High Power, Eight-Channel Class D Amplifier
• Eight channels of efficient Class D amplification
• Very high power density in 2U rack height
• 10,000 Watts total power output
• High performance 96kHz DSP on all inputs and outputs (48kHz on outputs when implementing FIR filters)
• Switch mode power supply
The iK81 can deliver a full 1250 watts per channel into 2, 4 or 8 ohms with all channels driven while remaining highly efficient. Its high efficiency reduces the energy drawn from the mains supply and ensures the power reserves needed to deliver superb sound under arduous live conditions. Ethernet is used for system remote control and monitoring via Martin Audio’s VU-NET software application, while a user friendly front panel interface allows full local control of all features.
Dante digital audio network inputs are also provided for digital audio distribution and control. Powerful DSP is fully integrated into the iK81 to provide a multitude of features. It also provides up to 1000 FIR filter taps @ 48kHz on each output channel, which is essential to implement DISPLAY’s wide bandwidth optimisation process in the WPM line array.
The iK81 employs comprehensive protection functions to maintain safe operating conditions of both the amplifier and the loudspeakers driven — including a sophisticated loudspeaker limiter suite which incorporates peak, RMS and excursion limiting, as well as multiband limiting for passive 2-way systems.
FEATURES
• Eight channels of efficient Class D amplification
• Very high power density in 2U rack height
• 10,000 Watts total power output
• High performance 96kHz DSP on all inputs and outputs (48kHz on outputs when implementing FIR filters)
• Switch mode power supply
• Global mains operation, 85V to 240V auto-sensing
• Intuitive, user-friendly, front panel interface
• Analogue, AES3 and Dante™ digital audio network inputs
• Ethernet network for system control and monitoring via Martin Audio VU-NET™ software application
• Comprehensive protection and monitoring functions
APPLICATIONS
• Dedicated system amplifier for the Wavefront Precision Series
• Versatile multi-channel amplification for Martin Audio loudspeaker systems
GENERAL | |
TYPE | Eight-channel Class D amplifier |
POWER OUTPUT (*) |
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CV LINE OUTPUT (*) |
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DIGITAL SIGNAL PROCESSING | 96kHz/48kHz DSP on all inputs and outputs |
COOLING | Dual vari-speed fans, front-to-back airflow |
MAXIMUM AMBIENT TEMPERATURE | 40°C (104°F) |
AUDIO INPUTS/OUTPUTS | |
ANALOGUE IN/LINK (4 CHANNELS) |
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ANALOGUE INPUT IMPEDANCE | 20kΩ balanced to ground |
MAXIMUM ANALOGUE INPUT LEVEL | +20dBu |
AES3 IN/LINK (2 CHANNELS) | 1 x female, 1 x male Neutrik™ XLR, balanced |
DANTE™ (4 CHANNELS) | 2 x shielded RJ45, primary and secondary |
AMPLIFIER OUTPUTS | 4 x Neutrik Speakon™ NL4 |
AUDIO PERFORMANCE | |
DYNAMIC RANGE |
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FREQUENCY RESPONSE | 7Hz-30kHz (‐2.5dB points, 4Ω load) |
TOTAL HARMONIC DISTORTION | <0.05% typical @ 1kHz, 4Ω load |
SLEW RATE | >60V per microsecond |
DAMPING FACTOR | >800 at amplifier output, ref 8Ω |
CONTROL AND MONITORING NETWORK | |
PROTOCOL | Ethernet |
CONTROL APPLICATION | Martin Audio VU-NET™ |
DIGITAL SIGNAL PROCESSING | |
SAMPLE RATE | 96kHz (48kHz for FIR filter implementation) |
PHYSICAL INPUTS |
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DRIVE MODULE INPUT DSP | Input signal routing, delay, gain, HPF, Phase, Mute EQ: 2 x low shelf, 6 x PEQ/bandpass and FIR shelving filters |
DRIVE MODULE OUTPUT DSP | Source, delay, gain, Phase, Mute, crossover filters, limiters EQ: low shelf, 8 x PEQ / band pass and shelving filters |
POWER SUPPLY | |
TYPE | High performance Series Resonant |
AC INPUT OPERATING RANGE | 85 – 240V ~ AC, 47 – 63Hz |
MAINS INRUSH CURRENT | 6A at 115V, 12A at 230V (max for <10ms) |
MAINS CONNECTOR | Neutrik 32A Powercon™ |
PHYSICAL | |
DIMENSIONS | (W) 482 x (H) 2U/88mm x (D) 441mm (W) 18.98in x (H) 2U/3.46in x (D) 17.35in (incl handles and optional rear support) |
WEIGHT | 12.5kg (27.5lbs) |
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