I have found out that JBL's titanium composite tweeters are best for long term listening. Also at JBLPro monitor's information page it is said that these are used in pro monitors because they don't cause ear fatigue. Also in my home speakers, MRV308s, there are composite titanium tweeters.
When I listened to different speakers years ago, I found the tweeters nice compared to others. Also recently when I aimed to go to a hi-fi shop and listen to JBL Studio L890s, but these were not available, the salesman asked me to listen to B&W 804s which sounded very harsh compared with my nice sounding home loudspekers MRV308.
So, my question is: Are many loudspeakers made for only short listening periods, for e.g. to concince buyers in a shop, but not for all time listening (6-24 hours a day)? Studio monitora are made for 7,5-8 hours/day listening, so should I the buy these rather than home hi-fi speakers optimized for 30 min. sales playing?
And, are L890's all titanium & Mylar tweeters equally nice?
Have you got experience on these?