Lab.gruppen C 68:4 Operation Manual
C series installation-dedicated amplifiers
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Summary of Contents for Lab.gruppen C 68:4
- Page 1 Operation manual C Series: Installation-Dedicated Amplifiers C 68:4 • C 48:4 • • C 28:4 C 16:4 • Rev. 2.01 Part no. UM-CS...
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Page 2: Table Of Contents
1 CONTENTs 1 CONTENTS .............................. APPROVALS ..............................4 3 WARNINGS ..............................4 Explanation of graphical symbols ......................4 3.1.1 WARNING ..........................4 3.1.2 CAUTION..........................4 3.2 Important Safety Instructions ......................4 3.3 User responsibility ..........................5 3.3.1 Mains connection grounding ....................5 3.3.2 Speaker output hazard ......................5 3.3.3 Radio interference ........................5 3.3.4 Speaker damage ........................5 3.3.5 Maintenance ..........................5... - Page 3 CONTENTs 1 7.4.2 Output operation and connection ...................16 7.4.3 Output bridge mode .......................16 7.4.4 Amplifier Gain .........................17 7.4.4.1 Channel gain / Level (front panel pots) ................17 7.4.4.2 Amplifier sensitivity .......................17 7.4.5 Output Voltage Peak Limiter (VPL) ..................17 7.4.6 Constant Voltage 70 V and 100 V systems setup and operation ..........18 7.4.7 Current Peak Limiter, (CPL) ....................18 Protection, faults and warnings ......................18 7.5.1 Introduction ..........................18...
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Page 4: Approvals
2 APPROVALs 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. Standards applied: EMC Emission EN55103-1, E3 EMC Immunity EN55103-2, E3, with S/N below 1% at normal operation level. Electrical Safety EN60065, Class I This equipment is tested and approved according to the U.S. -
Page 5: User Responsibility
WARNINGs 3 • Check if the affected unit complies with the EMC 3.3 user responsibility limits for immunity, (CE-labeled). If not, address the problem with the manufacturer or supplier. All electrical products sold in the EC must be 3.3.1 Mains connection grounding approved for immunity against electromag- Your amplifier must be connected to a netic fields, high voltage flashes, and radio inter-... -
Page 6: Welcome
Lab.gruppen the benchmark of quality for touring Thank you for choosing Lab.gruppen C Series power concert systems: exceptional sonic performance, amplifiers for your sound reinforcement system rugged construction, proven reliability, and protection installation. -
Page 7: Voltage Peak Limiter
PAL, Power Average Limiter limits the maximum • Lab.gruppen’s proprietary DeviceControl editor average power consumption according to the software to automatically create a precise picture of all power supply and mains-breaker capabilities. -
Page 8: Installation
Carefully open the shipping carton and check for any supply cools to safe operating temperature. An early noticeable damage. Every Lab.gruppen amplifier is warning before shut down will be indicated on the tested and inspected before leaving the factory and front panel LEDs, and a warning will be sent through should arrive in perfect condition. -
Page 9: Grounding
INsTALLATION 5 amplifier can be turned on using the front panel power switch. The amplifier then goes through a soft-start sequence as it self-checks its circuits. The fans will blow at high speed before dropping to idle, and the “power” LED will illuminate. Inrush power is controlled and limited during “soft start”, enabling multiple amplifiers to be powered up simultaneously. -
Page 10: Quick Guide Overview
6 QUICK GUIDE OVERVIEW 6.1 front Panel overview The amplifier’s front panel presents the performance Temperature warning (Yellow flashing) Temperature mute (Yellow constant) and fault condition indicators, power and remote Very High Frequency protection active (output muted) (Yellow) switches ,and a removable dust-filter cover. Four Mute channel via NomadLink network level potentiometers located behind the cover (2x Yellow) -
Page 11: Rear Panel Overview
QUICK GUIDE OVERVIEW 6 6. Rear Panel overview SPEAKER OUTPUTS 44dB Ser. N:o Removed! 141V* WIRING 41dB NORMAL: CLASS 2 38dB 118V BRIDGED: CLASS 3 200-240VAC 50-60Hz :2300W BALANCED INPUTS 35dB 100V** PUSH PUSH CH D CH C CH B CH A 32dB 29dB... -
Page 12: Nomadlink / Ethernet Network Setup
All features of the NomadLink network are The OUT port from the NLB 60E must be connected accessible via a PC running Lab.gruppen’s proprietary to the IN port of the first amplifier. The OUT port DeviceControl software. A single rackspace network... - Page 13 C Series Operation Manual 13...
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Page 14: Operation And Performance
7 OPERATION AND PERFORMANCE Overall amplifier input gain is adjusted using the 7.1 Introduction input stage DIP switches. Please note that the gain setting is global, affecting all four channels. Following the input stage, the dedicated level control on each The following sections provide comprehensive infor- channel allows signal attenuation from 0 dB to minus mation on amplifier connection, setup, operation, and... -
Page 15: Headroom, Sensitivity And Vpl / Gain Settings
The tables to the left of the drawing below, show clip level, you are in danger of clipping the input stage input sensitivity for C 68:4 with an 8 ohm load and before the current or voltage peak limiters are 141 Vpeak (max.) and 42 Vpeak (min.) respectively... -
Page 16: Audio Input And Output Connections, Setup And Features
7 OPERATION AND PERFORMANCE 7.4. Output operation and connection 7.4 Audio Input and Output con- nections, setup and features 7.4.1 Balanced / unbalanced Input connection Screw-terminal connectors with + and – poles are provided at each channel output for connection of the speakers. -
Page 17: Amplifier Gain
OPERATION AND PERFORMANCE 7 7.4.4 Amplifier Gain the common reference. All C Series amplifiers feature adjustable input gain. Since C Series amplifiers are capable of providing This versatility enables the amplifier to accommodate multiple maximum output power levels through use a multitude of system configurations with various of the VPL feature, many sensitivity calculations input sources and speaker layouts. -
Page 18: Constant Voltage 70 V And 100 V Systems Setup And Operation
The Safe Operating Area Detector (SOAD) compares four C Series models are: output voltage against output current to ensure that the output transistors are working inside their safe • C 68:4, 24,5 A per channel operating area. • C 48:4, 17,5 A... -
Page 19: Dc Protection
OPERATION AND PERFORMANCE 7 signals do not appear in “natural” sources such as prevent measurement of full peak output power. music. Any such signals can therefore be considered (Output will be muted long before maximum output as a fault when present. VHF protection is essential power is attained.) To measure the true peak output in avoiding damage to high frequency drivers. -
Page 20: Temperature Protection
7 OPERATION AND PERFORMANCE 7.5.7 Temperature protection and in a controlled manner ensuring that breakers will not trip. Thermal measurement points are provided on each output channel as well as on the power supply. These Several amplifiers will, under normal conditions, be indicators will, if the pre-specified temperature level able to be powered up simultaneously. -
Page 21: Front Panel Monitoring And Adjustments
OPERATION AND PERFORMANCE 7 8.6. Level adjust 7.6 front panel monitoring and adjustments Step Attenuation 1 (Min) -Inf. dB 7.6.1 Level indicators -Inf. dB -50 dB Four signal/level/clip LEDs per channel are contained -40 dB on the C Series front panels : -35 dB -21.5 dB -21.5 dB... -
Page 22: Performance, Warning And Fault Indicators
7 OPERATION AND PERFORMANCE 7.6.4 Performance, Warning and fault indicators Power on/off (green) indicates that mains power • is switched on. NomadLink (blue) indicates that the network • is connected. The NomadLink LED will light up even before the mains power is connected and switched on as it takes phantom power from the network cable. -
Page 23: Nomadlink Network And Pc Editor
Cat5 (or better) and RJ45 is utilized, network performance may be compromised. In this When the NLB 60E bridge is powered up, the event Lab.gruppen cannot guarantee that NomadLink network receives phantom power. the NomadLink network will be fully operational. -
Page 24: Nomadlink Network Cable Lengths
7 OPERATION AND PERFORMANCE 7.7.3 NomadLink network cable lengths • Rule 1: The maximum cable length in between any two In situations where the amplifiers and the NLB 60E devices may not exceed 300 meters / 980 feet. will be positioned in different locations at some Rule 2: •... -
Page 25: Ethernet Network Cable Lengths
PC follow standard rules for Ethernet systems. Contact your IT expert for more details. 7.7.5 deviceControl editor The DeviceControl editor is Lab.gruppen’s proprietary software application for monitoring and controlling networked C Series power amplifiers. DeviceControl runs on a Windows PC, which connects via Ethernet to the NLB 60E network bridge. -
Page 26: Appendix
Following are common questions asked about Lab.gruppen C Series power amplifiers together with q: How can I be sure that no protection circuits or helpful answers. -
Page 27: Additional Documentation
APPENDIX 8 8.4 Additional documentation In case you didn’t find what you were looking for in this Operation Manual, check out the website at www.labgruppen.com, where you can find a multitude of additional documentation for C Series: Drawings, technical data sheets, tables with input sensitivity, background technology briefs and much more. -
Page 28: Btu Specifications
The following tables contain information on measured current consumption as well as calculated heat dissipation at three states: 1) Stand-by/idling; 2) Normal operation (1/8 of rated power); and 3) at extreme heavy duty operation (Max. power). C 68:4 Rated Line Current... - Page 29 APPENDIX 8 C 28:4 Rated Line Current Watt Thermal Dissipation Level Load power 115VAC 230VAC BTU/hr kCal/hr Dissipated Standby w. remote Power Off via NomadLink Power On, Idling Amp (I) 1/8 of 700 x4 8 Ω / Ch. 11,6 1286 rated 16 Ω...
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Page 30: Technical Specifications
Following are the C Series technical specifications. These figures are accurate at the time of printing but please note that all figures are subject to change without notice. For the most accurate and current information available, please visit www.labgruppen.com. Individual values for C Series amplifiers C 68:4 C 48:4 C 8:4 C 16:4... - Page 31 TEChNICAL sPECIFICATIONs 9 Common values for all C Series amplifiers Performance with Gain: 35dB and VPL: 141V THD 20 Hz - 20kHz for 1W 0.1% THD at 1kHz and 1dB below clipping 0.05% Signal To Noise Ratio 112 dBA Channel separation (Crosstalk) at 1kHz 70 dB Frequency response (1 W into 8 Ohm) +0/-3dB 6.8 Hz - 34 kHz...
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Page 32: Warranty
(6) years from your Lab.gruppen dealer or distributor, or contact date of purchase from an authorized Lab.gruppen Lab.gruppen by fax or email to obtain the location dealer. of the nearest authorized service centre. - Page 33 L a b . g r u p p e n a b • S w e d e n • & + 4 6 3 0 0 5 6 2 8 0 0 T C e L e C T r o n i C i n C u S a • & ( 8 1 8 ) 6 6 5 4 9 0 0 ] i n f o @ L a b g r u p p e n .
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