Solid Footing
After living and experimenting with your subwoofer, you
may want to use ETC (energy transfer coupler) spikes sup-
plied with the subwoofer (see figure 18). With the use
of these spikes, the subwoofer will become more firmly
planted on the floor and, consequently, bass will tighten
and imaging will become more coherent and detailed. It
is best not to implement the spikes, however, until you are
secure in the positioning, as the spikes can damage the
floor if the speaker is moved. The feet that attach to the
bottom of the Descent i use a common 3/8 - 16 thread.
Spike Installation Instructions:
1 On a soft, padded surface, carefully lay your subwoofer
on its side to gain access to the bottom.
2 Remove existing feet or spikes. Thread new spikes into
holes and screw them in all of the way. If the subwoofer
does not sit level loosen one spike until level is achieved.
3 By hand, tighten the jam nut snugly against the cabinet.
Do not over tighten the nut.
4 Right the speaker.
Caution: Make sure your hands and any cabling are
clear of the spikes. Do not slide subwoofer as spikes
are sharp and can damage your floor or carpet.
5 Adjust to level by rotating spikes. By hand, tighten the
jam nut snugly against the cabinet when you are satis-
fied that subwoofer is level.
Caution: Walking the subwoofer may result in a broken spike.
18 Room Acoustics
Figure 18. The ETC™ Spike.