Руководство Пользователя для Lab.gruppen fp 1150q

The amplifier is two rack units high (2U) and will mount in a standard EIA 19” rack. Amplifiers may be 
stacked directly on top of each other. There is no need for spacing between units. If it is the intention to 
fill a rack with amplifiers, we recommend racking is started from the bottom of the rack. It is also 
recommended that rear supports are used for amplifiers mounted in the middle of the rack, especially if 
used as part of a portable system. 

Your amplifier uses a forced air cooling system to maintain a low and even operating temperature. All 
fan cooled Lab.gruppen amplifiers have front to rear airflow. There are several reasons for this, one 
being that there is usually cooler air outside the rack than inside, and therefore the amplifiers can run at 
higher continuous power levels without thermal problems. Never try to reverse the airflow, as the 
Intercooler® needs a pressure chamber between the fans and heat sink, and this only works in one 
direction of the airflow. 
Should a heat sink get too hot, its sensing circuit will mute the hot channel. If the power supply 
overheats, another sensing circuit will mute all output channels, until it cools down to a safe operating 
temperature. 
Make sure that there is an adequate air supply in front of the amplifier, and that the rear of the amplifier 
has sufficient space to allow the exhaust to escape. If the amplifier is rack-mounted, do not use covers 
or doors on the front or rear of the rack.  
For installations with a central cooling system, usually found in fixed installations with a dedicated rack 
room, it may be necessary to calculate the maximum heat emission. Refer to Power consumption on 
page 

. 

WARNING! 
A label just below the mains cable on the rear of the amplifier indicates the AC mains voltage, for 
which the amplifier is wired. Connect the power cable only to the AC source referred to on the 
label. The warranty will not cover damage caused by connecting to the wrong type of AC mains. 
 
If the power plug is not appropriate for your country, it can be cut off and wired to a suitable connector in 
the following way: 
 
 
BLACK or BROWN 

 
Once the AC connector is connected to a suitable AC supply, the amplifier can be started with the power 
switch. When you power up the amplifier it takes a couple of seconds to check its circuits (this is known 
as the "soft start" or "slow start" sequence), the fans then blow at high speed before going into "idle" and 
the two bottom green LED’s come on to show the output circuits are receiving the correct rail voltage. 

There is no ground lift switch or terminal on this amplifier. The signal ground is always floating via a 
resistor to chassis and the grounding system is automatic. If a potential above 0.6V presents itself between 
signal ground and chassis ground, a short circuit is introduced between the two, thereby enabling electrical 
protection. If a unit in the system is faulty, its mains fuse will blow, due to this automatic ground system. 
If however you wish to tie the signal ground to chassis, connect the XLR-connector’s shell lug to pin 1. In 
the interest of safety never disconnect the earth pin on the AC power cord.