Oct 152018

I know a lot of you have been looking forward to the day when the 600V Duelund DCA12GA tinned-copper tone wire becomes available so you can use it to make DIY power cords, and that day is now here! Woo hoo!

The new 600VDC Duelund DCA12GA tinned-copper tone wire!

Today a spool of 600V Duelund DCA12GA tinned-copper wire arrived from Frederik, and it should be available from Parts ConneXion (for those in North America), and from Hifi Collective (in the UK), in the very near future (I believed it has shipped to them already, but I didn’t see it on their respective home pages when I checked a few minutes ago). To find the Duelund distributor for your particular country you can check HERE.

Frederik tells me that the pricing for the new 600V Duelund DCA12GA is still being finalized, but it should be in the range of about half that of the pricing for the regular DCA12GA, or around $10 USD per meter.

As soon as I find out the actual pricing for the new 600V Duelund DCA12GA I’ll let you know.

Bottom to top: DCA26GA, DCA20GA, DCA16GA, and DCA12GA.

The 600V DCA12GA tinned-copper tone wire uses the same stranded tinned-copper tone wire conductors as the regular DCA12GA tinned-copper tone wire that I wrote about in my review for Positive Feedback in Issue 92, which utilizes 65 strands of 0.25mm diameter tinned-copper wires (top DCA wire in the photo above).

The Duelund 6.6mH CAST Sn-Cu Air Core Inductors utilize Duelund DCA12GA leads.

The difference between the new 600V Duelund DCA12GA Sn-Cu wire and the regular Duelund DCA Sn-Cu signal wire is the new PolyCAST dielectric that was developed to allow for the 600V rating. 

Per the Parts Connexion description, PolyCAST is “… a unique thermoplastic resin composite, which emulates Duelund’s “Signature” CAST process”, which means it is similar to the deluxe CAST damping material that is used in the Duelund CAST capacitors, inductors, and resistor – the black material you see in the Duelund 6.6mH CAST Sn-Cu Air Core Inductors in the photo above.

That means you can now get that great DCA Sn-Cu tone in a 600V DC-rated line of DCA tinned-copper wires that you can be use as hookup wire in electronics where higher voltages are present, as in power supplies (i.e. using the 600V DCA20GA), and now with the 600V DCA12GA that you can use in your DIY power cords.

My first trial using the new 600V version of the DCA12GA will likely be comparing it to the original  DCA12GA version that I use as speaker cables in my main system, which is currently hosting the Duelund-Altec Project loudspeakers, those grand ol’ Stokowski Altec’s.

Stokowski Altec’s in my living / listening room.

That way I’ll be able to give you a better idea how the new 600V DCA12GA compares to the DCA12GA signal wire musically and sonically.

Then at some future point I’ll build up some DIY 600V DCA12GA power cords for my vintage McIntosh MC30 monaural amplifiers and report on that as well. Ditto for a power cord on my Fender Princeton Reverb guitar amp!

I think most of you know I love the tonal qualities that tinned-copper wiring so easily provides, and some of the gorgeous tone of my vintage McIntosh electronics was due to being wired up with tinned-copper wire internally, and if you read my last Duelund-Altec Project post, you know that vintage Altec’s also used tinned-copper wiring internally in their crossovers and to connect to the drivers.

McIntosh and Altec likely used tinned-copper wire during manufacturing for the pragmatic reasons of its ultra-stable electrical performance characteristics and durability over the long term, which really helped them from a reliability standpoint in manufacturing electronics, yet in a bit of serendipity it turns out that tinned-copper also contributed in part of the gorgeous classic tone those two vintage marques are known for.

Ok, that’s it for now. As always, thanks for stopping by, and may the tone be with you!

 Posted by at 4:38 pm

  10 Responses to “Today’s Fresh Catch: Duelund 600V DCA12GA Tinned-Copper Tone Wire!”

  1. Hi Jeff,

    I’ve been reading your blog a while now. Love your vintage audio and guitars. 🙂 I am wondering how big is your music room. I just got mx110z and mc30 and looking for a pair of speaker to go with. Any suggestions? Thanks.

    • Thanks for the kind words, Tuan, appreciated. 🙂

      My primary listening room (in the accompany photos for this post) is 27’6’’ long by 20’4’’ wide, and with variable ceiling height from 9 to 20 feet.

      For speakers I’d recommend a nice pair of vintage Altec’s. For example, there’s a nice pair of mahogany Altec 832A Corona loudspeakers for sale on eBay right now from LA Jazz Audio, who happen to be the same people that I bought my Corona’s from. Great speakers!

      Or alternately you could have Great Plains Audio (drivers) & Vintage Speaker Revival (cabinets) build you a new pair of Altec’s in whatever configuration you want.

      Kind regards,


      • Thanks Jeff. My room is half that size and standard height ceiling. Altec 832A Corona is efficient enough for mc30 right? Have you ever got a chance to listen to the like of JBL L300 or other pro version like L4333 and ect.? I was recommended to look for those but they are hard to come by 🙁


        • Hi Tuan,

          The Altec 832A Corona is very sensitive. I have my 832A Corona’s in a room that is quite large (only a little smaller than my main listening room), powered by a 5 watt single-ended-pentode amplifier, and 5 watts is way more power than they need even for very loud SPLs.

          The MC30’s would be more than enough power for the Corona’s – by a lot!

          Not that familiar with the JBL’s.

          Kind regards,


        • Hello Tuan,

          I have been listened JBL L300 a number of times in very good system.
          I have Altec 604E for 12 years.
          My opinion, JBL is much better at frequency extremes. Altec is much better from mid base to upper mids.
          Altecs is much easier to drive. The sound of Altecs has more breath and easy going.
          JBL are defensively better for rock music.
          Altecs are better for classical music.
          For jazz, Altecs sound like you in a small restaurant or cafe near jazz band is playing.
          JBL sound like jazz band plays at a big concerto hall or stadium.

          • Hi Alex,
            Thanks for the reviews! I listen to mostly Jazz, vocal, acoustic, and some blues. So I guess Altec is probably better choice for me since I prefer a small setting like cafe shop.

          • Hi Tuan,

            Your musical tastes are similar to mine, and the vintage Altec’s do jazz, vocals, acoustic, and blues music remarkably well, and make you feel like you sitting in a cafe or club listening to live music.

            I might also add that vintage Altec’s also do a great job on rock & roll, and a lot of the original rock & roll in the USA was played live over Altec’s, mastered in studios over Altec’s, and listened to at home over Altec’s, which means you get a very authentic sounding live-like listening experience from them.

            Keep your eyes on Jeff’s Place, as I am working up a post now from our friend Yazaki-san that is very relevant to your interests, and it should be posted in the very near future!

            Kind regards,


  2. Hi Tuan,

    Yes, Altecs are better for vocals for sure!
    They are also good for blues and for old rock music. For example, Beatles sound fantastic on Altec 604.
    They are not perfect for modern deep and powerful electric bass.
    But for most types of acoustic music they are very good.


  3. Hi Jeff;

    can you already estimate, how much wire is necessray to build a 6ft. power cable? I `d like to order enough for my
    MC30`s; will you use the Marinco power plugs?

    anxious to hear of your progress.

    • Hi Claus,

      If you want to build a 6-foot power cord you will need two 6-foot lengths (one hot, one return) if you don’t intend to use the third ground line of the Marinco plugs, and you’ll need three 6-foot lengths if you do want to connect the 3rd prong for a ground (hot, return, and ground).

      For my first trial I will use the Marinco plugs.

      If you get there before I do be sure to let me know how it works out!

      Kind regards,


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