KV2 Audio EPAK2500R User manual

User Guide
EPAK2500R
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.

EPAK2500R · IMPORTANT SAFETY INSTRUCTIONS
IMPORTANT SAFETY INSTRUCTIONS
IMPORTANT SAFETY INSTRUCTIONS
Before using your EPAK2500R, be sure to carefully read the applicable items of these operating
instructions and the safety suggestions
1. Keep this manual for future reference.
2. Heed all warnings.
3. Follow all instructions.
4. Do not use this unit near water. Do not spill water or other liquids into or on the unit. Do not operate
the EPAK2500R while wet or standing in liquid.
5. Clean only with dry cloth.
6. Do not block the air intake or exhaust ports. Install the unit in accordance with the instructions.
7. Do not operate the EPAK2500R near heat producing devices such as radiators, heat registers, stoves or other
apparatus that produce heat.
8. Always operate the unit with the chassis ground wire connected to the electrical safety earth. Do not defeat
the safety purpose of a grounding-type plug. A grounding type plug has two pins and a third grounding prong.
The third prong is provided for your safety. If the provided plug does not t into your outlet, consult an electrician
for replacement of the obsolete outlet.
9. Connect only to AC power outlets rated 115-250V, 50-60Hz.
10. Do not use this EPAK2500R if the power cable is broken or frayed. Protect the power cable from being walked
upon or pinched particularly at the plugs and the point where it exits from the apparatus.
11. Only use accessories specied by the manufacturer.
12. The unit is intended to be used in a 19" rack. Follow the mounting instructions. When a rack on wheels is used,
use caution when moving the loaded rack to avoid injury from tipping over.
13. Unplug this apparatus during lightning storms or when unused for long periods of time.
14. Do not connect an EPAK2500R output in parallel or series with any other EPAK2500R's output. Do not connect
the EPAK2500R output to any other voltage source, such as battery, mains source, or power supply, regardless
of whether the EPAK2500R is turned on or o.
15. Do not run the output of any EPAK2500R back into another channel's input.
16. Refer all servicing to qualied service personnel. Servicing is required when the apparatus has been damaged
in any way such as:
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17. Do not remove top or bottom covers. Removal of the cover will expose hazardous voltages. There are
no serviceable parts inside and removal may void the warranty.
18. An experienced user shall always supervise this professional audio equipment, especially if inexperienced adults
or minors are using the equipment.
CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE THE COVER.
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.

EPAK2500R · Contents
Contents · EPAK2500R
Contents
Introduction 3
Getting Started 4
Unpacking 4
Rack Mounting 4
Cooling 5
AC Requirements 5
Features 6
Front panel 6
Rear panel 7
Using the System 8
Normal Set Up 8 - 9
Using the Internal Sub In Insert 10
Using the Mid/Hi Insert 10
Feeding the Subwoofers from another source 11
Specications 12
Block Diagram 13
ES Series · Basic Congurations 14
ES Series · Basic Congurations · Single 14
ES Series · Basic Congurations · Single 15
ES Series · Basic Congurations · Single and Double 16
ES Series · Basic Congurations · Double 17
Warranty · Service 18
Notes 19 - 20

3
EPAK2500R · Introduction
EPAK2500R · Introduction
Introduction
Rack mount version of our popular EPAK2500 four-way, active control and amplication unit specically designed
for the ES Series modular loudspeaker system. Two shock mounted fans move air across the heatsinks which seal
and protect the electronic components. This minimizes maintenance cycles and improves the components lifespan
and reliability. Both the EPAK2500 and EPAK2500R utilize KV2's industry leading 20MHz sampling for on board time
alignment and phase correction of all components in the ES system.
Application
Specically designed as the amplication and control
elements for the ES loudspeaker systems in a full rack
mount module
t Portable PA
t Fixed installations
t Bars and Nightclubs
t Houses of Worship
EPAK2500R - part number KVV 987 061 (230V)
KVV 987 181 (250V)
KVV 987 062 (115V)
The amplier compliment inside the EPAK2500R 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.
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line driver 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 unit 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 EPAK2500R.
FOR YOUR SAFETY, READ THE IMPORTANT PRECAUTIONS SECTION AS WELL AS THE INPUT, OUTPUT
AND POWER CONNECTION SECTIONS OF THIS MANUAL.

4
EPAK2500R · Getting Started
EPAK2500R · Getting Started
Unpacking
Unpack the EPAK2500R and check to see if there is any damage to it. 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 EPAK2500R carton should contain:
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Rack Mounting
EPAK2500R's 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 EPAK2500R using just the front panel as support. Use eight screws
and washers to mount the amplier to the equipment rack rails (four for the front and four for the rear).
We recommend using a shock mounted rack for touring use to prolong the life of your EPAK2500R.

5
EPAK2500R · Getting Started
EPAK2500R · Getting Started
Cooling
The EPAK2500R 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 amplier by the two fans on the rear panel, this passes over the cooling ns
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.
AC Requirements
A PowerCon cable is provided to connect the EPAK2500R to a suitable AC power supply.
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.
Your EPAK2500R will be supplied pre set to the voltage used in your area.
The table below provides typical current draw gures for the EPAK2500R.
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 8.25A 12.5A
230V 9A 14A
115V 18A 28A

6
EPAK2500R · Features · Front panel
EPAK2500R · Features · Front panel
Front panel
1) AC Mains Switch
The EPAK2500R has a combination AC Mains 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.
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will light and the unit will shut down.
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audio limiter has been activated. When red it indicates
that the thermal limit of the EPAK2500R has been
exceeded and the unit has shut down because of this.
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AC power is on. When red it indicates that there is a fault
condition sensed within the EPAK2500R and that the unit
needs servicing.
5) Signal Present
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the EPAK2500R's input.
6) Sub Set Up
This switch is set according to which combination
of subwoofers is being used with the system. Refer to
'Using the System' for further information, the various
combinations are listed in the table within this section.
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This controls the output level of the high frequency
amplier to enable you to adjust the high frequency
component of the ES system to the desired level.
8) ES1.0 System
This switch sets the controller for use when either
a single ES1.0 is being used or a double system using
2 ES1.0's are being used. In this mode another EPAK2500R
would be required to power the second ES1.0 and both
switches should be set to 'Double'.
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This is the master level control for the system and will
aect both the ES1.0 and the subwoofer outputs.
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This is the level control for the External Sub output; it is
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This is the level control for the Internal Sub output; it is
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7
EPAK2500R · Features · Rear panel
EPAK2500R · Features · Rear panel
Rear panel
1) Main Input / Through Signal Out
This is the main system input connector with associated
'Through Signal Output' connector for sending
unprocessed signal to other devices, such as more
EPAK2500R's to power more ES1.0's in a system.
2) Input Z
This switch selects one of two input impedance settings
for the EPAK2500R. The switch should be set to the 50
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EPAK2500R is being driven from a standard mixing
console output, then the 10k setting should be used.
3) Mid/High In / Pre Control Out
This is an insert point for the Mid/High section of the
EPAK2500R, the signal sent to the ES1.0 cabinet. It
enables you to 'insert' an external device (a delay line for
example) into the signal that is being sent to the ES1.0.
With the associated switch in the 'Engage' setting the
Pre Control Out connector would send the signal to the
external device, and its output would be returned into
the Mid/High In connector.
4) Internal Sub In
This 'insert' point allows you to drive the internal
subwoofer amplier from an external source. The signal for
the internal subwoofer amplier is usually derived from
the Main Input on the EPAK2500R but with this Sub In
and associated switch the option is available to derive
the signal input for the internal subwoofer section from
a dierent source. For further information see 'Using
the System'.
5) External Sub In, External Sub Out
Apart from providing signal processing and power
amplication for driving the ES1.0 enclosure and ES
subwoofers the EPAK2500R also provides processed outputs
for feeding VHD3200 subwoofer ampliers to drive various
combinations of ES and VHD subwoofers. The signal for this
is usually derived from the Main Input on the EPAK2500R
but with these Sub In and Sub Out connectors and
associated switch the option is available to derive the signal
input for the external subwoofer section from a dierent
source. For further information see 'Using the System'.
6) PowerCon Power Connector
Accepts a standard PowerCon terminated AC cable.
7) Fans
The cooling fans operate continuously while the
EPAK2500R 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 EPAK2500R is mounted.
8) ES1.0 AP6 Connector
Accepts a standard AP6 terminated loudspeaker cable for
connecting up to a single ES1.0 cabinet. We recommend
using 2.5 mm/core cables.
9) Internal Sub AP4 Connector
Accepts a standard AP4 terminated loudspeaker cable
for connecting up to various ES series subwoofers. We
recommend using 2.5 mm/core cables.
Minimum load impedance is 4Ω !

8
EPAK2500R · Using the System
EPAK2500R Setting Internal External
Setting 1 1 x ES1.8 + 2 x ES1.5 11 x ES1.8 + 2 x ES1.5 1
Setting 2 2 x ES1.5 22 x ES1.5 2
Setting 3 2 x ES1.8 2 x ES1.8
Setting 4 1 x ES2.5 1 x ES2.5
Setting 5 1 x ES2.5 2 x ES1.8
Setting 6 (5-way system) 1 x ES2.5 2 x VHD1.21 3
EPAK2500R · Using the System
Normal Set Up
The EPAK2500R is designed to actively power one ES1.0 cabinet and associated subwoofer systems. For Normal Mode
operation signal is applied to the 'Main Input' connector and all the 'Insert' switches would be in the 'Disengage'
position.
The Input Z switch should be set to match the output impedance of the device feeding the EPAK2500R. If you are using
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feeding more than one EPAK2500R then they should all be set to 10k with the last one in the signal chain set to 50.
Six dierent combinations of subwoofers are accommodated for when using the EPAK2500R.
The combinations are as follows:
Notes on Subwoofer Combinations
1. Setting 1 is set up for driving 1 x ES1.8 + 2 x ES1.5. It can also drive 1 x ES1.8 + 1 x ES1.5, in this mode the relevant
Sub level control (either Internal or External) should be increased by up to +6dB.
2. Setting 2 is set up for driving 2 x ES1.5. It can also drive 3 x ES1.5, in this mode the relevant Sub level control (either
Internal or External) should be decreased by -3dB. This setting can also drive just 1 x ES1.5 with the relevant Sub
level control adjusted accordingly, dependant on the application.
3. Setting 6 is a true 5-way setting. The ES2.5’s are actively crossed over with the VHD1.21's.
Subwoofer Impedance
ES1.5 16Ω
ES1.8 8Ω
ES2.5 4Ω
ES2.6 8Ω
VHD1.21 8Ω
ES Subwoofers Impedances

9
EPAK2500R · Using the System
EPAK2500R · Using the System
Normal Set Up
The EPAK 2500R is designed to actively power one ES1.0 cabinet and associated subwoofer systems.
Subwoofers are connected in parrallel, the total minimum impedance load should not be lover than 4Ω.
Normal Set Up With Additional Subwoofers
To power more subwoofers, use aditional subwoofer amplier - VHD3200.
Use External Sub Out signal output for feeding VHD3200 subwoofer ampliers.
'Internal' denotes subwoofers powered by the internal subwoofer amplier.
'Internal' denotes subwoofers powered by the internal subwoofer amplier.
'External' denotes subwoofers powered by an external VHD3200 subwoofer amplier,
fed from the EPAK2500R's External Sub Out connector.