6
KEF
T Series Technologies Explained
• A satellite designed for maximum bass when used on its own does not integrate well with a
subwoofer.
• A satellite designed specifically for use with a subwoofer integrates well.
All of this means that the T2 is an ideal subwoofer if you want a
‘no compromises’ performer without the hassle of a large box
that just doesn’t look right in your room; whether you are
listening to your favourite music or watching the latest
Hollywood blockbuster.
PART II -
T SERIES TECHNOLOGIES
VENTED TWEETER
The T-Series has a Vented Tweeter. This increases the amount of air
enclosed behind the dome to reduce distortion of the sound.
An Analogy
Imagine two mattresses made from the same type of foam, one
thick and one thin. Most people would find the thick mattress
more comfortable. This is because their weight on the thin
mattress compresses it to the point that they can feel the hard
bed slats beneath. The extra material of the thick mattress means
it is not compressed fully and thus still feels soft and springy.
Air Behind the Tweeter Dome
The dome of a tweeter vibrates the air around it, in front of the
dome this vibration is propagated away as sound, to the rear is
an enclosed pocket of air. The dome pushing on the enclosed air
experiences something similar to the person on the mattress. If
the enclosure is too small the air undergoes large compressions
and expansions. It will behave in a non-linear manner and cause
distortion. This can be compared to the discomfort of laying on
the thin mattress. In a larger enclosure the compressions and
expansions are relatively small. The air in this case will act as a
spring and the sound we hear will have much lower distortion.
The image above shows the behaviour of the tweeter vent. Rear
radiation from the dome travels down the duct and is gently
absorbed in the acoustic damping material.
