Intregrated Amp for Thiel 2.4 s

First suggestion is don't do it... Too many people have tried to power thiels with an economy mix of electronics and regretted it. Pick up a very good used power amp for at least $2-3k used. I personally prefer the Sim Audio Moon W5 for this. If you are able, run the source direct into the power amp initially. Add a tube linestage down the road.

The 3 essential criteria for any amp powering thiels are power, current, damping factor. You want about 200 wpc into 8 ohms. Something that doubles the power as the resistance halves. Very high damping factor, don't go less than 400. Damping factor advertised by the manufacturer is computed with 8 ohm load. The W5 damping factor is 800 but my thiels drop to 2 ohms so at that point the damping factor is only 200.

Glai - damping factor is determined by dividing the load resistance by the output resistance of the amp. The W5's output resistance is 0.01 ohms at the low end but increases slightly in the upper frequencies. The W5 has zero global negative feedback. The tonal balance is neutral. The control is visceral but it also has a touch of sweetness which allows it to convey delicate passages with the proper neuance. The gain is 33db which means it can be used without a preamp providing you have some means of volume control in the source. But IMO it sounds its best with a tube linestage.

There is no perfect or best amp. Power amps should always be considered based upon the speaker they will be driving. For speakers like thiels the w5 deserves very serious consideration.

There is another audiogon member, bunkeromantik who has thiel cs2.3 and purchased the w5 based partly on my recommendation. You might contact him or maybe he'll see this thread and chime in.