Rega RS10 - Manuel (Page 5)

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This system eliminates the normal single bass resonance by spreading
smaller resonances across the entire bass frequency band and
incorporates a degree of self damping due to the parallel connection with
the amplifier. The result is a much tighter and more tuneful bass register
which can be adjusted in level to suit room characteristics. The
loudspeaker can also be moved closer to or further from a wall resulting
in an increase or decrease of low frequency to suit personal preference.
ROOM POSITIONING
The RS-10 Loudspeakers use two side firing Bass drive units and a
side firing port. You can position the speakers with the bass drivers
firing in or out, this is dependent on your personal preference, room size
and shape. As a guide, if the bass drivers are firing outwards this will
generally give a larger sound stage, if the bass drivers are firing inwards
this will give more precise imaging.
However, there is no written rule so on installation you should
experiment with different positions to find the optimum placement that
best suits your needs.