GRAHAM AUDIO LS5/8

Pair of Floor-Standing Speakers

This flagship BBC model was developed to handle higher sound pressure levels with ease, delivering greater transparency and coherence. It was the first BBC speaker to use a polypropylene cone, which, being lighter than Bextrene, provided higher efficiency and reduced coloration. A carefully designed cone profile allows the driver to perform flawlessly in the midrange.

Designed in collaboration with Derek Hughes and Volt Loudspeakers and produced under BBC license, it features an exclusive 12-inch bass/midrange unit paired with the same 34mm Audax tweeter used in the BBC LS5/9 model.

As with all BBC monitors, the cabinet is finely tuned and constructed from high-quality birch plywood with rigid corner reinforcements. The 12mm panels are optimized to shift resonances away from the midrange, while an internal layer of rock wool is used for damping, offering better performance than the cheaper materials commonly employed.

The overall design retains the same clarity and midrange balance as the BBC LS5/9 but delivers a more extended bass response and enhanced treble performance in larger listening environments. The BBC LS5/8 model was originally conceived as an active design, but Derek Hughes has developed a passive crossover that significantly improves resolution and imaging compared to the original design while still adhering to the BBC's stringent specifications.

Technical specifications:

• System: 2-way Reflex
• Cabinet: Thin-wall construction (critically damped) in birch plywood
• Finish: Cherry
• Dimensions: 76 cm (Height) x 46 cm (Width) x 40 cm (Depth)
• Weight: 34 kg
• Frequency Response: 40 Hz ~ 16 kHz +/-3 dB
• Nominal Impedance: 8 Ohms
• Sensitivity: 89 dB SPL (2.83 V, 1 m)
• Maximum Output: > 110 dB per pair @ 2 m
• Bass/Midrange: 300 mm Diaphnatone polypropylene
• Tweeter: Son Audax HD 13D34H
• Crossover: 1.8 kHz, 19 precision elements
• Recommended Amplification: 50 to 250 watts