Owner's Manual

Page 80/112 SYSTEM ALIGNMENT GUIDELINES

11 SYSTEM ALIGNMENT GUIDELINES

The NX242’s factory delay presets are optimised to provide the best possible crossover between the

GEO S12 and CD18 / S2 / GEO SUB systems. The reference point for this adjustment is the front of

each cabinet. (This means that the internal delays needed to achieve a correct time alignment are set

for cabinets standing next to each other with both fronts aligned). We recommend that the system is

adjusted so that arrivals from GEO S12 and CD18 / S2 / GEO SUB are coincident at a fairly distant

listening position.

11.1 GEO S12 Vertical Cluster design

Cluster design must be done with Geosoft2, which provides very intuitive and fast method to determine

all cluster geometry parameters in relation to venue where cluster is implemented.

IMPORTANT

Geosoft2 is a freeware downloadable on www.nexo-sa.com. Please check our website

periodically for upgrades.

Never install a GEO S12 cluster without checking its acoustical performances and

mechanical safety in Geosoft2 prior to installation.

Please contact your local distributor for assistance and/or training on Geosoft2

11.2 Stacked RS15 / CD18 / S2 / GEO SUB and Flown GEO S12

Recommended NX242 GEOS12 setup family: X-OVER

In the example below, r

being the distance from GEO S12 array to listener position, and r

being the

distance from GEO SUB to listener position, the distance difference is then r

–r

(specified meters or

feet).

• r

> r

, the delay should be set on the CD18 / S2 / GEO SUB NX242 TDcontroller channel.

• r

< r

, the delay should be set on the GEO S12 NX242 TDcontroller channel

• To convert the result in time delay (specified in seconds), apply:

• ∆t = (r

-r

)/C r

and r

in meters, C (sound speed) ≈ 343 m/S.

The delay parameter is set in MENU 1.2 (set the units to meters, feet or seconds according to your

preference). Delay will have to be adjusted according to the distance difference r

–r

(see figure below).