Lab.gruppen LAB 500 User Manual

Lab.gruppen lab 500: user guide
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USER MANUAL HEADLINES
Unpacking 2
Warnings
2
User responsibility 2
1. Speaker damage
2. Speaker output hazard.
3. Radio interference.
Introduction
1. Front panel
2. Rear panel
Installation
1. Mounting
2. Cooling
3. Operating voltage
4. Grounding
5. Power consumption
6. Input connections
7. Connecting speakers
Operation modes
1. Stereo
2. Tandem mono
3. Bridged mono
4. Stereo reverse
Operation
1. Operation precautions
2.
Input attenuators
3. Gain switch
4. Indicators
Protections
1.
Clip-limiter
2. Thermal protection
3. VHF protection
4. Short circuit protection
5. D.C. protection
Unpacking

USER MANUAL

3
4
6
7
8
LAB 500
Design features
• Cooling
Safety approvals
EMC approvals
Specifications
EMC-declaration
Appendix A
Mains voltage selection
Maintenance
Troubleshooting
Warranty and disclaimers
General
International
Technical assistance and services 11
International
Factory services
9
9
10
10
10
11
1

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Table of Contents
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Summary of Contents for Lab.gruppen LAB 500

  • Page 1: User Manual

    Input attenuators 3. Gain switch 4. Indicators Protections Clip-limiter 2. Thermal protection 3. VHF protection 4. Short circuit protection 5. D.C. protection Unpacking LAB 500 USER MANUAL Design features • Cooling • Safety approvals • EMC approvals Specifications • EMC-declaration Appendix A •...
  • Page 2: 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.
  • Page 3: The Front Panel

    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...
  • Page 4: The Rear Panel

    Your amplifier uses forced air cooling system to maintain a low and even operating temperature. All Lab.gruppen amplifier, which are fan ventilated, have front to rear cooling. There are several reasons for this, one is that there's usually cooler air outside...
  • Page 5 Use the balanced input to avoid hum and interference. Table 1. MAX OUTPUT POWER LAB 500 8 ohms 4 ohms 2 ohms note 1 Mean power with music as program source The amplifier driven to clip level The current draw can be calculated by dividing the mains input power by the mains voltage.
  • Page 6 Figure 3. XLR input connector pinout There are also TRS jacks for linking etc. They are wired as follows: RING COLD SLEEVE SHIELD/GROUND Figure 4. TRS phone plug The input impedance is high enough (20 kohms balanced) to allow ”daisy-chaining”, or multiple parallel input connections.
  • Page 7: Operation Modes

    gure 8. Balanced line with unbalanced equipment 7. Connecting speakers Speaker connections are made via the two Neutrik NL4FC Speakon connectors (1). They are the only connectors currently available to meet the EC safety requirements. They are wired in the following manner: Pin -1 Speaker ground.
  • Page 8: Operation

    Tandem mono For tandem ( dual channel-single input) operation , depress the Link switch. Both channels can now be driven by a signal, at either input connector. The output connection is the same as in stereo mode. You can use either TRS connectors for linking out etc.
  • Page 9: Protection Features

    0 dB for full power in 4 ohms. Figure 12. Front indicators 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.
  • Page 10: Emc-Declaration

    Design features Cooling The LAB.GRUPPEN amplifier runs very cool due to a patented heat sink called Intercooler output devices (bi-polar) are mounted directly on a copper heat sink thereby avoiding thermal losses normally found when using mica washers (the heat...
  • Page 11: Maintenance

    AC option available. To check if the amplifier is equipped with this option, please follow these steps: 1. Make sure that the LAB 500 is unplugged from the mains voltage. 2. Remove the top cover. 3. Locate the terminal block for the mains cable.
  • Page 12: Warranty And Disclaimers

    Technical assistance and services • International If your LAB.GRUPPEN product needs repair, contact your LAB.GRUPPEN dealer or distributor, or contact LAB.GRUPPEN by fax, to obtain the location of the nearest authorised service centre. • Factory services In the event that your LAB.GRUPPEN product...

Table of Contents