5
4.2 Stand Mounting
The
SB10
has built-in mounting points that are located on two of the sides of the cabinet and are
for use with the Quested stands (see diagram). The position of the mounting points are indicated
on the line drawing on page 13 of this manual. When fixing the stand plate to the loudspeaker:
•
The bolt length must always penetrate at least 25 mm into the cabinet base; the minimum
bolt length is 30 mm.
•
Always use locking washers and thread lock compound.
•
Always use all of the M6 bolts.
•
Because the cabinet is a source of vibration, the bolts must be properly tightened but
caution must be exercised as over-tightening could damage the case. Always tighten the
bolts a little at a time in order to spread the stress over the area of the mounting plate. If a
torque wrench is available the recommended final torque is 6 Nm (4 lbf-feet). A 200 mm
(8”) spanner will achieve the appropriate torque without needing hard work. The mounting
plate holes are sealed by M6 x 16 mm nylon countersunk machine screws. These will need
to be removed before the cabinet can be screwed onto the mounting bracket.
THESE NYLON SCREWS SH OULD NOT BE USED TO MOUNT THE CABINET. THEY ARE
NOT OF
SUFFICIENT STRENGTH. A STEEL MACHINE SCREW OF AT LEAST 30 mm IN LENGTH
SH OULD BE
USED FOR THIS PURPOSE.
If the
SB10
is subsequently removed from the stand, the mounting
holes will need to be re-sealed using the nylon screws or some other suitable sealant.
4.3 Electrical Connection
4.3.1
Safety Earthing
This product has been designed to comply with international safety standards. It is
essential that the green/yellow core of the mains cable, or the ground pin of a 3-pin
moulded plug, is connected to the electrical installations safety earth or ground. It is
internally connected to all exposed metal surfaces and it is essential for personal
safety as well as proper operation of the product. The audio signal in-put is electronically
balanced and does not need the disconnection of any safety earth for the avoidance of
hum loops.
4.3.2
Voltage Setting
The set voltage is indicated on the rear panel of the unit. At this setting there is an
acceptable tolerance over which the performance of the unit will continue to meet its
specifications. (See power requirements on page 12 of his manual.) For the 230V setting
this is 160V to 255V and for the 115V setting it is 80V to 127V. If the unit is connected to
voltages in excess of its maximum, damage is likely to occur which may not be recoverable
from without qualified service attention.
To change the set voltage, the cover must be removed from the
SB
Controller
. The
power and signal cables must be disconnected before continuing. Remove the 10 x M3 Torx
screws from the top cover. Remove the top cover and you will see 4 wires coming from the
mains transformer and connecting to the main PCB board in an area marked as
“transformer” on the PCB. Both the grey and violet wires must be moved to the desired
voltage tap as marked on the board. Be careful to ensure that the crimps are pushed firmly
home and the coloured wires correspond with the printing on the PCB. Replace the lid using
the 10 x M3 screws. You must now change the fuse located in the IEC inlet socket for the
correct one as indicated on the back panel. It is important that you now mark the rear of
the unit with the new set voltage.