1 geo d10 recommended amplification, 2 geo sub recommended amplification, 3 current rating – Nexo GEO D User Manual

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GEO

ENERAL

NSTRUCTIONS

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2.2.1 GEO D10 recommended amplification

GEO D10 is rated for very high power handling and has a 16 Ohms nominal impedance per channel
(Passive 2 ways or Active 3 ways).

These high impedance values allow connection of 3 to 6 cabinets in parallel for each amplifier channel.

Nexo recommends amplifiers in agreement with table below:

Recommended
Amplifier#

Channel 1

LF Rear

Channel 2

LF/MF Front + HF in Passive Mode

Channel 3

HF in Active Mode

GEO D10 Passive Mode
3 in parallel (5.3 Ohms load)

1750 to 3100 W / 4 Ohms

GEO D10 Active Mode
3 in parallel (5.3 Ohms load)

1750 to 3100 W / 4 Ohms

875to 1550 W / 4 Ohms

GEO D10 Passive Mode
4 in parallel (4 Ohms load)

2000 to 3600 W / 4 Ohms

2000 W to 3600 W / 4 Ohms

GEO D10 Active Mode
4 in parallel (4 Ohms load)

2000 to 3600 W / 4 Ohms

1000 to 1800 W / 4 Ohms

GEO D10 Passive Mode
6 in parallel (2.7 Ohms load)

3300 to 6000 W / 2 Ohms

GEO D10 Active Mode
6 in parallel (2.7 Ohms load)

3300 to 6000 W / 2 Ohms

1650 to 3000 W / 2 Ohms

2.2.2 GEO SUB recommended amplification

The GEO SUB requires two amplifier channels delivering separately processed signals to produce its
directional pattern.

Recommended
Amplifier#

Channel 1

VLF Rear

Channel 2

VLF-LF Front

GEO SUB
Single (8 Ohms load)

1000 to 2000 W / 8 Ohms

GEO SUB
2 in parallel (4 Ohms load)

2000 to 4000 W / 4 Ohms

2.2.3 Current

rating

It is very important that the amplifier behaves correctly under low load conditions. A speaker system is
reactive by nature: on transient signals like music it will require four to ten times more instantaneous
current than its nominal impedance would indicate. Amplifiers are generally specified by continuous
RMS power into resistive loads, however the only useful information about current capacity is the
specification into a 2 Ohm load. It is possible to perform an amplifier listening test by loading the amps
with twice the number of cabinets considered for the application (2 speakers per channel instead of one,
4 instead of 2) and running the amps up to the onset of clipping. If the signal does not noticeably
deteriorate, the amplifier is well adapted (overheating after approximately ten minutes is normal but
thermal protection must not operate too quickly after starting this test).