4
Overview
(continued)
In our Regenerative Transmission Line
TM
subwoofer, the energy from the back side
of the driver is sent along a long, folded path in such a way that its lowest
frequencies arrive back at the front side of the driver in phase, effectively summing
to an increase of 6 dB in output. Thus, the energy from both sides of the woofer
cone is used in a productive way, resulting in a substantial reduction in distortion
and an effective surface area double compared to what you would otherwise
expect. As an example, the effective radiating surface area of the two 5”x7”
woofers in the S90 is equivalent to
a
12”-13” woofer in more conventional
enclosures.
The results are quite stunning. Low frequencies are strikingly dynamic and
responsive and integrate quite seamlessly with the fast and detailed Sage Series
planar magnetic hybrids. As an example, the S90 has an output in excess of 123
dB at 20 Hz.
Unpacking the S90
The Wisdom Audio S90 subwoofer is a substantial piece of equipment. Please
exercise caution when unpacking your S90 to ensure that you do not strain yourself
from its (perhaps unexpected) weight.
CAUTION:
Do not
attempt to lift your S90 by yourself. Unpacking this subwoofer is clearly a
two-person job. It is unwise for a single person to attempt doing so.
Do not
attempt to lift your S90 while bending or twisting from the waist. Use your
legs for lifting, not your back.
Always
stand as straight as possible and keep the S90 close to your body to reduce
strain on your back.
