Bi-Amped Speaker Post Link

Tyerker · Jul 31, 2014

Sorry for the potentially confusing title...

I have a pair of Bowers and Wilkins DM601 S3 speakers that I bought used. New, they come with a pair of Copper Plates that link the posts in the back.

Like this:

However, mine do not have these. I have typically used a 3-4" piece of speaker wire to connect the posts. I have been scouring Google for a while, and can't seem to find anywhere that makes these, or even if / how you can buy them direct from B&W.

Any thoughts? I'd rather not have to cut and terminate 4 more pieces of speaker wire than I have to.

BobbyBubblehead · Jul 31, 2014

You won't be able to get replacement as the design is specific to old b&w... Once there lost... There lost.

Just get some open end spade connectors and a short piece of speaker cable and bridge them yourself.

I have some new b&W and there totally different so no point contacting the manufacturer.

Mandrake4565 · Jul 31, 2014

You can always go by a copper cheet and make them your self.

BobbyBubblehead · Jul 31, 2014

Mandrake4565 said:
You can always go by a copper cheet and make them your self.

Yes true enough its just two simple notches out of a short piece of bar.

Or short runs of speaker cable with 4mm banana plugs.

Really makes little difference so long as there's an electrical connection... Wire coat hanger formed to loop over the post will do

lol

EarthDog · Jul 31, 2014

Bar? That implies thick. I'm sure 1/16th is plenty thick enough for the purpose it is used for... And likely exponentially cheaper... As is speaker wire already mentioned.

freeagent · Jul 31, 2014

Cut up some old lamp cord :thup:

BobbyBubblehead · Jul 31, 2014

EarthDog said:
Bar? That implies thick. I'm sure 1/16th is plenty thick enough for the purpose it is used for... And likely exponentially cheaper... As is speaker wire already mentioned.

The originals are 1mm thickness
Here's a link to a source of 1mm bar
http://www.gindre.com/copper-products/flat-copper-bars.html

In engineering terminology bar is what it be

Tyerker · Jul 31, 2014

Thanks for all the input guys. Looks like speaker wire might be the best solution available.

EarthDog · Aug 1, 2014

Post pics when its done!!! :thup:

BobbyBubblehead said:
The originals are 1mm thickness
Here's a link to a source of 1mm bar
http://www.gindre.com/copper-products/flat-copper-bars.html

In engineering terminology bar is what it be

"sheet" was the term floating around in my head... :clap:

BobbyBubblehead · Aug 1, 2014

EarthDog said:
Post pics when its done!!!

"sheet" was the term floating around in my head...

I quite understand where your comming from edog.

It's more my NVQ level 3 and city and guilds in engineering that drilled terminology into me. Lol

I even had a procedure list forming in my head on the originals.

1. Cut bar to length
2. Mark holes centres
3. Scribe notching
Blah blah...

Its a precise business that engineering and if I got it wrong some oil soaked instructor maniac would chase me around the workshop with a bar... More than 1mm thick. Lol

Anyhoo...

Final thought is always terminate a single wire to the top binding posts... As the high frequency driver needs every chance of receiving a good electrical connection :salute:

Tyerker · Aug 9, 2014

Here is the finished product...

BobbyBubblehead · Aug 9, 2014

That'll do just fine... And no hassle to unplug if needs be :thup:

Enjoy

Railgun · Aug 15, 2014

Out of curiosity, have you tried to contact B&W? If not, I can ask my local shop if they can source 'em if you really want them.

BTW: Go Bears!

Tyerker · Aug 15, 2014

Railgun said:
Out of curiosity, have you tried to contact B&W? If not, I can ask my local shop if they can source 'em if you really want them.

BTW: Go Bears!

That would be awesome if you could put out some feelers for me! The speaker wire is working OK right now, but I'm sure the original posts are designed for the ideal connection. :thup:

BobbyBubblehead · Aug 15, 2014

Unless someone has some laying around and actually knows what there for it aint gonner happen.
More importantly it wont make any difference.

If you want to really make sure its not effecting things (though its not anyhoo) then buy more cable and us them without the bridge.

Yes you can use two runs of cable from a single set of amplifier posts :thup:

Tyerker · Aug 15, 2014

My former roommate had a 7.1 amp that had a bi-amp feature, so we used that. Mine is just 5.1 without a biamp feature, though.

I was hoping to avoid bare cable if it was possible, to avoid oxidation, but I'm not sure it is.

BobbyBubblehead · Aug 15, 2014

Still improvement to be had from bi-wire. Two runs of cable terminated at the same amplifier posts. How much depends on the equipment used

NiHaoMike · Aug 15, 2014

It would make even more sense to have two separate output stages for the high and low frequencies. The high frequencies need less voltage and lower voltage MOSFETs are easier to switch fast. There's just not much hardware out there that supports such a configuration.

Railgun · Aug 19, 2014

Tyerker said:
That would be awesome if you could put out some feelers for me! The speaker wire is working OK right now, but I'm sure the original posts are designed for the ideal connection.

So B&W flat out doesn't have them available anymore. So wire it is.

Bi-Amped Speaker Post Link

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