United Kingdom

SRS-A27
http://www.sony.co.uk Sony's most affordable active speaker system - powered by batteries or optional AC adaptor
This document was created on

27-May-2009

Features
Please be aware that the features/specifications can differ from country to country. Total output 2 W Volume control for convenient operation Compact desktop speakers 2-way power supply: batteries or optional AC power adaptor Silver colour matches well with portable audio systems

Technical specifications

General Data Passive type Active type Output power (W) Full range Bass reflex system Speaker unit (mm) Magnet NO YES 2.0 YES 57.0 Neodymium

Useful Links

Product support http://www.sony.co.uk
Speaker impedance (Ohm) Frequency (Hz) Volume control Mega Bass ON/OFF power Headphone jack Dual input Cord length (m) Plug Magnetically shielded Number of batteries Battery life (h) Weight left (g) Weight right (g) AC power
6.- 16,000 YES NO YES NO NO 1.0 L-shaped stereo mini plug with OFC cord YES 4.0 30.0 270.0 210.0 NO
Dimensions Width (mm) Height (mm) Depth (mm) 84.0 128.0 88.0
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OSMP West TSA Inventory Report: Summary for Accipiter Surveys in West TSA Background and Justification The Northern Goshawk is considered a sensitive species by the US Forest Service and vulnerable (S3B) by the Colorado Natural Heritage Program. OSMP identified this species as a nested target and indicator species in the West TSA Plan. Thus, it is important for OSMP to locate potential breeding areas for recreational management plans such as Trails Study Areas. While some Coopers Hawks and Sharp-shinned Hawks have shown an ability to adapt to human use, actions should be taken to route human use away from known nesting sites. Accipiter surveys have not been conducted in the mountain backdrop since 1989. Therefore, current information on the presence and distribution of these species is required.
Methods The accipiter survey methodology was adapted from:
1.) Woodbridge, B.; Hargis, C.D. 2006. Northern goshawk inventory and monitoring technical guide. Gen. Tech. Rep. WO-71. Washington, DC: U.S. Department of Agriculture, Forest Service. 80 p. 2.) Kennedy, P.L.; Stahlecker, D.W. 1993. Responsiveness of nesting northern goshawks to taped broadcasts of 3 conspecific calls. Journal of Wildlife Management. 57: 249257.
Call stations were located 200 m apart along each transect and simultaneous surveys were conducted no closer than two transect widths apart to avoid identifying broadcasts of coworkers. To elicit an accipiter response, staff broadcasted the Northern Goshawk juvenile begging call as well as the adult wail call using Sony SRS-A27 amplified speakers set to broadcast 110 dB at 1 meter distance. Staff did not survey under conditions such as high winds (greater than 15 mph) or rain that reduced ability to detect accipiter responses. Surveys began half an hour before sunrise and ceased half an hour before sunset. When staff detected an accipiter, they attempted to locate the accipiter visually and determine the species and age (adult versus juvenile) of the responding individual. Staff also recorded compass bearing of any individual leaving the station to aid in locating potential nests. Results and Discussion OSMP staff surveyed 6 drainages at least once from 25 July to 5 August. Staff surveyed Gregory Canyon, Flagstaff, and Panther Canyon twice and Lost Gulch, North Draw, and Aspen Canyon once. The latter areas were only surveyed once because ERO performed the other survey. OSMP staff (as well as ERO) conducted accipiter surveys during late July and early August. This surveying timeframe was chosen to improve detectability of successful
accipiter breeding attempts (juveniles and fledglings will often respond to broadcasts if present in the area). Staff detected two adult and two juvenile Coopers Hawks and one juvenile Northern Goshawk during broadcast surveys in 2008. In Lost Gulch, staff located two Coopers Hawk nests where successful breeding had taken place. In Aspen Canyon, staff observed two Coopers Hawk fledglings close to a nesting site, although the use of this nest could not be confirmed. The juvenile Northern Goshawk responded to broadcasts at two stations in the Flagstaff study area on 27 July, but this individual was not detected during a subsequent survey. Thus, this individual may not have been breeding but rather simply moving through the area. While surveys conducted during late summer can detect successful accipiter nesting attempts, they do not provide any information on non-successful breeders. To learn more about the site choice and distribution of these individuals, dawn acoustical surveys (conducted in spring) are recommended. Increasing the number of dawn acoustical surveys may provide a more complete view of accipiter use of OSMP forests as well as identify some of the causes of nesting failures. Because it was evident that most of the successful breeding areas were located in areas with low human use, locating nesting attempts may help OSMP to manage for these species more effectively.