KV2 Audio EPAK2500 User manual

User Guide
EPAK2500
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.

EPAK2500 · Important Safety Instructions
EPAK2500 · Important Safety Instructions
Important Safety Instructions
Before using your EPAK2500, 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. Do not use this EPAK2500 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.
12. Only use accessories specied by KV2 Audio.
13. Follow the mounting instructions.
14. Unplug this unit during lightning storms or when unused for long periods of time.
15. Do not connect an EPAK2500 output in parallel or series with any other EPAK2500's output. Do not connect
the EPAK2500 output to any other voltage source, such as battery, mains source, or power supply, regardless
of whether the EPAK2500 is turned on or o.
16. Refer all servicing to qualied service personnel. Servicing is required when the EPAK2500 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 EPAK2500; rain or moisture has entered the unit; the unit has been dropped; or when for undetermined reasons
the unit does not operate normally.
17. Do not remove covers. Removal of the cover will expose hazardous voltages. There are no user serviceable parts inside
and removable may void the warranty.
18. An experienced user shall always supervise this professional audio 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.

EPAK2500 · Contents
EPAK2500 · Contents
Introduction 3
Introduction 3
Getting Started 4
Unpacking 4
Mounting 4
AC Power Requirements 4
Voltage Requirements 4
Cooling 4
Features 5
Upper Panel 5 - 6
Bottom Panel 7
Using the system 8
Normal set up 8
Using the subwoofer insert 9
EPAK2500 Dimensions 9
Block Diagram 10
Specication 11
Accessories 12
Warranty · Service 13
Notes 14 - 16
Contents

3
EPAK2500 · Introduction
EPAK2500 · Introduction
EPAK2500 - part number KVV 987 134 (250V)
KVV 987 000 (230V)
KVV 987 001 (115V)
Application
Specically designed as the amplication
and control elements for ES loudspeaker systems
• Portable PA
• Fixed Installations
• Bars and Nightclubs
• Houses of worship
Introduction
The EPAK2500 is a four-way, active control and amplication system specically designed
for the KV2 Audio ES Series™ modular loudspeaker systems. It houses all signal processing
and amplication as well as providing control for six dierent subwoofer cabinet
congurations, powered by the internal subwoofer amplier, along with providing control signal to an external subwoofer
amplier to power further subwoofer cabinets if needed.
Unlike most other speaker manufacturers, KV2 Audio is equally expert in electronic design - in fact, we're fty-year veterans
at building rugged, high-current power amps. When you're able to perfectly match an amp with a transducer, you unlock
incredible performance that is impossible with passive systems. The amplier can perfectly handle the impedance swings of
the transducer. It can deliver exactly the right amount and type of power. Reliability goes up dramatically as does sound quality.
Each amplier in the EPAK2500 perfectly compliments the transducers it's coupled to. They are therefore very dierent from
each other with respect to construction and purpose.
Mid / High Ampliers. Both the mid and high frequency ampliers inside the EPAK2500 are Class AB, Push-Pull amplier
circuits using (MOSFET) Transistors output stage devices. The entire performance strategy for this type of design is based
on producing the lowest inter-modulation distortion possible and the highest audio quality in the critical mid and high
operating bands. Both ampliers are coupled to the mid/high drivers through transformer balanced speaker outputs.
Mid Bass and Low Frequency Ampliers
For these frequency ranges, we've selected a very high eciency and rened low frequency amplier topology.
The unique part of the design is in the voltage amplier's ideal method in supplying current to the output stage. It's based on
a switcher design that supplies current both in its on and o position and superior bass reproduction quality. The system is
also 95% ecient lowering typical amplier losses and eliminating the need for forced cooling systems.
The amplier compliment inside the EPAK2500 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.
Mid Bass - 600-watt, high eciency, current-enhancing switch mode with Linear Active Filter.
Subwoofer - 1600-watt, high eciency, current-enhancing switch mode with Linear Active Filter.
Robust mechanical design
The EPAK2500 is enclosed in a road-rugged case with two corner handles,
aluminium corners and edges cover.
Case has removable front panel with built-in cable storage compartment.

4
EPAK2500 · Getting Started
EPAK2500 · Getting Started
Unpacking
Unpack the EPAK2500 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 any damage incurred during shipping. Be sure to save the carton
and all packaging 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 EPAK2500 carton should contain:
• EPAK2500Amplierunit
• User'sGuide
• PowerCondetachablepowercable
• ESCableKit-KVV987047(contains2pcsLF15,1pcLF40,1pcMH60cables)
Mounting
For additional reliability, the amplier unit is mounted on a suspension system that isolates it from the shocks and impacts
typically encountered on the road. For installations, use the EPAK2500 Wall mounting kit - KVV987024.
Cooling
The EPAK2500 has a comprehensive passive cooling system with demand-sensitive forced cooling back-up, 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.
It is important to have an adequate air supply around the amplier allow the cooling air to ow. Do not expose amplier
heatsing to the direct sunlight.
If the heat sink gets too hot, its sensing circuit will open the output relay, disconnecting the load.
Voltage requirements
Your EPAK2500 will be supplied pre set to the voltage used in your area. The table below provides typical current draw gures
for the EPAK2500.
AC Input Current draw with amplier running
at Average Power
Current draw with amplier running
at Peak Power
250V 8,25 A 12.5 A
230V 9 A 14 A
115V 18 A 28 A
IF THE ON LED DOES NOT ILLUMINATE OR THE SYSTEM DOES NOT RESPOND TO AUDIO INPUT REMOVE AC POWER
IMMEDIATELY. VERIFY THAT THE VOLTAGE IS WITHIN THE PROPER RANGE. IF THE PROBLEM PERSISTS, PLEASE
CONTACT KV2 AUDIO OR AN AUTHORIZED SERVICE CENTER.
AC Power Requirements
The EPAK2500 uses a standard PowerCon AC connector. The device must be connected to a suitable mains socket outlet with
protective earthing connection.
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.

5
EPAK2500 · Features · Upper panel
EPAK2500 · Features · Upper panel
Power ON / Bass limit
This is a dual colour LED, when green it indicates that the AC power is on.
When red it indicates that the audio bass amplier limiter has been activated.
Signal preset / Mid - Hi limit
This is a dual colour LED, green indicates when audio signal is present at the EPAK2500's
input. When red it indicates that the audio mid-hi amplier limiter has been activated.
Thermal (auto reset)
When red it indicates that the thermal limit of the EPAK2500 has been exceeded and the unit has shut down because of this.
BASS SECTION
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.
Bass Level
This is the level control for the Internal Subwoofer output; it is 'post' the Master Level control.
Managenent
This switch turns on the low frequency enhancement circuitry (EXTENSION position) which boosts frequencies around 60Hz
to enhance the lowest frequency band.
Upper panel

6
EPAK2500 · Features · Upper panel
EPAK2500 · Features · Upper panel
SYSTEM SECTION
Master level
This is the master level control for the system and will ect both
the ES1.0 and the subwoofer outputs.
ES1.0 Speakers
Press this switch when using double ES1.0 system.
When normal single ES1.0 system is used, this button is depressed.
SIGNALINPUT
Main input
This is the main system balanced signal input connector.
Through signal out
'Through Signal Output' connector associated in parrallel with Main
input for sending unprocessed signal to other devices, such as more
EPAK2500's to power more ES1.0's in a system.
Upper panel
Main Input Through signal out
1 = Ground
2 = Hot (+)
3 = Cold (-)

7
EPAK2500 · Features · Bottom panel
EPAK2500 · Features · Bottom panel
AC Mains switch
The EPAK2500 has a combination AC Mains switch/circuit breaker
on the bottom 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.
PowerCon Power Connector
Accepts a standard PowerCon terminated AC cable.
Fans
The cooling fans operate continuously while the EPAK2500 is on. An internal temperature sensor
increases the speed of the fans during high temperature conditions.
SUBWOOFER INSERT
Allows you to insert into the subwoofer signal path more
components, such as delay lines etc. It is activated by pressing
ENGAGEbutton.Incaseofnon-usethisbuttonmustbe
depressed-DISENGAGE.Subwooferinputandoutputare
balanced XLR, output can be used as an ouput for external
subwoofer system (EX2.5).
ES1.0 AP6 connector
Accepts a standard AP6 terminated loudspeaker cable
for connecting up to a single ES1.0 cabinet.
We recommend using 2.5mm/core cables..
Subwoofer AP4 connector
Accepts a standard AP4 terminated loudspeaker cable
for connecting up to various ES series subwoofers.
We recommend using 2.5mm/core cables.
Bottom panel

8
EPAK2500 · Using the System
EPAK2500 · Using the System
Using the System
Normal set up
The EPAK2500 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 the 'Insert' switch would be in the 'Disengage' position.
Six dierent combinations of subwoofers setup are accommodated for when using the EPAK2500. The combinations are
as follows:
EPAK2500 Setting Subwoofer conguration
1 1 x ES1.5
2 2 x ES1.5
3 3 x ES1.5
4 1 x ES2.5 or 2 x ES2.6
5 1 x ES1.5 + 1 x ES1.8
6 2 x ES1.8
Setting 1
Setting 4
Setting 2
Setting 5
Setting 3
Setting 5
Setting 4
Setting 6

459
705.4
283
99.5
229.5
119.8
224
210.3
456
78
719 380
350
57.5
478
110.5
305
221.25
719
716.36
130.75
235
239
697 697
303
67
EPAK2500 · Using the System
9
EPAK2500 · Using the System
Using the System
Using the subwoofer insert
The subwoofer insert point gives you the ability to 'insert' a signal processing device into the ES subwoofer signal chain.
For instance in some instances it may be necessary to 'delay' the signal going to the subwoofer using a delay line. The Main
Input is used as the system input, as per Normal Mode, but the subwoofer insert switch is switched to 'Engage'. A feed is
taken to the delay line from the 'Pre Control Out' connector and the return from the delay line is connected to the 'Mid/Hi In'
connector as per the diagram:
EPAK2500 lower panel
Device connected into subwoofer insert
EPAK2500 Dimensions

EPAK2500 · Block diagram
10
EPAK2500 · Block diagram
Block diagram

11
EPAK2500 · Specications
Specications
High Frequency Amplier Specication
Type Class AB Push-Pull low inter-modulation Mosfet design
with transformer balanced output
Rated Continuous Power 100W
Distortion <0.05%
Operating Bandwidth 2.5kHz to 28kHz
Mid Frequency Amplier Specication
Type Class AB Push-Pull low inter-modulation Mosfet design
with transformer balanced output
Rated Continuous Power 200W
Distortion <0.05%
Operating Bandwidth 500Hz to 2.5kHz
Mid-Bass Frequency Amplier Specication
Type High eciency, Low frequency, Current-enhancing
switch mode
Rated Continuous Power 600W
Distortion <0.05%
Operating Bandwidth 130Hz to 500Hz
Low Frequency Amplier Specication
Type High eciency, Low frequency, Current-enhancing
switch mode
Rated Continuous Power 1600W
Distortion <0.05%
Operating Bandwidth 20Hz to 130Hz
Signal Input
Input Sensitivity 1.0V RMS
Input Impedance 20kΩ (balanced)
Speaker Output
Speaker Output AP6 (Mid-Hi), AP4 (Sub)
Power
Power Connector Neutrik PowerCon®
Operating Voltage Range 100 to 120V@60Hz | 205 to 240V@50Hz | 225 to 260V@50Hz
Recommended Amperage 20A 115V | 10A 230V | 10A 250V
Physical Dimensions
Height 719 mm (28.30")
Width 478 mm (18.82")
Depth 305 mm (12")
Weight 32 kg (70.4lbs)
EPAK2500 · Specications

EPAK2500 · Accessories
12
EPAK2500 · Accessories
ES Mid/Hi speaker cable MH15,
AP6 connectors - 1,5 m
part name: MH15
part number: KVV 987 147
- 1,5 m (5ft), Mid/Hi Module hook-up
ES Mid/Hi speaker cable MH60,
AP6 connectors - 6 m
part name: MH60
part number: KVV 987 125
- 6 m (20ft), Mid/Hi Module hook-up
ES Mid/Hi speaker cable MH120,
AP6 connectors - 12 m
part name: MH120
part number: KVV 987 126
- 12 m (40ft), Mid/Hi Module hook-up
ES Mid/Hi speaker cable MH180,
AP6 connectors - 18 m
part name: MH180
part number: KVV 987 127
- 18 m (60ft), Mid/Hi Module hook-up
ES Bass speaker cable LF15,
AP4 connectors - 1,5 m
part name: LF15
part number: KVV 987 121
- 1,5 m (5ft)
- for ES Bass Module daisy-chaining
ES Bass speaker cable LF40,
AP4 connectors - 4 m
part name: LF40
part number: KVV 987 122
- 4 m (13ft)
- for ES Bass Module hook-up
ES Bass speaker cable LF100,
AP4 connectors - 10 m
part name: LF100
part number: KVV 987 123
- 10 m (33ft)
- for ES Bass Module hook-up
ES Bass speaker cable LF200,
AP4 connectors - 20 m
part name: LF200
part number: KVV 987 124
- 20m (66ft)
- for ES Bass Module hook-up
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
Amphenol AP4 cable-mount
female connector
part name: AP-4-11
part number: KVV 987 048
Amphenol AP4 cable-mount
male connector
part name: AP-4-12
part number: KVV 987 049
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
EPAK2500 Wall mounting kit
part name: WALLMNT - BRCKT
part number: KVV 987 332

EPAK2500 · Warranty · Service
Warranty
Your EPAK2500 is covered against defects in material and workmanship.
Refer to your supplier for more details.
Service
In the unlikely event that your EPAK2500 develops a problem, it must be returned to an authorized distributor, service
centre or shipped directly to our factory. Because of the complexity of the design and the risk of electrical shock, all repairs
must be attempted only by qualied technical personnel.
If the unit needs to be shipped back to the factory, it must be sent in its original carton. If improperly packed, the unit may be
damaged.
To obtain service, contact your nearest KV2 Audio Service Centre, Distributor or Dealer.
13
EPAK2500 · Warranty · Service

KVV120000-00-02-0
KV2 Audio International
Nádražní 936, 399 01 Milevsko
Czech Republic
Tel.: [phone]
Email: [email protected]
www.kv2audio.com
The Future of Sound.
Made Perfectly Clear.