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G-Series User Manual v1.0 

Cabling and Amplifier Selection 
 
G-Series products are designed to be used with professional power amplifiers providing the following power outputs: 
 
G6  

250W/channel 

into eight ohms 

G8  

400W/channel 

into eight ohms 

G12  

500W/channel 

into eight ohms 

G15  

1100W/channel 

into eight ohms 

G212B    

1600W/channel 

into four ohms 

G218B  

2000W/channel 

into four ohms 

 
It is good practice to use an amplifier equal to the program power rating of the loudspeaker – so as to retain sufficient 
headroom and good dynamic range.  Care should be taken during operation to avoid amplifier clipping – as this can cause 
serious damage to your loudspeakers.  If in doubt, please contact your dealer who will be happy to assist you in correct 
amplifier choice and setup. 
 
Cabling 
All G-Series products are supplied with Neutrik Speakon

TM

 NL4 connectors, wired pin 1+/1-.  It is recommended that the 

resistance of your cable is less than one tenth of the nominal system impedance.  Given below are the recommended 
maximum cable lengths for different cross-sections and impedances. 

Conductor Cross Sectional Area 

 

 

Maximum Recommended Cable Length 

 

 

 

 

 

 

4 ohms   

8 ohms   

16 ohms 

1.0mm

2

 

    11m 

  22m 

  44m 

1.5mm

    17m 

  34m 

  68m 

2.0mm

2

 

    22m 

  44m 

  88m 

2.5mm

2

 

    29m 

  58m 

  116m 

4.0mm

2

 

    44m 

  88m 

  176m 

6.0mm

2

 

    66m 

  132m 

  264m 

 
 
 
 
 
 
 
 
 
 
 

A small power amplifier working too hard is more likely to damage a loudspeaker than a large 

power amplifier working within its operating range! 

Summary of Contents for G12

Page 1: ...obal 9 G Series PA Installation Loudspeakers User Manual v1 0 G6 fullrange enclosure G8 fullrange enclosure G12 fullrange enclosure G15 fullrange enclosure G212B subwoofer G218B subwoofer www global 9 com Copyright Global 9 Ltd 2006 ...

Page 2: ...loudspeaker 5 G15 passive two way fullrange loudspeaker 5 G212B active passive subwoofer 6 G218B subwoofer 7 System Set up Safety Considerations 8 Cabling Amplifier selection 9 Mounting Rigging Options Rigging Hardware Accessories 10 Permanent Installations 10 Maintenance G6 Drive Unit Service 11 G8 Drive Unit Service 11 G12 Drive Unit Service 12 G15 Drive Unit Service 12 G212B Drive Unit Service ...

Page 3: ...ting your local Global 9 dealer or email info global 9 com for further assistance Unpacking Every G Series product is built to the highest standard and thoroughly tested before it leaves the factory After unpacking your loudspeaker please inspect it carefully for any signs of transit damage If such damage is found please notify the carrier at once to instigate a claim It is suggested that you reta...

Page 4: ...ed in a wide variety of applications from compact floor monitoring to multi zoning in permanent installations G8 Loudspeaker The G8 is a compact fullrange loudspeaker Contained within the sturdy Birch plywood enclosure is a powerful 8 LF driver and a 1 HF compression driver on a rotatable 70 x 50 horn As with all G Series fullrange enclosures a G Phase passive crossover network maintains flat freq...

Page 5: ... a wide variety of possible applications G15 Loudspeaker The G15 is a the largest fullrange loudspeaker in the G Series It is intended for large scale live sound reinforcement high power stage monitoring or larger installations The sturdy Birch plywood enclosure houses a neodymium 15 LF driver with a 2 exit HF compression driver on a 60 H x 40 V horn Controlled dispersion throughout the operating ...

Page 6: ...e through a single exit For ease of use in mobile applications an internal passive crossover is fitted to allow a single amplifier channel to drive both the G212B and a suitable mid high enclosure Alternatively using the switch on the rear of the enclosure the G212B can be changed from passive to active mode where an active crossover can be used instead for more demanding applications For ease of ...

Page 7: ... the enclosure size is kept to a minimum whilst still producing the required low frequency performance It features a pair of high power 18 LF drive units each in their own vented chamber Both drive units then fire through a single exit An active crossover is required for the G218B to function correctly For ease of transportation in portable applications the G212B is supplied and recessed handles a...

Page 8: ... the speaker being pulled over Loose cables should be covered or taped down wherever possible to reduce trip hazards If stands are being used outdoors it may be necessary to add ballast to the base of the stand to prevent it toppling over When using poles on top of subwoofer systems please observe similar precautions Ground Stacking Ensure that the floor or stage surface can withstand the weight o...

Page 9: ... can cause serious damage to your loudspeakers If in doubt please contact your dealer who will be happy to assist you in correct amplifier choice and setup Cabling All G Series products are supplied with Neutrik SpeakonTM NL4 connectors wired pin 1 1 It is recommended that the resistance of your cable is less than one tenth of the nominal system impedance Given below are the recommended maximum ca...

Page 10: ...nder no circumstances should the mounting points of one enclosure be used to suspend another enclosure below it Global 9 are in no way responsible for the failure of incorrectly rigged systems This information relates specifically to the rigging techniques for the G Series fullrange enclosures only If you are in any doubt about safe practices for rigging loudspeakers please contact your local Glob...

Page 11: ...llen key and using a flat blade screwdriver carefully ease the grille out of location Take care not to damage the LF driver 2 Using a 4mm Allen key remove the four M5 socket head bolts holding the HF waveguide in place Lift the HF assembly out of the enclosure and carefully disconnect the cables observing correct polarity for future reference The drive unit can be removed using an 8mm spanner to r...

Page 12: ...terminal black to negative and reposition the driver Reinstate the eight bolts and retighten 4 Replace the grille be easing into place and reinstating the six countersunk bolts G15 High Frequency Drive Unit 1 Remove the eight countersunk bolts with an Allen key and using a flat blade screwdriver carefully ease the grille out of location Take care not to damage the LF driver 2 Using a 4mm Allen key...

Page 13: ...emove the six countersunk bolts securing the grille in place Using a flat blade screwdriver carefully ease the grille out of its location 2 Using an Allen key undo the eight socket head bolts holding the lower drive unit in place Remove these bolts and ensure that you have both shake proof and flat washers 3 Lift the drive unit out of the mounting hole ensuring that you do not hit the drive unit a...

Page 14: ...s been removed altered or defaced Returning your Global 9 loudspeaker Should your G Series loudspeaker develop a fault please return it freight prepaid in its original packaging along with proof of purchase to your local dealer including a description of the suspected fault Serial numbers must be quoted in all correspondence relating to the claim Global 9 or its representatives are in no way liabl...

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