KV2 Audio ESR2800D User manual

User Guide
ESR2800D
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 expectations.

ESR2800D · Important Safety Instructions
ESR2800D Amplier · Important Safety Instructions
Important Safety Instructions
Before using your ESR2800D Amplier, be sure to carefully read the applicable items of these operating instructions
and the safety suggestions.
1. Read all product instructions.
2. Keep printed instructions, do not throw away.
3. Respect and rewiew all warnings.
4. Follow all instructions.
5. Do not use this unit near water, in unprotected out door areas or in rain or wet conditions.
6. Clean only with dry cloth.
7. Do not block any ventilation openings.
8. Install in accordance with KV2 Audio's recommended installation instructions.
9. Do not install near any heat sources such as heat radiators, heat registers, stoves or other apparatus that produce heat.
10. Do not defeat the safety purpose of the grounding type plug. A grounding type plug has two blades and a third
grounding connector. The third connector is provided for your safety. If the provided plug does not t into your outlet,
consult an electrician for replacement of the obsolete outlet.
11. Protect the power cord from being walked on or pinched, particularly at plugs, convenience receptacles.
The AC mains plug or appliance coupler shall remain readily accessible for operation.
12. Only use accessories specied by KV2 Audio.
13. Unplug this Amplier during lightning storms or when unused for long periods of time.
14. Refer all servicing to qualied service personnel. Servicing is required when the Amplier has been damaged in any
way, such as when the power-supply cord or plug has been damaged; liquid has been spilled or objects have fallen
into the Vents; rain or moisture has entered the Amplier; the Amplier has been dropped; or when for undetermined
reasons the Amplier does not operate normally.
15. Do not remove front or back panels. Removal of the panel will expose hazardous voltages.
There are no user serviceable parts inside and removable may void the warranty.
16. An experienced user shall always supervise this professional audio equipment.
CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE THE PANELS.
NO USER-SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED PERSONNEL.
WARNING: To prevent re or electric shock, do not expose this equipment to rain or moisture.
SAFETY SUMMARY
To reduce the risk of electric shock, disconnect the Amplier from the AC mains before installing audio cable.
Reconnect the power cord only after making all signal connections. Connect the Amplier to a two pole, three- wire
grounding mains receptacle. 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 Amplier. Do not put objects containing liquid on or near the unit. To reduce the risk of overheating the Amplier,
avoid exposing it to direct sunlight. Do not install the unit near heat-emitting 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.

ESR2800D · Contents
ESR2800D · Contents
Contents
Introduction 3
Introduction / Dimensions 3
Getting Started 4 - 5
Unpacking / Amplier rack mounting / Cooling 4
AC Requirements 5
Front Panel 6
Rear Panel 7 - 8
Display menu description 9
Web-server 10
Remote management 11 - 14
Overview 11
Channels 12
Diagnostics 13
Settings 14
Specications 15
Using the System 16 - 17
Full range setup 16
External subwoofer setup 17
Block Diagram 18
Warranty · Service 19
Notes 20

3
ESR2800D · Introduction
ESR2800D · Introduction
Introduction
The ESR2800D is three-way, active control and amplication system specially designed for the KV2 Audio ESR full range
series loudspeaker systems. It houses all signal processing and amplication, as well as providing control and crossover
function for an external subwoofer cabinet if needed utilizing an external amplier. The ESR2800D powers the ESR212. Each
unit incorporates six ampliers consisting of two 100-watt, Class AB, push pull, low intermodulation amplier for high
frequencies, two 200-watt, Class AB, push pull, low intermodulation design for mids and two 1000-watt, high-eciency,
current- enhancing switch mode technology ampliers for bass. The ESR2800D stereo conguration powers two ESR
cabinets accordingly.
ESR2800D - part number KVV 987 459 (250V)
KVV 987 458 (230V)
KVV 987 457 (115V)
Front Panel:
Rear Panel: Side Panel:
Application
Specically designed as the amplication and control
elements for the ESR212 loudspeaker system in a 4RU
mount module
• Fixed Installations
• Music venues
• Classical and opera concerts
Features
The amplier compliment inside the ESR2800D Amplier is as follows:
• High Frequency - 2x 100-watt, Class AB, push pull, low intermodulation design
• Mid Frequency - 2x 200-watt, Class AB, push pull, low intermodulation design
• Low Frequency - 2x 1000-watt, high-eciency, current-enhancing switch mode

4
ESR2800D · Getting Started
ESR2800D · Getting Started
Unpacking
Unpack the ESR2800D Amplier and check for any damage. If you nd any damage, notify your supplier immediately. 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 ESR2800D Amplier carton should contain:
• ESR2800DAmpliercontrolunit
• Thisuserguide
• TwoPowerCondetachablepowercables
Amplier rack mounting
The ESR2800D Amplier is 4 rack units in height and 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.
Cooling
The ESR2800D 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, disconnecting 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.
IMPORTANT! Please note that for correct full performance of the unit AND ANY WARRANTY COVER,
it is important that regular maintenance of the front vents and lters as well as the rear panel fans be inspected
and cleaned by removing any dust and debris build-up. Any product failure due to lack of attention in this matter will
immediately void any current warranty. (Please refer to notes re ventilation procedures).

5
ESR2800D · Getting Started
ESR2800D · Getting Started
AC Requirements
Two PowerCon cables are provided to connect the ESR2800D Amplier to a suitable AC power supplies. Each cable powers
each separate amplier channel for sucient current delivery.
THE ESR2800D REQUIRES A GROUND CONNECTION. ALWAYS USE A GROUNDED OUTLET AND PLUG.
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 ESR2800D 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 ESR2800D 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 ampli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-emitting 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.
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
Current draw of ESR2800D Amplier

ESR2800D · Features · Front panel
Front Panel
1) AC Mains Switch
The ESR2800D has combination AC mains switch/circuit breakers on the front panel. If either of the switches shut 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) Power / Thermal
These are dual colour LED's. When green they indicate that the Power Switch is ON and that channel of the amplier is
powered up. When red they indicate that that channel has overheated and shut down. The unit will Auto Reset after it cools
down to a safe operating temperature.
3) Signal / Speaker Protection
Indicator These are dual colour LED's. When green they indicate that signal is present at the Input to that particular channel
of the amplier. When yellow they indicate that the audio speaker protection limiter has been activated for that particular
channel of the amplier.
4) Display
Shows the set parameters and allows settings of various functions in the menu.
5) Rotation encoder with Enter push-button
The encoder serves as the main way for increasing (clockwise), or decreasing (counter clockwise) values and menu positions.
The encoder also serves as the ENTER (PUSH) button, allowing the operator to enter/leave the submenu in the main menu.
4 2 31 5
6
ESR2800D · Features · Front panel

ESR2800D · Features · Rear panel
Rear Panel
1) Main Input / Through Out
These are the input XLR connectors for channel A & B with associated 'Through Output' connectors for sending signal
to other devices.
2) Sub out Balanced XLR output connector
Sub out Balanced XLR output connector, crossed over LPF, used to connect additional subwoofers. This output is still active
even when FULL RANGE mode is activated.
3) PowerCon Power Connector
The ESR2800D Amplier uses two connectors per two channel. Each connector supplies one channel. They accept standard
PowerCon terminated AC Mains cables.
4) Fans
The cooling fans operate continuously while the ESR2800D 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 ESR2800D is mounted.
12 3 4
7
ESR2800D · Features · Rear panel

ESR2800D · Features · Rear panel
Rear Panel
Communication
5) Reset
Serves as factory reset button. Resets all setup, including network settings (default settings AutoIP/DHCP). Use a tool with
maximal diameter 2mm.
6) Status
LEDs indicates amplier and amplier diagnostics status, these are:
AMP
Dual colour LED. When green, it indicates that the power amplier is powered up and all monitored parameters are OK.
When red, it indicates that amplier is o, or some problem with the amplier has occured, more information can be
obtained via Ethernet.
POE
When green, it indicates that the diagnostics unit is powered via Power over Ethernet device.
DHCP
When green, it indicates that the diagnostics Ethernet IP address is assigned from the DHCP server.
7) Ethernet connector
Serves as a external communication port supporting Ethernet standard, accepts RJ45, T-658B wiring. The ESR2800D provides
web-server and SNMP (Simple network management protocol). When the Ethernet cable is connected and devices successfully
establish a connection, the green LED is activated. When Ethernet communication is in progress, the orange LED ashes.
8) Speaker AP6 Connectors
Accepts a standard AP6 terminated loudspeaker cable for connecting up to a single ESR212 cabinet. We recommend using
2.5mm/core cables
8
ESR2800D · Features · Rear panel
5 6 7 8

ESR2800D · Display menu description
9
ESR2800D · Display menu description
MAIN
MUTE
Mute switch set channel A&B mute on / o.
VOL
Sets the amplier input sensitivity in range from -24 to +6 dBu with 0,5dB step.
BAND MUTE
Mute switch set LOW, MID, HI band mute on / o.
SUB
MUTE
Mute switch set SUB OUT
A&B output mute on / o.
VOL
Sets the SUB OUT level in range
from -24 to +6 dBu with 0,5dB step.
SETUP
SUM MONO
Switch, sets SUB OUT outputs summing SUB OUT outputs channel A and B together.
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. Internal crossover frequency is 70Hz.
FACTORY RESET
Resets the ESR2800D amplier channels settings to factory default. Device
identication, Security and Network setup may be reset using the rear panel reset
button.
NET
NAME: Displays amplier name.
IP: Displays assigned network address.
MASK: Displays assigned network subnet mask.
Amplier name and IP address may be changed using web-server.
Display menu description
The ESR2800D has four main display screens for indication and setup. Main screens are: MAIN - for input levels and mutes.
SUB for subwoofer output levels and mutes. SETUP for SUB MONO mode, FULL RANGE mode and factory reset. NET for
network IP address and name indication.

ESR2800D · Web-server
10
ESR2800D · Web-server
ESR2800D Web-server
The ESR2800D web-server is accessible using a standard web browser on PC or mobile device. The appropriate ESR2800D
network address must be set to access web-server. The web-browser device IP address must be set from the same network
range and must be connected into the same network.
IP addresses are assigned to networked devices when they are congured for a specic network. The way that they are
assigned can be static or dynamic.
The ESR2800D network address may be set several ways:
Auto IP
(Default) Automatic Private IP Addressing, is a method of automatically assigning IP addresses to networked devices.
A networked device congured to use Auto IP rst makes a request to a DHCP server for an address. If the device does
not receive an IP address, which happens when there is no DHCP server on the network or when the DHCP server is not
responding, the device assigns itself an address. Auto IP addresses always follow this pattern: 169.254.x.y, where xand yare
any two numbers between 0 and 255. Unlike DHCP, Auto IP does not require a router or a separate server to assign an IP
address. The selected IP address is displayed on display - section NET, or can be obtained using the KV2 diagtool software.
DHCP
Dynamic Host Conguration Protocol. A DHCP server enables network devices to request IP addresses and networking
parameters automatically from the DHCP server, reducing the need for a network administrator or a user to manually assign
IP addresses to all network devices. The assigned IP address is displayed on display - section NET, or can be obtained using
the KV2 diagtool software.
It is important to know that a dynamic IP address can change. If a network device with a dynamic IP address suddenly stops
responding at its IP address, it is possible that it has obtained a new lease and its address has changed.
Static
A static IP address must be manually assigned to a network device. This address is typed by the person who sets up devices
on the network, and it never changes. A static IP address changes when the person who administers the network specically
changes it.

ESR2800D · Remote management
11
ESR2800D · Remote management
Web-server page
Open the ESR2800D web-server, use the ESR2800D IP address, which is shown on display - section NET, or can be obtained
using the KV2 diagtool software.
Overview
Shows the amplier basic information.
Basic Information
Shows the information assigned by user of the amplier: Description, Amplier name, Location, Contact, Uptime.
Network status
Shows the amplier ethernet network address, netmask, mode and status.
Power
Shows the amplier power sources status: Mains power, Channel A & B power sources, Power over Ethernet.
Temperature
Shows the amplier channel A & B heat sinks temperatures, Diagnostic CPU temperature.
2800

ESR2800D · Remote management
Channels
Shows the amplier control parameters and amplier diagnostics information.
Control
Changes the amplier A&B control parameters, Full range (ON or OFF) , SUB Mono (ON or OFF), Mute (RED = amplier muted),
Input level (-24 to +6 dB), SUB level (-24 to +6 dB), Band mute (SUB, LOW, MID, HI mute ON or OFF)
Diagnostics
Shows amplier diagnostics information.
Signal
Green when input signal is present.
Speaker protection
Orange when speaker protection hits.
Temperature
Shows the amplier channel A & B heat sinks temperatures.
Output voltage
Shows the amplier speaker output voltage.
Output current
Shows the amplier speaker output current.
12
ESR2800D · Remote management

ESR2800D · Remote management
Diagnostics
Shows the ESR2800D amplier and its components diagnostics information. Dual colour - Green = OK / Red = no power
or some problem occurs.
Device
Sums ESR2800D diagnostics together
Channel A & B
Sums amplier channel diagnostics information: Power source, Temperature, Health (ampliers A / B LOW, MID, HI working
OK with dedicated gain)
Temperature
Displays ampliers heat sinks A & B temperatures (°C).
Protection
When red they indicate that that channel has overheated and shut down. The unit will Auto Reset after it cools down to a safe
operating temperature.
13
ESR2800D · Remote management

ESR2800D · Remote management
14
ESR2800D · Remote management
Settings
Shows and sets the device information, web-server password, network address.
Device identication
Shows and sets the device local information, Device name, Location, Contact.
Security
Sets name and password for web-server security (default User name: admin, default Password: admin)
Network
Sets the Ethernet IP mode. AutoIP/DHCP (default). Static (IP address and netmask must be set).

ESR2800D · Specications
15
ESR2800D · 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 output
Rated Continuous Power 100W
Distortion <0.02%
Operating Bandwidth 2.5kHz to 40kHz
Mid Frequency Amplier Specication
Type Class AB - Push Pull - Low IM Design, Transformer balanced output
Rated Continuous Power 200W
Distortion <0.02%
Operating Bandwidth 500Hz to 2,5kHz
Low Frequency Amplier Specication
Type High eciency, Current-enhancing switch mode
Rated Continuous Power 1000W
Distortion <0.02%
Operating Bandwidth 20Hz to 500Hz
Signal Input
Input Sensitivity 1.0V RMS
Input Impedance 20kΩ (balanced)
Speaker Output
Speaker Output 2x AP6 female
Features
Network Ethernet: SMNP, Webserver
Power
Power Connector 2x Neutrik PowerCon®
Operating Voltage 115V / 230V / 250V
Operating Voltage Range 100 to 120V@60Hz | 205 to 240V@50Hz | 225 to 260V@50Hz
Recommended Amperage 2x10A 115V | 2x5A 230V | 2x5A 250V
Physical Dimensions
Height 177 mm (6.97"), 4RU
Width 481.4 mm (18.95")
Depth 455.3 mm (17.93")
Weight 36 kg (79.37lbs)
Specications

ESR2800D · Using the System
Full range setup
16
ESR2800D · Using the System
Set ESR2800D Amplier to FULL RANGE ON mode. ESR212 cabinets plays full range signal.

ESR2800D · Using the System
External subwoofer setup
Set ESR2800D 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.
17
ESR2800D · Using the System

ESR2800D · Block Diagram
ESR2800D Block Diagram
Channel A, channel B is identical
18
ESR2800D · Block Diagram