Can I be specific? I'm considering the Topping TP22 which supposedly have high quality components. On the other hand I'm looking at used entry level Marantzs in the ads.
1. I read somewhere that entry level amps don't have high quality components. Does it mean that on paper, the TP22 will have better sound quality?
2. By next year I plan to upgrade the speakers (will initially use 8 ohm speakers from an old Pioneer mini component) and is looking at Polk RTi A1 which has a rating of 20-125W but as per your explanation this will push the amp beyond its limit. I don't see the same problem with the Marantz.
It appears that if I want to get the TP22 I have to find speakers that have lower nominal wattage but have high sensitivity. Most of the speakers I see in the ads, however, have specs similar to the A1.
If you are looking for dynamics...go for a Solid State Amp. But if you don't have a big budget and you want to hear quality music depth, details, soundstage go for Tripath Amp particularly TP22, and others like TP10 and SMSL SA 36A. Good quality parts is a good reference for good sound quality, but not as good as having a good clean and stable power supply in the amp. There are lots of good quality parts of amplifiers there, but they sound thin.
Regarding the speakers, yes it's proper to choose low wattage high sensitivity speakers like 94db up. Unless, you have a small room and listen to music moderately, this will not be an issue.
I tested a Klipsch RF 7 (high wattage, high 97db up sensitivity) with Topping TP10, it has kick, dynamics and of course very good details and soundstage. But the dynamics with 50 watter and high sensitivity speakers is more dynamic and easy to drive by Topping TP 10. If you have a low wattage speakers and your amp has low wattage, you will have high head room that avoids clipping, in case you accidentally pump up the volume. Klipsch RF 7 kicks with Topping TP 10, but the head room is limited due to its wattage. When you push the Topping TP 10 to 10 o'clock volume, it will distort. But with the 50 watter speakers, distortion comes after 3 o'clock volume. Topping TP 10 has low gain vol.pot, that is why I can go up to 3 o'clock. Likewise the Topping TP22 also has a low gain vol.pot for higher head room to avoid accidental clipping.