Quote:
Originally Posted by SomeGeoffGuy
In terms of the current Bose woofers in the doors - I would bet money that they perform well on paper. They have extended low frequency because of the noise cancellation - which generally runs well below 100 Hz. I bet they go down to 30 Hz or lower to cancel the exhaust 2nd and 4th order drones. I'll save them if anyone wants to run them through an analyzer.
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The AF GS690s go down to 42hz at -3dB, which is actually pretty low as 6x9s go. I bet the Bose speakers on their own don't approach that. It takes real money in materials to make that happen, whereas the whole point of the 2SS system is to spend as little on materials/hardware as possible - but use lots of those cheap drivers - and then make it sound decent with lots and lots of EQ. Hell, Bose made a huge company doing this with home stereos many decades ago. I bet those 6x9s in your doors are the equivalent of an Aliexpress 6x9 and won't go much below 60hz at -3dB. But they have a massive spike in the EQ starting around 60hz and lower to make up for it, and because they also have similar speakers in the deck, they can make it work. If you look those speakers up, they are almost identical to the 6x9s in the doors of 1SS cars, with teeny little magnets that can't possibly drive the kind of excursion required to get an honest 40hz from a 6x9.
It would be interesting to get a legit frequency response for them, though; just as it would to get the response of their input signals. If you ever get them measured somehow, let us know what you find out.