1 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. Denmark: national deviat...
2 unpacking 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...
3 introduction thank you for purchasing a lab.Gruppen power amplifier. The amplifier you have chosen is the culmination of many years of research and development. This amplifier makes amplification more controllable instead of the traditional "boring black box" you have become accustomed to. Please ...
4 the rear panel figure 2. Rear panel 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 7). 2. Mls™ switches these switches are used to select the maximum output power . (see page 7). 3. Clip limiter s...
5 lab.Gruppen switch mode amplifier use primary switching, i.E. The mains is rectified directly before the transformer, which means that the power supply is insensitive to the mains frequency and will operate from dc to 400 hz. The amplifier is supplied with an approved european ac line connector. I...
6 the power consumption according to the chart above is then 1300 watts. The heat power produced is the difference between the power consumption and output power; 1300 - 525 = 775 watts per amplifier. 8. Input connections xlr input connectors are balanced and wired according to the iec 268, that is ...
7 9. 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 ground. Pin +1 speaker positive. Pin -2 no connection. P...
8 operation modes 1. Stereo operation for stereo (dual channel ) operation, leave the link and phase reverse switches in the undepressed position. In this mode, both channels operate independently of each other, with their level attenuators controlling their respective levels. Never connect either o...
9 2. Powering up -soft start 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 onto "idle" and the two bottom green led’s come on to show the output circuits a...
10 this is a useful feature as there are currently no commercially available compression drivers that can take 500 watts of power at 10 khz!! This circuit is inaudible under normal use, however it can be turned off. If the vhf protection is required to be turned off i.E. For studio monitors, please ...
11 2 1 3 0 10 20 30 40 50 60 70 80 90 0 5 10 15 20 25 30 35 40 45 50 current [a voltage [v] figure 14. Current-voltage characteristic of different power supply topologies. 1) conventional power supply show voltage drop due to internal resistance 2) regulated power supply used by lab. 3) unregulated ...
12 lab 4000 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 4000c is unplugged from the mains voltage. 2. Remove the top and bottom...
13 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 n...
