Not to side-track the thread, but in response to Czbbcl's comments about his AR 90's being "soft" on the extreme top end, these speakers are relatively linear out to appr 23 KHz. Some tweeters marketed at "super" tweeters won't even go this high. As you've noted, these speakers need GOBS of power to work their best. My experience is that if you can feed them with a real 350+ wpc @ 4 ohms, your starting to get close to what you really need : ) Sean
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