4 inputs · compact · 1U half-rack
Aio4125
Four 125 W channels, 4×4 matrix DSP, switchable Lo-Z / Hi-Z / Bridge modes. The most compact format in the range for installations up to 4 zones.
Power
4×125W @ 4Ω
DSP matrix
4×4 I/O
Format
1U half-rack
Weight
2.8 kg
Technical specifications
Amplification & Outputs
- 4 independently configurable channels
- Power: 4×125W @ 4Ω / 2×250W @ 100V (Bridge) / 2×250W @ 8Ω (Bridge)
- Switchable modes: Lo-Z (4-8Ω) / Hi-Z (70V/100V) / Bridge (BTL)
- Class D full bandwidth PWM (UMAC™)
- THD+N: < 0.05% (20Hz-20kHz, 8Ω, 3dB below rated)
- Signal/Noise: > 106 dB (A-weighted)
- Frequency response: 20Hz-20kHz (+0/-0.5dB)
Audio inputs
- 4 balanced analog inputs (Euroblock) or unbalanced (RCA)
- Per-channel sensitivity: Mic / -10dBu / +4dBu / +14dBu
- 1 stereo S/PDIF input/output (digital)
- Full matrix DSP with flexible routing
DSP & Processing
- Configurable 4×4 input/output matrix
- 5-band parametric EQ per input
- 10-band parametric EQ per output
- Importable FIR filters (512 taps @ 48kHz)
- Configurable crossovers (HP/LP)
- Per-zone dynamic compression
- Peak/RMS/Clip limiter per output
- Configurable delay per output
- Lockable speaker presets (Audiophony/SYNC/JB Systems)
Zones & Routing
- Up to 4 mono zones or 2 stereo zones
- Priorities: Primary / Low / Mid / High
- Automatic ducking (main source attenuation)
- Per-zone source restriction
- Min/Max volume range per zone
- Tone and noise generator (calibration)
Control & Network
- HTML5 web interface (macOS, Windows, Linux, iOS, Android) — no installation required
- Built-in WiFi connection (access point or client)
- Ethernet RJ45
- Compatible with AioCTL wall controllers (black or white)
- 8-pin GPIO (faders, buttons, trigger)
- Open API for third-party integration
- Multi-user with PIN
Connectivity
- 4 balanced Euroblock + 4 unbalanced RCA (per pair)
- 2 Euroblock outputs (4 channels Lo-Z or 2 Hi-Z/Bridge)
- 1 S/PDIF In/Out (RCA)
- 1 8-pin GPIO Euroblock connector
- 1 RJ45 Ethernet · 1 IEC · WiFi antenna
Protection & Safety
- Short-circuit, DC, under-voltage, temperature, overload
- Clip limiter (Fast/Normal)
- Peak limiter (Auto/Manual)
- Configurable RMS limiter
Power supply
- UREC™ universal mains switch mode with PFC
- 100-240V AC, 50/60Hz
- Consumption: 700W max
- Standby: < 0.5W
Physical
- Format: 19″ 1U rack (half-width)
- Dimensions: 220 × 44.5 × 319 mm
- Weight: 2.8 kg
- Temperature: 0-40°C
- Temperature-controlled cooling
Included accessories
- Mains power cable
- 2 Euroblock input connectors
- 2 Euroblock output connectors
- 1 Euroblock GPIO connector
- 4 adhesive rubber feet
- Documentation