ám=VMM= rpbo=j^kr^i= =
N= `lkqbkqp= 1 2 3 CONTENTS .......................................................................................................................................1 APPROVALS.....................................................................................................................................2 WARNINGS ......................................................................................................................................2 3.1 Explanation of graphical symbols ....................
O= =^mmols^ip= This equipment conforms to the requirements of the EMC directive 89/336/EEC, amended by 92/31/EEC and 93/68/EEC and the requirements of the Low Voltage Directive 73/23/EEC, amended by 93/68/EEC. Standard Applied EMC Emission EMC Immunity Electrical Safety EN55103-1, E3 EN55103-2, E3, with S/N below 1% at normal operation level.
15. Do not run the output of any amplifier back into another channel's input. 16. Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been damaged in any way such as: • Power-supply cord or plug is damaged • Liquid has been spilled into the unit • An object has fallen into the unit • The unit has been exposed to rain or moisture • The unit does not operate normally • The unit was dropped or the enclosure is damaged 17. Do not remove top or bottom covers.
Q= fkqolar`qflk= 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 you with the advanced features of this amplifier. QKN= råé~ÅâáåÖ= 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.
7. Fan grill filters A grille with foam filters is located on the front panel to prevent dust from entering the amplifier. The grille is removable for easy cleaning of the filter by simply pulling them off. The foam filter should always be used. 8. Carry/protection handle Both handles can be used to carry the amplifier; they also act as protection for the front panel.
R= ob^o=m^kbi=cb^qrobp= Before turning the amplifier on please read the following sections to make sure that the unit is set up properly for your specific application. RKN= d~áå=ëïáíÅÜ= The gain switch located on the rear panel (the central DIP-switch) changes the input sensitivity of the amplifier. This can be handy when using low or high nominal input signals. E.g.
RKP= léÉê~íáçå=ãçÇÉë= RKPKN= píÉêÉç=ãçÇÉ= In this mode, both channels operate independently of each other. This is used for all 2-channel modes, such as stereo and bi-amping. Set the two center switches to off position for the stereo mode. The level attenuators on the front panel will control the respective channels levels. 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.
RKPKR= _êáÇÖÉ=ãçåç=ãçÇÉ=ÑÉ~íìêÉë= Bridged mono mode combines the power of both channels into one speaker. This results in twice the voltage swing, four times the peak power and just less than three times the full power of a single channel. One way to understand the load and power from the amplifier’s perspective in bridged mode is that it is zero voltage at the center of the voice-coil winding.
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 LIVE WHITE or BLUE NEUTRAL GREEN or GREEN/YELLOW EARTH Once the AC connector is connected to a suitable AC supply, the amplifier can be started with the power switch.
MAX OUTPUT POWER iP 900 note 1 note 2 8 ohms 4 ohms 2 ohms 2x 2x 2x Power [W] 200 320 470 MAINS INPUT POWER 1/3 Power note 1 345 570 930 1/8 Power note 2 235 370 585 Idle 60 60 60 Average power with music as program source. The amplifier driven to clip level. Normal music power with 9dB headroom, IEC standard power rating. Table 1.
Figure 4. XLR input connector Figure 5. XLR balanced Within the Neutrik® Combojack there is a ¼”(6.3mm) phone jack, which is wired in parallel with the XLR. TIP RING SLEEVE HOT COLD SHIELD/GROUND Figure 6. ¼” TRS plug The input impedance is high enough (20 kohms balanced) to allow ”daisy-chaining”, or multiple parallel input connections. The headroom of the input circuits is also high enough to accept the maximum output level from virtually any low-level signal source.
TKO= `çååÉÅíáåÖ=ëéÉ~âÉêë= Speaker connections are made via the two Neutrik® NL4FC Speakon connectors. The Speakon connector is designed for high power speaker connections. It assures the correct polarity, it locks in place and prevents from shock hazard. They are wired in the following manner: The right jack, Channel A, has both channel A and B outputs, so it’s useful for bridging and bi-amp operation (see bridged mono operation on page 7). The left Speakon, Channel B, carries only the channel B output.
UKO= mçïÉêáåÖ=ìé=Ó=pçÑí=ëí~êí= 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 illuminate to show the amplifier is operational. UKP= fåéìí=~ííÉåì~íçêë= The two input level attenuators on the front panel adjust the signal level for their respective amplifier channel in all modes.
Apart from this one exception, Lab.gruppen recommend leaving the clip limiters switched "on" (button depressed). (As a side-effect, once the amplifier comes out of a protect condition, the output level has a slow rise time -the effect is like turning the gain up slowly). VKNKO= qÜÉêã~ä=éêçíÉÅíáçå= If the amplifier is driven very hard into a low impedance load, the cooling fans will run at high speed.
NM=j^fkqbk^k`b= Under normal use the amplifier should provide years of trouble-free service. The only user maintenance required by the user is to vacuum the front grill periodically. In some extreme cases it may be necessary for authorized service personnel to clean the inside of the amplifier. These conditions usually occur after prolonged use, e.g. in environments using "cracked- oil" smoke machines. If you are using your amplifier for heavy duty use i.e.
NN=pmb`fcf`^qflkp= i~ÄKÖêìééÉå== = = = rëÉê=j~åì~ä===ám=VMM====sÉêëáçå=MKP======OMMPJMOJOR= = = ========================NS
NO=t^oo^kqv= 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 three (3) years from the date of original purchase from an authorised Lab.gruppen dealer.
