There were other Altec Biflex driver models, as well. 12" and 15" "pro" (PA) and hifi versions.
I don't recall the model, though (and they are in a box in the basement, and it's getting late, and I am preternaturally lazy...)
Told you this would be the case. I'm not a first time poster, just been a while and forgot my log in details. Again, don't listen to any naysayers who haven't heard what they are talking about. Otherwise it's just imagination....running away again.Bear in mind a lot of us are more than "armchair" engineers and many of us have heard many full-range single-driver designs over the years. But finding a pair to listen to these days is somewhat challenging... And we all listen to our systems, as well as live music (and some perform as well). The Lii-15's use a whizzer cone IIRC to help with HF dispersion, a very common design practice among engineers armchair and otherwise. With advanced driver parameters (e.g. T-S parameters) leading to better crossover designs multiple drivers took over to offer smoother frequency response over a wider range with greater broadband dispersion and less distortion. Not to say there aren't sub-optimal multi-driver designs around...
The resurgence of single-driver designs I liken to the resurgence of SET amplifiers; more for the nostalgia than any real performance advantages. Plenty seem to like them, and that's OK, but pre-emptively attacking those who do not care for them due to valid technical and audible reasons seems petty.
A lot of older speakers were 16-ohm impedance and thus easier to drive than today's systems. Low power and compression (usually horn-loaded) systems seem a popular combination. There are even new field-coil designs; everything old can be made new again. Field coils have some interesting things going for them, but eat a lot of power in the coil (not necessarily from the audio amplifier).
In my very limited experience ”yes” you get the single acoustic source and in case of for example active KEF’s the phase is compensated via DSP .
you better make a coax speaker 3 way for best performance and or add sub(s)
You seem to be a real collector.There were other Altec Biflex driver models, as well. 12" and 15" "pro" (PA) and hifi versions.
And, yeah, a pair of 15 inch Altec Biflexes here, too.
Fukuin/Pioneer also made smaller dual-compliance cone drivers that were rather similar to the Biflexes.
Besides being sold under the "Pioneer" brand, these were also sold by some US and European (British, at least) catalog retailers (e.g., Lafayette Radio Electronics, in the US).
"Any there, Marky?" I hear you ask.
Ahem.
He certainly put us in our place!Oh brother, here we go with a first time poster telling us to use our ears.
No one could take that as an insult
Ever tried playing with the various crossovers for the 604? Although these days DSP might be even better (blasphemy; right?)I'm a fan -- but, of course, not single drivers.
Coaxial, of course, but two separate drivers.
Two pairs of Duplexes (604B and 604E) here -- neither currently in use, though (and in full disclosure).
in situ and complete with audiophile-grade dust.
To this day most pro drivers use an accordion surround. You can get a tiny amount of clicking or slapping at high excursions, but otherwise it's superior at centering the cone and lasts quite a while.
Thankfully no; nobody manufactures such a terrible speaker, today.
Not with the horn, perhaps. You obviously haven't seen the FR of a lot of full range drivers.
Show me, especially the historical ones everyone is drooling over here.
I'm sure they were scary, uhm I mean full of character, too
