To Be Determined

    The Importance of Keeping Your Audio Connections Clean

    Issue 156

    Back around 1980 was when I first started having some awareness of the importance of good audio connectivity. Of course, any of the mid-fi-ish equipment I typically had bought prior to then came with the usual garden-variety, thrown in, cheaply-made stock interconnects, and most everything had a captive AC power cord attached. We hadn’t yet reached the era of ungodly expensive cabling back then – I don’t even think it had really even become a huge thing yet, but I was at least beginning to read and hear about the value of upgrading to more substantial interconnects and speaker cables. I started buying cables via mail order from Vampire Wire, where I could at least get 10-gauge speaker cables terminated with heavy spade lugs, and they were significantly more robust than the zip cord I’d mostly been using all my life. I also picked up early-production interconnects from Monster Cable, which also seemed to be more well-made than the cheap and cheesy manufacturer-supplied crap cables. Of course, I wasn’t at all thinking about how the improved cabling might affect the sound of my system, I was mainly concentrating on just getting good signal transfer between components and loudspeakers. And I was, at the time, perfectly happy with that.


    I still have an old bottle of Tweek sitting around!

    I still have an old bottle of Tweek sitting around!


    Around that time I also first became aware of using contact enhancements from my local stereo shop, which sold a small bottle of a clear liquid called Tweek. It had a brush-on applicator inside the cap, and was intended to be applied to RCA plugs and jacks on both the cables and on the connected equipment, where it purportedly improved metal-to-metal conductivity. Tweek was pretty inexpensive, and a little went a long way, and back in those days, most cables and equipment termination jacks were made of similar metals. And some manufacturers were beginning to gold-plate connections, especially on higher-end gear. Tweek provided – at least, inside my brain’s thought process – better sound through enhanced conductivity. And you only had to apply it when you changed components, perhaps once a year to maintain good system conductivity.

    Unfortunately, there was a problem with Tweek that soon started rearing its ugly head: the problematic issue of dissimilar metals. If you’re unfamiliar with the term, it mainly deals with the concept that when dissimilar metals – metals that are unlike each other – come into contact with each other, they begin to slowly corrode. This can seriously degrade an audio connection. Tweek was causing a chemical reaction that was accelerating that degradation, and it was eventually pulled from the market following a barrage of consumer complaints. As boutique cable manufacturers began to appear with increasing frequency, many started using a variety of metals for terminations that didn’t always agree with whatever equipment they were connected to. Unfortunately, Tweek only made what could be an already bad situation much, much worse.

    Caig DeoxIT and DeoxIT GOLD G-Series are available in a variety of useful configurations.

    Caig DeoxIT and DeoxIT GOLD G-Series are available in a variety of useful configurations.


    Fortunately, other contact enhancers like Caig DeoxIT and DeoxIT GOLD G-Series (formerly known as Pro Gold) soon appeared to help assuage the anguish of those seeking perfect audio connections. And I was reading the other day on SoundStage Network’s website about another contact enhancer that’s infused with microscopic gold and silver flakes (depending on what type of termination your cables use) to provide better metal-to-metal contact. That particular manufacturer seems to have gone out of business since then (the link was dated 2003), but there are other, similar products that abound on the internet and that are still available; just do a Google search.

    I grew up in the farm country of northeast Georgia, and not unlike many of the young men in that 1970s demographic, somewhat fancied myself a bit of a cowboy. This required all the necessary accoutrements, including cowboy boots, a hat, and garish brass and silver belt buckles. The belt buckles were great, but I soon discovered that they required frequent polishing, which was a bit of a sticky wicket, to say the least. With time, I found the perfect polishing cloths – one for brass, a different one for silver – and also discovered that after polishing a buckle, washing it with soap and water and then drying and buffing it to a brilliant shine helped keep them glistening for much longer intervals. That was my first experience with keeping tarnishable metals pristine, and also with using products specific to each type of metal. I had no idea at the time that decades later, this would play heavily into my audio connectivity routine!

    Fast Forward to the (Current) Future

    A few years back, my system got completely upgraded with new interconnect, loudspeaker, AC power, and HDMI (for I²S connection) cables from AudioQuest (AQ). I also installed a pair of AQ NRG Edison AC wall outlets to the two dedicated AC lines running into my room, and added AQ Niagara 1200 and Niagara 3000 power conditioners. The new cabling and power conditioning have easily made the biggest overall differences in my system’s sound quality, with blacker, quieter backgrounds, and lending greater clarity to both analog and digital sources. If you’ve never used a power conditioner (AudioQuest actually describes the Niagara units as Lo-Z Power/Noise-Dissipation Systems), I highly recommend the AudioQuest units – the difference has been nothing short of dramatic.


    The AudioQuest Niagara 3000 is the real deal.

    The AudioQuest Niagara 3000 is the real deal.


    I’ve installed countless AC outlets, switches, and the like over a period of decades, but the installation of the AQ NRG Edison AC outlets was without a doubt the most labor-intensive outlet installation I’ve ever undertaken. Each Edison unit is constructed of heavyweight beryllium copper and weighs over a half pound; compare that to a weight of about an ounce for a typical construction-grade outlet. They’re wider and deeper than construction-grade outlets, but they do fit in conventional, new-construction outlet boxes – well, just barely! In my case, the difficulty was compounded by the nearly unyielding 10-gauge Romex dedicated lines I’d had the electrician install in those locations at the time my new home was built, and it was darn-near impossible to maneuver the wiring from the connections to the Edison outlets to get them to fit inside the boxes. I can usually do an outlet install in less than ten minutes, but it easily took an hour each to get the Edisons connected and installed! Yeah, I know – bring out the flamethrowers – the $189 (each) Edisons arrived weeks before the Niagara units, but the improvement in my overall sound was shockingly good with just those in place. The difference wasn’t subtle, and bass transients, especially from my dual subwoofers, were deeper and had much better definition, and both subs seemed to integrate much more effortlessly with my Magneplanars.

    The NRG Edison Outlets are really robust, especially compared to cheaply-made builder grade.

    The NRG Edison Outlets are really robust, especially compared to cheaply-made builder grade.


    AC power cords and connections aren’t really a big area of concern when it comes to maintaining conductivity. All my AudioQuest AC power cords – which range from their NRG X, Y, and Z series to their Blizzard with DBS cords – employ direct-plated gold connectors. And of course, gold doesn’t tarnish. But all the interconnects (AQ Yukon), loudspeaker cables (AQ Type 9), and HDMI cables (AQ Cobalt) employ heavily-plated silver connectors. I noticed that when I unboxed all the cables, each box included two types of polishing cloths, one for silver connectors and one for everything else. At that time, all those silver connections absolutely glittered – based on appearance alone, they’re a 10/10. But I’m also a firm believer in silver as a superior conduction medium in audio, and I’ve owned quite a few cables over the years that utilized either silver-clad or solid silver conductors. There are two trains of thought on silver cables: they’re either harsh and overly bright, or they add a significant level of clarity to the signal. I definitely fall into the latter camp. And needless to say, after getting everything connected, I put the polishing cloths out of sight, and out of mind.

    Houston, We Have a Problem!

    When my daughter had her new baby in December, we stayed at their house for five straight days, watching after my three-year-old grandson Henry, their two dogs, and a pair of guinea pigs. Prior to heading over there, I turned off the audio system and disconnected it from my home network, just in case there were any lightning events while I was gone (I didn’t yet have the fiber media conversion setup in place yet that would have protected the network-connected equipment from that possibility). The morning after we returned, I went back downstairs and reconnected and rebooted everything to get some music playing, and immediately noticed a problem. The right channel continuously fuzzed in and out, as if there was some kind of short. I went immediately over to the equipment stack, started futzing with the interconnects between my preamp and amplifiers, and when I jiggled the AudiQuest Yukon balanced cable in the right channel amp input, that exacerbated the situation. Holy crap, these cables were less than two years old – had one of them developed a short already?

    The AudioQuest Yukon balanced interconnects are exceptionally well-made.

    The AudioQuest Yukon balanced interconnects are exceptionally well-made.


    I have a huge box of cables in the storage area of my basement, and pulled out the Blue Jeans balanced cables that the AQ Yukons replaced. That totally solved the signal problem. The sound was now restored to a perfect level of connection, but it also sounded flat and lifeless. I reached for the Yukons to reconnect and take another listen, and at that point, I noticed that the silver input connector of the balanced cable was almost completely black with tarnish! I’d handled these cables countless times over the last couple of years, especially with the almost constant flow of review equipment in and out of my system, but had never previously noticed anything in their appearance that drew my attention – they’d always looked perfectly pristine. It was almost as though the tarnish appeared out of nowhere; the process could possibly have gotten accelerated when my system was completely down for months while my preamplifier was away for repairs. Regardless, this caught me completely off guard!


    The "silver" polishing cloth (on the left) was actually silver in color before removing all the tarnish from the connectors.

    The “silver” polishing cloth (on the left) was actually silver in color before removing all the tarnish from the connectors.


    I scrambled, located one of the silver polishing cloths, and proceeded to thoroughly polish, rinse and clean the connectors on all my silver-clad cables. And they all showed some level of tarnish and blackness, though none of them were anywhere near the level of the right-side balanced Yukon cable. By the time I finished cleaning multiple sets of interconnects, loudspeaker cables, and HDMIs, the formerly light-silver colored polishing cloth was now a very dark gray with the tarnish it had removed! After everything was reconnected and rebooted, the sound was restored to its previous state of audio glory. I was astonished, if perhaps a bit embarrassed by my negligence.

    I happened to think afterwards, that during the period from early August until November, when my PS Audio Gain Cell DAC/Preamp was off for repairs, that all the interconnect cables were just lying about the room, unconnected. Maybe this had accelerated the tarnishing process? The room is climate-controlled, so there are no temperature or humidity issues, so who really knows. But I’ve definitely learned my lesson: unless you’re using anything other than gold-plated connectors, you need to check them for cleanliness periodically. Probably once a year would be sufficient, and I definitely would still recommend getting an appropriate contact enhancer to assist with the inner pins of balanced and single-ended connectors and the like. Believe me, this stuff really does make a difference!

    All images courtesy of AudioQuest, Caig, and the author.

    11 comments on “The Importance of Keeping Your Audio Connections Clean”

    1. Have you tried any of the contact enhancers? I have tried several and was disappointed until i tried the Q45t from High Fidelity Cable. It blew me away with the improvement it gave my system.

    2. Now you’ve got me concerned about my AQ Mackenzie XLRs that are sitting, unconnected, while my own Gain Cell DAC/Preamp is back in Boulder (updating its USB input to play nice with an Aurender streamer). They’ve only been in use a little over a year, but I’ll take this opportunity to check them out closely.

      1. Craig,

        This really caught me off guard — I mean, seriously, I thought the right side Yukon XLR had developed a short. I couldn’t believe how cleaning the connectors so completely transformed the sound!

        Thanks for reading!


        1. Interesting occurrence after reinserting my repaired preamp, and I don’t know if it’s attributable to dirty cables or not. I was getting what seemed to be an emphasis on the left channel. So I put in a mono disc, and sure enough, the image was mostly left of center, and it took 10 detents of the balance control to the right for the image to appear centered. I was in a mild panic, not knowing where the trouble lay – right speaker, right monoblock, or the preamp. Since the preamp had just been in the shop, it was the only thing close to an unknown, so I started there by swapping the XLRs left for right at the preamp outputs. When I reset the balance to centered, and played the mono disc again, the image emphasis hadn’t moved to the right channel as expected, but was centered rock solid in the middle. So I swapped them back, praying that bit of cable fiddling was all I needed, and sure enough, images are back in the middle. I have no idea what happened, but it all sounds glorious again.

          1. I also had a similar channel imbalance problem once that was cable-related. I don’t know why, but the cable was the last thing I suspected to try and solve the problem.


    3. My balanced Yukons developed a habit of the center image shifting to the right. I cleaned them to no avail. I had to test left-right-center every time I listened and reseat them. I replaced the Yukons with a pair of used Waters. The improvement in overall sound in my system was stunning and well worth $375. No more center image shift.

    4. I am most certainly missing something. How did you clean your interconnects? I can see how you might clean the outside barrels, but how did you clean the pins and sockets with a cloth? How about a contact cleaner?

      1. Norm,

        Sorry for the delay, I reached out to AudioQuest, but they must be preoccupied or something and I still haven’t gotten a response. Yes, the barrels are heavily silver-plated, and it appears that the center pins of the single-ended interconnects are silver-plated. But the pins in the XLRs look like a different metal, and didn’t appear to be tarnished in the same way the barrels were. And while the cloths were perfect for the barrels, center pins, spade lugs, and bananas — obviously they won’t work for the inner pins and sockets. I’ll reach out to them again, they usually respond very quickly.

        Thanks for reading!


    Leave a Reply

    Also From This Issue

    They’ve Got Your Back

    Jim Anderson and Ulrike Schwarz: Immersive Audio’s Power Couple, Part One

    Married couples who work in the same field can often…

    Buyer’s Remorse

    Lightning Striking, by Lenny Kaye

    If you can measure a book by its playlist, Lenny…
    Subscribe to Copper Magazine and never miss an issue.

    © 2023 PS Audio, Inc.

    linkedin facebook pinterest youtube rss twitter instagram facebook-blank rss-blank linkedin-blank pinterest youtube twitter instagram