Refer to this thread
https://www.hifivision.com/threads/quad-dealer-in-bangalore.14636/#post-811543
Quad speakers are hard to beat at the price. s2 will offer better performance/buck. I drove my s2 with naim and marantz pm8003 amp. Dont need too much powerful amp to drive them. Very finicky about placement and very refined tweeter they got. The ribbon tweeter is the highlight of quad z/s series. Its not in your face like typical ribbon tweeter but disperses high frequency sound in a very different presentation than normal tweeter. It gets tine to get used too. These speakers do not have a very exciting sound at first listen like many other speakers, they are on smooth and laid back side, balanced sound, not neutral they have some color to them but are true to tone for instruments such as piano.