- Designed for use in Natatorium (Indoor Swimming Pool) Environments
- 12-Inch Two-Way High-Performance Sealed Enclosure Design
- Fully Rotatable and Interchangeable High-Frequency Horns
- Available in White Finish
- Low Impedance (8 Ohm) High Power Design
- U-Bracket Suspension Supplied
One Systems has developed an application specific set of products designed for use in indoor swimming pool (Natatorium) environments. The 112/NAT is constructed using very high molybdenum content stainless steel for all internal and external structural rigging members.
Indoor swimming pool environments can present very high relative humidity and harsh chemical atmospheres. The combination of humidity and airborne chemical composition restricts the mounting of the 112NAT to wall mounting in solid or block wall (CMU) concrete walls ONLY! One Systems does not allow wire rope suspension or direct mounting to the structural steel of the indoor swimming pool building. One Systems offers recommendations for installation on solid concrete, grout filled block and hollow core block walls. Installation instructions (February 2014 edition) for the 112/NAT and 108/NAT Natatorium Speakers are available on the One Systems website by going to http://www.onesystems.com/technical-papers.php. For specific application information on One Systems Natatorium Loudspeakers, please email firstname.lastname@example.org.
Stainless steels such as 304 and 316 known as austenitic steels, offer good corrosion resistance and strength in typical harsh environments, but will not protect against stress-corrosion cracking (SCC). SCC is a particular problem in indoor pools and can result in structural failure of rigging components. Chlorine based chemicals in the water react with "human" sweat and produce chloramines. These chloramines pass into the atmosphere and are deposited on ALL surfaces in the Natatorium. They move via venue air handling systems. This is problematic above the pool surface that are not routinely washed down or cleaned. Loudspeakers and their rigging are typically mounted above the "splash zone" and these chloramines are left to settle on structural surfaces, whereby SCC can progress to critical levels. There are no visual inspection methods that detect SCC, so careful monitoring will not ensure that structural members are free from this effect.
Fortunately, there are several grades of stainless steels that are extremely resistant to Chloride SCC. Molybdenum 6% super austenitic stainless steels are excellent choices. These grades are recognized by several European countries as being the only acceptable stainless steels for use in Natatorium environments, where they are load bearing, above the "splash" zone and not routinely washed or cleaned. One Systems uses AL-6XN (N08367) material for rigging components, grilles, screws and the included U-Bracket.
The 112/NAT features a 12" woofer and a large format high frequency driver. The 112/NAT is supplied with a high frequency horn that is fully rotatable and interchangeable. The ET-60/40 has a 60 by 40 degree pattern and is pre-mounted at the factory. The 112/NAT can also be fitted with the ET-105/60 horn that features a 105 degree by 60 degree pattern (the ET-105/60 horn may be ordered from One Systems at no additional charge). The procedure for changing the high frequency horns may be found on the One Systems web site in the documentation section under the "tech papers and install guides" tab (One Systems Interchangeable High Frequency Horns For 112IM, 115TW and 115RW loudspeakers). This same procedure should be followed for the 112/NAT.
The 112/NAT is a high performance system designed for use in indoor swimming pool environments. The design features peak power handling of 3200 watts and is available in an 8-ohm only. There are two mounting points (AL-6XN stainless steel) and the 112/NAT may be suspended using the supplied "U" bracket only. The 112/NAT is supplied with an external weather cover and IP68 gland nut for simple wiring. The input is via a barrier strip. The 112/NAT is a closed box design. This acoustic configuration allows for simple low frequency equalization using mixer strip EQ or other shelving style filters.
60Hz – 16kHz
60ºH x 40ºV (ETS60/40)
Available 105ºH x 60ºV (ETS105/60)
Passive Crossover Frequency:
Barrier Strip (Full Range Only)
System Sensitivity: (1watt-1meter)
800 watts Continuous
1600 watts Program
3200 watts Peak*
ONE SYSTEMS 12I/O-1
ONE SYSTEMS ET-1 Compression Driver
2 Each U-Bracket Mount Only
Dimensions (H x W x D):
749mm x 368mm x 414mm
(29.5 in x 14.5 in x 16.3in)
36 KG (79.2 LB)
No optional accessories allowed