BSS Audio FCS-966 Owner's Manual - Manual (Page 5)

Mechanical Installation
1.0 Mechanical installation
A vertical rack space of 3U (5 1/4" - 133.5mm high) is required, with a depth
of 190mm, excluding connectors. Ventilation gaps are unnecessary.
If the unit is likely to undergo extreme vibration through extensive road
trucking and touring, the unit must be supported at the rear and/or sides to
lessen the stress on the front mounting flange. The necessary support can
generally be bought ready-built, as a rack tray, or the FCS 966 can be mounted
between other units. Damage caused by insufficient support is not covered
by the warranty. To prevent cosmetic damage to the front panel paint finish,
always use protective plastic cups under the rack mounting bolts.
As with any low-level signal processing electronics, it is best to avoid
mounting the FCS 966 next to a strong source of magnetic radiation or heat,
for example, a high power amplifier.
Fig 1.1 Unit dimensions.
Fig 1.2 Rack dimensions.