Which has a greater influence on sound quality, the amp or the preamp?

I may be wrong but I have an impression that quite a number of audiophiles use different brands of preamp and power amp. Many also think that it is in fact more difficult to make a great preamp than power amp. Besides, synergy doesn't mean it must be one brand.

 but you would never know how good your speakers would/could sound if you don't give it a chance to be supplied with good input.

+1

Yes, but there is always a point when it is time to upgrade speakers too.

Yes, but there is always a point when it is time to upgrade speakers too.

Yes, I am sure there is.

Yes