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PostPosted: Mon Aug 13, 2018 8:44 am 
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Location: London, ON, CA
I got a pair of speakers from a buddy the other day. My intention was to use them in my garage shop. They need some upgrades, but they are quite nice the way they are. The woodgrain vinyl cabinets look like they were purchased, not home-built; with cheesy screw connections on the back. A pair of proper binding posts would be a big improvement.

The woofers are Radio Speaker of Canada, Model WR10 (10 inch) connected to a pair of pedestrian Phillips tweeters with a simple capacitor for a crossover (2,5/35V … which seems like an odd value, but it might be right). Obviously the capacitors and wiring should be replaced, the soldering job is terrible, and there is no cabinet damping at all. All in all, it shouldn't cost much to improve things.


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PostPosted: Mon Aug 13, 2018 8:52 am 
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If you are good at woodwork, chop them in a certain fashion and you'll have some small open baffles! A more interesting sound...


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PostPosted: Mon Aug 13, 2018 4:33 pm 
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Hell of an odd way to attach the baffle.

The cap value is safe for that type of tweeter. If you wanted to lower the high pass point you have to steepen the slope. Resonance sounds nasty in a tweeter...

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PostPosted: Mon Aug 13, 2018 5:03 pm 
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The woofer is operating wide open with no inductor to roll off the higher frequencies. The tweeter alignment [1st order, rolling off at 6db/octave] is being brought in at around 7500 hz.... Assuming it's an 8 ohm tweeter.


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PostPosted: Mon Aug 13, 2018 5:20 pm 
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The tweeters are 8 ohms, but the woofers measure around 11. A buddy gave me a pair of AEON 2.7uF/250V caps, and I have some decent binding posts from a pair of Celestions I parted out. I have plenty of short lengths of 12 gauge speaker wire lying around.


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PostPosted: Mon Aug 13, 2018 5:58 pm 
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Location: Hamilton, ON, CA
Woofers in ESS Performance Series Model 9 speakers were without surrounds when I got them. I happened to have a pair of RSC Goldenaire WR8 which I then used to replace the original woofers. The result – a sonic gem.


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PostPosted: Mon Aug 13, 2018 6:16 pm 
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Quadzilla wrote:
The tweeters are 8 ohms, but the woofers measure around 11. A buddy gave me a pair of AEON 2.7uF/250V caps, and I have some decent binding posts from a pair of Celestions I parted out. I have plenty of short lengths of 12 gauge speaker wire lying around.


Quadzilla. No need to worry about the impedance of the woofers as they are rolling off naturally. Those 2.7 uf Aeon film caps are to bring in the tweeter are perfect for the job. Those original lytic caps on the tweeets would surely be miles out of spec by now anyway.
Further more, from a sonics perspective.....even the cheapest polyester film cap will stomp all over the best of the best of electrolytic capacitor technology.


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PostPosted: Mon Aug 13, 2018 7:16 pm 
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My experience with the 160T tweeters is that they are very efficient, and need to be cut back to be in balance with most woofers. I have used fairly simple resistor combinations, both inline and across the terminals, to do this.
Have fun with these.

Cheers,
Alec


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PostPosted: Tue Aug 14, 2018 8:57 am 
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Wiring is done. I just have to make up a couple of MDF plates for the new binding posts, and stuff the cabinets. They didn't sound too bad before, but I am sure that the new caps will make a world of difference. I will see if the tweeters are too hot and make appropriate adjustments. Thanks Alec.


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