 10,000W
- 100V line (CV) operation, Crest Factor 4 (12dB)
- 5,000W
- 70V line operation, Crest Factor 4 (12dB)
- 3,500W
- 25V line operation, Crest Factor 4 (12dB)
- 1,250W
- AUDIO PERFORMANCE
- Amplifier topology
- Linea Research high performance Class D
- Amplifier modulation scheme
- Low feedback, multiple loop, with feed-forward error correction
- Dynamic range/ Measured relative to the amplifier output
- Analogue input, better than 113dBA typical/ AES / Dante™ input, better than 114dBA typical
- Gain (with all DSP level controls set to 0dB)
- 32dB
- Frequency response, 4 Ohm load
- <7Hz to >30kHz, 4 Ohms, -2.5dB points
- Total harmonic distortion, THD
- <0.05% typical, 1kHz signal, AES17 filter, 4 Ohm load
- Inter-channel crosstalk, worst case combination
- better than -85dBr at 1kHz and -75dBr at 10kHz
- Maximum analogue input level
- +20dBu
- Analogue input sensitivity range for full output
- 0dBu to +20dBu, continuously adjustable
- Analogue input and link
- Input 20k Ohm, electronically balanced, link directly connected to input
- Analogue ground scheme
- AES48 standard compliant
- AES3 input
- Transformer isolated with unique active cable equalisation for extended range
- AES3 link
- Active AES3 signal regeneration. Automatic direct bypass to the AES3 input ensuring the audio signal will still flow even when the amplifier is powered down
- AES3 supported sampling rates
- 24kHz to 192kHz (auto locking)
- DIGITAL SIGNAL PROCESSING
- Resolution
- 40 bit, Linea Research proprietary algorithms
- Sample rate
- 96kHz throughout
- Physical inputs to DSP drive modules
- 4x analogue, 2x AES & 4x Dante™ / AES67 inputs can be routed to four DSP drive modules
- Drive module input processing
- Input signal routing, delay, gain, HPF, Phase, Mute, EQ: 2x low shelf, 6x PEQ / band pass, and FIR shelving filters
- Drive module output processing
- Source, delay, gain, Phase, Mute, crossover filters, VX limiters, EQ: low shelf, 8x PEQ / band pass, and shelving filters
- Preset management
- 10 snapshots for device wide setup, 50 presets for loudspeaker settings, Presets can be recalled to sets of outputs or individual outputs as required
- Overlays
- Twelve additional independent overlays of EQ, Delay, and Gain, Flexible grouping for effective control of many amplifier channels in large systems
- Class leading VX limiters
- See the ‘speaker protection systems’ section in the manual
- Hardman crossover filters
- Better out of band rejection than Linkwitz-Riley
- LIR crossover filters
- Linear Phase without the compromises of FIR filters
- POWER SUPPLY
- Topology (main power supply)
- Linea Research high performance Series Resonant
- Topology (auxiliary and standby supplies)
- Low quiescent Eco-Flyback
- Internally stored energy
- >600 Joules
- Nominal mains input voltage range
- 85V to 240V Power supply automatically detects voltage and configures accordingly
- Mains input frequency range
- 47Hz to 63Hz
- Mains inrush current (max for <10ms)
- 6A at 115V and 12A at 230V
The Linea Research 44M20 is a high-performance touring power amplifier, designed to deliver exceptional output, precision control, and reliability for demanding live sound environments. As part of the renowned 44M Series, it combines advanced Class D amplification with integrated DSP and network control, providing a complete solution for powering and managing professional audio systems.
Engineered for touring applications such as concerts, festivals, and large-scale events, the 44M20 offers powerful multi-channel output with consistent performance under continuous load. Its integrated DSP enables precise system tuning, including EQ, crossover, delay, and speaker protection, ensuring optimal performance across a wide range of loudspeaker systems.
With flexible connectivity options including analogue, AES3, and networked audio, the 44M20 integrates seamlessly into modern audio infrastructures. Combined with intuitive control software for real-time monitoring and system management, it provides audio professionals with the tools needed to deliver reliable, high-quality sound in even the most demanding environments.
- Four channels of sonically pure Class D amplification
- Unique, precise, 96kHz digital signal processing
- Over-designed switch mode power supply
- 85V to 240V Auto-sensing PSU
- 6,000 to 20,000 watts RMS total output
- Full front panel user interface
- Ethernet network for system operation and monitoring
- Analogue, AES3 and optional Dante™ / AES67 digital network audio
- Powerful grouping & multi-layer EQ
- Accepts 48kHz and 96kHz FIR files via System Engineer (certain models)
- Fully designed and engineered in house by Linea Research
- Manufactured in the UK
| GENERAL | |
| Number of channels | 4 |
| Total power output, all channels driven | 20,000, 10,000, and 6,000 Watts RMS |
| Audio inputs | 4x Analogue, 2x AES3 and 4x Dante™ / AES67 (factory fitted option) |
| Digital Signal Processing | High performance DSP processing on all inputs and outputs |
| Control, monitoring and system status alarms | Ethernet network, Volt-free relay and contact closure port |
| Power-save modes | Standby after user defined time, instant wake up on audio, Deep ECO sleep after user defined time, wake up on command |
| System sleep and wakeup | Front panel switch, network command, and audio detection |
| POWER OUTPUT | |
| Power specification | RMS output power per channel, all channels driven with continuous program material and a nominal ambient temperature of 40°C / 105°F |
| Crest Factor of 4 (12dB), 2-Ohm nominal load | 5,000W |
| Crest Factor of 2.8 (9dB), 4-Ohm nominal load | 3,000W |
| Crest Factor of 2 (6dB), 8-Ohm nominal load | 1,500W |
| Bridged, per channel pair, 4-Ohm nominal load | 10,000W |
| 100V line (CV) operation, Crest Factor 4 (12dB) | 5,000W |
| 70V line operation, Crest Factor 4 (12dB) | 3,500W |
| 25V line operation, Crest Factor 4 (12dB) | 1,250W |
| AUDIO PERFORMANCE | |
| Amplifier topology | Linea Research high performance Class D |
| Amplifier modulation scheme | Low feedback, multiple loop, with feed-forward error correction |
| Dynamic range/ Measured relative to the amplifier output | Analogue input, better than 113dBA typical/ AES / Dante™ input, better than 114dBA typical |
| Gain (with all DSP level controls set to 0dB) | 32dB |
| Frequency response, 4 Ohm load | <7Hz to >30kHz, 4 Ohms, -2.5dB points |
| Total harmonic distortion, THD | <0.05% typical, 1kHz signal, AES17 filter, 4 Ohm load |
| Inter-channel crosstalk, worst case combination | better than -85dBr at 1kHz and -75dBr at 10kHz |
| Maximum analogue input level | +20dBu |
| Analogue input sensitivity range for full output | 0dBu to +20dBu, continuously adjustable |
| Analogue input and link | Input 20k Ohm, electronically balanced, link directly connected to input |
| Analogue ground scheme | AES48 standard compliant |
| AES3 input | Transformer isolated with unique active cable equalisation for extended range |
| AES3 link | Active AES3 signal regeneration. Automatic direct bypass to the AES3 input ensuring the audio signal will still flow even when the amplifier is powered down |
| AES3 supported sampling rates | 24kHz to 192kHz (auto locking) |
| DIGITAL SIGNAL PROCESSING | |
| Resolution | 40 bit, Linea Research proprietary algorithms |
| Sample rate | 96kHz throughout |
| Physical inputs to DSP drive modules | 4x analogue, 2x AES & 4x Dante™ / AES67 inputs can be routed to four DSP drive modules |
| Drive module input processing | Input signal routing, delay, gain, HPF, Phase, Mute, EQ: 2x low shelf, 6x PEQ / band pass, and FIR shelving filters |
| Drive module output processing | Source, delay, gain, Phase, Mute, crossover filters, VX limiters, EQ: low shelf, 8x PEQ / band pass, and shelving filters |
| Preset management | 10 snapshots for device wide setup, 50 presets for loudspeaker settings, Presets can be recalled to sets of outputs or individual outputs as required |
| Overlays | Twelve additional independent overlays of EQ, Delay, and Gain, Flexible grouping for effective control of many amplifier channels in large systems |
| Class leading VX limiters | See the ‘speaker protection systems’ section in the manual |
| Hardman crossover filters | Better out of band rejection than Linkwitz-Riley |
| LIR crossover filters | Linear Phase without the compromises of FIR filters |
| POWER SUPPLY | |
| Topology (main power supply) | Linea Research high performance Series Resonant |
| Topology (auxiliary and standby supplies) | Low quiescent Eco-Flyback |
| Internally stored energy | >600 Joules |
| Nominal mains input voltage range | 85V to 240V Power supply automatically detects voltage and configures accordingly |
| Mains input frequency range | 47Hz to 63Hz |
| Mains inrush current (max for <10ms) | 6A at 115V and 12A at 230V |
About Penguin Media Solutions
Penguin Media Solutions is a professional audio, video, and lighting design, installation, and maintenance company based in Brighton, UK. As an authorised Martin Audio dealer, we provide high-performance AV systems for commercial venues, hospitality, and event spaces across Brighton, London, and South-East England.
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