I've compiled some more information from Ben Shinn's old websites. They are a pain to navigate in the web archive browser so I'll post it here.
First, here is Ben Shinn with one of Ardmore, OK's RM-130 DC sirens - August 1998.
The first Storm Master website popped up in 2002, with Ben Shinn acting as a dealer. Ben Shinn touted a number of operations including Shinn Emergency Products, ShinnParts, and The Shinn Group. It's doubtful that any of these concerns drew in much success as none of them are in active business anymore. The siren business was, and always will be, a dog-eat-dog world.
First we are shown the StormMaster I, described as follows:
![Image](http://i1002.photobucket.com/albums/af147/JustInn014/StormMasterI1.png)
StormMaster I from CTI
Covers over 4 square miles.
20hp Rotating Beam
128dbc @100 ft.
ZERO maintenance.
Sealed bearings throughout. Stainless steel grade #8 fasteners. UV Resistant composite materials WILL NOT RUST. Built with the quality you require and expect for years of trouble- free operation.
In 2004, this omni-directional model was introduced. The rounded stator ports bear similarity to contemporary Federal and ASC fare, however it is not a total match. There are no particular specifications for this siren. If one looks carefully you can see the motor housing is a cube shape - an unorthodox choice.
A flyer touts the rotating siren as a 15 horsepower model instead of 20.
The small DC siren is not mentioned anywhere on the site. It seems there was never a formal page dedicated to it. Invariably, it was not a success given its lackluster performance and low quality build.
Ben Shinn also sold spare siren parts for a while. Here's a "blast" from the past:
Things were different 10+ years ago. Every siren spotted was a discovery, good quality recordings and photos were a rarity, very few people owned a Thunderbolt, and viable siren information was hard to come by. Enjoy the StormMasters while they last.