Nexo GEO SUB User manual

GEO SUB Advantages
nAdvanced Cardioid Bass and SubBass module
nOptimized Front-to-Rear Phase Adjustment and
Maximized LF and SubBass Efficiency
nAerodynamic Profiled Vents with 20dB Vent Noise
Reduction and improved Linearity at high SPL
nX-Over Mode from 75Hz to 150Hz when GEO
SUBs are stacked. Overlap Mode up to 600Hz when
GEO SUBs are flown with any GEO system
nArrays with GEO D10 or flies independently as
part of GEO S and GEO T Systems
nEtherSound™ (Network) Controllable
nBottom-Line Engineering for Theatre to Arena-
Sized Fixed & Mobile Applications
The unconventional GEO SUB displays exceptional forward
gain across three octaves eliminating many problems
common to omni-directional LF. A high-efficiency, front-
loaded 18” driver delivers 140-143dB Peak SPL, while twin
12” side-firing transducers help create cardioid LF pattern
control via precise rear pattern cancellation.
NX242 TDcontrollers, fitted with the required NXtension
Expander Boards,employ advanced digital filter sets with
new, proprietary algorithms, to optimize phase and extend
GEO SUB’s cardioid LF control from midbass to subbass.
The Over/Under GEOD-BUMPER allows as many as 16x
GEO SUBs to be flown together and presents multiple
stage-stackable options.
GEOSUB
www.nexo.fr
Data sheet
20 50 100
-180
-60
-0
60
180 GEO SUB HORIZONTAL COVERAGE
GEO SUB Off-Axis Response
-120
120
200 500 1K
20 50 100
10
20
50
GEO SUB IMPEDANCE (Ohm)
----- FC: Geo SUB front impedance ----- FC: Geo SUB rear Impedance
5
100
200 500 1K
20 50 100
-10
0
5
GEO SUB ON-AXIS RESPONSE
----- F: Geo SUB Crossover, 1/3oct log smoothing, values scaled
----- F: Geo SUB Overlap, 1/3oct log smoothing, values scaled
-5
10
200 500 1K
-15
-20
-25
-30

LIMITED WARRANTY
NEXO loudspeakers and electronics are covered against defects in workmanship or materials for a period of two (2) years from the original date
of purchase. At the option of NEXO the defective item will be repaired/replaced with no charge for materials/labour. The item is to be adequately
packaged and dispatched, pre-paid, to a NEXO authorised distributor/service centre. Unauthorised repair shall void the warranty. The NEXO
warranty does not cover cosmetics or finish and does not apply to any items which in NEXO’s opinion have failed due to used abuse, accidents,
modifications or any type of misuse.All images and text herein are the property of NEXO SA, and deemed accurate, although specifications are
subject to change without notice.
NEXO is one of the world’s
leading sound reinforcement
loudspeaker manufacturers.
Founded in 1979, the company
is dedicated to crafting practical
solutions with solid engineering.
Each new design begins with
a proprietary sophisticated
computer simulation process
that allows every parameter
to be extensively modeled
and simulated, leading
to breakthrough cost and
performance gains.
NEXO’s comprehensive product
line includes loudspeakers,
analogue and digital control
electronics and amplification; all
designed to deliver consistent
sound quality and long term
reliability for a broad range of
applications.
NEXO S.A.
Parc d’Activité
du Pré de la Dame Jeanne
B.P. 5
60128 PLAILLY
Tel: [phone]
Fax: [phone]
e-mail: [email protected]
NEXO LatAM
C.C. No 33. Suc 49
Caballito (1449)
Buenos Aires
Argentina
Tel: [phone]
Fax: [phone]
e-mail: [email protected]
NEXO Asia
GPO Box 806
Hong Kong
SAR China
Tel: [phone]
Fax: [phone]
e-mail: [email protected]
Specifications
GEO SUB PRODUCT FEATURES
Components 1x 18” (46cm) long excursion neodymium 8Ωdriver
2x 12” (30cm) neodymium 16Ωdrivers
Height x Width x Depth 552.5 x 744 x 1131mm (21 1/4” x 29 1/3” x 44 1/2”)
Shape 10° Trapezoid
Weight 86Kg (189.6lbs)
Connectors 2 x NL4MP SPEAKON 4 pole (In & Through).
Construction Baltic Birch ply finish with structured black coating.
Front Finish Moulded Black Metal Grill.
Flying Points Integral flying system. Intercabinet angle adjustments = 0.2°, 0.315°, 0.5°, 0.8°;
1.25°, 2.0°, 3.15°, 5, 6.3°, 8.0°, 10° (logarithmic steps).
SYSTEM SPECIFICATIONS GEO SUB with NX242 TDcontroller
Frequency response @-3dB [a] 38Hz – 300Hz
Usable range @-6dB [a] 35Hz – 500Hz
Sensitivity 1W @ 1m [b] 103dB SPL Nominal
Peak SPL @ 1m [b] 140-143dB Peak
Dispersion [c] Cardioid pattern over the entire useable bandwidth
(two channels of the NX242 are used for the process).
Directivity Index [c] Q = 4.3 & DI = 5.3dB over the entire useable bandwidth.
Crossover frequency X-Over Mode = 75Hz active / Overlap Mode = 300Hz through NX242 Digital TDcontroller.
Nominal impedance 2 x 8Ω.
Recommended amplifiers 2 amplifier channels are required for directional operation, each rated at 1000 to
2000Watts into 8Ωper channel.
SYSTEM OPERATION
Electronic Controller The NX242 Digital TDcontroller presets are precisely matched to the GEO SUB and include
sophisticated protection systems. Using the GEO SUB without a properly connected
NX242 Digital TDcontroller will result in poor sound quality and can damage components.
Speaker Cables The front loudspeaker of the GEO SUB is wired 2+ & 2- while the rear loudspeakers
are wired in parallel 1- & 1+. The GEO SUB must use separate cables from the main system.
Rigging System Please refer to the user manual before any operation.
As part of a policy of continual improvement, NEXO reserves the right to change specifications without notice.
[a] Response curves and data: anechoic far field above 400Hz, half-space anechoic below 400Hz.
Usable range data: frequency response capability with TD crossover slopes removed.
[b] Sensitivity & peak SPL: will depend on spectral distribution. Measured with band limited pink noise.
Refers to the specified +/- 3dB range. Data are for speaker + processor + recommended amplifier combinations.
[c] Directivity curves and data: 1/3 octave smoothed frequency response, normalized to on-axis response.
Data obtained by computer processing of off-axis response curves.
[d] Please refer to the user manual.
[29 1/2"]
744 mm
[44 1/2"]
1131 mm
10∞
[20 1/2"]
515 mm
[29 1/2"]
744 mm
[44 1/2"]
1131 mm
10∞
[20 1/2"]
515 mm
[29 1/2"]
744 mm
[44 1/2"]
1131 mm
10∞
[20 1/2"]
515 mm
[29 1/2"]
744 mm
[44 1/2"]
1131 mm
10∞
[20 1/2"]
515 mm