MartinLogan Depth subwoofer - Manual (Page 15)

After living and experimenting with your Depth, you may
want to use the ETC ™ (Energy Transfer Coupler) Spikes
(see figure 17), included with your Depth. With the use of
these spikes, the Depth subwoofer will become more firmly
planted on the floor and, consequently, bass will tighten. 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 subwoofer is moved. MartinLogan ETC spikes
will fit any common 1 /
4
inch thread insert that may be found
on your other audio equipment (racks, speakers, etc).
Spike Installation Instructions:
1 Carefully remove the grill cloths from your Depth.
2 Carefully lay the Depth on its side to gain access to the
bottom.
3 Remove existing feet or spikes. Thread new spikes into
holes and screw them in all of the way.
4 Tighten jam nut snugly by hand. Do not over tighten
the nut.
5 Right the subwoofer.
Caution: Make sure your hands and any cabling are
clear of the spikes. Do not slide the subwoofer as spikes
are sharp and can damage your floor or carpet.
6 Adjust to level by rotating spikes. Tighten the jam nut
securely when satisfied that the subwoofer is level.
Caution: Walking the Depth may result in a broken spike.
Room Acoustics 15
Solid Footing
Figure 17. The ETC Spike.