USER MANUAL HEADLINES LAB 1600 USER MANUAL Unpacking 2 Warnings 2 User responsibility 2 1. 2. 3. Speaker damage Speaker output hazard. Radio interference. Introduction 1. 2. Installation 1. 2. 3. 4. 5. 6. 7. 8. 1. 2. 3. 4. 5.
Unpacking User responsibility 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 with the carrier, for damage incurred during shipping. Be sure to save the carton and packing materials for the carrier's inspection.
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/protection handle Both handles can be used to carry the amplifier, they also act as protection for the front 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). 6. Link switch Allows a single input to drive both channels simultaneously. (See page 7). 7. 2. Clip limiter switch. Turns the clip limiter on and off. Input jack Alternative to using input XLR or for linking inputs with other amplifiers. (See page 5).
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.
SLEEVE SHIELD/GROUND Figure 4. TRS phone plug This is similar to the connection for balanced lines, but pin 3 is tied down to shield, at the source side instead. The hum and noise rejection for the cable is equivalent to that for a balanced line. To minimize hum in the audio, use balanced inputs whenever possible. 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.
matching, so you can drive the LAB 1600 in 2 ohms without increased heat losses. The chart below shows the possible combinations: 8. Impedance matching (MLS-switch) The MLS switch is located on the rear panel with a LED indicator showing then the switch is depressed and in the 2 ohms position.
4. Stereo reverse This mode is similar to the Tandem mono mode. Apart from depressing the Link switch , you also depress the Phase reverse switch, like in the Bridge mono. Channel B is now phase reversed. To compensate for that, connect pin +1 on channel B Speakon to speaker negative terminal and pin -1 on channel B to speaker positive terminal. Channel A output is connected as in the normal stereo mode.
• • When the clip limiter is engaged it flickers briefly. When the clip limiter is not engaged it lights for a longer period. Protection features Each LAB.GRUPPEN amplifier has many advanced protection features, that will protect both the amplifier and the speakers connected to it, should a fault condition arise. Under normal use these features are inaudible. All protection circuits are independent.
D.C. protection There are two types of DC protection: Fuses on the supply branches of each channel (this is an IEC 65 requirement). A Crowbar bar protection that shorts the output. Both these circuits come into effect once a DC level of 10 volts or more is detected on either channel. Design features Light weight The switch mode amplifiers has a very good power to weight ratio.
LAB.GRUPPEN amplifiers are designed to meet the IEC65, a stringent electrical safety approval from the International Electro-technical Commission. The IEC65 is recognized world-wide with most countries having an equivalent. EMC approvals EMC stands for Electro Magnetic Compatibility. This implies that the equipment should have low emission of radio frequencies, directly as electromagnetic fields in the air, and as conducted from the cables from and to the unit.
Appendix A Mains voltage selection LAB 1600 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 1600 is unplugged from the mains voltage. 2. Remove the top and bottom cover. 3. If the four electrolytic capacitors close to the front are rated 385VDC, the amplifier is for 230 volt operation only 4.
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.
