Qi5004 Class-D power amplifier 4x500W 2U DSP - HARMONIC DESIGN HDE-40405

hd Qi5004 is a 4 x 500 W RMS power amplifier in 2U format that represents a modular and flexible hardware and software solution for driving Harmonic Design speaker systems. It includes 4 balanced inputs and 4 power outputs, which can be processed thanks to a high-performance DSP with IIR and FIR filters. The associated hd LevelZ user software allows clear access to all parameters via a Windows-based computer or directly on the amplifier via the 3.2" LCD display with navigation buttons. This Class-D power amplifier is designed to meet the highest demands on audio quality and reliability in fixed installation projects and mobile applications. Thanks to the extreme efficiency, heat generation is absolutely reduced to a minimum compared to conventional analogue models: the amplifier requires less cooling and operates permanently in the safe area. An intelligent temperature management system ensures the lowest possible noise emission and only activates the fans when required by the operating situation. Constant reliable operation is ensured by two independent switch-mode power supplies with power factor correction (PFC) that deliver high performance at all times, even under adverse mains conditions such as under or over-voltage, thanks to their universal operating range from 85 V to 265 V and are therefore far superior to conventional power supplies. The integrated hd MultiDSP digital system controller has a complete equalizer section consisting of 16 double precision IIR filters with freely selectable frequency, quality, gain and slope and an input/output FIR filter with a multi-stage limiter present on each channel. This allows the engineer to create a user-specific FIR filter for the installation, using the same approach as conventional multi-band equalizers, but without the inherent phase shifts. Main features High-end hd MultiDSP with 4 IN /4 OUT 4 x 500 W Class-D power amplifier with PFC 2 separate power supplies FIR & IIR filters Multistage limiter architecture Maximum operational safety and unlimited flexibility

Technical characteristics

• Output circuit: Class-D PWM-modulation
• Power rating (RMS @ 1% THD): 4 x 250 W  @ 8 ohm, 4 x 500 W @ 4 ohm, 4 x 725 W @ 2.7 ohm
• Controls: 5 x navigation buttons
• Display: 3.2″ LCD display with 4 lines of 20 characters each, LED VU meter each channel
• Connection: USB B port, 4 x input XLR (balanced), 4 x link XLR (balanced), 1 x power socket, 4 x output speakON NL  Chassis: 2 mm steel sheet, powder coating black, silkscreen white        
• Operating voltage: universal working range from 85 to 265 V_AC 50/60 Hz
• Power supply: self-regulating switching mode power supply, PFC
• Standby: 0.6 W                                          
• Protection circuit: switch-on delay, input limiter, short circuit protection, DC protection on the output, over / undervoltage protection, temperature monitoring
• Dimensions (W x H x D): 38" x 2U x 300 mm
• Weight: 8 kg