ATC

The magic with speakers is that they all present the signal very different in your  room (a little less when you apply room correction). The joy is to have several different but high-class speakers to choose from. ATC is a wonderful reference to all the other. But if you don't turn up the volume you may not experience this. As said above the SCM25a is probably not the best choise outside the recording studio.

@ Kenjit,

back to your original question. As an ATC fan I also have other darlings. Actually I often use only the basses in the ATC 150asl and active xover (Lyngdorf) the mids and tops from about 250Hz to e.g Audiovector SR1 Avantgarde Arreté, Lipinski L707, Tannoy DC10a or some Quested monitors. Gives me a bit different presentation and great joy. The Lipinskis have the best imaging and dynamics I think. ATC can play louder though. Would like to try some horns with the ATC basses but don’t know which yet. Maybe a diy JBL combination. Thoughts welcome :-)