If you really do not want subs and your goal is LF extension, the JBLs will not likely work for you. Their efficiency and other things are maintained in part by early bass rolloff. The spec graph is on JBL’s website. I am completely unfamiliar with ’70s JBL but can tell you the 4367s are very flat, deigned for good dispersion in the home and unromantic. They are stereotypical studio monitors but have a laidback presentation. There is not another model you are considering that loads a room l like they do, is well blended from mid to high freq or is as dynamic.
The booming sound from your proac audition was likely a combo of your position and speaker position in relation to the room. Walk around a little during auditions.
The booming sound from your proac audition was likely a combo of your position and speaker position in relation to the room. Walk around a little during auditions.