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Coolback 500

3-Way Active Amplifier Solution with Digital Crossover

We are proud to present the successor for the very successful Coolback 300 and Coolback 600 series of active power amplifier solutions:

Coolback 500 is a sophisticated, luxurious and powerful 3-way active "plate amplifier" intended to be build into the back of the loudspeaker. The electronics consists of a digital crossover DCN14, 3 x class AB power amplifier modules PA1CC & PA3CC, a dedicated power supply for the digital crossover and power amplifiers. The power supply PSU6AGS features individual regulated rails; one for the digital circuitry 3,3V; a 5V analogue supply for the converters and the positive and negative supply for the op-amps. The power supply also features an Automatic sense turn ON / OFF circuit and of course a soft start to prevent house fuse dropout. The toroidal transformer is a 500VA low noise type. All electronics are assembled on a 160mm x 40mm German made aluminium heat sink profile with a height of 580mm. The high quality aluminium heat sink is CNC machined in Denmark. The maximum flange can be 15mm.

The combination of low thermal resistance heat sink and low idle power consumption amplifier modules makes the Coolback II 300 run very cool.

The only visible on the outside are the connectors (Balanced Input - Neutrik XLR, PC Communication - Neutrik USB and IEC mains Power inlet), Operation Switch (ON-OFF-AUTO) and LED Indicators (ON-StandBy). The Coolback 500 is ideal for an ambitious "small" to medium 3-way active DIY loudspeakers.

The only visible on the outside are the connectors (Balanced Input - Neutrik XLR, PC Communication - Neutrik USB and IEC mains Power inlet), Operation Switch (ON-OFF-AUTO) and LED Indicators (ON-StandBy). The Coolback 500 is ideal for an ambitious large 3-way active DIY loudspeakers.

The Coolback 500 can be programmed by XOverWizard II standard or XOverWizard II advanced software. The software makes the Coolback 800 a precision tool for the ambitious DIY person and optimal loudspeaker setups can be achieved.

 

Low stand-by Power Supply and Soft Start circuit

 

Notice the high quality heat sink that is the basis of the Coolback 500 !

 

 

Specifications:
  • DCN14 * 24bit 96kHz Digital Crossover Module (One input channel)
  • PA1CC * 120W (8Ω) / 160W (4Ω) Power Amplifier Module (tweeter) - min. load 4Ω
  • PA3CC * 220W (8Ω) / 370W (4Ω) Power Amplifier Module (mid-range) - min. load 3Ω
  • PA3CC * 220W (8Ω) / 370W (4Ω) Power Amplifier Module (bass) - min. load 3Ω
  • PSU6AGS * System Power Supply - 6 Nichicon Gold Tune Capacitors 40.800µF/80V
  • Custom designed Silent Design Toroidal Transformer 2 x48Vac / 500VA (rectified +/-67V dc)
  • Distortion : <0.08%
  • Frequency response : 5-45kHz (-3dB)
  • Signal/Noise Ratio : >108dB
  • Thermal protection above 80°Celcius
  • Weight: app. 10kg
  • Cut-out dimensions: 570mm (height) x 120mm (width) - Internal Depth 100mm
  • Overall dimensions: 600mm (height) x 160mm (width) x 150mm (depth)

 

 

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