Amplifier Recommendation for Spendor D9.2 Speakers

if your room is large your mac may not be enough to energize the spendors. if your room is medium sized you can tube roll the small signal tubes and greatly improve the amps transparency and refinement.

amp choice also depends on your preamp.

my spendor d7.2 like your 9.2s thrive on tube amps and also class A solid state.

The rogue audio m 180 dark mono blocks have a smooth, powerful and neutral tube sound that merges well with the Spendors.

I currently have a Pass Labs Class A xa30.8 and it does very well too but not as refined as the Rogue Tube amps.

Previously owned the Spendor D9 speakers.  Started with a Ayre VX-5/20 power amp (SS 175 watts/channel) with a VAC tube preamp and then a Gryphon Diablo 300.   I have also listened to them with a DSA 100 watt pure class A amp.  They preform well will solid state and performed well with all the amps over 100 watts.  The speakers can be very precise in the tweeter section and tubes might smooth that a little, but the mids and bass do like some power for their best performance.

of course what @soix says is key and @hilde45's comment is spot on, the speakers are not hard to drive, many many amps will work well from a power output perspective

my personal view is that the spendor d series offers a lively fairly detail oriented sound, so i would err on the side of smooth, very high quality solid state gear (for better bass control) - think pass, hegel, classe, accuphase, ayre and so on

other option is to use stronger tube amps to get a more natural beauty to the music produced by the spendor towers, like better audio research, c-j, bat, vac, the like

better mcintosh could do well too, they have both ss and tube amps obviously, they impart a warmth and richness to the sound at some expense of ultimate resolution

Atma-sphere Class D.

You might like the Circle Labs M200 power amplifier. Here's a thread on Audiogon from other members who own Circle Labs.