Good day. I have a couple of reference speakers from the 70s and they gave them to me in the early 80's. I don't know if they had the factory connections but I didn't take note of them when I took out the speakers to find them. This speaker is 4-way, 8 ohms and a power of 70W. The woofer is connected directly, I assume that to work as an extended range, knowing that its impedance increases progressively close to 1kHz. Then he has a medium low, a medium high and a cone tweeter that I changed to 3 piezo Leson. The question is generated in the media speakers, according to how they were connected: Medium low : 4 "with semi-rigid suspension, open hood, and an aluminum cap with absorbent material that gives room to the speaker and does not allow it to interact with the air produced by the woofer. Medium high : 6 "with closed hood and acoustic suspension. I found little info on the web about these speakers, but guided by other models of the brand and 4-way, the 6 "speaker is the medium low and the 4" the medium high, that is to say the reverse of how they were connected. This will be so, because if we look at the photos attached, the 6 "is closed bell and the magnet is small; the 4" is open bell and has a large magnet, it seems contradictory: -o. Well, I await your comments and / or suggestions. Greetings. [url=/ver-adjunto/aHR0cHM6Ly9jZG4yLnlvcmVwYXJvLmNvbS91cGxvYWRzL2RlZmF1bHQvMDAwMy82NC9CYWZsZXMtNjkyMDkuemlw] [img3/atng/bng/bng/bng/bng/bng/bng/bng/bng/bng/bng/bng

Hello I agree with colleague Gabriel regarding the change of Tw piezo for the originals, although for some the TW Le are sound great, it goes a lot in tastes and personally I prefer the cardboard ones because of the naturalness of the sound, the piezo give you a very sound plastic and artificial, but now I really like this, as do the sub, which I hate, but I tell you ... it's just personal taste, the problem you pose is knowing if the middle of 6 is medium high or low, I think that this is a low medium, and that of 4 a medium high, that depends on how it was originally connected, what you can do is inject frequencies to each one through a low power amplifier without crossover and see how they respond, individually, The loudspeaker having a tonal compensator is correctable, however, when found, the original frequency response of each one is lost, because no cones, suspensions, coils, original wings are used but generic as these spare parts are not achieved today, greetings and good luck.