Audiomaster21 LS3/5A

LS3/5A loudspeaker design was created by the Engineering Department of the BBC. The design brief was to develop a small, broadcast quality monitor loudspeaker. The loudspeaker had to be capable of accurately reproducing the human voice, in outside broadcast applications, yet take up the minimum amount of space.

However, to suit the BBC’s need of minimum downtime, the speaker had to be manufactured to a very tight specification, so that in the event of field failure, the entire speaker could be replaced by another, without affecting the perceived tonal balance.

Almost 5 decades later, these loudspeakers are a superb example of globally enjoyed HiFi, in a historic tradition of innovation and timelessness, which we hope will give much enjoyment. Please read through this manual.

It contains much useful information to enable you to get your speakers installed correctly. Provided the recommendations are followed your LS3/5a’s will give you many years of pleasure.

Specifications:

System Type: Two way infinite baffle ( closed box)
Frequency Response: 70Hz – 20KHz +/- 3dB
Bass/Midrange Driver: 133mm polymer cone
Tweeter: 19mm mylar dome
Crossover Frequency: 3KHz , AudioMaster21 FL6/23 type
Sensitivity: 83dB for 2.83V at 1M
Nominal Impedance: 15 Ohms
Recommended Amplifier Range: 30-80 Watts
(warning do not connect to any amplifier exceeding range as damage may result ) Cabinet: Cabinet 9-12mm Birch ply critically damped
Grille: Black Acoustic Textile
Dimensions (H x W x D): 304 x 190 x 165 mm.
Weight 5.5 Kgs each