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10.1 Bass to mid-high alignment
For maximum impact and headroom it is important to accurately set the cross over point and time
alignment when using F81s with your chosen bass system.
Crossover frequency examples
*The final crossover frequency setting will depend on boundary condition and headroom requirements.
Note that the higher the crossover frequency the harder the bass and the less stressed the F81.
For suggested limiter settings see Section 11.
For further crossover advice, go to www.funktion-one.com and click on Settings.
Ensuring good mid-bass impact through crossover
If you want good mid-bass impact from your system, start with Funktion One’s recommended
loudspeaker management bass-to-top system settings. This will ensure that internal driver offsets are
already allowed for.
1) Physically align the relevant F81 and bass systems so that they are as close together as is
practical for good coverage and ensure that they are aimed in the same direction – see below
2) Time align the systems where required using electronic delay to compensate for any physical
offset with respect to the audience chest height – see below
Physical alignment
Typical architectural layouts require the bass enclosures to be on the floor or under seating and call for
the mid-high enclosures to be flown just above head height.
If you’re catering for a flat-floor audience, ideally mount your F81s so that the front of the enclosure is
directly above the front of the bass enclosure at a height of 2.8m – 3.3m.
Aim the F81s towards ear height about 2/3 of the distance down the audience area.
Fig 10.1-1 If possible, mount your main F81 loudspeakers so that the front
of the enclosure is directly above the front of the bass enclosure
www.funktion-one.com © Funktion One Research Limited 2011
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