Quad Classic S-4

Planet Audio
Planet Audio

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

ABR 125mmx2

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

Weight 16.4kg