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. Conn...
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 a...
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...
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. Clip limiter switch. Turns the clip limiter on and off. 3. Input jack alternative to using input xlr or for li...
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 cord. For all units that are emc approved (radio inter...
Figure 4. Trs phone plug the input impedance is high enough (20 kohms balanced) to allow ”daisy-chaining”, or multiple parallel input connections. To daisy chain, use the trs jacks provided on each channel. The input circuits also have a high enough headroom, to accept the maximum output level from ...
Never connect either output terminal to ground or in parallel . The recommended minimum nominal impedance, for stereo or tandem operation, is 2 ohms per channel. 2. Tandem mono for tandem ( dual channel-single input) operation , depress the link switch. Both channels can now be driven by a signal, a...
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 are receiving the correct rail...
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 con...
Traditional psus behave erratically at certain frequencies, during low frequency cycles (bass), particularly in clip conditions, their output impedance's rise thereby producing uncontrollable speaker cone movement. Under these conditions clip states are more audible. Lab.Gruppen smps produces its ra...
Appendix a mains voltage selection lab 1300c 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 1300c is unplugged from the mains volt...
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...
