Keystone Helicopter Installs Alto Aviation Audio System
in the Third VIP Sikorsky S-92 Completion

Leominster, MA – January 15, 2007 – Keystone Helicopter Holdings, LLC. a wholly owned subsidiary of Sikorsky recently completed the installation of an Alto Aviation Executive Audio System in the third production VIP S-92. The Executive System consists of four custom mid/high speaker enclosures and two subwoofers. A 240 watt EQ’d amplifier drives the system which weighs just under 13.5 lbs.

The cabin of the S-92 was acoustically mapped by Alto engineers and the amplifier’s EQ was set to produce a sound that rivals even the best home entertainment systems. Proprietary software and acoustic processes developed by Alto enabled the actual “audio footprint” of the S-92 to be recorded. Alto then engineered the EQ board and located proper speaker placement for optimum performance.

“It was an easy installation, and the support from Alto was tremendous”, remarked Daryl Goldsborough, Keystone Engineering.

Keystone Helicopter specializes in full-service engineering, completion and technical support for commercial helicopters, and air medical flight operations. The firm operates a large technical services depot and completion center in Coatesville, Penn., and operates a large fleet of turbine helicopters in numerous locations across several eastern states, primarily in the air medical mission.

Alto Aviation designs and manufactures premium cabin audio systems for corporate aviation fixed wing and rotary wing assets as well as 135 & 121 operators. A complete line of products including audio amplifiers, entertainment loudspeakers, subwoofers, and page/chime speakers are available to provide custom audio system solutions for any aircraft cabin.

For more information contact:
Chris Curley
Director of Sales & Marketing
Alto Aviation
ccurley@altoaviation.com