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Well,  I decided to fix up dad's old B&W DM-16 speakers. I can remember these in the living room in the house in Gatton when I was 3, and in the house in Toowoomba after that until my early 20's. So they feature in my earliest memories.

 

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They were still in fairly good condition for their age with just a few dings in the corners here and there. Unfortunately the crossovers are way out of spec so it's all bass. 

 

@muon* has been kind enough to do the recap for me. I'm getting small 0.01uf Russian silver mica bypasses across caps on the tweeters and mids against Ian's better judgement. It'll either work well or not.  If not I'll replace with Duelund JDM bypass caps. Guess I'll see.

 

So I know what goes where ;)

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Crossover with original caps

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1st sand back. They've been removed from their integrated speaker base so I could work on them. I'll restore the speaker base later.

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1st coat natural tung oil 

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3rd coat natural tung oil. Still wet.

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Speaker cloth done 

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I'm just awaiting some polymerized tung oil to do the 4th and 5th coats. I've decided a satin finish won't cut it. High gloss will bring this beautiful woodgrain to life  :)

 

Some more random pics

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Edited by MattyW
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Yeah I'm not won over my SM Caps in every position, but who knows, this may make me eat my hat....if i had a hat :lol:

 

Cabs are looking nice, Matt :thumb:

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Posted (edited)

I'm sure it will be better than it currently is. As you've mentioned crossover design seems poor anyway though it should be sufficient for the second system downstairs. It'll be used in my home theatre setup, a speaker switchbox to a separate amp & DAC for music. It's main use will be movies though with my fantastic DIY centre speaker and Dayton USA PS180-8 based surrounds.  :)

 

Seeing as the front of the speakers lack any kind of identification I've these custom badges on the way. I'll figure out where to place them on the front baffle when everything is pretty much complete. With the choice of speaker cloth the drivers and badge will be available through the cloth.

 

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Those last pictures were taken while the tung oil was still wet.  The beautiful woodgrain prompted me to order high gloss polymerized tung oil as satin finish just doesn't do these cabinets justice. I want to really bring that natural beauty out.  :)

Edited by MattyW
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Just awaiting delivery of some polymerized tung oil before I sand back and do the 4th coat. It's coming from the US so may be a while. 

 

In the meantime I have 600 and 1200 grit sandpaper here plus 0000 steel wool.  They'll be lovely when done.  :)

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On 05/03/2021 at 12:48 AM, MattyW said:

Well,  I decided to fix up dad's old B&W DM-16 speakers. I can remember these in the living room in the house in Gatton when I was 3, and in the house in Toowoomba after that until my early 20's. So they feature in my earliest memories.

 

 

 

They were still in fairly good condition for their age with just a few dings in the corners here and there. Unfortunately the crossovers are way out of spec so it's all bass. 

 

@muon* has been kind enough to do the recap for me. I'm getting small 0.01uf Russian silver mica bypasses across caps on the tweeters and mids against Ian's better judgement. It'll either work well or not.  If not I'll replace with Duelund JDM bypass caps. Guess I'll see.

 

So I know what goes where ;)

20210111_100010.thumb.jpg.fa717d72d01dba99e1dff97f7cd32007.jpg

 

 

 

 

 

Crossover with original caps

20210207_215346.thumb.jpg.adcf46d516d21467d8e14d4d57c48f98.jpg

 

 

 

 

 

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Speaker cloth done 

 

 

I'm just awaiting some polymerized tung oil to do the 4th and 5th coats. I've decided a satin finish won't cut it. High gloss will bring this beautiful woodgrain to life  :)

 

Some more random pics

 

 

 

 

 

Nice job with the cabs, they have come up a treat.

A quick google tells me that B&W have recommended removing the speaker protection circuitry from the crossover.  Apparently there's a relay that can go noisy over time  and the rest does nothing good to the sound.  A schematic diagram of the crossover would help a lot.

I suspect the relay is the white plastic box centre top of the XO and the speaker protection circuitry is the smaller resistors and caps near the top left, maybe the components around the relay also.

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Very nice mate.  Always a treat to see speaker restoration.

I'm working on a pair of Celef, Mini Pro Monitors.

 

Looking forward to seeing your B & W's up and running again.  As part of your childhood, I can imagine the love you have for them.

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Posted (edited)
1 hour ago, RoHo said:

Nice job with the cabs, they have come up a treat.

A quick google tells me that B&W have recommended removing the speaker protection circuitry from the crossover.  Apparently there's a relay that can go noisy over time  and the rest does nothing good to the sound.  A schematic diagram of the crossover would help a lot.

I suspect the relay is the white plastic box centre top of the XO and the speaker protection circuitry is the smaller resistors and caps near the top left, maybe the components around the relay also.

 

Yes, the APOC circuit will be disconnected. It steals dynamics from everything I've read. Will just do the recap of these. Have decided to leave out the silver micas. Not going to do a full rewire and crossover rebuilt or anything. I'm sure they could be amazing if that were done though the thing to remember is these will be in my second system,  not the main system.  It will be a very nice improvement in performance as is.

 

They're not so pretty just now as I didn't wipe off the excess tung oil after the 3rd coat.  I didn't see much point since they'll be sanded back 3 more times yet and polymerized tung oil applied rather than the natural tung oil I have been using.

 

The way these looked wet convinced me I want a high gloss finish to bring the wood to life 

 

1 hour ago, BuzzzFuzzz said:

Very nice mate.  Always a treat to see speaker restoration.

I'm working on a pair of Celef, Mini Pro Monitors.

 

Looking forward to seeing your B & W's up and running again.  As part of your childhood, I can imagine the love you have for them.

 

This will be a while as I expect the polymerized tung oil I'm waiting for from the US will be 4-5 weeks.  No biggie as I'm in no rush.

 

I'm taking my time on these and want them to look as good as they can.

 

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Edited by MattyW
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  • 4 weeks later...
Posted (edited)

Still waiting on the polymerized tung oil.  It's been in Australia since the 25th of last month but still hasn't been delivered yet. Will get here eventually with some luck  :)

 

The only work done is @muon* has kindly recapped my crossovers for me. Will make a nice improvement with APOC circuit disconnected,  and some big caps removed which weren't really doing much of anything.

 

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Edited by MattyW
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Was good to get those firecrackers out :D

 

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Posted (edited)

Just getting everything back in spec will bring a massive improvement. Tighter tolerances than when the original caps were new.  :)

Edited by MattyW
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The leg on that Janzten Superior is wonky on the right XO and messing with my OCD!

 

Back in a sec :lol:

Edited by muon*
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Posted (edited)

Coming up nicely 

 

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Edited by MattyW
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Struggling to get an even finish on these. Might try car polish next 

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