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In Reply to: RE: Plastic vs. aluminum posted by Salectric on September 25, 2015 at 02:43:23
Have to keep it quick because I have house guests waiting for breakfast, but,in short, the plastic 32 is very fat and rich in flavor and the metal one is much drier. Both are fairly laid back, smooth, and not brash and shouty like a 511/811.
With either one it would probably be advantageous to use some EQ in the crossover for a touch more HF at the top sparkle range. I chose to use the metal version in my project initially because it has a bit more subjective definition up high but when I have a chance I will swap in the plastic one again with the 728B. My listening evaluations over the past weeks were with a 414A/Onken.
I will measure both in the coming days. So far, I am flying by ear.
Although the mouth geometry looks about he same, the plastic one is about 1" shorter at the driver end, possibly to help prevent the end of the horn from snapping off if the speaker is manhandled...these horns were used in stage monitors and the like.
I'd say the plastic one is a sensible choice, particularly given the relative high availability and much lower price. It looks like a piece of junk plastic from my Volvo's AC system but sounds very nice.
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Free your mind and your ass will follow -- Parliament/Funkadelic
Follow Ups:
Watch it, Joe. I like Volvos:)
V70, the preferred ride of the urban gear hustler.
Fits a pr of Petite Onkens but only one Altec 828 cab at a time.
I'm on my 3rd one. Best car evah!
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Free your mind and your ass will follow -- Parliament/Funkadelic
Thanks Joe. Your comments are very helpful. I actually have both the plastic and metal 32 horns and have used them both, but in different cabinets. Since the mounting dimensions are different, I have not been able to swap them back and forth to hear how they compare. In each setup I have used an 802-8G and a crossover that includes eq circuits from the Altec 9849A which used the same driver and a 32 horn.
I compared them sitting on top of an Onken box. You are correct...the front mounting flanges are not the same size. Why did they do that?
I am holding off on routing out a rebate for the front lip of the horn in my new project until I decide which 32 to use or whether I will go with a 32 at all.
The WE 728B plays quite high..."almost" doesn't need a tweeter but ~8k just isn't enough HF for most modern listeners.
If somebody has a better suggestion for a sweet tweeter that will match the flavor of a 728B, I'd like to know.
I hate to put a crossover on the 728B down in the 3k range since it is so good playing full range, but I'll try it before abandoning the notion. It sure works in the 757A, et.al.
Generally, however, the antique collector notion that the metal 32 is great because it is more "WE like" and the plastic is cheap modern trash does not really hold up in practice.
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Free your mind and your ass will follow -- Parliament/Funkadelic
Joe,
What do you think of an open baffle w the 32's and GIP's?
Something like these Shindo's but w the 32.
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