Sansui au 2900 for dedicated 2 channel vinyl?

If it were me, for a room of that size and given your musical choices I would probably go for an "old school" speaker:
1- I still think that the A25s will work great, but so will the SP-200s.
2- Another good, low cost option is the Boston Acoustics A60, A80 or A100. They all sound similar except for the increased bass response as you go up the line.
3- The Snell K/II, J/II and E/II are great, undervalued speakers. They sound good, are bulletproof, easy to place and cheap.
4- My opinion is that your room is probably too small for vintage Klipsch speakers. There are those who would disagree, but they do pump out a lot of bass and can overwhelm a smaller room.

Good luck.

I am using a Sansui AU-217 for an amp on my PC speakers. Sansui used a glue to hold board components in place prior to wave soldering. this glue over time usually eats through the component leads. You may want to check your unit and look for oxidized leads. Also bypass the power supply caps with film and foil units, as well as the interstage coupling caps. Amazing how nice these units can sound.

best

Thanks for the added suggestions Br3098

And thanks Johnss for your insight regarding the Sansui units. I'll be sure to take a close look at it when it arrives.

As far as the speakers, I've heard so many great things about the A25's that I really want some! I guess I'm afraid this little amp won't make them sing as they should and I'll be disappointed.

I don't really understand power ratings on amps...I'm pretty new to all this.

The back of the amp says: AC 240 Volts - 50 Hz
Power 110 Watts

I believe this is a 4 channel amp...so how does this equate to 15 WPC? It's listed on a Sansui website I found that it's rated 15 WPC. Little confused and that's why I'm concerned with the A25's because I've read where people suggest nothing under 35 WPC for these speakers.

Can anyone help me with this...?

1- Your amp is a stereo unit, not quad. You are seeing 2x 2 channels (A & B) - that's very common on 70s/80s consumer gear.

2- I believe that your amp is rated at 25W per channel. I could be wrong, but that is what is listed on one of my reference documents.

3- I've already said all that I need to say re: the Dynaco speakers. Find a pair and give them a try or go to something else. This is vintage gear - there are no guarantees. If you want guaranteed compatibility you should probably be looking at new gear, or at least gear that is still supported by the manufacturer.