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Multi-Way Conventional loudspeakers with crossovers

Wharfedale Glendale
Wharfedale Glendale
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Old 23rd February 2019, 01:19 AM   #1
Malcolm67 is offline Malcolm67  New Zealand
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Default Wharfedale Glendale

Greetings, i am doing a bit of a restore on a pair of Glendale XP2 and was wondering if anyone knows what the value of the metal oxide resistor should be, the existing ones are showing signs of what looks like heat damage or just the colour coding is deteriorating, the existing ones are also reading two values,one at 152.3 ohm and the other at 165.3 ohm

Want to replace them but need the proper value, thanks.
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Old 23rd February 2019, 09:31 AM   #2
raymondj is offline raymondj  United Kingdom
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Can you not verify the colour because they are so badly discoloured? Could you tell us what you think the colours are or post an image?

If you lookup resistor values from the E12 or E24 series values they could be 150, 154 or 160, 162 ohms.

I have tried a google search for Glendale XP2 crossover/images and there are a few images, but I cannot read the 1/2 watt colour code. There is a big green 5W 21ohm nearby. Is that your crossover?

As they wont be too expensive you could buy new 3/4 or 1 watt values and select by ear. I am making the assumption the differences will be subtle.
Enjoy them.
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Old 23rd February 2019, 05:14 PM   #3
Galu is offline Galu  Scotland
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I'm familiar with various Wharfedale crossovers of the period, but know of none that include a 160 ohm-ish metal oxide resistor. I wonder what its function is?

A photograph of your circuit board would be most helpful.
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Old 23rd February 2019, 07:22 PM   #4
Malcolm67 is offline Malcolm67  New Zealand
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Hi thanks for the reply, i have put up a image of the resistor but it is badly dis coloured, there are a few images on google but they are also very hard to make out the colour codes, when you try to zoom in they just pixelate.
Attached Images
File Type: jpg IMG_1635.JPG (44.9 KB, 76 views)
File Type: jpg IMG_1636.JPG (113.5 KB, 76 views)
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Old 23rd February 2019, 09:30 PM   #5
Galu is offline Galu  Scotland
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The little 'pink' inductor at the bottom left seems out of place. Have you owned these Glendales from new or could a previous owner have modified the crossovers?

EDIT No, sorry - I see that both that inductor and the little resistor are present in the photos of the other boards.

Last edited by Galu; 23rd February 2019 at 09:36 PM.
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Old 23rd February 2019, 11:13 PM   #6
Galu is offline Galu  Scotland
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Being a relatively high value resistor, it is likely to be in parallel with an inductor to do some high frequency shaping. Have a look at the circuit board traces to see if you can verify this.

As suggested by raymondj, replace with a resistor of the same order of magnitude as you have measured, but of a higher wattage rating.
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Old 24th February 2019, 12:02 AM   #7
Malcolm67 is offline Malcolm67  New Zealand
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i have just recently purchased these and there is no sign that they have been modified as all the soldering looks untouched, and the previous owner had them since new,the inductor is supposed to be there according to a lot of images i have looked at on MR google, the tweeters are not working but that seems to be a common issue with the type of tweeter that was used at the time, and the resistor does appear to be in parallel with one of the inductors.I have emailed Wharfedale UK to see if they have any archive info on what the value of the resistor might be, i might be lucky but wont hold my breath. thanks
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Old 24th February 2019, 05:00 PM   #8
Galu is offline Galu  Scotland
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Yes, I see now that the crossovers are as intended.

Just replace the resistor with a 160 ohm 1W one. A variation of +/- 10 ohms is unlikely to be audible in this frequency shaping role.

The current Wharfedale UK won't be able to help identify the resistor as they don't hold records from the time of your Glendales.

Give more details re your faulty tweeters, someone may be able to help with their repair or replacement.
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Old 24th February 2019, 05:13 PM   #9
Galu is offline Galu  Scotland
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Here's some information on Glendale XP2 tweeter repair:

RE: Wharfedale Glendale XP2 - Tweeters are out! - Alfixit - Speaker Asylum
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Old 24th February 2019, 06:40 PM   #10
Malcolm67 is offline Malcolm67  New Zealand
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Default Glendale

Hi there, thanks for you help, i have actually come across that info on the tweeter repair,looks as if it is almost a surgical procedure, as the coil wire is so thin, mine has the same problem as the one in the article, but still may be repairable, although the coil wire has broken right at the dome of the tweeter so may be impossible to get enough conductor to work with without damaging the dome, looking at a couple of possible modification options as well.
Appreciate the advice, we need to keep this old gear alive
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