The AR 3a did NOT have a rear firing tweeter. Mine sounded wonderful driven by Dynaco MarkIII tube amps. They were FULL range, and could play ANY music accurately, from rock, to jazz, to classical. It wasn't until I heard the Fulton Js that I was forced to sell my AR 3a speakers. The Fultons are also full range, with a HUGE bass unit and electrostatic mid/high units. Without deep bass, the sound shrinks, and lacks foundation. Many instruments go into the lower 40hz, with great power. If your system cannot go at least to a true 35 hz, your sound will be compromised. When I went to the recent CAS, I was shocked at how small the speakers were. Yes, I was NOT shocked, given the small speakers, that most had little deep bass.