Quattro lnb

a Quad lnb allows you to run four lines of a single satellite dish, normal linux receivers use one, twin tuners run two hence the name and sly+ boxes run two.

If you had a receiver in more than two rooms at home, or you had two receivers and one was a twin tuner or two s*y boxes (multi room) etc...

Quote from anniman

When would you need to use one of these and what benefit does it give you. is iy for blocks of flats to connect to a splitter or am i wrong?

Your right mate ! A quatro is for use with a multiswitch for large distribution systems ! they deliver the signal in bands, vertical high vertical low horizontal high and horizontal low
because there are four signal bands there are four outputs ! easy to confuse with a quad that delivers all bands from each output !
the polarity is voltage controlled and the band is switched with a 22khz tone sent from the receiver !

u would have 4 cables going from ur lnb to the distribution unit (not just a simple splitter)

best domestic switch that works with a standard quad is OPTIMA brand ¬ its Visions domestic range and does not require a quatro so you can just take four cables from your existing dish and standard Quad to the optima switch !