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latest products please see Ground Sound Overview

Do you want to build your own an amplifier? Or do you want to build your crossover for an active system?
We offer you kits and components in very high quality.
 

Coolback for your speaker

Coolback is offered as system kit with all included: Coolback 300 or 600 plate, modules, connectors, switch, leds, wires, screws, distances, washers. The last digit of the part's number indicates the number of power amplifier modules PA3CC supplied with the kit.
 
Coolback

Ground Sound Coolback kits

Coolback (Coolkit) contains a digital crossover DCN 23 with digital signal processor.

In addition stable power amplifier modules are delivered with power supply and transformer.

Building instruction for building up coolback kit 603.
 

Ground Sound Coolback 300 kit

The Active Speaker Management System is mounted on the back of a speaker. All electronics are assembled on the coolback (back plate) which is acting as a heat sink for the amplifier modules. Visible outside are the connectors (Balanced Input, PC Communication and Power inlet), Function Switch (ON-OFF-AUTO) and LED Indicators (ON-Standby). The Coolback 300 aluminium sheet is 150mm wide and 550mm high - a thickness of 10mm - a flange of maximum 20mm for mounting..

The coolback kit include these modules and fittings:

  • DCN 23, the Digital Crossover with 24 bits / 96 kHz
  • PA1CC, the Power Amplifiers with 100W per channel
  • PSU4SA Power Supply with 4 Audio Grade Caps
  • the Transformer TR 300 with 300 VA in Toroidal Silent Design
  • accessories (Neutric input and power connectors)
The Coolback 300 offers a nice power package in small dimensions and features all of the same benefits which our bigger systems do.

Coolkit 302 - 2 way kit 200W

It contains:
DCN 23 + 2 x PA1CC + PSU4SA + TR 300 VA
per speaker kit (for one cabinet)
- not available (_)
 

Coolkit 303 - 3 way kit 300W

It contains:
DCN 23 + 3 x PA1CC + PSU4SA + TR 300 VA
per speaker kit (for one cabinet)
- not available (_)
 

Ground Sound Coolback 600 kit

The Active Speaker Management System is mounted on the back of a speaker. All electronics are assembled on the coolback (back plate) which is acting as a heat sink for the amplifier modules. Visible outside are the connectors (Balanced Input, PC Communication and Power inlet), Function Switch (ON-OFF-AUTO) and LED Indicators (ON-Standby). The Coolback 600 is 220mm wide and 1000mm high - a thickness of 10 mm - a flange of maximum 20mm for mounting.

The coolback has mounting holes for:

  • DCN 23, the Digital Crossover with 24 bits / 96 kHz
  • PA3CC, the Power Amplifiers with 300W per channel
  • PSU12SA Power Supply with 12 Audio Grade Caps
  • the Transformer TR 600 with 300 VA in Toroidal Silent Design
  • accessories (Neutric input and power connectors)

Coolkit 602 - 2 way kit 600W

It contains:
DCN 23 + 2 x PA3CC + PSU12SA + TR 600 VA
per speaker kit (for one cabinet)
- not available (_)
 

Coolkit 603 - 3 way kit 600W

It contains:
DCN 23 + 3 x PA3CC + PSU12SA + TR 600 VA
per speaker kit (for one cabinet)
- not available (_)
 

Coolkit 604 - 3 way kit 600W with bridged subwoofer output

It contains:
DCN 23 + 4 x PA3CC + PSU12SA + TR 600 VA
per speaker kit (for one cabinet)
- not available (_)
 

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