KV2 Audio ESR Series User manual

s ESR2800
s ESR212
The future of sound.
Made perfectly clear.
At KV2 Audio our vision is to constantly develop
technologies that eliminate distortion and
loss of information providing a true dynamic
representation of the source.
Our aim is to create audio products that absorb
you, place you within the performance and deliver
a listening experience beyond expectation.
ESR Series
User Guide

ESR series
Contents
3
ESR series
Introduction 4
ESR2800
Overview 5
Getting started 6
Features - Front panel 7
Features - Rear panel 8
Using the system - Full Range 9
Using the system - Subwoofers 10
Specications 11
Block diagram 12
ESR212
Overview 13
Technology 14
Specications 15
Frequency characteristics 16
ESR212 - Drawing 17
ESR2800, ESR212
Accessories 18
Contents

Thank you for purchasing this KV2 Audio, ESR series system, consisting of the ESR2800 stereo controller/ampli-
er unit, two ESR212 speakers and optional variants of subwoofers.
The ESR range has been developed for a particular niche in the market, where an all in one box is needed to
give clear detailed reproduction over a wide area. The ESR212 and 215 are three way full range enclosures with
wide dispersion characteristics. They can be used vertically for theatre, church or cultural centre type installati-
ons, or horizontally mounted to give excellent coverage over a tiered seating area for stadium or grandstand
type applications.
Similar to our popular ES range, the ESR cabinets are fully active and driven by a proprietary amplier, which
delivers equalized, and time aligned accurate signal to each of the components. Two ESR212 cabinets can be
driven by a single ESR2800 High Denition Amplier, which houses all signal processing and amplication,
as well as providing control for two dierent external subwoofer cabinet congurations if required.
In situations where extended bass response is not needed, but full range high denition audio reproduction
with extremely good coverage is required, the ESR Range oers an ideal solution. Economies of scale are
achieved by the requirement of only one ESR amplier, to run a three way active stereo system where other
systems would require processors and multiple ampliers to achieve a similar conguration.
This manual contains important information on operating the ESR system correctly and safely. Please take some
time and read this manual to familiarize yourself with the advanced features of this system.
The ESR2800 Amplier is a three-way, active control and amplication system, specically designed for the KV2
Audio ESR series loudspeaker systems. It houses all signal processing and amplication, as well as providing
control for external subwoofer cabinet congurations, and to operate additional subwoofer cabinets if needed.
External subwoofers are powered by the external subwoofer amplier (VHD3200).
The amplier compliment and conguration inside the ESR2800 Amplier is as follows:
High Frequency - 100-watt, Class AB, Push pull, Low intermodulation design.
Mid Frequency - 200-watt, Class AB, Push pull, Low intermodulation design.
Low Frequency - 1000-watt, High-eciency, Current-enhancing switch mode technology with Linear Active Filter.
In most cases it would be advisable to use a KV2 Audio Line driver (LD4) in addition at the mixer end, to ensure
that the line to the amplier is driven correctly and the signal integrity maintained.
Although this system is simple to operate, improper use can be dangerous. This is a very high-powered device
that can put out high voltages and sizeable currents. Always use safe operating techniques with the SL series
system.
FOR YOUR SAFETY, READ THE IMPORTANT PRECAUTIONS SECTION AS WELL AS THE INPUT, OUTPUT
AND POWER CONNECTION SECTIONS OF THIS MANUAL.
Warranty
Your ESR System is Warrantied against defects in material and workmanship. Please refer to your supplier for more
warranty details.
Service
WARNING! Electronic components, risk of SHOCK!
In the unlikely event that your product requires service, it must be returned to an authorized KV2 Audio distributor, service
centre or shipped directly to the factory.
All warranty and service repairs must be undertaken by qualied technical personnel.
If the unit/s need to be shipped back to the factory, we advise using the original packing to reduce the risk of damage in
transit.
Please contact your nearest KV2 Audio centre for service details. Distributors list can be found at www.kv2audio.com.
Introduction
4
ESR series
Introduction

KVV 987 176
KVV 987 083
KVV 987 084
VHD3200-250V
VHD3200-230V
VHD3200-115V
sThe amplier compliment inside
the ESR2800 Amplier is as follows:
- High Frequency - 100-watt,
Class AB, push pull,
low intermodulation design
- Mid Frequency - 200-watt,
Class AB, push pull,
low intermodulation design
- Bass - 1000-watt, high-eciency,
current-enhancing switch mode
technology with Linear Active
Filter
ESR2800 Amplier
Rack mounted
Amplier rack mounting
The ESR2800 Amplier will mount in
standard 19" rack systems. Integral
rear mounting rack ears are also
provided for additional support, do
not rely on xing and mounting the
amplier using just the front panel as
support. Use eight screws and
washers to mount the amplier to the
equipment rack rails. We recommend
using a shock mounted rack for
touring use to prolong the life of your
amplier.
Unpacking
Unpack the ESR2800 Amplier and
check for any damage. If you nd any
damage, notify your supplier immedi-
ately. Only the consignee may
institute a claim with the carrier for
damage incurred during shipping. Be
sure to save the carton and all
packing materials for the carrier's
inspection.
Should you ever need to ship the
unit, only use the original factory
packaging. If the shipping carton is
unavailable, contact your supplier to
obtain a replacement.
The ESR2800 Amplier carton should
contain:
t&43"NQMJöFSDPOUSPMVOJU
t5IJTVTFSHVJEF
t5XP1PXFS$POEFUBDIBCMFQPXFS
cables
Overview
Features
sThe ESR2800 Amplier is a
stereo, three-way, active control
and amplication system specical-
ly designed for the KV2 Audio ESR
Series - ESR212 The Ultimate Full
Range System
sHouses all signal processing and
amplication as well as providing
control for external subwoofer
cabinet congurations.
sExternal subwoofer is powered
by the external subwoofer amplier
(VHD3200).
ESR2800 - 250V part num. KVV 987 285
ESR2800 - 230V part num. KVV 987 283
ESR2800 - 115V part num. KVV 987 284
177 mm
431,8 mm
177 mm
481,4 mm
FRONT PANEL
REAR PANEL
THROUGHT OUT
SUB OUT
SUB OUT
THROUGHT OUT
MAIN
*/165
MAIN
*/165
18"
21"
46#4&561
SUBLEVEL
FULLRANGE
MONO
OFF
ON
OFF
ON
AC IN A AC IN B
WWW.KV2AUDIO.COM
DESIGNEDBY KV2 AUDIO
."/6'"$563&%*/5)&&6301&"/6/*0/
SERIALNUMBER
WARNING:
50&/463&1301&301&3"5*0/"--08".*/*.6.0'*/4
OFCLEARANCE FROM THIS SURFACE AND ADEQUATE VENTILATION.
TOREDUCE THE RISK OF ELECTRIC SHOCK DO NOT REMOVE THIS
1"/&-03"/:"55"$)&%$0.10/&/5/001&3"5034&37*$&%"#-&
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TORAIN OR MOISTURE.
ESR2800
AVIS:RISQUE DE CHOC ELECTRIQUE NE 1AS OUVRIR
8"3/*/(3*4,0'&-&$53*$4)0$,%0/0501&/
CAUTION
)*()70-5"(&%0/053&.07&5)*41"/&-
WARNING
POWERON /
THERMAL (AUTO RESET)
SIGNALPRESENT
LIMITER
ESR2800
ESR2800 is dedicated for use only
with ESR212 speakers
ESR212 - The Ultimate Full Range
System
For extended bass systems the
ESR2800 is equipped with inter-
nal crossovers.
You can use one, or a combination
of many active KV2 Audio Bass
Modules (EX Series), or you can use
any passive bass speakers with
proprietary amplier (VHD3200
with VHD / ES / ESD subwoofers)
ESR2800
Overview
5
VHD3200 - Sub Woofer Amplier
part num. KVV 987 247

Cooling
The ESR2800 Amplier has a comprehensive cooling system featuring chassis sealed PCB board mounting and shock
mounted, speed controlled fans. This means that the cooling system never drives air across PCB boards, connectors or
components, ensuring prolonged electronic component lifespan and minimizing maintenance cycles.
Air is drawn into the front of the amplifer by the two fans on the rear panel, this passes over the cooling fans of the heat
sinks and exhausts through the rear. If the heat sink gets too hot, its sensing circuit will open the output relay, discon-
necting the load.
It is important to have an adequate air supply at the front of the amplier, and enough space around the rear of the
amplier to allow the cooling air to escape. If the unit is rack mounted, do not use doors or covers on the rear of the rack,
the exhaust air must ow without restriction. If you are using racks with closed backs, use fans on the rear
rack panel to ensure an ample air supply.
NOTE: The lters at the top and bottom of the front panel must be kept clean and free of dust and dirt to allow full
operation-CHECK PERIODICALLY
AC Requirements
Two PowerCon cables are provided to connect the ESR2800 Amplier to a suitable AC power supplies. Each cable powers
each separate amplier channel for sucient current delivery.
The PowerCon is a connector without breaking capacity, i.e. the PowerCon should not be connected or disconnected
under load or while it is live. Always isolate your AC supply before disconnecting the PowerCon connector.
The ESR2800 amplier operates in either 115V, 230V or 250V modes. Although pre-congured at the factory, the unit's
operating voltage mode can be changed in the eld. Amplier power plug must remain readily operable.
Your amplier will be supplied preset to the voltage used in your area. The table below provides typical current draw
gures for the ESR2800 Amplier.
The receptacle must be connected to a fuse or circuit breaker. Connection to any other type of receptacle poses a shock
hazard and may violate local electrical codes.
Do not allow water or any foreign object to get inside the amlier. Do not put objects containing liquid on or near tne unit.
To reduce the risk of overheating the amplier, avoid exposing it to direct sunlight. Do not install the unit near heat-emit-
ting appliances, such as a room heater or stove. this amplier contains potentially hazardous voltages. Do not attempt to
disassemble the unit. The unit contains no user serviceable parts, repairs should be performed only by factory trained
service personnel.
Current draw of ESR2800 Amplier
Getting started
AC Input Current draw with amplier running at
Average Power (Each Channel)
Current draw with amplier running at
Peak Power (Each Channel)
250V 3.2A 5A
230V 3.5A 5.4A
115V 7A 11A
ESR2800
Getting started
6

Features
Front panel
1) AC Mains Switch
The
ESR2800 Amplier has a combination AC Main switch/circuit breaker on the front panel. If the switch shuts
o during normal use, push it back to the ON position once. If it will not stay on you should take the unit to
qualied service personnel to have it serviced.
2) LIMITER
Yellow LED, indicates that the audio limiter has been activated. This RMS limiter protects speakers against
overload.
3) SIGNAL PRESENT
Green LED indicates when audio signal is present at the amplier input.
3) POWER ON/ THERMAL (AUTO RESET)
Green LED indicates that the AC power is on. When red, it indicates that the thermal limit of the ESR2800
Amplier has been exceeded and the unit has shut down.
POWER ON /
THERMAL (AUTO RESET)
SIGNAL PRESENT
LIMITER
431 2
ESR2800
ESR2800
Features
7

Features
Rear panel
1) MAIN INPUT / TROUGHT OUT
This is the main system input balanced XLR connector with associated Through Signal Output connector for
sending unprocessed signal to other devices in a system.
2) SUB OUT
Balanced XLR output connector, used to connect additional subwoofer. Output is active even when FULL RANGE
switch is ON.
3) FULL RANGE
Switch, selects the amplier crossover setup, when ON full range signal is reproduced by ESR212 cabinets, when
OFF signal is by frequency band in conjunction with the subwoofer output setup.
4) SUB LEVEL
This is the level control for the External Sub output in the range -6 to +6 dB.
5) MONO
Switch, sets SUB OUT outputs summing SUB OUT outputs channel A and B together.
6) PowerCon Power Connectors
The ESR2800 Amplier uses two connectors per two channel. Each connector supplies one channel. They accept
standard PowerCon terminated AC Mains cables.
7) Fans
The cooling fans operate continuously while the amplier is on. An internal temperature sensor increases the
speed of the fans during high temperature conditions. Air enters through the front grille and exits through the
rear. Be sure to allow adequate air ow to the front of the rack in which the ESR2800 Amplier is mounted.
8) Speaker EP6 Connectors
Accepts a standard EP6 terminated loudspeaker cable for connecting up to a single ESR212 cabinet. We recom-
mend using 2.5mm/core cables.
8
6
5431 2
THROUGHT OUT
SUB OUT
SUB OUT
THROUGHT OUT
MAIN
INPUT
MAIN
INPUT
SUB LEVEL
FULL RANGE
MONO
OFF
ON
OFF
ON
AC IN A AC IN B
WWW.KV2AUDIO.COM
DESIGNED BY KV2 AUDIO
MANUFACTURED IN THE EUROPEAN UNION
SERIAL NUMBER
WARNING:
TO ENSURE PROPER OPERATION ALLOW A MINIMUM OF 6 INS.
OF CLEARANCE FROM THIS SURFACE AND ADEQUATE VENTILATION.
TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT REMOVE THIS
PANEL OR ANY ATTACHED COMPONENT. NO OPERATOR SERVICED ABLE
PARTS INSIDE. REFER SERVICING TO QUALIFIED PERSONNEL. TO REDUCE
THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS APPLIANCE
TO RAIN OR MOISTURE.
ESR2800
AVIS: RISQUE DE CHOC ELECTRIQUE NE PAS OUVRIR
WARNING: RISK OF ELECTRIC SHOCK DO NOT OPEN
CAUTION
HIGH VOLTAGE: DO NOT REMOVE THIS PANEL
WARNING
7
ESR2800
Features
8

Using the system
Full range setup
Set ESR2800 Amplier to FULL RANGE ON mode. ESR212 cabinets plays full range signal.
THROUGHT OUT
SUB OUT
SUB OUT
THROUGHT OUT
MAIN
INPUT
MAIN
INPUT
SUB LEVEL
FULL RANGE
MONO
OFF
ON
OFF
ON
AC IN A AC IN B
WWW.KV2AUDIO.COM
DESIGNED BY KV2 AUDIO
MANUFACTURED IN THE EUROPEAN UNION
SERIAL NUMBER
WARNI NG:
TO ENSURE PROPER OPERATION ALLOW A MINIMUM OF 6 INS.
OF CLEARANCE FROM THIS SURFACE AND ADEQUATE VENTILATION.
TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT REMOVE THIS
PANEL OR ANY ATTACHED COMPONENT. NO OPERATOR SERVICED ABLE
PARTS INSIDE. REFER SERVICING TO QUALIFIED PERSONNEL. TO REDUCE
THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS APPLIANCE
TO RAIN OR MOISTURE.
ESR2800
AVIS:RISQUE DE CHOC ELECTRIQUE NEPAS OUVRIR
WARNING:RISK OF ELECTRIC SHOCK DO NOT OPEN
CAUTION
HIGH VOLTAGE:DO NOT REMOVE THIS PANEL
WARNING
Main Signal
Input A
Main Signal
Input B
FULL RANGE
OFF
ON
Full Range
Output A
Full Range
Output B
ESR212
SPEAKER A
ESR2800
Using the system
9
ESR212
SPEAKER B

THROUGHT OUT
SUB OUT
SUB OUT
THROUGHT OUT
MAIN
INPUT
MAIN
INPUT
SUB LEVEL
FULL RANGE
MONO
OFF
ON
OFF
ON
AC IN A AC IN B
WWW.KV2AUDIO.COM
DESIGNED BY KV2 AUDIO
MANUFACTURED IN THE EUROPEAN UNION
SERIAL NUMBER
WARNI NG:
TO ENSURE PROPER OPERATION ALLOW A MINIMUM OF 6 INS.
OF CLEARANCE FROM THIS SURFACE AND ADEQUATE VENTILATION.
TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT REMOVE THIS
PANEL OR ANY ATTACHED COMPONENT. NO OPERATOR SERVICED ABLE
PARTS INSIDE. REFER SERVICING TO QUALIFIED PERSONNEL. TO REDUCE
THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS APPLIANCE
TO RAIN OR MOISTURE.
ESR2800
AVIS:RISQUE DE CHOC ELECTRIQUE NEPAS OUVRIR
WARNING:RISK OF ELECTRIC SHOCK DO NOT OPEN
CAUTION
HIGH VOLTAGE:DO NOT REMOVE THIS PANEL
WARNING
AVIS:RISQUE DE CHOC ELECTRIQUE NEPAS OUVRIR
WARNING:RISK OF ELECTRIC SHOCK DO NOT OPEN
CAUTION
HIGH VOLTAGE:DO NOT REMOVE THIS PANEL
WARNING
Main Signal
Input A
Main Signal
Input B
FULL RANGE
OFF
ON
AC IN AAC IN B
SERIAL NUMBER
WWW.KV2AUDIO.COM
DESIGNED BY KV2 AUDIO
MANUFACTURED IN THE EUROPEAN UNION
BRIDGE - INPUT A
INPUT A1600W / 4
BRIDGE
OUTPUT A
INPUT B
OFF
ON
3200W / 8
1600W / 4
OUTPUT B
Using the system
External subwoofer setup
Set ESR2800 Amplier to FULL RANGE OFF mode. Signal is crossed over at Hi/Mid for ESR212 cabinets
and SUB for external subwoofer.
SUB SET UP LEVEL setting depends on which subwoofer unit is used.
Mid/Hi
Output A
Mid/Hi
Output B
Sub
Output A
Sub
Output B
ESR2800
Using the system
10
ESR212 SPEAKER B
VHD4.18 VHD4.18
ESR212 SPEAKER A
VHD4.18 VHD4.18

Specications
Output Channels
Number of Channels 2 (stereo)
Total Output Power 2x 1300W
High Frequency Amplier Specication
Type Class AB - Push Pull - Low IM Design
Transformer balanced out
p
ut
Rated Continuous Power 100W
Distortion <0.02%
Operatin
g
Bandwidth 2,5kHz ÷ 40kHz
Mid Frequency Amplier Specication
Type Class AB - Push Pull - Low IM Design
Transformer balanced out
p
ut
Rated Continuous Power 200W
Distortion <0.02%
Operatin
g
Bandwidth 500Hz ÷ 2,5kHz
Low Frequency Amplier Specication
T
y
pe Hi
g
h ecienc
y
, Current-enhancin
g
switch mode
Rated Continuous Power 1000W
Distortion <0.02%
Operatin
g
Bandwidth 20Hz ÷ 500Hz
Signal Input
Input Sensitivit
y
1V RMS
Input Impedance 20kΩ (balanced)
Speaker Output
Speaker Output 2x EP6
Power
Power Connector 2x Neutrik PowerCon®
Operatin
g
Volta
g
e115V / 230V / 250V
Operatin
g
Volta
g
e Ran
g
e100÷120V@60Hz
|
205÷240V@50Hz
|
225÷260V@50Hz
Recommended Ampera
g
e2x10A 115V
|
2x5A 230V
|
2x5A 250V
Physical Dimensions
Hei
g
ht 177.8mm (7.0"), 4RU
Width 483mm (19.0")
Depth 495mm (19.5")
Wei
g
ht 36k
g
(79.37lbs)
ESR2800
Specications
11

Block diagram
FULL RANGE
OFF ON
MONO
OFF ON
MAIN
INPUT
MAIN
AC IN
THROUGH
SIGNAL OUT
CONTROL
PRE, EQ
SUB OUT
PROTECTION
POWER SUPPLY
SIGNAL
MANAGEMENT
CONTROL
UNIT
HI 2,5 kHz - 40 kHz 100 W
OUTPUT
MIDHI 400 Hz - 2,5 kHz 200 W MIDLOW 10 Hz - 400 Hz 1000 W
EXT SUB LEVEL
± 6 dB
SIGNAL
PRESENT LIMITER
POWER ON
THERMAL / AUTO RESET
CONTROL
SUB
SUB - CHANNEL B
ESR2800 block diagram
Channel A, channel B is identical
ESR2800
Block diagram
12

Overview
ESR212
Overview
13
Requires ESR2800 unit for control
electronics and amplication.
KVV 987 285
KVV 987 283
KVV 987 284
ESR2800-250V
ESR2800-230V
ESR2800-115V
ESR212
The Ultimate Full Range System
part num. KVV 987 247
ESR Full Range Sound System
Benefits
Total flexibility
ESR Series does not require a large
number of speakers. Provides a full
range, very high quality sound from
single, small, location. For extended
bass use from a wide range of
subwoofers. Subwoofers can be
placed in a large place range, becau-
se of 70Hz crossover point between
ESR module and subwoofer.
Superb sound
Greater dynamic range than any
current active design. Features Very
High Denition technology with
Super Analog amplier.
Easy set-up
Plug-and-play connection to ESR2800
amp/processor module.
Cabinet features top handles,
seven suspension points and
“integral feet” for easy positioning on
stage.
Description
The ESR212 is a dedicated Full Range
System.
Incorporating Patent Pending-Propri-
etory components, specically
matched to bespoke electronics.
Exceptionally at frequency response
and Very High Defnition sound
system. Emphasizes every detail and
nuance of a performance and
transfers the atmosphere to each and
every audience member.
ESR212 Applications
sVery high quality xed installations
sProfessional portable PA Systems
for large format AV, speech and
multimedia playback
sLive music applications
sProfessional DJ loudspeaker
systems
sClassical music amplication and
reproduction
sAudiophile, very high quality
system
sHigh quality studio monitoring
s Front-loaded, twelve-inch
mid-bass driver with 3.00”
(76mm) voice coil assembly and
neodymium magnetic motor
structure
s Professional, exterior-grade
Baltic birch construction with
wear-resistant polymer coating
Proprietary corner and side
handle designs for simplified
handling and carrying
s Acetal copolymer high
impact, low friction feet are
asymmetrically located on three
sides allowing vertical or
horizontal system set up, lock-in
and easy cabinet movement
s Six internal corner and one
back brace with M10 suspension
points.
A total of 15 suspension points
are available for custom installa-
tion applications
s Requires ESR2800 unit for
control electronics and ampli-
cation
Features
s High-output, full-range 3-way
loudspeaker system
s 128dB sustained output
s Wide dispersion at high
frequencies, controlled at low-
mids to reduce indoor reections
s Mid/High horn design provides
optimized transducer loading
and controlled dispersion
s Patent-Pending 1.75”
diaphragm nitride-titanium
compression driver with complex
geometry phase plug for higher
output and lower distortion
performance and neodymium
s Six-inch midrange driver with
1.75” (44mm) neodymium
magnetic motor structure for
increased control and output and
decreased distortion and weight
s Proprietary midrange heat
dissipation system controls voice
coil temperature, ensures high
dynamics and extends transducer
lifespan
FULL RANGE MODULE

ESR212 rear panel (cable connection to ESR2800 unit Amplifier/Controller)
Technology
ESR212
Technology
14
Exclusive KV2 rotatable horn
design for maximum exibility
The ESR212 features a mid/high
integrated horn design with a
number of unique features. First, the
horn can be rotated 90˚, allowing
for complete exibility in selection
of vertical, horizontal system set up.
The horn design is based on
constant-directivity geometry with
an emphasis on maintaining low
transducer compression ratios, high
output and wide dispersion (90˚ x
40˚). The midrange speaker is xed
to a large aluminum heat sink which
is attached to a precisely designed
midrange “chamber”. The combina-
tion provides optimal cone loading
and heat dissipation. Further
loading and dispersion is controlled
through a 2.28” (58mm) precision
phase plug.
Heat-resistant midrange
Midrange frequencies between
500Hz and 2.5kHz are reproduced
by a six-inch midrange speaker that
provides 106 dB of sensitivity
(1 watt / 1 meter) when coupled
with the integrated horn. The
magnetic motor assembly features a
high temperature 1.75” (44mm)
diameter voice coil assembly and
extensive use of neodymium.
Because of the limited linear
movement of most midrange
transducers - usually 2-3mm -
ventilation of the voice coil assemb-
ly and magnetic structure is poor
and failure rate from heat fatigue is
high. The ESR212 midrange dissipa-
tes heat passively through the use
of a massive aluminum heat sink.
When combined with the ESR2800
unit control electronics, the system
provides high output levels safely
and consistently over innite
periods of time and dramatically
reducing heat associated transducer
problems such as power compressi-
on and decreased dynamics.
Neodymium bass transducer
The ESR212 features a
twelve-inch neodymium bass
speaker with front loaded bass
reex design. It is important to note
that neodymium is not a transducer
panacea, as it cannot safely operate
at the same typical operating
temperatures ferrite does. Using
neodymium requires a profound
understanding of material science
and nite element analysis to
properly design a stable, high force
magnetic structure that functions
correctly. 18 Sound and KV2 audio
engineering jointly designed the
twelve-inch mid bass driver for the
ESR212.
The ESR212 bass transducer
reproduces frequencies from 38Hz
to 500Hz. The bass transducer is
very precise and fast with high
sensitivity. The high eciency
neodymium motor provides an
extraordinary amount of force that
delivers complete control of the
cone mass and a high overall
weight loss.
Easy to set up
The ESR212 is an aesthetically
pleasing - looking enclosure
featuring a number of ergonomical-
ly designed components that make
it a light, small, and easy speaker to
set up and use.
ESR212 features the two top
handles for pick up and reposition.
There are six industrial grade,
internal braces placed at each
corner and one internal brace on
the back. Corner braces are held in
places by two M10 bolts, the back
brace is held by two M6 and one
M10, providing a wide range of
installation and suspension exibili-
ty.
The ESR212 is a 3-way high output,
active-driven, full range Loudspea-
ker module. It is designed as part of
a sound reinforcement speaker
system that includes the ESR2800
system control and amplication
system.
The ESR212 Loudspeaker
system benets from being
designed exclusively to operate
above 40 Hz. By optimizing the ideal
operating band pass of each system
component, the ESR212 can achieve
extremely high output levels
consistently and safely.
Active-driven by the ESR2800 unit
Power, electronic crossovers,
phase alignment, equalization, time
correction and speaker protection
are provided within the ESR2800
unit.
This “one plug in, one-plug-out”
system ensures fast, easy set up and
complete control. It gives you the
benets of active sound reinforce-
ment technology, yet locates the
electronics in an easy-access
rackmount module.
Together, the ESR212 and
ESR2800 unit deliver the highest
dynamic range of any system
currently available, providing new
levels of clarity, depth and resoluti-
on.
Advanced compression driver
KV2 Audio’s transducer partner,
18 Sound in Cavriago, Italy, manu-
factures and co-develops all ESR212
components. The compression
driver is a 1.75-inch nitride-titanium
diaphragm design, featuring a
complex geometry phase plug that
dramatically lowers distortion,
eliminates ring modes and provides
clearer, ripple free performance.

Specications
ESR212
Specications
15
System Acoustic Perfomance
Max SPL Lon
g
-term 128dB
Max SPL Peak 131dB
-3dB Res
p
onse 38Hz ÷ 22kHz
-10dB Res
p
onse 28Hz ÷ 28kHz
Crossover Point 500Hz, 2.5kHz
High Frequency Section
Acoustic Desi
g
n Horn Loaded
Hi
g
h Horn Covera
g
e Horizontal / Vertical 90° x 40°
Rotatable Horn YES
Sensitivit
y
109dB
Hi
g
h Fre
q
uenc
y
Am
p
lier Re
q
uirement 100W from ESR2800 Am
p
lier
Throat Exit Diameter / Dia
p
hra
g
m Size 1" / 1.75"
Dia
p
hra
g
m Material NVPD Treated Titanium
Ma
g
net T
yp
eNeod
y
mium
Mid Range Section
Acoustic Desi
g
n Horn Loaded
Mid Horn Covera
g
e Horizontal / Vertical 90° x 40°
Rotatable Horn YES
Sensitivit
y
106dB
Midran
g
e Am
p
lier Re
q
uirement 200W from ESR2800 Am
p
lier
Woofer Size / Voice Coil Diameter / Desi
g
n6"/1.75"
Dia
p
hra
g
m Material E
p
ox
y
Reinforced Cellulose
Ma
g
net T
yp
eNeod
y
mium
Low Frequency Section
Acoustic Desi
g
n Front Loaded, Bass Reex
Sensitivit
y
98dB
Subwoofer Am
p
lier Re
q
uirement 1000W from ESR2800 Am
p
lier
Number of Drivers 2
Woofer Size / Voice Coil Diameter / Desi
g
n 2 x 12" / 3" / Inside Outside
Dia
p
hra
g
m Material E
p
ox
y
Reinforced Cellulose
Ma
g
net T
yp
eNeod
y
mium
Speaker Input
S
p
eaker In
p
ut Am
p
henol AP-6 Male
Speaker Output
S
p
eaker Out
p
ut -
Cabinet
Cabinet Material Baltic birch
Handles 2
Color "Oran
g
e
p
eeled" Matt Black or an
y
RAL
Physical Dimensions
Hei
g
ht 1126mm (44.33")
Width 447mm (17.6")
De
p
th 444mm (17.48")
Wei
g
ht 42k
g
(92.6lbs)

Frequency characteristics
ESR212
Frequency characteristics
16
Vertical Polarplots
Horizontal Polarplots
50 Hz - 200 Hz, 6 dB/div 500 Hz - 2 kHz, 6 dB/div 4 kHz - 16 kHz, 6 dB/div
Frequency response
50 Hz
100 Hz
200 Hz
500Hz
1kHz
2 kHz
4 kHz
8 kHz
16 kHz
0°
-30°
-60°
-90°
-120°
-150°
-180°
150°
120°
90°
60°
30°
0°
-30°
-60°
-90°
-120°
-150°
-180°
150°
120°
90°
60°
30°
0°
-30°
-60°
-90°
-120°
-150°
-180°
150°
120°
90°
60°
30°
50 Hz
100 Hz
200 Hz
500Hz
1kHz
2 kHz
4 kHz
8 kHz
16 kHz
90°
60°
30°
0°
-30°
-60°
-90°
-120°
-150°
-180°
150°
120°
90°
60°
30°
0°
-30°
-60°
-90°
-120°
-150°
-180°
150°
120°
90°
60°
30°
0°
-30°
-60°
-90°
-120°
-150°
-180°
150°
120°

Drawing
ESR212
Drawing
17
The three-way, mid / high loudspea-
ker system shall incorporate two
12-inch mid-bass (MB) transducer a
6-inch mid range (MR) speaker and
a 1-inch exit compression driver
high frequency (HF) transducer. The
LF drivers shall be mounted above
and below mid / hi horn tuned for
optimum mid-bass response and
dispersion. The HF and MR transdu-
cers shall be loaded on a rotatable,
integrated, constant directivity
mid/high horn assembly.
The system has a nominal coverage
pattern of 90° (horizontal) x 40°
(vertical). The loudspeaker enclosu-
re shall have a rectangular shape
and shall incorporate, two top
handles. Enclosure incorporates
M10 suspension points, three M10
suspension points on the top, three
M10 on the bottom and one M10
suspension point on the back. The
speaker cabinet shall be nished
with an ultra wear resistant black
polymer coating and tted with a
weather resistant perforated steel
grill. The system shall receive power
from a separate ESR2800 Amplifer.
ESR2800 Amplier - Controller
module consisting of separate
power ampliers for high, midran-
ge and midbass transducers as
well as signal processing including
electronic band pass crossover
lters, phase alignment, time
correction, equalization and
speaker protection. The speaker
system shall connect to the
Amplier/Controller Module via
proprietary cables terminated in
Amphenol AP-6 connectors. The
three-way mid / high loudspeaker
system shall be the KV2 Audio
ESR212.
ESR212 Architects and Engineer’s
Specications

ESR Series - Accessories
ESR212
Accessories
18
Amphenol AP6 cable-mount
female connector
part name: AP-6-11
part number: KVV 987 050
Amphenol AP6 cable-mount
male connector
part name: AP-6-12
part number: KVV 987 051
ES Cable kit
part name: CABLE-KIT
part number: KVV 987 047
The ES Cable Pack consist of four
high-quality Amphenol AP cable
assemblies designed for use with ES
Series.
- 2 pcs LF15
- 1pc LF40
- 1pc MH60
ES Mid/Hi speaker cable MH15,
AP6 connectors - 1,5m
part name: MH15
part number: KVV 987 147
- 1,5m (5ft), Mid/Hi Module hook-up
ES Mid/Hi speaker cable MH60,
AP6 connectors - 6m
part name: MH60
part number: KVV 987 125
- 6m (20ft), Mid/Hi Module hook-up
ES Mid/Hi speaker cable MH120,
AP6 connectors - 12m
part name: MH120
part number: KVV 987 126
- 12m (40ft), Mid/Hi Module hook-up
ES Mid/Hi speaker cable MH180,
AP6 connectors - 18m
part name: MH180
part number: KVV 987 127
- 18m (60ft), Mid/Hi Module hook-up
Vertical bracket for ESR212
part name: Vertical Bracket ESR212
part number: KVV 987 291
- 3 pcs M10x35 included
Horizontal bracket for ESR212
part name: Horizontal Bracket ESR212
part number: KVV 987 304
- 2 pcs M10x30 included

The future of sound.
Made perfectly clear.
KV2 Audio, Nádražní 936, 399 01 Milevsko, Czech Republic
Tel. [phone]
www.kv2audio.com
KVV120082-00-01-0
At KV2 Audio our vision is to constantly develop
technologies that eliminate distortion and
loss of information providing a true dynamic
representation of the source.
Our aim is to create audio products that absorb
you, place you within the performance and deliver
a listening experience beyond expectation.