TT Power Cord

Good points by Lew and Moonglum, IMO.

Also, a common sense point that seems worth mentioning is that the turntable's power cord should be kept as far away as possible from the phono cable, to minimize coupling of EMI or RFI from the power cord to the phono cable. It wouldn't surprise me if the main reason some people report benefits from upgrading the power cord of a turntable were that the shielding of the upgraded cord reduced that effect, as Lew alluded to. The magnitude of that effect, btw, figures to be highly dependent on the design of the particular phono stage, on the characteristics of the cartridge that is being used, and on the shielding provided by the phono cable.

And, seconding another point that Lew made, a well shielded power cord does not have to cost a great deal of money.

Regards,
-- Al

I had three different AC cords on my Walker Proscenium turntable, all sounded different. The Omega Micro AC cable that Lloyd Walker recommended (at that time) proved to be best.

AC cables proved different on my Basis Debut Gold MK4 and MK5 and even the older Versa Dynamics. It seems motors do like being fed with better AC supply cable for whatever reason.

With my Technics MK2 and current MK3 in my system I've had at least five AC cords on the motor controller/power supply. Each cable provided a different level of performance.

The one I kept is a more moderate investment but in the future, after I recover from Stillpoints Ultra 5 and other recent purchases I'll upgrade this AC cable as well.

Perhaps even more strange is the effect of the AC cord on my Focal Grande EM power supply. All this does is turn the woofer into a field coil. It's not an amp nor does it power the crossover. I tried four different AC cords and got four completely different levels of performance.

Unfortunately the most expensive option was too much performance gain for me to pass it up.

I know cables are a bone of contention for many and that's to be expected. I remember a number of years ago when lots of people claimed amplifiers all sounded the same.

More recently people claim all wire (interconnect and speaker) sound the same. Anyone claiming they could hear an interconnect were delusional.

There are some converts since then and I think AC cables will be sorted out as time goes on. In my experience an AC cable can be a bigger upgrade than an interconnect. You have to test and listen for yourself.

Hi Lew,
Sincere apologies, I think I came across as more of a “hard-liner” than I actually am. On occasions I’ve heard differences when using the braided Kimber cables too.
The comments weren’t directed at anyone on the thread least of all your good self. Just a series of generalisations and past experiences. :)

As an aside, back in the 1970s popular methods of improving the mains took the form of e.g. zener diodes wired back-to-back. Later, the more fashionable “transorbs” emerged.
Folk tend to attribute audible differences to placebo but I can think of one amusing example where the results were incongruous.
In the late 1980s audio enthusiasts, including myself, started experimenting with VDRs for mains interference suppression. Commercial exploitation of the idea came a few years later with packaged products but at that time the bare components were purchased and shoehorned into mains plugs or onto the unit’s mains connector. The outcome wasn’t, “We can hear a positive difference and everyone should buy these” but rather Users felt the VDRs were negatively affecting the dynamic response of the system, so the general consensus was to STOP using them, not promote their use.
(The important thing to note here was that they/we heard a difference – even though the results were unacceptable)
Later, the commercial sellers rationalised it as VDRs having a genuinely beneficial effect, but that it “exposed weaknesses in the signal chain, highlighting the shortcomings of the equipment in use”.
Whether this was true or not (i.e. placebo or not) is again a matter for debate, so, tactfully, I won’t comment on this.

Al makes an excellent point about screened cables preventing EMI pickup. A similarly opposite benefit can come from the braided Kimber cables i.e if used on switch-mode power supplies they prevent their characteristic hash from getting back into your local mains supply, so not only suppressing incoming interference but the outgoing stuff as well.
Perhaps the primary focus should be shifted from the non-domestic Mains Network to domestic i.e. unplugging non-essential switch-mode PSUs, motors and anything likely to unbalance the Mains when listening, and generally shut down all non-essential appliances (apart from the fridge)? This gives the average system a flying start before they even look at interference suppression.

One of the main concerns for me is not so much the electrical implications of cables but their mechanical effects – especially if hooked up to something associated with the turntable. (Many cables have the aspect of a hosepipe and are much heavier). Resonances being channelled through cables as mechanical conduits can have very undesirable effects (and I’ve proved the mechanical effects in blind comparisons so I would echo Al’s suggestion about careful cable "dressing" and also resonance control. For a turntable, good cable dressing could be more significant than the electrical benefits of cable swaps.)
Best regards….

I know Stringreen - many people swear by the improvement they hear with a change of power cords. My ears just aren't good enough or trained enough or they're just partly/mostly made of tin - I just can't hear it! :-(

Now I HAVE experienced a big change with power conditioning equipment, or glorified surge protectors, whatever you want to consider them. I had put a Balanced Power Tech Clean Power Center (CPC) into the mix, plugging all of my 2 channel system components into it. There was an immediate change in the sound - and I didn't like it. It sounded flat, lifeless, even seemed to strangle the volume. I took it out of the system and put in a Furutech E--TP80, what they call an "AC Power Distributor." Again, immediate change, but for the better - the sound opened up, sounded dynamic and full, it sounded RIGHT.

Rather differetnt from the experience of the reviewer at 6Moons:

On balance, and being excused for generalizations, I'd characterize the e-TP80 as a somewhat valve-reminiscent component that shaves off edge, increases glow and expands things to slightly larger-than-life size which, if you add it all up, makes it the perfect antidote for many affordable systems suffering the exact opposite. And affordable systems are most likely to be the natural mates for this affordable conditioner that offers enough outlets to accommodate a complete such setup. Which brings us to the BPT CPC. Despite its affordability, it seems tailor-made for truly expensive systems where its greater honesty, finer-boned finesse, greater rhythmic time keeping ability and stronger focus not on the grande gestures but minuscule constituents all fall into the service of resolution enhancement which, let's face it, tends to be the cornerstone that expensive systems are built upon and assembled around.

(http://www.6moons.com/audioreviews/furutech2/1.html)

So, as you can see, my ears are suspect...or I just don't have the expensive system needed to appreciate what the CPC - and perhaps power cords -can bring to the table!

Holly

Moonglum,
I was not in the least offended by anything you wrote before my post. Skepticism is a needed commodity in this hobby. In your last post, you wrote:

"A similarly opposite benefit can come from the braided Kimber cables i.e if used on switch-mode power supplies they prevent their characteristic hash from getting back into your local mains supply, so not only suppressing incoming interference but the outgoing stuff as well."

What would be the mechanism for that effect of the Kimber cable, which I noted previously is easily converted to PC use? Do you think it's just the capacitance? Along those lines, I think one of the main benefits of an outboard tt motor controller that re-synthesizes AC is the same, motor noise is prevented from going backward into your local AC circuits.