essence specifications
ESSENCE SPECIFICATIONS
ZU AUDIO ESSENCE Mk.I [REV-A] LOUDSPEAKER SYSTEM SPECIFICATIONS + INFORMATION
Description
Essence is a high-efficiency, high-output, direct radiating floor standing loudspeaker. It features a full-range Zu
designed and built driver, full implementation of the Zu-Griewe loading technology with fixed gap, no crossover or filters
on full-range driver, complimented by a high output transformer coupled ribbon tweeter to provide the sparkle and
resolution from 12 kHz and up.
Production
January 2009—
Dimensions H x W x D
Weight
Packaged
Bandwidth
Efficiency
Impedance
Acoustic Center
Horizontal Listening Window
Vertical Listening Window
Recommended Listening Distance
Recommended Connector
Accepted Connectors Via Adapter
Internal Cabling
Power Recommendations
49 x 12 x 12 [125 x 30.5 x 30.5cm] // footprint is 12.5” [32cm] square
67 pounds [30kg] // may vary with finish selection
FlexPak foam encapsulated 54 x 17 x 17” [137 x 43 x 43cm] 75 pounds [34kg]
30—40,000Hz
97dB SPL @ 1W, 1m
12Ω, nominal full bandwidth
40” [101cm]
45˚
40˚
4 feet [1m] or more
1/4” fork spade [6.3mm] or oversized 5/16” [8mm] fork spade
the above plus bare wire (banana plugs in a pinch)
Zu Mission cable harness, pure copper, approximate conductor area is 13AWG per charge
2—8 watt (average room, moderate volume)
8—32 watt (large room, loud listening)
32—90 watt (large room, concert levels)
200 watt (maximum input power)
Amplification Considerations
all types, tubes and solid-state, anything that sounds good.
Component Tolerance
Tweeter Detail
High-Pass Detail
Full-range Driver Array Detail
drivers 1% pair matching, 0.01% on electrical components
1x TB-1855S-B ribbon, final foil adjustment and assembly by Zu // bandwidth: 12k—40kHz+
2nd order bessel @ 18kHz (12kHz acoustical) Kimber Kap 2uF + 2.0mH
1x Zu260FRD/G4/ESSENCE full-range driver // bandwidth: 30—12kHz (direct and unfiltered)
Cabinet
Spike / Feet Insert Thread
Included With Loudspeaker
Loudspeaker Options
Life Expectancy
Manufacturers Country Of Origin
Compliances of Directives
Warranty & Service
ZU AUDIO |
MDF / Baltic or Finish birch
3/8–16 TPI, 9/16” hex nut, 14mm wrench can be used
2x hard press-on full-range driver covers, installed
8x hard surface stainless ball-end feet / 8x stainless 9/16” [14mm] jam nuts, installed
8x long carpet spikes, 1x connector cleaning kit, 1x finish cleaning cloth, 1x instruction booklet
custom finish work
40 years; cabinet, and the Zu 10” drivers; 15 years on TB-1855S-B ribbon (foil will likely need replacement)
U.S.A. all parts and labor excluding the TB ribbon tweeter which is a product of Taiwan
RoHS | CE | WEEE
5 years limited on cabinet and drivers—warranty does not cover misuse, abuse, components upstream from the
loudspeaker system, modifications or non-factory service.
3 3 5 0 S . 1 5 0 0 W.
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O G D E N , U TA H
— U.S.A.
[DESIGNED AND MADE BY US]
WWW.ZUAUDIO.COM
ESSENCE SPECIFICATIONS
ZU AUDIO ESSENCE Mk.I [REV-A] LOUDSPEAKER SYSTEM SPECIFICATIONS + INFORMATION
HYPE AND SALES COPY
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Cover of Stereophile, October 2009
Exceptional Value Award —TONEAudio
Stereophile 2010 Recommended Components
Stereophile 2011 Recommended Components
“Zu Audio’s Essence speaker breaks almost every high-end design rule and sounds all the
better for it!” —Home Entertainment 2010
“The Zu Essence is a big speaker, with a really big sound, fully capable of rocking out like few
high-end speakers anywhere near its [] price can.” —Audiophiliac / CNET 2010
“In a hi-fi world largely populated by loudspeakers that stick pretty close to the marketplace
stereotype, it’s always interesting and challenging to come across something that is very
different and which quite deliberately flouts normal loudspeaker design conventions, such as
these Zu Essence loudspeaker.” —Hi-Fi Choice 2010 “ľľľľ”
“Of course, the midrange, which has always been a strong suit for Zu speakers, came through
with the dynamics and clarity that first caught my attention years ago, so pardon me if I don’t go
into much more detail than that. Overall, it is clear to me that this speaker system is a winner
and delivers the goods in a delightful, effective and fun way.” —Stereotimes 2010
“...the Zu Essence is the second greatest value you can buy today.” —6moons.com 2010
“The Zu Essence is not a hair-shirt product, in which regard alone it has surpassed at least
half the high-efficiency loudspeakers in the domestic marketplace. Inasmuch as it’s among the
more affordable choices—exponentially, in some cases—it has surpassed many of the rest. The
Essence is something of a milestone.”—Art Dudley, Stereophile 2009
“The Zu Essence speakers will transport you to an extremely enjoyable place that few speakers
can. I’d say the name is very appropriate.” —TONEAudio 2009
“This gets us to an inevitable while sobering conclusion: the Zu Essence gets squarely right
what many far more expensive speakers fail to even consider.” —6moons.com
Zu Essence is engineered from the ground up to set the standard for what is possible from an
affordable high fidelity loudspeaker that fits comfortably in mainstream homes and apartments.
And like all Zu products Essence is built around the critical human voice (A1, 55Hz, through
A6 and all the possible harmonics, to approximately 10kHz). Serving this critical region of tone
is Zu’s 4th generation 10” paper coned full-range driver which is specifically engineered for
the Essence platform. And to carry all the burnish and harmonic structure of instruments and
content, Zu integrates a sophisticated high efficiency ribbon tweeter.
ZU AUDIO
|
3 3 5 0 S . 1 5 0 0 W.
|
O G D E N , U TA H
— U.S.A.
[DESIGNED AND MADE BY US]
WWW.ZUAUDIO.COM
ESSENCE SPECIFICATIONS
ZU AUDIO ESSENCE Mk.I [REV-A] LOUDSPEAKER SYSTEM SPECIFICATIONS + INFORMATION
We started with the challenge to upgrade Druid, the original Zu loudspeaker
The research and development project that produced the Zu Essence loudspeaker began with
intent to create a “Super Druid” upgrade to the original Zu Druid loudspeaker and fill a price
gap between that speaker and our then pinnacle Definition model. Some Druid customers
challenged us to make a less fussy Druid (its adjustable floor-to-base gap tried the patience
of some) with more extended bass that would sound linear in a greater variety of rooms. They
asked for extended, more transparent top end and less directionality. Essentially, bargain
lovers wanted as much of what we offered in Definition at half the price or less, and without
Definition’s sonic scale so it would work in smaller rooms. Yet they wanted Druid’s simple form:
single full-range driver augmented by a single super tweeter in a crossoverless design, within
Zu’s trademark 12” x 12” footprint bearing a slim obelisk.
THIRD GENERATION ZU-GRIEWE ELECTROACOUSTICS LOADING
Zu Essence features Zu-Griewe technology, a driver/cabinet/room acoustic impedance
architecture. Fully incorporating Zu-Griewe acoustic technology into a Druid-style speaker
required us to abandon Druid’s distinctive monolithic form in favor of a full 12” x 12” column.
We eliminated the need to painstakingly adjust the base-to-floor air gap in Druid by mounting
Essence on a fixed-gap double plinth. The Zu full-range driver was reworked with a and
slightly stiffer, slightly heavier cone, with a completely redesigned phase plug for more linear
management of high frequencies and broader dispersion from the directly coupled to voice coil
inner cone. That left the question of what to do to improve the performance above 10kHz. So
far, these improvements over Druid came at only moderate increases in cost. We wanted this to
be an affordable loudspeaker that set a new benchmark in performance-per-dollar in high-end
audio loudspeakers, so the top-end improvements had to come on a budget. Enter TB. Ribbon
tweeters are fast, extended, revealing and capable of exquisite aural subtlety, but in the past
they’ve been expensive and difficult to successfully integrate with most cone speakers. But our
interest in the advantages of ribbon super tweeters goes back years and we’re plugged in to
new developments. When we were exploring alternatives for this last bit of the “Super Druid”
design, we discovered a new ribbon tweeter, which is excellent, value-priced and possessed
characteristics that made it a great candidate for seamless integration with the Zu full-range
driver. When we were done with the design, prototypes built, tested and listened to, we knew
we had something more than a Super Druid. We had in one speaker, smack in the middle of our
line, the very Essence of Zu.
Zu-Griewe technology was developed by Ron Griewe and Sean Casey, with its beginnings in competition two and fourcycle motorcycle engine exhaust systems for improving power output, with increased bandwidth, while reducing noise
and sound pressure levels over convention. More on the Zu-Griewe tech can be found in the FAQ section.
ZU AUDIO |
3 3 5 0 S . 1 5 0 0 W.
|
O G D E N , U TA H
— U.S.A.
[DESIGNED AND MADE BY US]
WWW.ZUAUDIO.COM
ESSENCE SPECIFICATIONS
ZU AUDIO ESSENCE Mk.I [REV-A] LOUDSPEAKER SYSTEM SPECIFICATIONS + INFORMATION
MORE SALES COPY
True tone, real bass and explosive dynamics for “HD” music reproduction on reasonable
budgets Essence has the tone purity that’s trademark of Druid’s simplicity, with none of
that speaker’s consciously-chosen limitations in scale nor its minor colorations accepted for
economic considerations. Essence will not deliver the ultimate scale and explosive power of
Definition, but its true 30 Hz bass extension and excellent horizontal dispersion make it as
useful for uncompromised home theater in HT 7.1, 5.1 or 2.0 systems as well as audiophile
stereo systems. Essence delivers inimitable intimacy for solo voice or violin, with the convincing
emotion only possible with our full-range driver’s extraordinary tone density, while jumping to
life for jazz, all forms of rock, blues, country, folk... or the challenging power of a full symphony
orchestra, still able to descend with pleasure to the dark and intimate side of all forms of
sincere music. Zu Essence will also bring the fully bombastic theater experience to dynamic
Blu-Ray soundtracks. And Essence will do all of this even with modest amplifiers.
In a market where many loudspeaker makers think nothing of charging you a hundred
Benjamins for speakers that have special strengths and glaring weaknesses, and that further
drain your wallet by requiring exclusively exotic, premium amplification, Zu puts true high-end
audio performance in your home for about a third that. And the amplifier-friendly impedance
of Essence along with its super power efficiency opens the whole wide world of amplification
to you. From a $100 eBay-sourced ‘70s classic Marantz receiver to a tweaker’s delight four
watts per channel triode tube amp, to the latest solid state behemoth, and anything in between,
Essence will sound good, get your feet tapping (occasionally your whole body) and take
maximum advantage of what you wire to them.
For music lovers of every technical era
Essence is simply complete in form and quality of sound. Order your pair of Essence today,
with full no questions asked 60 days return privilege. Pull the stuff you really listen to from
the depths of your CD, LP or download music collection, and let the Essence work its magic.
Essence is the speaker that will amaze and delight the most bleeding-edge computer audio
evangelist, vinyl bottle head vigilante and silver-disc bits-spinner equally. If you love music in
your own home, alive with all the passion the artist originally recorded, get Essence today.
“All of us at Zu are super excited about the Essence; it truly does embody all that we have been
reaching for these past years. It will convincingly playback everything we throw at it—the stuff
we love, from big power music like Wagner and Zakk Wylde, to the super complex, explosive
and phrased. It reveals all the sweet angelic yet spicy timbre of Bjork, and the blood and guts
emotion of Joe Strummer and Lucinda Williams, or the twisted and cold realities of Edward
Ka-Spel. Yeah, it does nuance, light ‘n shadow, and dynamic contrast like we have never heard
from anything remotely close to this size and price. There’s nothing hyped or Technicolored in
its playback either, what goes in is what comes out, be it raw, bombastic, animated, dirty, hi-fi ,
funk, ambient, or whatever. I dig this loudspeaker!” —Sean Casey, founder, Zu Audio
ZU AUDIO
|
3 3 5 0 S . 1 5 0 0 W.
|
O G D E N , U TA H
— U.S.A.
[DESIGNED AND MADE BY US]
WWW.ZUAUDIO.COM
ESSENCE SPECIFICATIONS
ZU AUDIO ESSENCE Mk.I [REV-A] LOUDSPEAKER SYSTEM SPECIFICATIONS + INFORMATION
ZU AUDIO |
3 3 5 0 S . 1 5 0 0 W.
|
O G D E N , U TA H
— U.S.A.
[DESIGNED AND MADE BY US]
WWW.ZUAUDIO.COM
ESSENCE SPECIFICATIONS
ZU AUDIO ESSENCE Mk.I [REV-A] LOUDSPEAKER SYSTEM SPECIFICATIONS + INFORMATION
ZU AUDIO
|
3 3 5 0 S . 1 5 0 0 W.
|
O G D E N , U TA H
— U.S.A.
[DESIGNED AND MADE BY US]
WWW.ZUAUDIO.COM
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