User manual headlines unpacking 2 warnings 2 user responsibility 2 1. Speaker damage 2. Speaker output hazard. 3. Radio interference. Introduction 3 1. Front panel 2. Rear panel installation 4 1. Mounting 2. Cooling 3. Operating voltage 4. Grounding 5. Power consumption 6. Input connections 7. Conne...
Carefully open the shipping carton and check for any noticeable damage. Every lab.Gruppen amplifier is tested and inspected before leaving the factory and should arrive in perfect condition. If found to be damaged, notify the shipping company immediately. Only the consignee may institute a claim wit...
3 introduction thank you for purchasing a lab.Gruppen power amplifier. This manual contains important information on operating your amplifier correctly and safely. Please take some time and read this manual to familiarize yourself with the amplifier. The front panel figure 1. Front panel 1. Carry/pr...
4 the rear panel figure 2. Rear panel please refer to diagram on page 3 1. Speaker connector this type of speaker connector may be unfamiliar to some users. A full description is found in the operation section. (see page 6). 2. Ac line cord (see page 5). 3. Input jack alternative to using input xlr ...
Brown live blue neutral green/yellow earth once the ac connector is connected to a suitable ac supply, the amplifier can be started with the ac actuator. When you power up the amplifier, the fan then blow at high speed before going onto "idle" and the 2 bottom green led’s come on to show the output ...
6 figure 3. Xlr input connector pinout there are also trs jacks for linking etc. They are wired as follows: tip hot ring cold sleeve shield/ground figure 4. Trs phone plug the input impedance is high enough (20 kohms balanced) to allow ”daisy-chaining”, or multiple parallel input connections. To dai...
7 fi gure 8. Balanced line with unbalanced equipment 7. Connecting speakers speaker connections are made via the two neutrik nl4fc speakon connectors (1). They are the only connectors currently available to meet the ec safety requirements. They are wired in the following manner: pin -1 speaker groun...
8 2. Tandem mono for tandem ( dual channel-single input) operation , depress the link switch. Both channels can now be driven by a signal, at either input connector. The output connection is the same as in stereo mode. You can use either trs connectors for linking out etc. Do not use the remaining x...
The upper position setting, which has a sensitivity of 0 db for full power in 4 ohms. Figure 12. Front indicators 4. Indicators the two bottom green ”on” leds indicate that the output circuits are receiving the correct rail voltage. The ”-25 db” leds glow when the output signal is greater than -25db...
Design features cooling the lab.Gruppen amplifier runs very cool due to a patented heat sink called intercooler tm . The output devices (bi-polar) are mounted directly on a copper heat sink thereby avoiding thermal losses normally found when using mica washers (the heat sink is mounted horizontally ...
11 appendix a mains voltage selection lab 500 is normally shipped for 230 volt ac operation only. For export there is a 115/230 volt ac option available. To check if the amplifier is equipped with this option, please follow these steps: 1. Make sure that the lab 500 is unplugged from the mains volta...
Warranty and disclaimers • general this product is manufactured by lab.Gruppen and is warranted to be free from defects in components and factory workmanship under normal use and service, for a period of one year from the date of original purchase. During the warranty period, lab.Gruppen or its nomi...
