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Vintage Asylum Classic gear from yesteryear; vintage audio standing the test of time. |
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Vintage Asylum Classic gear from yesteryear; vintage audio standing the test of time. |
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In Reply to: How close was the WD-90 posted by E-Stat on March 17, 2015 at 09:26:07:
The MK 17 had a slightly more elaborate cabinet with a decorative molding around the front than the WD 90 But they were the same speaker inside.
The confusing part is that there was a variation using the same three drivers with a port and a slightly bigger box, and another variation with horns replacing the big cone mid and tweets, and still another variation that had 2 cone tweets but no mid as such.
If you read the specs on the ones with the 8-inch cone mid, it says the crossover frequencies were at 2500 wnd 3500 Hz, so it really added only a short (but important) frequency range. The paper-cone Utah 12-inch woofer was able to play quite high up compared with current 12-inch speakers (or even most avilable then), and then roll off smoothly without so much as an inductor. Part of the genius is in a design that required few crossover parts. Raw Utah drivers were well suited to simple DIY systems that did not get bogged down in a lot of esoteric crossover theory. That is where the David Weems books come in that used Utah-made Radio Shack drivers.
For fans of low-wattage tube amplication, I read that the Utah speakers are a very fine match, as they are far more efficient than most acoustic suspension designs being built in that time period.
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Follow Ups
- RE: How close was the WD-90 - DavidLD 11:41:11 03/17/15 (0)
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