Rogers BBC LS3/5a

Dates

General

• Manufacturer: Rogers
• Model: LS3/5a
• Years of manufacture: 1975 to about 1989;
• Manufactured in: England;
• Colour: N/A
• Dimensions (WxHxD): 188 x 300 x 156 mm (7.5 x 12 x 6.25 in.)
• Weight: 11.7 lbs (5.3 kg)
• Original Price Approx: $1,695

Connections

• Two-pole terminal screws

Technical data

• Volume: 5 litres
• Housing: pressure chamber
• Driver: two-way (see notes for details)
  • 25 mm Mylar-dome tweeter;
  • 110 mm Bextrene-cone woofer
• Recommended amplifier power: 50 watts
• Sensitivity SPL: 82 dB/1W/1m
• Frequency response: 80 - 20,000 Hz
• Crossover frequency: 3,000 Hz
• Impedance: 10 Ohm
• Other: Stand mounting

Notes

• The same license built in the 80s also Spendor and Harbeth, see Spendor LS3/5(A), Harbeth LS3/5A.
• For the chassis, the BBC resorted to KEF: http://www.kef.com/html/de/explore/about_kef/kef/index.html , this page references BBC reports.
  
• and LS3/5A at English wikipedia.
• Mylar is a "state-of-the-art thin yet strong polyester film" (source: www.kef.com/html/de/explore/about_kef/raymond_cooke/index.html , retrieved 4 October 2015).
• Bextrene is the commercial name for [HIPS, a copolymer]

Note

By 1988, Rogers had manufactured approximately 43,000 LS3/5.

Report

• stereophile.com from February 1989 (English), retrieved March 7, 2020.
• pictures of the prototype and Rogers listing 1974, retrieved March 21, 2020.