Now also available with a 240 volt to 120 volt conversion transformer to allow your US products to work overseas in 240 volt areas.
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Other sale items are here: https://www.underwoodhifi.com/december-sale-95420207543
Get a $400.00 Gold power cord for $99.00 with purchase
Add 6 of our $60.00 copper duplexes for only $149.00 during this sale In the Sept 2020 Equi=Core 1800MK2 review in Positive Feedback they say:
"So how does the performance of the Equi=Core stack up?
To be frank, it is a giant killer." "Making the switch to the Equi=Core removed that noise, and this alone left me
quiet satisfied. As I listened to the system with the Equi=Core I also
noticed a slightly more relaxed top end and more bass definition from my
amplifier. I have found that tube amplifiers in particular really loved
the Equi=Core 1800 MK2."
"The Equi=Core 1800 MK2 was extremely effective at killing transformer hum
and vibration. The result was an inkier black background and more
separation between instruments and artists." "When I compared the Equi=Core to my PS Audio Power Plant P12 I found
that the systems sounded incredibly similar, however, the PS Audio Power
Plant P12 actually caused more transformer hum in my tube amplifiers.
When you consider that the retail price of the P12 is double the cost of
the Equi=Core, and that the P12 is only a 10 amp unit, it paints the
Equi=Core's value proposition in an incredibly good light, and makes it
easy to recommend."Read the entire review at:
The new Equi=Core 1800 MK2 is a full 15 amp, 1800 watt,
balanced line conditioner. It replaces the original 1800 that received many
exceptional reviews. It supports either 8 or 12 products thru its standard 4 or
optional 6 Hubbell style Duplex A/C
receptacles. It also offers surge protection in addition to sonics that
typically sell for $3000-$5000.00 from the competition. This new MK2 unit uses
a state of the art balanced transformer which adds electrostatic shielding to
the original to eliminate AC noise without the downsides of normal filtering.
All units use series wiring and upgraded internal wire over the original 1800.
The new MK2 is now 17" wide to accommodate up to 6 duplexes, although 4
In the 2017 Tone
Audio review they said:
"I could wax poetic about this track and that, but a
power product either does what it is supposed to or it doesn’t. The Equi=Core
1200 and 1800 conditioners deliver the goods and offer outstanding value for
the price asked. They are all made by hand in the Core Power factory in
And for those seeking additional value, they’ve got an
awfully good “premium” power cord that can be bundled for only $99. The
Shunyata Venom used to be my budget go to power cord, but this one easily takes
it’s place. Even if you think you have “clean power,” you’ll be surprised at
what one of these do for the overall sound quality of your system. It’s about a
10-minute demo. Plug it in, listen to your three favorite tracks, then take it
out and repeat. This is an easy one, folks. So what are you waiting for? Give
them a call (770-667-5633), they love to chat with their customers."
Read the entire review at:
It is now 5.5"
high and 17.2" wide x 14.6" deep and weighs 54 pounds.
Customers have all been blown away by the 1800. It compares
to the best conditioners at a fraction of their cost. See the reviews on the
smaller units in our other Core Power ad. All are exceptional.
Eliminate noise and hum in your system through the clever
use of “Common Mode Rejection” CMR technology
in small recording studios and high-end audio installations
interference by Common Mode Rejection
Increases S/N Ratio
by over -15 dB
True Balanced 120v
or 230V Power
Removes Power Line
Loops in House Wiring
Fields from Power Cords
Protects Equipment From Turn-On Surges
Interference Between Equipment
Made in the USA
17.2" w x
5.5" h x 14.6" d
Note: We have an option of our $60.00 upgraded pure Red
Copper Hubbell type Duplexes for $149.00 for all 4 or $188.00 if you get the
unit with 6. These replace the bronze Hubbell's used in the standard model.
Call us at 770-667-5633 to discuss these state of the art line conditioners
as well as the Deep=Core 1800 that is NOW shipping.
Our new $2,799.00 20-amp unit, the Equi=Core 2400 is
shipping now. Our sale price is $1,799.00 delivered with a $450.00 20-amp Gold
Buy with confidence from AudiogoN’s #1 rated dealer by
We accept PayPal, Visa, Discover, AMEX, MasterCard and money
Call me at 770-667-5633 to discuss these superb line
GA & HI residents add sales tax.
What is Balanced Power?
In much the same way that balanced audio lines can eliminate
hum, electromagnetic interference (EMI), and noise, the use of balanced AC power
lines in sensitive audio, video, or computer installations can make an enormous
difference in system noise and signal integrity. But power distribution in
North America, unfortunately, is not balanced. The distribution standards
currently in use were derived from practices established over a century ago,
when electric power use was limited to lighting and motors —long before any AC
noise sensitive applications existed. The emphasis then was on convenience
(from the power utilities standpoint) and safety, but not noise cancellation.
Balanced power is not a new design or approach in power
conditioning, however up till now its been very expensive because only small
group of manufacturer’s specialize in selling Balanced Power. It’s a rather
simple concept; in your home, the AC wall socket that you normally use has
three conductors: hot, neutral, and ground. Normally, if you measure the hot to
ground you should get 120 volts, and if you measure the neutral to ground you
should get 0 volts, but more often than you would imagine this is not what
happens, i.e., hot vs. ground might be far less than 120 volts, and neutral vs.
ground might be far more than 2 or 3 volts. These offsets produce common mode AC
line noise that becomes audible in your audio system.
In a balanced AC circuit, hot vs. ground, and neutral vs.
ground will both read 60 volts. In other words, the hot and neutral conductors
are both at 60 volts. Since these voltages are of opposite polarity though, and given that most interference in a
typical AC line is common between the two lines, the noise in the lines is
eliminated when the two lines are added together. This is effectively known as
Common Mode Rejection (CMR).
Brands carried: Ampsandsound tube electronics, Audio
Alchemy, Audio GD electronics, Audio GE Teddy speakers, Black Ice Audio tube
electronics, Bluesound music streaming products, Bob Carver tube amplifiers, Burson Audio, Core Power Technologies
A/V line conditioning and cables, DSPeaker room correction, Earmen portable
electronics, EAT Turntables, Emerald Physics speakers & amplifiers, Focal headphones,
HifiMan headphones, LSA speakers, headphones, turntables and electronics,
Marantz Reference, Martin Logan speakers & subwoofers, Melco servers, Music
Hall turntables, Ortofon cartridges, Peachtree Audio, Project turntables, Pure
Audio Labs DAC's, Quad speakers, headphones and electronics, Raal headphones,
Silverline Audio speakers, SPL electronics, Sumiko cartridges, Wireworld
& Wywires cables, Zesto Audio tube electronics
Sales policies on the Underwood Hifi Inc. website at