EPAK2500
User Guide
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.
Contents
Introduction
How to use this manual 4
Icons used include 4
Important safety instructions 4
Introducing the EPAK2500 5
Getting Started
Unpacking 6
Mounting 6
AC Power requirements 6
Voltage requirements 6
Cooling 6
Features
Upper panel 7
Bottom panel 9
Using the system
Normal set up 10
Using the subwoofer insert 11
EPAK2500 Dimensions 11
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
authorised 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 qualified 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 of Dealer.
Block Diagram 12
Specification 13
Accessories 14
Page | 3
Introduction
How to use this manual
As you read this manual, you’ll find figures
and diagrams to help you understand and
visualise what you’re reading. You’ll also find
numerous icons that serve as cues to flag
important information or warn you against
improper or potentially harmful activities.
If the provided plug does not fit 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
Icons used include
“NOTE” identifies an
important or useful piece
of information relating to
NOTE
!
CAUTION
Important safety instructions
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.
the topic under discussion.
“CAUTION” gives notice
that an action can have
serious consequences and
could cause harm to
equipment or personel,
delays, or other problems.
point where it exits from the apparatus.
12. Only use accessories specified by
KV2 Audio.
13. Follow the mounting instructions.
CAUTION:
!
!
CAUTION
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
C
source, such as battery, mains source, or
power supply, regardless of whether the
EPAK2500 is turned on or off.
16. Refer all servicing to qualified 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.
16. 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.
17. An experienced user shall always supervise
this professional audio equipment.
Installation should only be done
by experienced professionals.
Page | 4
Introduction
Introducing the EPAK2500
The EPAK2500 is a four-way, active control
and amplifiation system specifically designed
for the KV2 Audio ES Series™ modular loudspeaker systems. It houses all signal processing
and amplification as well as providing control
for six different subwoofer cabinet configurations, powered by the internal subwoofer
amplifier, along with providing control signal
to an external VHD3200 subwoofer amplifier
to power further subwoofer cabinets if
needed.
Unlike most other speaker manufacturers,
KV2 Audio is equally expert in electronic
design - in fact, we’re fifty-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 amplifier 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 amplifier in the EPAK2500 perfectly
Mid Bass and Low Frequency Amplifiers
For these frequency ranges, we’ve selected a
very high efficiency and refined low frequency
amplifier topology.
The unique part of the design is in the voltage
amplifier’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
off position and superior bass reproduction
quality. The system is also 95% efficient
lowering typical amplifier losses and eliminating the need for forced cooling systems.
The amplifier 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 efficiency,
current-enhancing switch mode
with Linear Active Filter.
Subwoofer - 1600-watt, high efficiency,
current-enhancing switch mode
with Linear Active Filter.
compliments the transducers it’s coupled to.
They are therefore very different from each
other with respect to construction and purpose.
Mid / High Amplifiers. Both the mid and high
frequency amplifiers inside the EPAK2500
are Class AB, Push-Pull amplifier 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 amplifiers are
coupled to the mid/high drivers through
transformer balanced speaker outputs.
NOTE:
NOTE
For the best performance where
possible use only KV2 Audio
components, any other component may negatively affect the
sound quality.
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.
Page | 5
Getting started
Unpacking
Unpack the EPAK2500 and check to see if
there is any damage to it. If you find 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:
s%0!+!MPLIFIERUNIT
s%0!+5SERGUIDE
s0OWER#ONDETACHABLEPOWERCABLE
s%3#ABLE+IT+66CONTAINSPCS
,&PC,&PC-(CABLES
Voltage requirements
Your EPAK2500 will be supplied pre set to the
voltage used in your area. The table below
provides typical current draw figures for the
EPAK2500.
Current draw with
AC Input
250V 8.25A 12.5A
230V 9A 14A
115V 18A 28A
amplier running at
Average Power
Current draw with
amplier running at
Peak Power
CAUTION:
!
CAUTION
!
AUTION
If the On LED does not illuminate
or the system does not respond to
AUDIOINPUTREMOVE!#POWER
IMMEDIATELY6ERIFYTHATTHE
voltage is within the proper
range. If the problem persists,
PLEASECONTACT+6!UDIOORAN
authorized service center.
Mounting
For additional reliability, the amplifier 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 -
+66
AC Power requirements
The EPAK2500 USESASTANDARD0OWER#ON!#
connector. The device must be connected to a
suitable mains socket outlet with protective
earthing connection.
CAUTION:
!
CAUTION
4HE0OWER#ONISACONNECTOR
without breaking capacity, i.e. the
0OWER#ONSHOULDNOTBECONNECted or disconnected under load or
while it is live. Always isolate your
!#SUPPLYBEFOREDISCONNECTING
THE0OWER#ONCONNECTOR
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
DRIVESAIRACROSS0#"BOARDSCONNECTORSOR
components ensuring prolonged electronic
component lifespan and minimizing maintenance cycles.
It is important to have an adequate air supply
around the amplifier allow the cooling air to
flow. Do not expose amplifier heatsing to the
direct sunlight.
If the heat sink gets too hot, its sensing circuit
will open the output relay, disconnecting the
load.
Page |
Features
Upper panel
SYSTEM STATUS
POWER ON
/
BASS LIMIT
SIGNAL PRESENT
MID- HI LIMIT
THERMAL
(
AUTO RESET
BASS
ES2.5 or ES2.6
SET UP
SET UP
3X
/
2X
)
1X
2x
-3
-6dB
MANAGEMENTBASS LEVEL MASTER LEVEL ES 1.0 SPEAKERS
0
+3
ATTACK
EXTENSION
+6dB
SYSTEM
0
-3
+3
1 PER SIDE
2 PER SIDE
-6dB
+6dB
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 amplifier 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 amplifier
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.
MAIN INPUT THROUGH SIGNAL OUT
SYSTEM STATUS
POWER ON
BASS LIMIT
SIGNAL PRESENT
MID- HI LIMIT
THERMAL
(
AUTO RESET
/
/
)
BASS SECTION
BASS
3X
2X
1X
SET UP
SET UP
ES2.5 or ES2.6
-3
-6dB
0
+6dB
2x
+3
MANAGEMENTBASS LEVEL
ATTACK
EXTENSION
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.
Page | 7
Features
Upper panel
SYSTEM STATUS
POWER ON
/
BASS LIMIT
SIGNAL PRESENT
MID- HI LIMIT
THERMAL
(
AUTO RESET
SET UP
SET UP
3X
/
2X
)
1X
ES2.5 or ES2.6
BASS
2x
MANAGEMENTBASS LEVEL MASTER LEVEL ES 1.0 SPEAKERS
0
-3
+3
ATTACK
EXTENSION
-6dB
+6dB
0
-3
+3
-6dB
+6dB
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
SYSTEM
MAIN INPUT THROUGH SIGNAL OUT
1 PER SIDE
2 PER SIDE
SYSTEM
MASTER LEVEL ES 1.0 SPEAKERS
0
-3
-6dB
+3
+6dB
1 PER SIDE
2 PER SIDE
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.
MAIN INPUT THROUGH SIGNAL OUT
12
3
21
3
1 = Ground
2 = Hot (+)
3 = Cold (-)
Page | 8
Features
Bottom panel
WARNING:
RISK OF ELECTRIC SHOCK
DO NOT OPEN
CAUTION
AVIS:
RISQUE DE CHOC ELECTRIQUE
NE PAS OUVRIR
1
DESIGNED BY KV2 AUDIO, MANUFACTURED IN THE EUROPEAN UNION, WWW.KV2AUDIO.COM
WARNING:
0
THIS SURFACE MAY REACH HIGH TEMPERATURE DURING STANDARD USE.
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 SERVICE–
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.
AC Mains switch
The EPAK2500 has a combination AC Mains switch/circuit
breaker on the bottom panel. If the switch shuts off during
normal use, push it back to the ON position once. If it will not
stay on you should take the unit to qualified service personnel
to have it serviced.
PowerCon Power Connector
Accepts a standard PowerCon terminated AC cable.
SERIAL NUMBER
DISENGAGE
ENGAGE
SUBWOOFER
INSERT
MID / HIGH SUBWOOFER
1
0
INOUT
ES SERIES SUBSES 1.0
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
DISENGAGE
ENGAGE
SUBWOOFER
INSERT
as an ouput for external subwoofer system (EX2.5).
ES1.0 EP6 connector
Accepts a standard EP6 terminated loudspeaker cable
for connecting up to a single ES1.0 cabinet.
We recommend using 2.5mm/core cables.
INOUT
ES SERIES SUBSES 1.0
Subwoofer EP4 connector
Accepts a standard EP4 terminated loudspeaker cable
for connecting up to various ES series subwoofers.
We recommend using 2.5mm/core cables.
MID / HIGH SUBWOOFER
Page | 9
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 different combinations of subwoofers setup are accommodated for when using the EPAK2500.
The combinations are as follows:
EPAK2500 Setting Subwoofer conguration
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 2 Setting 3 Setting 4
ES1.0
ES1.0
ES1.0
ES1.5
ES1.5
ES1.5
ES1.5
ES1.5
ES1.5
ES2.5 or ES2.6
SET UP
SET UP
3X
2X
1X
2x
3X
2X
1X
SET UP
SET UP
ES2.5 or ES2.6
ES2.5 or ES2.6
SET UP
2x
SET UP
3X
2X
1X
2x
SET UP
SET UP
3X
2X
1X
Setting 4 Setting 5 Setting 5 Setting 6
ES1.0
ES2.6
ES1.0
ES1.5
ES1.5
ES1.0
ES2.6
ES1.0
ES2.5
ES2.5 or ES2.6
ES1.0
ES1.8
2x
SET UP
SET UP
3X
2X
1X
Page | 10
ES2.6
ES2.5 or ES2.6
SET UP
SET UP
ES1.8
ES2.5 or ES2.6
SET UP
2x
SET UP
3X
2X
1X
ES1.8
ES2.5 or ES2.6
SET UP
2x
SET UP
3X
2X
1X
2x
3X
2X
1X
ES1.8
ES2.5 or ES2.6
2x
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:
1
0
EPAK2500 lower panel
EPAK2500 Dimensions
WARNING:
RISK OF ELECTRIC SHOCK
DO NOT OPEN
CAUTION
AVIS:
RISQUE DE CHOC ELECTRIQUE
NE PAS OUVRIR
DESIGNED BY KV2 AUDIO, MANUFACTURED IN THE EUROPEAN UNION, WWW.KV2AUDIO.COM
WARNING:
THIS SURFACE MAY REACH HIGH TEMPERATURE DURING STANDARD USE.
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 SERVICE–
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.
SERIAL NUMBER
DISENGAGE
ENGAGE
SUBWOOFER
MID / HIGH SUBWOOFER
OUT
IN
MID/HIGH
SUBWOOFER
INSERT
INOUT
ES SERIES SUBSES 1.0
OUT
Device connected into subwoofer insert
IN
Page | 11
Block diagram
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Page | 12
EPAK2500 Specifications
High Frequency Amplier Specication
Type
Class AB Push-Pull low inter-modulation Mosfet design
with transformer balanced output
Rated Continuous Power
Distortion
Operating Bandwidth
Mid Frequency Amplier Specication
Type
Rated Continuous Power
Distortion
Operating Bandwidth
Mid-Bass Frequency Amplier Specication
Type
Rated Continuous Power
Distortion
Operating Bandwidth
Low Frequency Amplier Specication
Type
Rated Continuous Power
Distortion
Operating Bandwidth
100W
<0.05%
2.5kHz ÷ 28kHz
Class AB Push-Pull low inter-modulation Mosfet
design with transformer balanced output
200W
<0.05%
500Hz ÷ 2.5kHz
High eciency, Low frequency, Current-enhancing
switch mode
600W
<0.05%
130Hz ÷ 500Hz
High eciency, Low frequency, Current-enhancing
switch mode
1600W
<0.05%
20Hz ÷ 130Hz
Speaker Input
Speaker Input
Signal Input
Input Sensitivity
Input Impedance
Power Requirements
Power Connector
Operating Voltage
Recommended Amperage
Physical Dimensions
Height
Width
Depth
Weight
EP6 (Mid-Hi), EP4 (Sub)
1.0V RMS
20kΩ
Neutrik PowerCon®
100÷120V@60Hz | 205÷240V@50Hz |
225÷260V@50Hz
20A 115V | 10A 230V | 10A 250V
700mm (27.55")
450mm (17.71")
290mm (11.41")
32kg (70.4lbs)
Page | 13
EPAK2500 Accessories
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
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 Bass speaker cable LF15,
AP4 connectors - 1,5m
part name: LF15
part number: KVV 987 121
- 1,5m (5ft)
- for ES Bass Module daisy-chaining
ES Bass speaker cable LF40,
AP4 connectors - 4m
part name: LF40
part number: KVV 987 122
- 4m (13ft)
- for ES Bass Module hook-up
ES Bass speaker cable LF100,
AP4 connectors - 10m
part name: LF100
part number: KVV 987 123
- 10m (33ft)
- for ES Bass Module hook-up
ES Bass speaker cable LF200, AP4
connectors - 20m
part name: LF200
part number: KVV 987 124
- 20m (66ft)
- for ES Bass Module hook-up
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 987 024
Page | 14
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.
KV2 Audio, Nádražní 936, 399 01 Milevsko, Czech Republic
Tel. +44(0)1423 816868
www.kv2audio.com
KVV120000-00-01-0
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