Danley serves hard time at Alcatraz
Thursday, 20 September 2018
alcatrazislandSan Francisco’s Alcatraz Island attracts over 2,000 visitors every day
USA - First a lighthouse, then a military base, then a military prison, then a federal prison, and finally a National Park Service historic site, San Francisco’s Alcatraz Island attracts over 2,000 visitors every day. Although it only served as a federal prison for 29 years (1934 to 1963), Alcatraz lives on in the cultural conscious as the most notorious and inescapable prison ever – the subject of books, TV shows, and movies.
True to its reputation, the government sent all of its worst criminals there, including Al Capone and George ‘Machine Gun’ Kelly, and, despite numerous attempts, no one is believed to have survived an escape from Alcatraz. Recently, local AV integrator San Francisco Audio designed and installed a sound system for the nine most important locations on Alcatraz using fully-weatherized Danley GO2 8CX loudspeakers.
“There is a huge volume of visitors to Alcatraz, and the National Park Service guides give tours explaining the island’s features and history,” explained Radley Hirsch, owner of San Francisco Audio. “We needed a solid outdoor loudspeaker for the places where the docents stop, and the Danley GO2 8CXs sound well-balanced and are constructed to last. Moreover, Danley builds them in the USA, unlike most other manufacturers.”
Each station on the tour has a Lectrosonics wireless microphone system with an ear-worn microphone, a Surge-X power conditioner to tame Alcatraz’s off-the-grid solar panel system, and a small 120-watt mono JBL CSA1120Z amplifier. The JBL amp takes a balanced, line level input and outputs to 8 Ohms with a sleep circuit to minimize power usage. “I found that the best way to attach each Danley GO2 8CX to its pole was with a stainless-steel U-bolt,” Hirsch said. “The U-bolts we used are good quality (not from Home Depot!), USA made, and heavy duty.”
He continued, “The system sounds lovely, and the rangers love it. There’s no EQ except a bass roll-off from the Lectrosonics transmitters, and the amp to loudspeaker run is pretty short with good 12-gauge West Penn Wire. Although the Danley GO2 8CXs can handle a lot of power and deliver a lot of volume, we’re deliberately keeping them quiet: just enough to cover a group of 20 to two-hundred people for spoken word and not so much as to bleed into other areas of the island.”
(Jim Evans)

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