8
– CAM150 / CAM60
CAM150 / CAM60 –
9
2
2
3
1
1
SHIELD
COLD
HOT
SHIELD
COLD
HOT
3
SHIELD
COLD
HOT
3
2
1
SLEEVE
TIP
TIP
SLEEVE
TIP
SLEEVE
TIP
SLEEVE
TIP
SLEEVE
SLEEVE
TIP
SLEEVE
TIP
RING
RING
TIP
SLEEVE
RING
5. THERMAL CONSIDERATIONS
The power amplifier within the unit is convection cooled
rather than fan cooled. Heat is drawn away from the
amplifier by the heatsink and radiated through the cooling
vents in the top cover.
When installing, be sure to allow sufficient air space
around the top and rear of the amplifier to allow
adequate cooling for the heatsink. Leave at least one rack
space above and below, and at least 6 inches behind the
chassis to allow proper ventilation.
If the amplifier should overheat, a thermal switch turns
off the power amplifier, allowing the heatsinks to cool
down. Once the amplifier has cooled to a safe operating
temperature, the thermal switch resets and reactivates
the amplifier. If this should occur, identify the cause of the
problem and take corrective action. For example:
• Provide better ventilation
• Install a fan in the rack to move more air
• Make sure the amplifier is not overloaded with too
low of a load impedance or by a short circuit on the
speaker line
RACK MOUNTING
Two rack ears are provided to allow the unit to be fitted
within a standard 19" rack.
Remove two front screws from each side, and securely fit
each rack ear in place. The unit still needs to be supported
underneath, due to the weight of the power and output
transformers.
6. CONNECTIONS
Inputs 1 to 4 use a dual-purpose input connector which can
accept XLR and 1/4" TRS and TS plugs.
The AUX IN uses unbalanced RCA connectors, as does the
MAIN IN and PREAMP OUT.
XLR Connectors
Inputs 1 to 4 can accept 3-pin male XLR connectors, wired
as follows (according to standards specified by the Audio
Engineering Society):
XLR Balanced Wiring
Pin 1 = Shield
Pin 2 = Hot (+)
Pin 3 = Cold (–)
1/4" TRS Phone Plugs and Jacks
“TRS” stands for Tip-Ring-Sleeve, the three connections
available on a stereo 1/4" or balanced phone jack or plug.
TRS jacks and plugs are used for balanced signals and
stereo headphones.
1/4" TRS Balanced Mono wiring
Sleeve = Shield
Tip = Hot (+)
Ring = Cold (–)
1/4" TS Phone Plugs and Jacks
“TS” stands for Tip-Sleeve, the two connections available
on a mono 1/4" phone jack or plug. They are used for
unbalanced signals.
1/4" TS Unbalanced Wiring
Sleeve = Shield
Tip = Hot (+)
RCA Plugs and Jacks
RCA-type plugs (also known as phono plugs) and jacks
are often used in home stereo and video equipment and
in many other applications. They are unbalanced and
electrically equivalent to a 1/4" TS phone plug.
RCA Unbalanced Wiring
Sleeve = Shield
Tip = Hot
