Markus Installs Dedicated Circuit; Bores Others With Constant Raving About Benefit

Posted by: Markus on 04 July 2006

“I’m gobsmacked”, pronounced the sometimes doubtful music-lover. “I thought there would be some kind of noticeable improvement, but I had no idea it would be this big.”

Dateline St. Louis
St. Louis music lover, record collector and Naim Audio equipment owner Markus the Naimnut recently installed a dedicated 20amp circuit to his listening room. While the erewhile benefits of such an installation are well known and widely publicized, in typical fashion, Markus immediately began behaving as if his experience were a unique breakthrough, remarkable, and something which the rest of the music-loving world should be informed about. “I want everyone to know about this”, Markus said. “There are many people out there who, while they know that these dedicated circuits can produce sonic improvements, are hanging back and spending their money on things like upgraded power amplifiers, power supplies and power cords.” When asked why it had taken him four years to get around to installing the dedicated circuit in his own home listening room, Markus merely shrugged. “I guess I’m sometimes slow to get it, you know. For years, every since moving to St. Louis, my main focus has been on buying up lots of used vinyl. You can get jazz here, soul, almost all of it is available. My only regret is that we don’t have any local store along the lines of Amoeba Records (Berkeley and San Francisco) where you can get the cutting edge stuff, you know, a decent selection of post-rock, downtempo and obscure so-called underground hip-hop.”

Naim Audio, a Salisbury, England company, manufactures a range of hi-fi equipment often noted for its sonic quality. Naim owners often become somewhat fanatical about their devotion to the brand. “It’s a lifestyle choice”, explained Markus. “You give up tone controls, tubes, those cool little meter windows that they used to have on power amplifiers back in the seventies, the whole bit. There aren’t even any of those cool walnut sleeves we used to get on our audio equipment back in the day. Even so, I like my Naim equipment and I’m sticking with it, at least for a good while longer.” When asked how long he’d owned his current setup, Markus explained its history. “I bought the preamp back around 1989 or 1990. Added the hicap a year or two later, and since then I’ve been gradually upgrading the amplifiers. I’ve owned a 140 (One of Naim’s well-regarded, lower-power amplifiers), a couple of 250s of various vintages. Now I’ve got my 135s. With the dedicated circuit, last night I was thinking “I can’t imagine that this sound could get any better.” Of course, I know it can,” Markus added. “There’s the whole new Classic range, which a lot of people rave on about, and I know there are better preamps out there than the 72. After all, it dates from the late nineteen-eighties.”

But over and over during our conversation Markus kept coming back to the tremendous sonic transformation wrought to his system through installation of the dedicated circuit. “With Naim equipment, the upgrade path is really pretty straightforward. And you can easily hear the benefit of any upgrade you are thinking about whenever you “do the dem”. “Doing the dem” is what we call it when we go to a Naim Audio dealer and have them insert whatever piece of equipment it is you are thinking about into the system. The classic dem used to involve Naim’s lowly, but highly regarded Nait preamp. After listening the Nait, which sounded pretty good in its own right, the dealer would make the switch to a 62 or 72 preamp and 140 power amp. This brought about an upgrade in sound quality that was not subtle. Adding a hicap power supply to the preamp took the system to another level and brought further refinement to the sound. After that, substituting a 250 power amplifier or a preamp from higher in the range simply continued to prove that Naim had clearly created a systems approach to music making which greatly simplified the process of puttng together a satisfying system.”

“But this dedicated circuit is a lot like doing the dem, and having the dealer either add in a power supply to the preamp or switch from, say a Hicap power supply to a Supercap. I’m amazed at the wide-ranging improvements to the sound. A layer of distortion has been removed from the system”, commented Markus. “Bass is smoother, more powerful and better controlled. But it is also amazing how much better the treble is—it’s more extended and natural. There’s more music there, more notes. You can hear more notes, believe it or not.”

Reaction on the audio forum boards Markus regularly posts on has been mixed. “He’s got to stop”, said one individual also known to frequent the Naim Audio Forum and also Pink Fish Media. “He seems to think that just because he’s heard the benefits to his system from installing the dedicated line, that gives him the right to go on-and-on about it here on the internet.” “That’s right,” chimed in another frequent poster. “He’s gotten to be a bit of a bore, you see. The rest of us, well, we’ve either already installed one of these dedicated circuits in our system, or we’re in a position where we can’t really afford it.” “I live in an apartment,” added a third. “There’s no way I’m going to spend that kind of dosh on an upgrade I can’t take with me when I move. Markus has really got to get off it, if he knows what’s good for him.”

Back in his listening room, Markus remains unrepentant. “I’ve simply got to get the word out,” he said. “I keep thinking of all these poor souls who keep upgrading their boxes. Upgrading boxes is good, so far as it goes. But with a dedicated circuit you can hear what the equipment you own is really capable of. And if you’re like me, you might just decide that you can happily live with the sound you’ve already got for a long, long time.”
Posted on: 04 July 2006 by Harry
Not such a big improvement for me but since we were being rewired it made sense. There is benefit but as you say the main thing is to get the basics done so that as you continue to build the system you are not potentially holding it back. Not practical for everyone admitted. As to the comments you redropuced above - who cares? And after being treated like that, why should you?

Enjoy Smile
Posted on: 04 July 2006 by thejejk
Ok Markus, NOW you've convinced me Smile

Good and unconventional write up!

/Jacob
Posted on: 04 July 2006 by glevethan
Markus

My vote for most creative post of the year! Winker

As a side note - how does a dedicated line work here in the States? My service from the street comes into a main panel in the detached garage. From there it then goes to three separate sub panels in the house. Would the dedicated line go to one of the subpanels in the house - or directly back to the main panel in the garage?

Gregg
Posted on: 04 July 2006 by Markus
Gregg,

My guess is that you could install it either way. We just had our house panel upgraded from 100 amp to 200 amp, as we prepare for adding a second zone A/C. If you have room on either your main panel or one of the sub-panels for an additional breaker, you could install it there. I'm kind of supposing that running it directly from the main panel would be the "best", but I'm not an electrician.

Markus
Posted on: 04 July 2006 by Alan Paterson
Is a 20 amp circuit enough? Someone recommended 50 amp to me (or is there going to be a difference between USA and UK with the different voltage?).
Posted on: 04 July 2006 by rocketboy
Congrats Markus...

I have installed dedicated power in two different locations I lived in. The first time the difference was MASSIVE... much like your experience. The second time, with a much more advanced system, was not nearly as noticeable which I chaulked up to the power not having been all that bad to start with.

In my new, temporary rental house, the plugs in my listening room are all on the same breaker from the downstairs subpanel, albeit 15 amp... and NOTHING else is plugged into them...!!!
Posted on: 04 July 2006 by dave simpson
Markus,

From NANA's website:

"System Setup - Should I purchase a power conditioner or surge suppressor for my Naim Audio system?
Many systems, in our experience, do not perform anywhere near the ultimate level of performance due to poor conditions regarding the system's electrical set-up. Surprisingly, just a few minutes of extra attention to the AC mains power for your system can unleash a great deal of extra music, at virtually no additional cost!

DEDICATED CIRCUIT
Do you have enough power to feed your system?

The power supplies of Naim Audio equipment are deisgned to be among the largest, noise-free and most stable in the industry. You should provide your system with the most power possible--excess electrical capacity is important to making a great sound.

It is ideal that the system have its own separate circuit and circuit breaker.

Your electrician should install a dedicated 15 A circuit, complete with new wire, directly to your system. One dual (2) socket hospital-grade outlet is all that is necessary.

The advantage of a dedicated circuit is that your system will not be sharing power directly with other appliances in your house on the same circuit. Tremendous distortion of the power wave may occur if the circuit shares power with a refrigerator or personal computer (or worse, a humidifier or heater). This can reduce the system's performance considerably.
NOTE: Unlike many systems that use vacuum tubes or class-A circuit topologies, your Naim system uses very little quiescent power. The constant power demand of a Naim system is very small when played at normal levels, this advantage reflected in the extended longevity of Naim Audio equipment.

Your Naim components will likely outlast other designs by a large margin!

Outlet Strips
Naim Audio North America strongly recommends, for use with our equipment, a dedicated outlet strip, without circuit breakers, switches, fuses, indicator lights or other passive components which will reduce a system's performance.

We recommend the following items:

CablePro Noisetrapper NANA 8-Outlet Power Strip ($349)
available from http://www.thecablepro.com Eight industrial-spec grade, high-copper-content brass outlets for better conductivity
Non-magnetic, aluminum-alloy chassis
Cascade parallel wiring for hot and neutral connections
Star-grounded to minimize noise
12-gauge silver-plated oxygen-free-copper wiring
Hardwired, shielded power cord



Brooks/Wiremold L10320 (6' cable, $55) / L10321 (15' cable, $65) Outlet Strip
available from your local Naim dealer Nine panel-mount brass outlets
Non-magnetic, aluminum-alloy chassis
Cascade parallel wiring for hot, neutral and ground connections
12-gauge copper wiring with crimp connections
6' or 15' stranded-copper power cord with molded plug



Sequencing
The order in which the components are plugged into the strip is critical. If you plug the power amplifier into the strip closest to the end where the strip power cord enters, and work your way back to the source component, you will get a much better sound. Here are some examples:

A simple system:

NAP 150x Power Amplifier
FLATCAP2x Power Supply for NAC 112x Preamplifier
CD5x Compact Disc Player
Other sources, turntable, etc., in any order

An SL2 active system:

NAP 250 Power Amplifier
NAP 250 Power Amplifier
HICAP2 Power Supply for SNAXO 242 Active Crossover
SUPERCAP2 Power Supply for NAC 282 Preamplifier
XPS2 Power Supply for CDX2 Compact Disc Player
In some cases, it may be preferable to plug the power amplifier directly into the wall socket.

Because of the advantage of being able to control the order in which the components are plugged in, using a dedicated outlet strip is far superior to plugging all system components directly into a quad or double quad receptacle. Here are a couple more tips:

Keep power wires separated from signal wires--do not bunch your power wires together, but keep them flowing as gracefully as possible (electricity does not flow effeciently around sharp corners and bends).
Use only the Naim Audio power cords as supplied--they easily outperform even the most expensive power cords, and certainly any average cord.
POWER CONDITIONERS
Our customers often inquire about the purchase of a power conditioner suitable for a Naim Audio system.

You absolutely do not need one--every power conditioner we know of reduces musical performance dramatically.

Do not be fooled--power conditioners will make your system worse in every case. (A few will make one area a little better while ruining fifty other areas--that is the best case we have seen!)

If the power is dirty, you can't improve it with a power conditioner without taking away some of the remaining quality and punch.

LIGHTNING
No power strip or conditioner can protect your system from lightning, your system's worst enemy.

Lightning raises the voltage on the ground side of the line, and can not be protected against--except by unplugging the system during a storm.

DISCLAIMER
We will not guarantee the performance of the system with any power conditioner, line conditioner or computer-grade outlet strip.

If you are not happy with your Naim system, please first try the recommended power setup described above. You should also refer to our SYSTEM SETUP GUIDE."



To answer an earlier question; yes, your new dedicated line should be connected to the main panel, NOT subpanels. This minimizes the number of connections keeping the AC as clean as possible. There is some debate about local regulations here in the US allowing for a 20 amp line to feed our Naim gear (15 amp devices) even though 15 amp devices (toasters, etc.) are perfectly acceptable with respect to National Code when plugged into small appliance (20 amp) circuits in modern residential kitchens. Regardless, I'd heed NANA's advice above and have my electrician install a dedicated 15 amp line. This way if you have a fire (God-forbid), your insurance adjuster cannot deny your claim based on a "misused" 20 amp circuit. It's simply not worth the risk.

BTW, any other questions regarding AC installations are best emailed directly to NANA. They are a wealth of information having studied the effects of AC with Naim gear for many years.

hth,

dave

NANA's website
Posted on: 04 July 2006 by u5227470736789439
A wicked thought from Fredrik!

It is said that a spur is preferable to a ring main, and in this respect I am still with the ring mian luddites, thought it hardly matters with weeks left on the tenancy, BUT I do wonder how much this is related to what else is plugged in and turned on?

If nothing or next to nothing is also attached to the main, then is there any real significance in this, provided the basic wiring is sound and up to modern standards?

I don't know the answer, so it is not an idle question. Someone wiser than me [Not that hard to imagine type of Smiley], must know the answer.

ATB from Fredrik
Posted on: 04 July 2006 by dave simpson
quote:
Originally posted by Fredrik_Fiske:
A wicked thought from Fredrik!

It is said that a spur is preferable to a ring main, and in this respect I am still with the ring mian luddites, thought it hardly matters with weeks left on the tenancy, BUT I do wonder how much this is related to what else is plugged in and turned on?

If nothing or next to nothing is also attached to the main, then is there any real significance in this, provided the basic wiring is sound and up to modern standards?

I don't know the answer, so it is not an idle question. Someone wiser than me [Not that hard to imagine type of Smiley], must know the answer.

ATB from Fredrik


No "ring main" wiring here in the US, Fredrik. Everything here is a spur of some sort with one or more electrical devices (outlets, switches).

regards,

dave
Posted on: 05 July 2006 by Keith L
Markus,

As Rocketboy has mentioned, not everyone will benefit from a dedicated supply. Mine goes directly to a 32a fuse via 6mm cable. Not a blind bit of difference in my circumstance. Is there a way of testing for noisy mains before going to the expense of installing a dedicated supply?

Keith
Posted on: 05 July 2006 by thejejk
Heh, too much mains talk apparently for our Adam...
Posted on: 05 July 2006 by andy c
Fredrik,

I did the spurs thingy some time back, and then kept nice and quiet whilst doing a series of auditions based on comparing the spurs to my ring main. If you have a fridge on your ring main it's using power. IMV there is almost always something using power off the ring main.

Anyway, I did 4 spurs v 1 spur into a hydra v the ring main into the same hydra. I still use the 4 spurs.

andy c!