Wharfdale laser 120 speakers - UK Vintage Radio Repair and Restoration Discussion Forum

kirstyd · 11th Aug 2022, 8:25 pm

I picked these up earlier this week. The cabinets are scruffy but they work and sound rather good so today I set about removing the speakers and tweeters so that I could spruce up the cabinets. it was then I noticed that one of the crossover units had been altered. the first two photos are of the unmolested unit. The last two are of the other which has a capacitor missing and what looks like a replacement cap that is the wrong rating. Both the large speakers and the tweeter are working. Would it be a good idea to just replace all of the caps with new ones?

paulsherwin · 11th Aug 2022, 8:46 pm

I wouldn't put a lot of effort into these, as they are pretty run-of-the-mill speakers. If you want to use them you could just replace any dodgy looking electrolytics with polyprops. No need to spend money on boutique caps.

kirstyd · 11th Aug 2022, 9:14 pm

Yes that's what I thought Paul but should I replace what is missing? If I have a look around in the garage I probably have what I need anyway so no need to waste money.

Diabolical Artificer · 12th Aug 2022, 8:03 am

Quote:

should I replace what is missing?

Yes, the caps and inductors form LC filters so that frequency to the drivers rolls off at the right frequency, if there's a missing C ther filter won't work properly.

Andy.

paulsherwin · 12th Aug 2022, 9:27 am

If one of the crossovers is complete, just use that as a model for the other one.

kirstyd · 12th Aug 2022, 11:40 am

ok thanks guys

11th Aug 2022, 8:25 pm	#1
kirstyd Heptode Join Date: Mar 2014 Location: Leeds, West Yorkshire, UK. Posts: 902	Wharfdale laser 120 speakers I picked these up earlier this week. The cabinets are scruffy but they work and sound rather good so today I set about removing the speakers and tweeters so that I could spruce up the cabinets. it was then I noticed that one of the crossover units had been altered. the first two photos are of the unmolested unit. The last two are of the other which has a capacitor missing and what looks like a replacement cap that is the wrong rating. Both the large speakers and the tweeter are working. Would it be a good idea to just replace all of the caps with new ones? Attached Thumbnails

11th Aug 2022, 8:46 pm	#2
paulsherwin Moderator Join Date: Jun 2003 Location: Oxford, UK Posts: 27,971	Re: Wharfdale laser 120 speakers I wouldn't put a lot of effort into these, as they are pretty run-of-the-mill speakers. If you want to use them you could just replace any dodgy looking electrolytics with polyprops. No need to spend money on boutique caps.

11th Aug 2022, 9:14 pm	#3
kirstyd Heptode Join Date: Mar 2014 Location: Leeds, West Yorkshire, UK. Posts: 902	Re: Wharfdale laser 120 speakers Yes that's what I thought Paul but should I replace what is missing? If I have a look around in the garage I probably have what I need anyway so no need to waste money.

12th Aug 2022, 9:27 am	#5
paulsherwin Moderator Join Date: Jun 2003 Location: Oxford, UK Posts: 27,971	Re: Wharfdale laser 120 speakers If one of the crossovers is complete, just use that as a model for the other one.

12th Aug 2022, 11:40 am	#6
kirstyd Heptode Join Date: Mar 2014 Location: Leeds, West Yorkshire, UK. Posts: 902	Re: Wharfdale laser 120 speakers ok thanks guys