Quad Classic S-4
Quad has always prided itself as providing the complete solution to music lovers. Each Quad component marries perfectly to other parts of the hi-fi system and is designed with one target – to be ‘The Closest Approach To The Original Sound’.
Quad S Series loudspeakers fulfill that objective admirably. Sporting a new ribbon treble unit aligned, through sophisticated crossover networks, to Quad’s advanced bass-midrange drivers, each and every loudspeaker in the range delivers all the nuances and passion of the original performance. All S Series models sport a bespoke ribbon treble unit, delivering effortlessly extended high frequencies that are audibly superior to those supplied by typical dome tweeters.
While many ribbon drivers are delicate, easily prone to burning out if overpowered, the new ribbon unit developed for the S Series is a thoroughly modern affair, utilising the latest techniques and materials. The ribbon itself is a sandwich construction, making it robust enough to handle high-powered amplifiers, and is fully immersed in a powerful magnetic field so that it accomplishes its dual role of being both the voice coil and sound radiator.
As well as delivering excellent transient response and superb musical detail, the sound from this ribbon unit is smooth right up to the highest musical overtones beyond the limits of human hearing. Controlled directivity maintains this sound quality over a wide horizontal arc to cover all listeners whilst vertical dispersion is tailored to avoid floor and ceiling reflections, resulting in the purest high frequency performance at the listening seat.
General description 3-way floorstanding speaker
Enclosure type ABR
Transducer complement 3-way
Bass driver 125mm Woven Carbon fibre Cone
Midrange driver 100mm Woven Carbon Fibre Cone
AV shield No
Treble Driver 12 x 45 mm True Ribbon
Sensitivity (2.83V @ 1m) 88dB
Recommended amplifier power 25-100W
Peak SPL 100dB
Nominal impedance 6Ω
Minimum impedance 3.5Ω
Frequency response (+/-3dB) 44Hz ~ 23kHz
Bass extension (-6dB) 37Hz
Crossover frequency 520Hz & 3.9kHz
Cabinet Volume (in litres) 47.0L
Dimensions (H x W x D) (870 + 55) x 180 x (300+30)mm