A classical microphone can't but a microphone array like used in an sound intensity probe or an acoustic camera can measure (and visualise) the direction of the sound radiation but that's neither cheap nor problem-free due to the chassis driver sound dispersed around the housing so as you wrote, usually operating vibration modal analysis of the housing is done.
Yes it changes it not controls it.Unless you prefer changing over controlling, not sure what you are going after?
This non-fact about cross-bracing is published in the Loudspeaker Design Cookbook and is widely applied in better cabinet designs.
Considering real-world shipping costs and potential transit damage, light and stiff seems a better way than heavy and floppy. Heavy and stiff just seems the worst of both worlds. Those of a certain age might remember the Celestion SL600, which was effectively an SL6 in a (very expensive to manufacture) lightweight aerolam cabinet. The SL600 was more than twice as expensive (£699 vs £299 in 1985).
Increasing the resonant frequency by increasing stiffness has merit in a three (or more) way 'speaker with separate enclosures, such that the bass cabinet resonances are moved up into the midrange, where even though the ear is more sensitive, the bass cabinet won't excite those frequencies as they're outside the bass passband. It relies of course on steep crossover slopes and well behaved drivers. Ditto for the mid and HF, where resonances can be pushed up out of the way. In a loudspeaker with a single cabinet, the Harbeth approach makes a lot of sense.
I liked the original WATT. Auditioned the Grand Slamm and original WAMM which was huge and flash but disappointing, perhaps because there had been so much hype. In the same room the dealer had Goldmund Apologues which had massively superior instrumental timbre. I ended up with Goldmund Epilogs which were just superceding the Apologue.
Please don't remeasure the Neumann 80's.
Please measure the level of self generated noise on active speakers and everything coming out of the bass reflex tube.
Although to tell the truth, anyone can hear their inherent hiss and no one denies it, or do some? Its one of the prices to pay for paying much less compared to a Genelec, Neumann etc.
That has less to do with being 2 way speaker but being vertically a non coincident sound source, so it usually happens also on 3 or more way non-coaxial speakers. The advantage on the KH80 and the Revel C52 that it doesn't appear much is that they use small mid drivers (which can be crossed also higher), so a non-coaxial speaker with larger mid(-woofers) will always have it more dominant.
Similar to what B@W did in my 801s. Clearly wasn't rigid enough as they then went on to Matrix construction.
They usea new way of producing a lossy cabinet. The diaphragms are attached using a lossy compound to damp rather than simply to stiffen the cabinet.Makes me wonder if KEF really is a British speaker...
I would say no, it's Chinese... but that would be catty at best and in very poor taste at worst.Makes me wonder if KEF really is a British speaker...
