Page 46/63 TECHNICAL SPECIFICATIONS
6 TECHNICAL SPECIFICATIONS
6.1 GEO T4805 Vertical Tangent Array Module
6.1.1 System specifications
PRODUCT FEATURES GEO T4805
Components HF: 1 x 3” voice coil, 1.4” throat neodymium 16 Ohm driver on an hyperboloid reflective wavesource.
MF/LF (front-firing): 2 x 8” (20cm) long excursion neodymium hi-flux 16 Ohm drivers in series.
LF (rear-firing): 2 x 8” (20cm) long excursion neodymium hi-flux 16 Ohm drivers in series.
Height x Width x Depth 286 x 903 x 627 mm (11 1/4” x 35 1/2” x 24 5/8”) including array assembly system
Shape 5° Trapezoid.
Weight: net 52 kg (114.6 lbs) including array assembly system.
Connectors 1 x AMPHENOL EP6 6 pole socket In; 1 x AMPHENOL AP6 6 pole connector Through.
Construction Main structure: Baltic birch ply with structured black coating. Rear section: Aluminum with dark grey coating.
Front finish Injected polyurethane flange, metallic gray coating (structured black on request).
Flying points Integral flying system.
Intercabinet angle adjustments = 0.125°, 0.2°, 0.315°, 0.5°, 0.8°; 1.25°, 2.0°, 3.15°, 5° (logarithmic steps)
SYSTEM SPECIFICATIONS GEO T4805 with NX242 TDcontroller
Frequency response [a] 67 Hz – 19 kHz ± 3 dB
Usable range @-6dB [a] 60 Hz – 20 kHz
Sensitivity 1W @ 1m [b] 109 dB SPL nominal (107 dB SPL wideband)
Peak SPL @ 1m [b] Configuration dependent [d].
Dispersion [c] Vertical plane: Configuration dependent [d].
Horizontal plane: 90°.
Low Frequency: cardioid
Crossover frequencies LF-MF: 250 Hz active; MF-HF: 1.3 kHz active
Nominal impedance HF: 16 Ohm; LF/MF front: 32 Ohm; LF rear: 32 Ohm
Recommended amplifiers HF: 2700 Watts into ~3 Ohm (6 cabinets parallel per amp channel).
MF/LF front: 5200 Watts into ~6 Ohm (6 cabinets parallel per bridged mono amp).
LF rear section: 5200 Watts into ~6 Ohm (6 cabinets parallel per bridged mono amp).
SYSTEM OPERATION
Electronic controller The NX242 Digital TDcontroller presets are precisely matched to the GEO T Series cabinets and include sophisticated
protection systems as well as advanced cardioid directivity DSP algorithms. Using GEO T Series cabinets without a
properly connected NX242 will result in poor sound quality and can damage components.
Array design Arrays of less than 6 x GEO T4805 will provide poor dispersion control and are neither recommended nor supported.
Sub-bass CD18 directional sub extends system low frequency response down to 25 Hz
Speaker cables HF: wired 5(-) / 6(+).
MF/LF front section: wired 3(-) / 4(+).
LF rear section: wired 1(-) / 2(+).
Rigging System Please refer to the GEO 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 200 Hz, half-space anechoic below 200 Hz.
[b] Sensitivity & peak SPL: will depend on spectral distribution. Measured with band limited pink noise.
Refers to the specified +/- 3 dB 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 GEO T user Manual.
Usable range data: frequency response capability with TD crossover slopes removed.
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