I'm curious why so many tweeters? They are connected in parallel with a 10uF and a .22uF cap and three resistors. The tweeters measure 6 ohms and the 10" woofer 7 ohms.
Last edited:
mostly because one tweeter can't keep up with the woofer. Cone tweeters were mostly very low power and not that sensitive. That is one of the reasons they largely dissappeared and were replaced by dome tweeter, ring radiators and ribbin/planar/AMT type of tweeters (compression type or not). All those types go louder, and are easier to use than cone tweeters.
You still got some "fullrange" drivers that you can use as tweeter that use a cone, but they don't go loud at all. The Peerless TC9 series is a good example of those... I prefer a big bigger fullranges so you can at least use them to 250Hz at decent volume and use a WAW (woofer assisted wideband) configuration. Mine use a 5.5" Mark Audio Alpair 10.3 with a 10" woofer and so it can keep up. These tweeters here look more like 3" tweeters like the TC9, but probally less xmax and power.
You still got some "fullrange" drivers that you can use as tweeter that use a cone, but they don't go loud at all. The Peerless TC9 series is a good example of those... I prefer a big bigger fullranges so you can at least use them to 250Hz at decent volume and use a WAW (woofer assisted wideband) configuration. Mine use a 5.5" Mark Audio Alpair 10.3 with a 10" woofer and so it can keep up. These tweeters here look more like 3" tweeters like the TC9, but probally less xmax and power.
Is this a commercial speaker? If so, which make and model?
The "tweeters" don't look identical. Could this be two tweeters piggybacking on two midrange drivers?
The "tweeters" don't look identical. Could this be two tweeters piggybacking on two midrange drivers?
This is incredibly old. No zip code or even Postal Zone (2 digit) on the Pilot Radio address. 67 on one of the tweeters. 22 on another one, probably a replacement. Jensen in Chicago. The wikipedia article on Jensen Electronics has been edited to imbecility, but I imagine Jensen is no longer in Chicago.
I bought a KLH23 with a 3" cardboard cone tweeter in about 1974. I bought one replacement, and now I cannot find them in stock anymore. Fortunately I have moved on to Compression Drivers and plastic horns.
I bought a KLH23 with a 3" cardboard cone tweeter in about 1974. I bought one replacement, and now I cannot find them in stock anymore. Fortunately I have moved on to Compression Drivers and plastic horns.
The two right tweeters were replaced.
Can you draw up up the XO?I see something interesting. Make sure to include the resistor at the binding posts. It appears to bridge the two + terminals.
Can you draw up up the XO?I see something interesting. Make sure to include the resistor at the binding posts. It appears to bridge the two + terminals.
Last edited:
All drivers made early in 1964. 🙂
BTW, they are listed as nominal 16 ohm. That’s likely why the parallel wiring.
BTW, they are listed as nominal 16 ohm. That’s likely why the parallel wiring.
Last edited:
Drawing the schematic revealed that my assumption was wrong, two of the tweeters are actually wired differently so as @Galu suggested, two of them are likely used as mid-ranges
Last edited:
What a funny old speaker >
I would love to hear its sound, even given its ridiculous dispersion characteristics 🙂
I would love to hear its sound, even given its ridiculous dispersion characteristics 🙂
First impression was that it did not sound very good, unfortunately, the other has a woofer with an open voice coil and two of the smaller drivers have torn cones. I bought them because I like the cabinets and will restore them.