Innosonix µMA04/POE Amplifier

Product Description

Technical Information

Product

• Title: µMA04/POE
• Product Series: MICRO MAXX
• Amplifier Type: 4-Channel Half-Bridge GaN (Gallium Nitride)
• Power Stage: Half-Bridge GaN Amplifier

Electrical / Audio Performance

• Output Power (4Ω): 120W per channel
• Output Power (8Ω): 120W per channel
• Bridge Mode Power (8Ω): 240W
• Max Output Voltage: 50 Vpeak (4Ω) / 100 Vpeak (8Ω)
• Max Output Current: 10 Apeak (Limited)
• Emergency Shutdown Current: 15 Apeak
• DC Offset: < 25 mV
• Frequency Response: 10Hz – 20kHz (+0.0 / -1 dB)
• Signal-to-Noise Ratio (S/N): 108 dBA (typical)
• THD+N:

  • @ 4Ω, 1W: < 0.05%

  • @ 4Ω, 10W: < 0.1%

• SMPTE IMD: < 0.1%
• CCIF IMD: < 0.1%
• Output Impedance: 40 mΩ (typical)
• Crosstalk:

  • Enabled Channels: < 70 dB

  • Disabled Channels: < 120 dB

• Analog Gain: Software adjustable (20Vp – 60Vp, default 50Vp)
• Protection: Overtemperature, DC, Overcurrent

DSP & Processing

• DSP Architecture: ARM-based 32/64-bit floating point
• Input Matrix: 1 × matrix (4 inputs per channel)
• Audio-over-IP: Dante / AES67 + signal generators (sine, white, pink, brown noise)
• Level Control: Mute, Volume, Phase
• Filters (per channel):

  • 32 × EQ / High-pass / Low-pass

  • Types: Bell, Notch, High-shelf, Low-shelf, All-pass (1st / 2nd order)

• High/Low-Pass Slopes: 6–48 dB/Oct (Bessel, Butterworth, Linkwitz-Riley, Variable Q)
• FIR Filter: 512 taps, ASCII file import
• Fractional Delay: Up to 48,000 samples / 1000 ms / 330 m
  • Resolution: 0.001 units
• Limiters:
  • Current Limiter (A)
  • Voltage Limiter (V)
  • Power Limiter (W)
• Speaker Monitoring:
  • Live Impedance Analyzer
  • 20 kHz Pilot Tone Generator
• Latency:
  • Digital Input: 134 samples
  • AoIP @ 44.1 kHz: 3.04 ms
  • AoIP @ 48 kHz: 2.8 ms

• Connectivity & Interfaces
  
• Network Connection: RJ45 (100 Mbit/s Ethernet + PoE)
• Speaker Connector:

  • Wuerth Elektronik 691343710004

  • Phoenix Contact MSTB 2,5/4-ST / STF

  • Compatible with all 5 mm Euroblock connectors

• Hardware Interface: Multicolor LED, Factory Reset Button
• Software Interface: RESTful API (maxx_remote)
• Third-Party Integration: Q-SYS, Loxone

Power & Consumption

• PoE Specification
  
• Supported PSE Types: PoE / PoE+ / PoE++
• IEEE Standards: 802.3af / 802.3at / 802.3bt
• Available Power at Device:

  • PoE: 12.95W

  • PoE+: 25.5W

  • PoE++: 71.3W

• Recommended Cable: AWG23 – CAT5e to CAT7
• Grounding: Case and outputs referenced to Ethernet screen
• Audio Power via PoE (Shared)
• Continuous Output: 4W / 14W / 51W
• Peak Output (10 dB Crest): 40W / 140W / 480W

Power Consumption

• Power Off: 3W
• Idle: 8W
• 1/8 Power @ 4Ω: 70W

Mechanical

• Dimensions: 195.25 mm (W) × 39.00 mm (H) × 214 mm (D)
• Weight: 1.25 kg
• Boxed Dimensions: 30 × 26 × 6 cm
• Boxed Weight: 1.65 kg
• Cooling: Passive

Material & Architecture

• Chassis: Compact, Slim-Line Design
• Internal Architecture: ARM-Based Floating Point DSP Platform
• Amplifier Technology: GaN (Gallium Nitride)

Environmental

• Operating Temperature: 0 °C to +40 °C
• Thermal Management: Passive Cooling
• Sustainability: Low power consumption through GaN technology
• Protection Systems: Thermal, DC, Overcurrent
• Network Protocol Compliance: Dante, AES67