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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.
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. Removal of the cover will expose hazardous voltages.
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.
QKP= oÉ~ê=m~åÉä= Figure 2. Rear Panel 1. Output / Speaker connector The Speakon connector from Neutrik® may be unfamiliar to some users. A full description is found in the operation section. (See page 11). 2. Clip limiter switch Turns the clip limiter on (switch IN position) or off (switch OUT position). (See page 13). 3. Input signal XLR. Neutrik® Combojack features also ¼” TRS phone jacks. (Pin 2 is “hot”, see page 10). 4. Link Output. 3-pole screw terminal of Phoenix brand.
the amplifiers. There are eight positions with different gain, from 20dB to 41dB in 3dB steps. See the different settings for the DIP-switches in the table below. The three switches to the very left are for channel B, and the three to the very right are for channel A. RKNKO= pÉåëáíáîáíó= Sensitivity is defined as how many volts (rms) or dBu (referred to 0.775Vrms) are required to get full output power. As the output power varies with the load impedance, usually 4 ohms is the reference.
Reverse operation of Channel B. RKPKP= q~åÇÉã=ãçÇÉ= In tandem mode both channels' inputs are linked and receive the same signal. The tandem mode is active if the Link switches are in position "On". Both level attenuators are active, allowing you to set different levels for each channel. Note that only the inputs are connected in parallel. This is NOT a parallel output mode. Never connect either output terminal to ground or in parallel.
S= fkpq^ii^qflk= SKN= jçìåíáåÖ= The amplifier is one rack unit high (1U) and will mount in a standard EIA 19” rack. Amplifiers may be stacked directly on top of each other. If the average power is above 1/8 of full power, spaces between units and/ or forced air cooling may be used. If it is the intention to fill a rack with amplifiers, we recommend racking be started from the bottom of the rack.
SKR= mçïÉê=Åçåëìãéíáçå= There are three ways to determine the power/current consumption of the amplifier: First, the peak current draw at full output power. Under this condition the power will blow the mains breaker within 30 seconds, or the amplifier will operate for less than 2 minutes before thermally limiting. Therefore it is meaningless to state the input power at full power. The heat power at full power will anyway be limited by the protection circuits.
The chart below shows the heat power produced in watts, in kcal per hour, and also in BTU per hour. HEAT POWER iP 450 note 1 note 2 8 ohms 4 ohms 2 ohms 1/3 Power(1) 1/8 Power (2) 1/3 Power(1) 1/8 Power (2) 1/3 Power(1) 1/8 Power (2) [W] [W] kcal / h kcal / h BTU / h BTU / h 97 60 80 50 330 200 143 90 120 80 490 310 222 125 190 110 760 430 Average power with music as program source. The amplifier driven to clip level. Normal music power with 9dB headroom, IEC standard power rating.
TKNKO= råÄ~ä~åÅÉÇ=áåéìíë= To connect an unbalanced input source, connect pins 1 and 3 in the cable’s XLR plug (ring and sleeve in a TRS plug). If you leave a pin disconnected, you will lose 6dB. A better method for using unbalanced sources is shown in figure 8. This is similar to the connection for balanced lines, but pin 3 is connected to the shield at the source end of the cable. The hum and noise rejection for the cable is equivalent to that of a balanced line.
U= lmbo^qflk= UKN= léÉê~íáçå=éêÉÅ~ìíáçåë= • Make sure that the power switch is set to “off” before connecting any input or output or operating the switches on rear panel. See pages 8 about installation. • Make sure that the AC mains voltage is correct and the same as the one printed on the rear panel of the amplifier. See pages 8, about operating voltage and power consumption.
V= molqb`qflk=cb^qrobp= Each Lab.gruppen amplifier has many advanced protection features, protecting 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. VKNKN= `äáé=iáãáíÉê= The clip limiter is included to prevent from dangerous clipped signals reaching the speaker and damaging it.
NM=j^fkqbk^k`b= Under normal use the amplifier should provide years of trouble-free service. 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 dusty environments. If you are using your amplifier for heavy duty use i.e. concert touring or industrial music it is recommended that you have your amplifier serviced every 3 years, purely as a preventative measure.
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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.
