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Gallery 2

Smaller "Coolback" 3-way active setup
With the dimensions of only 15cm width x 75cm height it is possible to fit this "Coolback" in a small to
medium size 3-way loudspeaker enclosure - providing enough power to drive a normal hifi loudspeaker

Aluminium sheets prepared for anodizing

Electronics and aluminium ready for assemble

All modules mounted except PSU4SA

Power cables has to be fitted on the bottom side of PSU4SA

Cables from the transformer have been assembled

Power cables fitted to PA1CC - important that the cables to each amplifier are twisted to avoid crosstalk
It is more important to have twisted cables than large square area cables !

All cabling are done

Close up of the DCN23 and PC-interface connector

No problems will apeare making a "highway" of power cables

You might think that the transformer is too small only 200VA
- but the fact is that music has a crest factor of 12dB and often you need less power for the tweeter than the bass

Close up of PSU4SA mains and Neutrik Powercon

Operating switch with a little bit of silicone

PA1CC will provide about 100W / 8Ω in this configuration

Now - you only need suitable drivers and enclosure

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© Ground Sound * Product of Denmark