DIY speakers based on Dunlavy speakers.

I heard these speakers by someone who tried to build Dunlavy SC V1 clone type speakers. They used two Focal Audiom 15 inch woofers. The model number for the woofers were 15VX. These were top of the line Focal Audio 15 inch woofers, 2 Focal Polyglass midbases. The model number for the midbase was 7K6411 and a Raven R2 ribbon tweeter.
The speakers were about 6 feet tall and weighed 335 pounds.

They speakers had a nice soundstage and the bass was tight with good extension. These woofers were very impressive.
Now, he couldn't do a crossover like Dunlavy. Dunlavy could make speakers that used ok drivers, but make the speakers sound great.

I remember i heard the Dunlavy SC-IV speakers that used all Vifa drivers. These speakers had an amazing soundstage and sounded very layered and the bass was fast and tight. I always though what could Dunlavy have designed using top of the line drivers like Focal at the time or Scanspeak.

Here's a pic of the speakers he designed.
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I always though what could Dunlavy have designed using top of the line drivers like Focal at the time or Scanspeak.

If a designer uses adequately sized drivers with a reasonable passband then prestige drivers have little if anything to offer over decent standard range drivers because nonlinear distortion is likely to be below audibility at normal SPLs. It is when drivers are too small or use an inadequate number of ways (e.g. 2) that prestige drivers may bring noticeable benefits. Dunlavy speakers were of adequate size with an adequate number of ways. The low order crossovers did require good behaviour over a wider passband than normal but this was at a reduced level at the upper and lower end of the passband.