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I purchased two Wharfedale W70 speakers probably in the 1960s. One of the two connected to the same amplifier will no longer emit sound. I removed its back and all wires are soldered in place and all three cones are not damaged. Howerver, all three speaker cones, the tweeter, midrange, and woofer seem to have a problem with their coils. I live 30 miles west of St. Louis, MO and need to know where in the St. Louis area I can take it for repair. wcrosby@fidnet.com

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6ya6ya
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Posted on Jan 02, 2017

Benimur
  • 6966 Answers

SOURCE: karaoke speaker,no woofer or midrange working, only tweeter

Hi, it's probably that the 8" woofer and the midrange of the "amped" enclosure is open. One way to test is to remove just one wire from the inside of the enclosure to the woofer or midrange in question and with the use of a continuity tester (or a VOM), check for the resistance of the coil of each the 2 speakers. Both should read anywhere from 4-8 ohms, if there's no reading (VOM needle will not move) then the coil(s) are open. In the absence of a tester, a single AAA or AA battery would do (pls. some would argue that this is not a sound practice, however this should be enough for you to be able to determine the condition of the coil(s)). With the use of the battery and a single short length of electrical wire, apply power from the battery to the terminals of the speaker, if the cone moves, then chances are it is good, if they don't then you would have to replace it. Am not sure if available in your area, but there are some trained people who can rewind the coil should a replacement speaker be not readily available. Hope this be of help. Please let us know how things turn up. Regards.

Posted on Apr 15, 2007

SOURCE: Wiring diagram for Altec Lansing Vs4221 Right Speaker Wire

red-positive . blue-negative and if another colour mostly brown-Earth.

Posted on Jan 17, 2008

  • 8 Answers

SOURCE: headphone jack point

dont mean to state the obvious but have you tried another set of earphones? ie.. maybe its a problem with the cable

Posted on Mar 01, 2008

TJBENGR
  • 121 Answers

SOURCE: Tweeters & Midrange Speakers

If you have a Ohm Meter, check the resistance to the speakers. If it is very high, the speakers are burned, (or the crossover is (just capacitors, and resisters...cheap)). If it is close to 4 ohms check the wiring and connectors..to and at the speakers, most likly the receiver/amp is not blown.

Posted on Apr 20, 2008

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SOURCE: no sound out of tweeters, highs out of woofers?

it does sound like you shorted out your crossover which can be fixed if you know what you are doing, but in the long run i would try to get another one i know that raidoshack sells some small ones and is also cheap, if your positive that you didnt short out the crossover se if it needs power, see if you can cross your woffers and tweeters on the crossover, if not is there any settings that u can change on the crossover? hope i helped :)

Posted on Apr 28, 2009

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The voice coil of your speaker is scratching with its magenet body inside. It can't be repaired. Whatever we do will go in vein. there is no possibility other than replacing this speaker. Some people will recone it, but qulaity cannot be assured. it will sound; but with respect to the other speaker, it won't match. Coil position, resistance, number of turns per unit length ete are determining the magnetic strenth of the coil, and therby sound. Wharfedale eill have its secret, and they wont give it out, as they have gained it with tremndous reserch.
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wharfedale-diamond-sw150-subwoofer-p251q2jbxgw5dhyonjje5nyi-1-0.png

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burntoutrelay-1j5nmx55ziexsnaam3wj35o0-4-2.jpg

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