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:
1On a soft, padded surface, carefully lay your subwoofer on its side to gain access to the bottom.
2Remove 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.
3By 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.
5Adjust to level by rotating spikes. By hand, tighten the jam nut snugly against the cabinet when you are satis- fied that subwoofer is level.
Figure 18. The ETC™ Spike.
Caution: Walking the subwoofer may result in a broken spike.
18 Room Acoustics