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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.  Powering up -Soft start 
3. Input 

attenuators 

4. Gain 

switch 

5. Indicators 
 

Protections  

1. 

Clip-limiter

 

2. Thermal 

protection 

3. VHF 

protection 

4.  Short circuit protection 
5.  AC mains voltage protection 
6. D.C. 

protection 

 
 
 
 

 
 
 
 

 

LAB 1300C 

USER  MANUAL 

 
 
Design 

features 

  9 

• 

Cooling 

• 

Light weight 

• 

Regulated power supply 

• 

Safety approvals 

• 

EMC approvals

 

 
Specifications 

   10 

• 

EMC-declaration

 

 
Appendix A 

               11 

• 

Mains voltage selection

 

 
Maintenance 

                11 

 
Troubleshooting 

                11

 

 
Warranty and disclaimers   

12 

• 

General 

• 

International

 

 

Technical assistance and services  12 

• 

International 

• 

Factory services

 

 

 

1

Summary of Contents for LAB 1300C

Page 1: ...on 7 1 Operation precautions 2 Powering up Soft start 3 Input attenuators 4 Gain switch 5 Indicators Protections 8 1 Clip limiter 2 Thermal protection 3 VHF protection 4 Short circuit protection 5 AC mains voltage protection 6 D C protection LAB 1300C USER MANUAL Design features 9 Cooling Light weight Regulated power supply Safety approvals EMC approvals Specifications 10 EMC declaration Appendix ...

Page 2: ...oth loudspeakers and humans alike Many loudspeakers can be easily damaged or destroyed by overpowering especially with the high power available from a bridged amplifier Always check the speakers continuous and peak power capabilities Even if the gain is reduced by using the amplifier s front panel attenuator it is still possible to reach full output power if the input signal level is high enough 2...

Page 3: ...ate above its maximum operating temperature 90o C The indicator first comes on as a warning to either turn down the input level or check the cooling arrangements after which point the amplifier will mute the input signal When the cooling fans have returned the output heat sinks to the normal operating temperature the input signal is unmuted 4 VHF protection indicator This indicator lights when con...

Page 4: ...until it cools down to a safe operating temperature Make sure that there is an adequate air supply in front of the amplifier and that the rear of the amplifier has sufficient space to allows the exhaust to escape If the amplifier is rack mounted do not use covers or doors on the front or rear of the rack For fixed installations with a central cooling system usually found in fixed installations wit...

Page 5: ...h of the total power is as loud as you can play music while making some attempt to avoid obvious clipping It also corresponds to a headroom of 9dB which is very low for an audio program In 2 ohms operation the protection of the amplifier circuit will not permit long term current draw and the component temperature rise will stabilises well below the rating MAX OUTPUT POWER MAINS INPUT POWER Power F...

Page 6: ...e 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 Pin 1 Speaker positive Pin 2 No connection Pin 2 No connection Figure 9 Speakon connector Please note that this is the standard wiring convention for Speakon connectors adopted world wide Never connect either output...

Page 7: ...hms Driving bridged loads of less than 4 ohms may cause a thermal overload Figure 10 Bridge mono connection Both level attenuators must be at the same position We recommend you to put them in the 0 dB full 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 ph...

Page 8: ...below 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 Clip limiter The clip limiter is included to prevent dangerous clip signals reaching the speaker and damaging it It works ...

Page 9: ...a pressure chamber The air flow is constant along the whole heat sink thanks to a horizontal pressure chamber in front of it in a conventional tunnel design the end of the heat sink opposite to the fan invariably gets hotter than that directly in front of the fan When cool air hits the geometric fins of the IntercoolerTM turbulence is produced thereby enabling efficient cooling Light weight The sw...

Page 10: ...Immunity The equipment should be able to handle three different types of interference Electrostatic discharges up to 8 kV hitting the chassis or cables Transients and bursts up to 1 kV conducted through the cables to the unit Electromagnetic fields up to 3 V m radiated on the unit and the cables in the frequency range of 27 500 MHz We have extended the tests in two cases and chosen a standard used...

Page 11: ...nside of the amplifier These conditions usually occur after prolonged use in environments using cracked oil smoke machines 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 Troubleshooting These are typical things to check if you think your amplifier is fa...

Page 12: ...e 3 LAB GRUPPEN shall not be responsible for any incidental or consequential damages with respect to the products warranted LAB GRUPPEN reserve the right to make changes or improvements in design or manufacturing without assuming any obligation to change or improve products previously manufactured International Please contact your supplier for this information as rights and disclaimers may vary fr...

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