The LSA Signature 80 speaker is currently in production and should be arriving in the next month or so. I am really happy with how this design turned out. As the designer, of course I think it sounds great. I voiced it for a natural presentation that has clearly resolving highs but is non fatiguing. The midrange is lush and smooth and the chat punch is all there. I figured there will probably be more questions about this speaker as it gets closer to being released for sale by LSA so I am making a dedicated thread for it to provide a forum for questions and answers.
The exterior finish is without question, one fo the best I have seen. The rosewood looks so good, it almost looks unreal. I had to put it under a microscope to see that it is indeed genuine real wood. The craftsmanship is so good, one has to wonder how the cabinet makers can do this sort of thing. I know I can’t get anything like this myself in a wood shop.
Design is 2 way ported reflex (50mm dia vent on the back) with 7in aluminum cone midbass driver and 3in planar tweeter in a custom waveguide. Crossover is at 3.5kHz and uses all high quality film caps and large gauge pure copper wire inductors with audio grade non inductive wire wound flameproof resistors.
Premium Viborg binding posts with carbon fiber accents on custom CNC aluminum plate.
Cabinet is 3/4in MDF and 1.5in thick MDF on front baffle finished in gorgeous genuine rosewood veneer expertly applied with a satin finish coat.
Measured (quasi anechoic near field) frequency response is 38Hz (-6dB) and 22kHz (-3dB). Sensitivity is about 84.5dB at 2.83vrms and 1m. Polar response is uniform within +/-2 dB over 60deg inclusive angle for a wide sweet spot. Time alignment is precise and the soundstage and imaging are superb. The XO was designed to allow an easy to drive 8ohm nominal load (probably closer to 11ohms for most of music).
Here is the predicted speaker electrical impedance:
Here is the frequency response measurement in room (my lab) on a 40in high stand) - disregard response below 150Hz due to room modes, note the measured acoustical phase response and can be seen to be very smooth through the XO region for great imaging:
Have a listen (recorded with iPhone 12 Promax):
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