Sizes measurements and the like.
I just received the usual daily dose of emails. Among them was a cool driver from Parts Express. It's their ES180TiA-8 model. Funny thing is that they use the same sized basket as I do. And I never considered my offering as a 7 inch driver. But upon taking a tape measure to the prototype basket in a nearby shelf I find it to be almost 7 1/8th inches in outside diameter. I squeeze a bit more Sd out the basket than did the engineer who designed it for Parts Express as I have the basket machined in strategic places to allow what I am looking for in terms of clearances. The basket is a very beefy design that has a great deal of potential. And I get a great surface area because the surround I use is custom designed for the sole purpose of a clean response and a long excursion. On that topic of surround for a clean response, I'm actually looking into making a double s type surround as well. It offers some further benefits in the higher frequency range.
Right now the surround we are using has a few applications of mass loading and dampening that have turned this driver into a clean mean pumping machine. ( oh yeah took me at least 30 seconds to think that one through! )
Displacement is one thing. But having a clean easy to listen to midrange is really the goal in a driver size like this. And an enormous amount of time on the design end was applied to making it so. Looking forward to the new batch coming. We are using the same custom cone, and a retooled surround to take advantage of the new motor's extra available excursion.
So maybe I should rename the KA6.5 as a KA7?
The 8 is actually larger than 8 inches to. Man all my model numbers are now out the door.
Well off to start the tractor. Winter is still here in Ontario. And we just received a nice dump of snow. So time to clear away all 250 cm or 10 inches of the fluffy stuff.
7/25/2018 06:20:15 pm
I'm considering these as replacements for my MB QUART 690 MCS woofers....dried out and torn surrounds. Daily use till then.....
7/27/2018 07:33:17 pm
In high fidelity terms I don't have a belief that a good driver has a distinct sound. A good driver when measured carefully has very little sound of it's own. A well engineered driver will reproduce sound with great fidelity to the original signal source. And add in little to nothing of it's own voice. Much of what I have read in the audio press about driver sound is poppy cock to be polite. Genuine bovine renderings that you can't even grow flowers with. Yes there are drivers that have a distinct sound. Tweeters that fool the listener into thinking that there is high end by generating cone breakups and the like. But in real life sound is pretty simple. If it adds nothing of it's own it reproducing what you want to listen to in the first place right?
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Mark's Ramblings, show and tell. And other sundries.