KEF LS3/5A

Pre owned. In good condition. Shows some signs of wear, not clearly visible in the photos. Supplied without the original packaging.

The model belongs to the LS3/5A family, the compact monitor originally developed by the BBC for use in mobile studios and subsequently produced by several manufacturers. The version made by KEF is part of the Reference series and closely follows the original design, retaining its dimensions, proportions and acoustic configuration.

The cabinet retains the characteristic compact rectangular shape, with simple lines and a front grille covering the two drivers. The woofer is mounted on an internal panel positioned slightly behind the front baffle, while the tweeter is surrounded by the traditional black felt element. The construction therefore maintains the typical LS3/5A architecture, with particular attention to manufacturing precision.

The rear panel features a large gold-finished plate covering a significant portion of the surface and incorporating two pairs of gold-plated binding posts for speaker connection. The finish and construction details retain the understated character of the series while adding distinctive elements of KEF production.

For this version, KEF focuses particularly on manufacturing precision, applying the specifications originally defined by the BBC for the LS3/5A project with especially tight tolerances. The aim is to further reduce variations between individual units and maintain consistent performance between the two speakers in the pair.

The acoustic approach remains characteristic of the LS3/5A design, with reproduction focused on stereo image coherence, vocal definition and tonal continuity. The presentation provides a wide and well-focused soundstage, with good separation between individual elements and full, articulated vocal reproduction. The piano retains good harmonic richness and transient speed, while percussion is detailed and well defined.

The low-frequency range prioritizes control and intelligibility over absolute extension, making the speaker suitable for use in relatively small rooms. Positioning benefits from some distance from the rear wall, while the distance from the side walls is less critical. The use of dedicated stands allows the speakers to be positioned correctly and helps optimize their performance through the lower and upper midrange.

Technical specifications:

• Type: passive loudspeaker
• Configuration: 2-way
• Tweeter: T27 (SP1032)
• Woofer: B110 mid/bass (SP1228)
• Sensitivity: 82.5 dB
• Nominal impedance: 11 Ω
• Frequency response: 70 Hz - 20 kHz ±3 dB
• Maximum power handling: 75 W
• Dimensions: 190 × 300 × 170 mm
• Weight: 5.5 kg