I Made My Own Audiophile Power Cable For $79 And You Can Too!

 October 3, 2025

#523

Gentle reader,

The word "Audiophile" gets thrown around a lot and is the main reason that there are so many extremely expensive audio components speakers and accessories for sale out there. Many are made of pure snake oil. 

Others are made by companies which are trying to introduce affordable alternatives to three or four figure "Audiophile Cables". The three components below were purchased from two separate sellers on eBay.

I began a search on eBay and soon found a bargain from the US seller "iceageaudio". He offers custom made power cables of several different types. Plus, he will sell you cable by the foot. His thing? "Cryogenically Treated" cables.  He explains the process in clear language on his eBay pages. I have purchased hospital-grade AC outlets which had been treated that way. Is there anything to prove that subjecting plastic and metal things to being deep frozen for three days will make it better? I don't know. But to get 10-3 (10 gauge 3 conductor cable) for $10 a foot seemed like a great bargain to me.
It used to be that to get an IEC DIY plug to make your own detachable cables meant buying directly from sellers in China. Well, these mostly-metal beauties, are made from solid aluminum billet from a US-based seller by the name of 
HiFi Audiophile | eBay Stores. They have a great number of cables of many kinds at extremely good prices. Those two plugs were only $18.79 with FREE shipping!
Before they arrived, I tried to put this thick cable into a Hubbell 15 amp 3-conductor plug. As you can see, the outer insulation (this cable is rated for 600 volts) is just too thick to fit it.
As you can see, that hole will definitely accept that thick cable. See below:
As the old saying goes, "Like it was made for it!" Because it was. These plugs are thick, heavy and extremely well made. The four holes around the shell at the cable end, have 2mm Allen set screws in them and the plastic portion of the plug has a separate sleeve which adds extra insulation and also centers the plastic parts in the billet aluminum housing. Tightening the screws and "it ain't movin'!"
In case you are unaware, when it comes to the sizes of wiring the smaller the number, the larger the wire is. See below:
Image courtesy of Worlds Best Cables, Inc.
I replaced ALL of my listening room's system cables with WBC cables bought via Amazon. Because I needed a short pair of speaker cables from my Marantz MM7025 power amp to connect my 1990's Dynaco QD-2, the only way to get short ones was to buy two 7 gauge center channel speaker cables which are three feet long. See below:
With all of the fabric covering and shielding, they are crazy thick and heavy. 7 gauge is  much thicker than 10 gauge. Note the black strap suspending them. This was needed because the three-way binding/banana terminals on the Marantz power amp are not very strong.
Just look at how thick the 10 gauge insulated wires are! The smaller cable, which has molded on are the same type of plugs as I am using but with tiny 18 gauge wires. Yes, there are three insulated wires within that outer insulation, just as in the thicker cable. BTW, that skinny cable came with my new HP PC which is what I am typing this article into. I custom made a power cable for it to. Was it needed? Probably not. But, I like thinking that what I am doing is making things work better. It used to be called "tinkering".
Since this only shows it in millimeters, below is one with metric and "standard" or "imperial" measurements:
To convert 0.102 inches to they way we, in the US, divide inches by factors of two, well, basically, the bare 10 gauge wire is just a bit thicker than one tenth of an inch.
Here is the completed cable next to the 18 gauge power cable for my PC.
The power cable I was using for my B&K Components ST1400 solid state power amplifier was the cable in the middle. It is shown closer up below. 
I have a PURE|AV power conditioner as part of my modest "home theater" in the living room. I had an older one powering all of the electronics of the "office" stereo stack as well as all of my PC equipment. However, it died. I dissected it, took the internal electronics to the Hazmat/Electronics Recycling building of our local landfill and recycled all of the metal bits. I kept the cable because it is made by BELKIN and is high quality and is shielded. BELKIN sells it by the foot for projects too.
"Why shield a power cable?" you may ask? I'm glad you asked. North America's power grid has an alternating current electricity which cycles at 60Hertz. In other words, every second, it switched from positive to negative sixty times. Most of the rest of the world uses 50Hertz and higher voltage than we do. 
Note the two AC power cables seen above. The PURE|AV one is plugged into my Douk Audio Nobsound DJ587 tube power amp. It too came with a very thin power cable. Also note the new cable which I just made, plugged into my currently-out-of-the-music-circuit 
B&K Components ST1400 solid state power amplifier which is currently serving as a platform for the tube power amp. 
Also note the presence of RCA cables bringing the music signals from the preamplifier to the power amp as well as the WBC speaker cable cables leaving the tube amp. 

Here's the thing: The sound of 50 or 60Hertz AC current cycling is in the audible range. In other words, if audible, is sounds like bass notes of music. That sound can be picked up by cheap (thin RCA cables, for example) which run parallel to AC cords or cables and you can hear it in the music as a hum. Some call that sound a "ground loop".
Thus, the power cable of that now-dead PURE|AV audio power conditioner would be in close proximity to audio cables and thus, BELKIN shielded it to prevent that from happening so that their customers would be happy.
Above, on the left, is the typical, mostly plastic, IEC connector plug one can buy via eBay or Amazon. They are almost exclusively made in China. Nothing really wrong with them, but notice that the cable is crooked going into it. Then look at how centered the one is going into the massive all metal plug. 
This is the business end of the IEC plug which is the one I installed on the 10 gauge power cable. A bit blurry here, but each slot is marked which helps one to put the correct wires: white, black or green, in the right holes inside so that the three wires will be safely separated from each other and can do what you want them to do. 
"N" left side above, means Neutral, "L" on the right means Load and the center one has the ground or "earth" symbol and takes the green wire. The copper conductors are barely visible and are quite close together, insuring a tight and safe connection. In fact, it took some hand pressure to get solid metal plug into the socket on the B&K power amp's power receptacle. Seen below, one the bottom left corner.
Below, is a handy guide to determine which wire does what.
This chart shows United States home wiring color codes. Three conductor cable, such as I used to make this cable has: Black, White and Green. Black is "hot" or "Load". White is "Neutral" or return and Green is "Ground". Some other countries use: Blue, Brown and Black. Perhaps your country does too.
This is the face, or "business end" of the mostly-plastic and cheap IEC power plug. It too is labeled. Note, that the conductors within (which grip the three rectangular pins of components and computer power supplies) these one are further apart and thus might have a less than ideal connection.
This image shows my right Dynaco A25XL speaker moved out of the way in order to run the two power cables which I tied together with orange Velcro strips.
This is a closer view of the power cables path to plug into my new 
PURE|AV AC power conditioner. Note how I routed the speaker cable to the left Cerwin-Vega! LS-12 speaker so that it runs parallel, but separated from the power cable of the PURE|AV unit. The coiled speaker cable (it is best to keep speaker cables the same length) is to the right black speaker.
This is the beige BELKIN power strip which I have been using for years with the listening room system. It predates ordinary people being able to buy and use CAT cables (Ethernet) in their homes. The small telephone plug sockets are marked: Input (wall), Output Phone/Fax/Modem, which clearly dates it.

All of my stereo's components which have separate (removable) power cables, I use PANGEA AC14 cables. Above is the ONE AC9 unit I used for a while. It is so thick, that it is difficult to bend it to get it to where one needs it to go. Note  the black shrink tubing on the right (output) IEC plug. The factory IEC (molded on like the wall plug on the left) plug had failed and I replaced it with one of the cheap Chinese ones. The tubing helps it look more factory. I notified potential eBay buyers of my having replaced the defective plug. It sold for a whole lot less than I paid for it.
This is a rear view of the system after replacing the B&K power amp with my new Marantz MM7025 power amplifier. Note the thick 7 gauge speaker cables and the blue PANGEA power cables. Every replaceable cable in WBC branded, except the AC power cables. 
And, here is the prettier end of all of the components. The matching two units, lower left, are ADCOM ACE-515 power conditioners. I need two since I have so many components. Their presence allowed me to not worry about "dirty" AC power muddying the music's sound. Thus, using the beige power strip shown further down in the article.
And finally, here is the listening room. It was a very long journey to get here. 
The Robb Collections: The Transformation from Den to Audio Man Cave. In many crazy steps!  

Originally it was the "master" bedroom and had a passthrough to the bathroom which held a vanity and sink. All that is gone, in there now is a tall metal wire shelf. We call that area an "alcove". You can just make out the B&K power amp in front of the LP record shelf. That amp drove the fifty-year-old Dynaco A25XL speakers. Now, it is the Douk Audio four watts-per-channel tube power amp which drives them. Both pairs of speakers have 91dB sensitivity which makes using such a tiny power amp drive them loudly. I never dreamt that I would have more than one power amplifier and be able to use all three of them at once if I wanted to!

NOTE: For your Safety: Do NOT attempt to work on or create your own cables without a thorough understanding of the dangers involved in doing so. Do something incorrectly and your work might start a FIRE and that would be the end of your stereo and possibly much more. I have been working on electrical things since 1973, including thirty-five years working on Subway cars which run on 750 Volts DC power. I know what I am doing and do so safely. You have been WARNED.

Thank you So much for taking the time to read this rather long article. Music is so very important to me and being able to share Nancy and my collections with you by my writing this blog is and continues to be a labor of love. Feel free to comment below or via Facebook. I write two other blogs: Pictures of Nancy. The Love of My Life. and: People Say I'm Special. But I Don't Know Why

Scott Robb
October 3, 2025
# 523

Douk Audio Class A & AB Pure Tube Audio Matching Power Amps & Preamps

 October 1, 2025

Updated October 2, 2025

#522

Gentle reader,

Since I came across a Chinese designed and made all-tube power amplifier at a bargain price on eBay, which I wrote about here: The Robb Collections: World Premiere Review  of Douk Audio's Exciting new Class A DJ587 Tube Stereo Power Amplifier! I have continued to be Douk-curious. I updated that article with what I thought was THE matching preamplifier. Turns out, I only knew part of the story.

All Douk Audio images courtesy of Douk Audio.

Well, it turns out there are at least two different ones, both using the same chassis, but with varying numbers and types of tubes. The DJ198 preamplifier is pictured above.
"This!" I'm channeling Doug DeMuro again, above is their DJ417 preamplifier. Note the numbers of and configuration differences. I had come across a DJ918, but it turns out that was a typo as it is "Identical!"* to the DJ198. *remember: My Cousin Vinny
This is identical to the DJ587 power amp which I reviewed and am thoroughly in love with. It is advertised as a "Class A" power amplifier. 
And this, is a DJ511. Note the differences between the two of them. The DJ511 is a "Class AB" "Push-Pull" power amplifier.
This is the rear of the DJ198 preamplifier. 
And this is the rear of the DJ417 preamplifier.
These are the four tubes which the DJ198 preamplifier uses.
These are the six tubes used in the DJ417 preamplifier.
This is what is inside the factory assembled DJ198 preamplifier.
And this is the insides of the factory assembled DJ417 preamplifier.
The much simpler (looking) Do-It-Yourself version of the DJ198 preamplifier.
And this is the insides of the DIY DJ417 preamplifier.
I am 69 years old and had my first job as a fledgling auto mechanic in 1973. My father had a Hallicrafters multi-band tube radio when we were growing up, just like this one. IT was my first experience with tube audio equipment. I was allowed to take it to work so that I had music. IT received AM only, WGOE was my rock station. What I knew about tubes then: It takes a while to "warm up" to make sound. And, do not stick your fingers or anything else inside the back of the radio. That was it.
This was Nancy's father's actual Hallicrafters multi-band tube radio. It still worked when we were dating in the early 1990's. Nancy inherited it. I have not tried to see if it still works. It might.
This is a Hallicrafters Civic Patrol radio I found in an antiques store and bought. It does nothing but buzz. Maybe the frequencies are no longer used. I do not know.
This dangerous and I-do-not-even-want-to-try-and-see-if-it-works, Philco radio I bought for five bucks, also from an antiques store.
These are is it's guts after I cleaned them up and put them back inside.
This is an identical, but slightly older Philco I bought via eBay for ten bucks. It is in surprisingly good condition and has the proper factory knobs.
When it arrived, the back cover had been shoved in a bit during it's trip to our house. I removed it to fix the cover. I found everything clean and shiny inside, much to my delight. As you can see by the tube's glow, it works. It's AM only, but it's from 1937 and it WORKS!

What I have learned about tubes since then is: Tubes operate at high voltages, thus the three transformers verses one, the AC power transformer, in solid state equipment.
This is the back of the DJ511 power amplifier. Note a single input.
This is the back, identical to my DJ587, power amplifier with two swtiched inputs.
The insides of the factory assembled DJ511 power amplifier.
This is the eBay photo of a DJ587 which was in the eBay ad for the one I bought. I have not taken the bottom cover off to see what may be much different (based upon every other unit in the series) that what this photo shows. Perhaps more like the other factory assembled units shown above.
To satisfy my own curiosity, I decided to take a photograph of the insides off of my DJ587 and found that it is wired exactly as the factory photo shows. Based upon that plus the angle of the factory's image (verses vertical images of the other three models), I am concluding the following: The DJ587 (may be) the first in this series of purely tube equipment. The other three models followed with the factory built option using far more "modern" PC boards loaded with components verses the kit ones which contain far more traditional wiring methods and electronic components.

Note: All of these new product images were made by Douk Audio employees in China. I secured all of them from their eBay product ads on eBay. The vintage equipment (minus the first Hallicrafters photo) were made by me.

Now, that you have the model numbers of the two preamplifiers and two power amplifiers they have produced so far, with this chassis. I look forward to reading your comments regarding the differences between the two sets of fraternal twins. For instance, which of the two designs is better.

One last thing, if you are a tube aficionado, what benefits could one expect by using NOS tubes or Soviet ones compared to the modern day Chinese made ones? 

Thanks for taking the time to read this, the second chapter, of my new interest in tube driven stereo equipment. Feel free to leave a comment below, or via Facebook.

I write two more blogs, but have not updated either in a while: Pictures of Nancy. The Love of My Life. and: People Say I'm Special. But I Don't Know Why

Scott Robb
October 1, 2025
#522
 

Upgrading Your AC Audio Power Cable's IEC Plugs To High End Units Step-By-Step Guide

  October 8, 2025 #526 Gentle reader, A few days ago, I showed you how to make an Audiophile AC 10 gauge Power Cable with High End plugs on ...