UREI 813 speakers (A B or C lettered). Big dynamics, time aligned and used on plenty of mixing consoles. Of course they need to be played LOUD to sound best. Not everyone's cup of tea, with the right electronics they are the most dynamic speakers I've ever heard.
Excellent suggestion - these were legendary in their day. Many of these famous horn studio speakers have been or are being replaced by modern speakers like ATC SCM 150 or 300's (Pink Floyd used Urei 813's until they switched to ATC around 1990) - hence for $2K you can often find some used 80's studio speakers at a very good price (some are just sitting in storage waiting for someone willing to restore them). Also try to look for used JBL 4435's or even Westlakes (although Westlakes are rare and rather expensive even used)