KV2 Audio EX Series User manual

User Guide
EX Series Subwoofers
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.
· EX1.2MkII · EX1.5 · EX1.8 · EX2.2 · EX2.5MkII

Important Safety Instructions
Before using your EX Series Subwoofers, 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. Install the product only with rigging specied by KV2 Audio, or sold with the loudspeaker.
14. Unplug this loudspeaker during lightning storms or when unused for long periods of time.
15. Refer all servicing to qualied service personnel. Servicing is required when the loudspeaker 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 loudspeaker; rain or moisture has entered the loudspeaker;
the loudspeaker has been dropped; or when for undetermined reasons the loudspeaker does not operate
normally.
16. 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.
17. 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 loudspeaker from the AC mains before installing audio cable.
Reconnect the power cord only after making all signal connections. Connect the loudspeaker to a twopole, 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 loudspeaker. Do not put objects containing liquid on or near the unit. To reduce the risk of overheating
the loudspeaker, avoid exposing it to direct sunlight. Do not install the unit near heat-emitting appliances, such as
a room heater or stove. This loudspeaker 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.
EX Series Subwoofers · Important Safety Instructions
EX Series Subwoofers · Important Safety Instructions

EX Series Subwoofers · Contents
Contents
EX1.2MkII 4
Overview 4 - 5
AC Power Requirements 6 - 7
Audio Signal 8 - 9
Specications 10
Congurations 11
Drawings 12
EX1.5 13
Overview 13 - 14
AC Power Requirements 15 - 16
Audio Signal 17 - 18
Specications 19
Drawings 20
EX1.8 21
Overview 21 - 22
AC Power Requirements 23 - 24
Audio Signal 25 - 26
Specications 27
Drawings 28
EX2.2 29
Overview 29 - 30
AC Power Requirements 31 - 32
Audio Signal 33 - 34
Specications 35
Drawings 36
EX2.5MkII 37
Overview 37 - 38
AC Power Requirements 39 - 40
Audio Signal 41 - 42
Specications 43
Suggested Systems 44
Drawings 45
Accessories 46 - 48
Warranty · Service 49
EX Series Subwoofers · Contents

EX1.2Mkll · Overview
Introduction
The EX1.2MkII is a small single 12"active subwoofer system. Employing passive cooling the EX1.2MkII boasts output
that belies its compact, low prole cabinet size, as with all KV2 Audio products. The enclosure dimensions makes
it ideal for discreet installations, as it can be installed either horizontally or vertically under seating and in furniture
surrounds. Featuring KV2 Audio's switching amplier technology, the EX1.2MkII delivers tight, fast and controlled bass
response at very high output levels from an impressively conservative cabinet footprint.
Electronics
Amplier power, electronic crossovers, equalization and speaker protection are integrated into the EX1.2Mkll's
amplier module. On-board electronics ensures fast, easy set up and complete control making it easy to setup and
provides long-term reliability. An improved version of KV2 Audio's switch mode, current enhancing low frequency
amplier has been specially developed for the EX1.2Mkll. The new design improves overall system eciency to over
90% and delivers 500 watts of continuous power.
KV2 Audio has developed an amplier topology that possesses two unique characteristics that are critically important
for high performance, active subwoofer systems. The EX1.2Mkll amplier topology delivers very high eciency
and generates minimal thermal losses allowing the amplier to deliver extremely high power levels reliably whilst
employing a simple cooling system.
Secondly, in order to reproduce low frequency information with high transient content and extend the operational
boundaries of the acoustic design, the amplier needs to deliver an extraordinary amount of current in order to keep
the woofer's high mass under control. This is especially true under typical "phase shift" conditions, in which the amount
of the current requirement is sometimes doubled. Through the implementation of a proprietary, switch mode amplier
technology, the EX1.2Mkll amplier provides extremely high eciency with low losses and delivers the highest woofer
control by delivering higher current levels under "phase shift" conditions.
Application
Specically designed to accompany and compliment
the EX6/EX10 as a true full range system
• For xed installation
• Bars, restaurants and small entertainment projects
• Small footprint and dimensions allow placement under
seating and xtures
EX1.2Mkll · Overview
part number
KVV 987 360 (230V)
KVV 987 359 (115V)
4

EX1.2Mkll · Overview
EX1.2Mkll · Overview
Acoustic Components
The EX1.2Mkll's woofer technology is based around high eciency, high power woofer designs. The device features:
high temperature polymide voice coil assemblies that undergo multiple baking and curing processes as well as
advanced magnetic structures with complex cooling systems. The woofer cones have been specially developed
to withstand the demanding environment created by the high acoustic loading inside the EX1.2Mkll chambers.
The EX1.2Mkll was designed using new concepts in twin asymmetrical acoustic chambers that deliver very high
speaker loading and output from a relatively small cabinet footprint. It is ideal for use in live applications that require
reproduction of low frequencies with very high transient content at high output levels.
Enclosure Design
There are four industrial grade, internal braces two placed at the top and two at the bottom of the cabinet. Each brace
is held in place by four M8 bolt and feature two M10 hang points providing a wide range of installation and suspension
exibility. There is also a standard 33mm pole mount "top hat" located on the top side of the cabinet.
5

EX1.2Mkll · AC Power Requirements
6
EX1.2Mkll · AC Power Requirements
AC Power
The EX1.2Mkll is an advanced self-powered loudspeaker system with on-board amplication and control systems.
Understanding power distribution, voltage and current requirements, as well as electrical safety issues, is critical to the
safe operation of the EX1.2Mkll.
The EX1.2Mkll uses a PowerCon 3-pole AC main system with locking connectors to prevent accidental disconnection.
The main AC connector (blue) serves as the power input.
The EX1.2Mkll operates in either 115V or 230V modes. Although pre-congured at the factory, the unit's operating
voltage mode can be changed in the eld.
Voltage Requirements
The EX1.2Mkll operates safely and without audio discontinuity if the AC voltage stays within the operating window
of 100V to 120V in 115V mode and 205V to 250V when working in 230V mode, at 50 or 60Hz.
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.
If the voltage drops below the low boundary of its safe operating range, the loudspeaker will shut down if the voltage
does not rise above the low boundary before storage circuits are depleted. How long the loudspeaker will continue
to function during brownout depends on the amount of voltage drop and the audio source level during the drop.
If the voltage increases above the upper boundary of the range, the power supply can be damaged.
It is recommended that the voltage supply be within the rated voltage window. This ensures that AC voltage
variations from the service entry-or peak voltage drops due to cable runs-do not cause the amplier to cycle
on and o or cause damage to the power supply.
For best performance, the AC cable voltage drop should not exceed 10 volts, or 10 percent at 115 volts
and 5 percent at 230 volts.
Make sure that even with the AC voltage drop, the AC voltage always stays within recommended operating ranges.
The minimum electrical service amperage required by a EX1.2Mkll speaker system is the sum of each loudspeaker's
maximum continuous rms current. An additional 50 percent above the minimum amperage is recommended to
prevent peak voltage drops at the service entry.
The Power Connector
The EX1.2Mkll requires a grounded outlet. It is very important that the loudspeaker AC supply be properly grounded in
order to operate safely and correctly. Use the PowerCon AC cable-wiring diagram on page 7 to create international or
specialpurpose power connectors:
Power connector assembly
6

EX1.2Mkll · AC Power Requirements
EX1.2Mkll · AC Power Requirements
Current Draw 115V Mode 230V Mode
Max Long Term Continuous 4A rms 2A rms
Burst Current 8A rms 4A rms
Short Term Peak 20A peak 10A peak
Current Requirements
Each EX1.2Mkll requires approximately 115V AC for proper operation. This allows two EX1.2Mkll to be powered from
one 16A breaker at 115V and up to four subwoofers at 230V.
The EX1.2Mkll presents a dynamic load to the AC mains, which causes the amount of current to uctuate depending
on quiet or loud operating levels. Since dierent cables and circuit breakers heat up at varying rates, it is essential to
understand the types of current ratings and how they correspond to circuit breaker and cable specications.
The maximum long-term continuous current consumption is the maximum rms current during a period of at least ten
seconds. It is used to calculate the temperature rise in cables, in order to select a cable size and gauge that conforms to
electrical code standards. It is also used to select the rating for slow reacting thermal breakers.
The burst current consumption is the maximum rms current during a period of approximately one second, used to
select the rating of most magnetic breakers and to calculate the peak voltage drop in long AC cables according to the
formula: V pk (drop)= I pk x R (cable total).
The ultimate short-term peak current is used to select the rating of fast reacting magnetic breakers. Use the table
below as a guide when selecting cable gauge size and circuit breaker ratings for your operating voltage.
AC Cable Color Coding
If the colors referred to in the diagram don't correspond to the terminals in your plug, use the following guidelines:
Connect the blue wire to the terminal marked with a N or colored black. Connect the brown wire to the terminal marked with
a L or colored red. Connect the green and yellow wire to the terminal marked with a E or colored green or green and yellow.
Power cable color coding
The EX1.2Mkll requires a ground connection. Always use a grounded outlet and plug.
7

EX1.2Mkll · Audio Signal
EX1.2Mkll · Audio Signal
The EX1.2Mkll Control Panel
The EX1.2Mkll features an easy to use rear control panel featuring audio input and output connections, level control,
LED status lights and a phase switch, that changes the phase of the high pass audio output signal. This serves as a tool
for integrating the full range cabinet and the subwoofer into challenging audio environments.
EX1.2Mkll Rear panel
Audio Input and Output
The EX1.2Mkll uses balanced, female XLR connectors for audio signal input, and a male XLR connector to provide
through output signal. The EX1.2Mkll features Left and Right stereo inputs and outputs allowing the product to be
integrated into stereo systems that require one subwoofer.
The EX1.2Mkll also features Left and Right High Pass Outputs that can be used to provide audio signal to full range
speakers being used in conjunction with the EX1.2Mkll. The high pass lter provides a crossover point of 125Hz.
The through output connector, wired in parallel to the audio input, will continue to provide the input signal if the
EX1.2Mkll is turned o. The audio input circuit presents a 20 kOhm balanced input impedance to a three-pin XLR
connector with the following connectors:
Main input Through output
Pin 1 - Ground
Pin 2 - Signal (+)
Pin 3 - Signal (-)
Case - Earth (AC) ground and chassis
Audio signal can be daisy-chained using the through output connector on the input panel. A single source can drive
multiple EX1.2Mkll subwoofers with a paralleled input loop. If you are driving multiple EX1.2Mkll's in an array, make
certain that the source device can drive the total load impedance presented by the paralleled input circuit of the array.
Most source equipment is safe for driving loads no smaller than 10 times the source's output impedance. For
example, cascading an array of 10 units consisting of EX1.2Mkll subwoofers produces an input impedance of
2000 ohms (20kOhms divided by 10). The source equipment should have output impedance of 200 ohms or
less. This is also true when connecting EX1.2Mkll's in parallel (loop out) with other KV2 Audio ampliers, active
speakers and subwoofers.
If the loudspeaker produces noises such as hiss and popping, disconnect the audio cable from the loudspeaker,
if the noise stops, then most likely the problem is not with the loudspeaker. Check the audio cable, source, and
AC power for the source of the problem.
Ensure that all cabling carrying signal to multiple ampliers and active speaker systems is wired correctly. Make
sure that the polarity has not been reversed. Reversed polarity can cause severe degradation in frequency
response and can also impact the dispersion characteristics of the speaker.
8

EX1.2Mkll · Audio Signal
EX1.2Mkll · Audio Signal
Ampliers and Acoustic Filters
A power amplier specically designed and optimized for the low frequency woofer powers the EX1.2Mkll .
The control system in the EX1.2Mkll processes the audio signal through a series of electronic lters and circuits providing
equalization, crossover lters, thermal and overdrive protection.
LED Status Lights
The EX1.2Mkll control panel uses three distinct LED's to provide operating status information.
Power On / Thermal LED
This LED turns green when the speaker is turned ON.The light will continue to be green during normal operation
of the speaker system. The LED will change from green to yellow under a thermal condition resulting from overheating
of the amplier system. Under this condition, the speaker system will shut down. You can expect for the system to be
down for at least 2-3 minutes depending the ambient temperature and whether the system is being exposed to direct
sun light.
Signal
There are individual LED's for each the Left and Right signal inputs. The LED turns green when there is audio signal
present in the EX1.2Mkll. This signal indicator can be used to troubleshoot wiring problems.
Limiter
Should the rms limiting system be engaged due to overdriving of the EX1.2Mkll, the LED will light up yellow.
The audible eect of the rms limiter is a lowering of overall output level. The rms limiter will disengage only if the input
level is turned down.
Please contact KV2 Audio or a local service representative should the system enter a thermal condition under
normal operating conditions.
Phase Switch
The EX1.2Mkll features a phase switch that changes the phase of the high pass audio output signal. Changing the
phase of the output signal serves as a tool for integrating the full range cabinet and the subwoofer into challenging
audio environments. We recommend using a suitable measuring device for performing relevant measurements and
determining whether the phase should be reversed.
Level Control
The EX1.2Mkll features a rotary control knob providing adjustment of the audio level. The operational range of the
control is –6dB to +6dB.
9

Specications
EX1.2Mkll · Specications
System Acoustic Perfomance
Max SPL Long-term 124dB
Max SPL Peak 130dB
-3dB Response 38Hz to 120Hz
-10dB Response 32Hz to 120Hz
Crossover Point 120Hz
Low Frequency Section
Acoustic Design Twin Asymmetrical loading
Woofer Size / Voice Coil Diameter / Design 12" / 3" / Inside outside
Magnet Type Neodymium
Diaphragm Material Epoxy Reinforced Cellulose
Low Frequency Amplier Specication
Type High eciency, Current-enhancing switch mode
Rated Continuous Power 500W
Distortion <0.05%
Signal Input
Input Sensitivity 1.0V RMS
Input Impedance 20kΩ (balanced)
Power Requirements
Power Connector Neutrik PowerCon®
Operating Voltage 115V / 230V
Operating Voltage Range 100 to 120V@60Hz | 205 to 250V@50Hz
Recommended Amperage 4A 115V | 2A 230V
Cabinet
Cabinet Material Baltic birch
Handles 2
Pole Mount M20
Color "Orange peeled" Matt Black or any RAL
Physical Dimensions
Height 370 mm (14.57")
Width 800 mm (31.49")
Depth 400 mm (15.75")
Weight 32 kg (70.5lbs)
EX1.2Mkll · Specications
10

EX1.2Mkll · Congurations
11
Single Subwoofer Conguration
Connection of two mid-hi EX10 cabinets with single active subwoofer EX1.2Mkll and mixing console.
The EX1.2Mkll features two channel active crossover, input L and R signals are summed together under crossover
frequency and then feeding subwoofer. Signal over crossover frequency are separated and connected through XLR
L,R HI PASS outputs
Two Subwoofers Conguration
Connection of two mid-hi EX10 cabinets with two active subwoofers EX1.2Mkll and mixing console.
The EX1.2Mkll features two channel active crossover, each channel uses one EX1.2Mkll as a crossover.
EX1.2Mkll · Using Multiple Boxes

EX1.2Mkll · Drawings
Drawings
EX1.2Mkll · Drawings
12

EX1.5 · Overview
part number
KVV 987 264 (230V)
KVV 987 265 (115V)
Introduction
The EX1.5 is a compact active subwoofer system featuring a single 15" neodymium woofer and a 500-watt high
eciency power amplier. Oering a peak SPL in excess of 130dB, the EX1.5 produces considerable output, yet in true
KV2 style retains a small footprint. A great all round subwoofer that will compliment any speaker system with tight
and dynamic bass. Designed to be both robust and easily transported, the EX1.5 sets the standard in active single 15"
subwoofers.
Electronics
Amplier power, electronic crossovers, equalization and speaker protection are integrated into the EX1.5's amplier
module. On-board electronics ensures fast, easy set up and complete control making it easy to set up and provides
long-term reliability. An improved version of KV2 Audio's switch mode, current enhancing low frequency amplier has
been specially developed for the EX1.5. The new design improves overall system eciency to over 90% and delivers
1000 watts of continuous power.
KV2 Audio has developed an amplier topology that possesses two unique characteristics that are critically important
for high performance, active subwoofer systems. The EX1.5 amplier topology delivers very high eciency and
generates minimal thermal losses allowing the amplier to deliver extremely high power levels reliably whilst
employing a simple cooling system.
Secondly, in order to reproduce low frequency information with high transient content and extend the operational
boundaries of the acoustic design, the amplier needs to deliver an extraordinary amount of current in order to keep
the woofer's high mass under control. This is especially true under typical "phase shift" conditions, in which the amount
of the current requirement is sometimes doubled. Through the implementation of a proprietary, switch mode amplier
technology, the EX1.5 amplier provides extremely high eciency with low losses and delivers the highest woofer
control by delivering higher current levels under "phase shift" conditions.
The amplier module is tted onto a large format, nned, aluminum alloy heat sink providing high ow, passive cooling
and eliminating standard maintenance cycles associated with forced cooled amplier designs. The entire mechanical
assembly is tted on a mechanical suspension system that isolates low frequency energy and ensures long-term
reliability.
Application
Specically designed to accompany and compliment
the EX10 / EX12 as a true full range high output system
• Portable PA applications
• Fixed Installations
• Scalable into multiple-larger systems
• Easy to add to existing systems
13
EX1.5 · Overview

EX1.5 · Overview
Acoustic Components
The EX1.5's woofer technology is based around high eciency, high power woofer designs. The device features: high
temperature polymide voice coil assemblies that undergo multiple baking and curing processes as well as advanced
magnetic structures with complex cooling systems. The woofer cones have been specially developed to withstand the
demanding environment created by the high acoustic loading inside the EX1.5 chambers. The EX1.5 was designed
using new concepts in twin asymmetrical acoustic chambers that deliver very high speaker loading and output from
a relatively small cabinet footprint. It is ideal for use in live applications that require reproduction of low frequencies
with very high transient content at high output levels.
Enclosure Design
There are two industrial grade, internal braces placed at the top of the cabinet. Each brace is held in place by four M8
bolt and feature two M10 hang points providing a wide range of installation and suspension exibility. There is also a
pole mount "top hat" located on the top side of the cabinet.
14
EX1.5 · Overview

EX1.5 · AC Power Requirements
AC Power
The EX1.5 is an advanced self-powered loudspeaker system with on-board amplication and control systems.
Understanding power distribution, voltage and current requirements, as well as electrical safety issues, is critical
to the safe operation of the EX1.5.
The EX1.5 uses a PowerCon 3-pole AC main system with locking connectors to prevent accidental disconnection.
The main AC connector (blue) serves as the power input.
The EX1.5 operates in either 115V or 230V modes. Although pre-congured at the factory, the unit's operating voltage
mode can be changed in the eld.
Voltage Requirements
The EX1.5 operates safely and without audio discontinuity if the AC voltage stays within the operating window
of 100V-130V in 115V mode and 200V-250V when working in 230V mode, at 50 or 60Hz.
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.
If the voltage drops below the low boundary of its safe operating range, the loudspeaker will shut down if the voltage
does not rise above the low boundary before storage circuits are depleted. How long the loudspeaker will continue to
function during brownout depends on the amount of voltage drop and the audio source level during the drop.
If the voltage increases above the upper boundary of the range, the power supply can be damaged.
It is recommended that the voltage supply be within the rated voltage window. This ensures that AC voltage
variations from the service entry-or peak voltage drops due to cable runs-do not cause the amplier to cycle on
and o or cause damage to the power supply.
For best performance, the AC cable voltage drop should not exceed 10 volts, or 10 percent at 115 volts
and 5 percent at 230 volts.
Make sure that even with the AC voltage drop, the AC voltage always stays within recommended operating ranges.
The minimum electrical service amperage required by a EX1.5 system is the sum of each loudspeaker's maximum
continuous rms current. An additional 50 percent above the minimum amperage is recommended to prevent peak
volt-age drops at the service entry.
The Power Connector
The EX1.5 requires a grounded outlet. It is very important that the loudspeaker AC supply be properly grounded
in order to operate safely and correctly. Use the PowerCon AC cable-wiring diagram on page 16 to create international
or special-purpose power connectors:
Power connector assembly
15
EX1.5 · AC Power Requirements

EX1.5 · AC Power Requirements
Current Draw 115V Mode 230V
Max Long Term Continuous 4A rms 2A rms
Burst Current 8A rms 4A rms
Short Term Peak 20A peak 10A peak
Current Requirements
Each EX1.5 requires approximately 10 Amps max at 115V AC for proper operation. This allows one EX1.5 to be powered
from one 15 A breaker at 115 V and up to 2 subwoofers at 230 V.
The EX1.5 presents a dynamic load to the AC mains, which causes the amount of current to uctuate depending on
quiet or loud operating levels. Since dierent cables and circuit breakers heat up at varying rates, it is essential to
understand the types of current ratings and how they correspond to circuit breaker and cable specications.
The maximum long-term continuous current consumption is the maximum rms current during a period of at least ten
seconds. It is used to calculate the temperature rise in cables, in order to select a cable size and gauge that conforms to
electrical code standards. It is also used to select the rating for slowreacting thermal breakers.
The burst current consumption is the maximum rms current during a period of approximately one second, used to
select the rating of most magnetic breakers and to calculate the peak voltage drop in long AC cables according to the
formula: V pk (drop)= I pk x R (cable total).
The ultimate short-term peak current is used to select the rating of fast reacting magnetic breakers. Use the table
below as a guide when selecting cable gauge size and circuit breaker ratings for your operating voltage.
AC Cable Color Coding
If the colors referred to in the diagram don't correspond to the terminals in your plug, use the following guidelines:
Connect the blue wire to the terminal marked with a N or colored black. Connect the brown wire to the terminal marked with
a L or colored red. Connect the green and yellow wire to the terminal marked with a E or colored green or green and yellow.
Power cable color coding
The EX1.5 requires a ground connection. Always use a grounded outlet and plug.
16
EX1.5 · AC Power Requirements

EX1.5 · Audio Signal
The EX1.5 Control Panel
The EX1.5 features an easy to use rear control panel featuring audio input and output connections, level control, LED
status lights and a low pass lter that can be engaged when the loudspeaker is used as a stage monitoring device.
EX1.5 Rear panel
Audio Input and Output
The EX1.5 uses balanced, female XLR connectors for audio signal input, and a male XLR connector to provide through
output signal. The EX1.5 features Left and Right stereo inputs and outputs allowing the product to be integrated into
stereo systems that require one subwoofer.
The EX1.5 also features Left and Right High Pass Outputs that can be used to provide audio signal to full range
speakers being used in conjunction with the EX1.5. The high pass lter provides a crossover point of 125Hz.
The through output connector, wired in parallel to the audio input, will continue to provide the input signal if the EX1.5
is turned o. The audio input circuit presents a 20 kOhm balanced input impedance to a three-pin XLR connector with
the following connectors:
Main input Through output
Pin 1 - Ground
Pin 2 - Signal (+)
Pin 3 - Signal (-)
Case - Earth (AC) ground and chassis
Audio signal can be daisy-chained using the through output connector on the input panel. A single source can drive
multiple EX1.5 subwoofers with a paralleled input loop. If you are driving multiple EX1.5's in an array, make certain that
the source device can drive the total load impedance presented by the paralleled input circuit of the array.
Most source equipment is safe for driving loads no smaller than 10 times the source's output impedance. For
example, cascading an array of 10 units consisting of EX1.5 subwoofers produces an input impedance of 2000
ohms (20kOhms divided by 10). The source equipment should have output impedance of 200 ohms or less. This
is also true when connecting EX1.5's in parallel (loop out) with other KV2 Audio ampliers, active speakers and
subwoofers.
If the loudspeaker produces noises such as hiss and popping, disconnect the audio cable from the loudspeaker,
if the noise stops, then most likely the problem is not with the loudspeaker. Check the audio cable, source, and
AC power for the source of the problem.
Ensure that all cabling carrying signal to multiple ampliers and active speaker systems is wired correctly. Make
sure that the polarity has not been reversed. Reversed polarity can cause severe degradation in frequency
response and can also impact the dispersion characteristics of the speaker.
EX1.5 Rear panel
17
EX1.5 · Audio Signal

EX1.5 · Audio Signal
Ampliers and Acoustic Filters
A power amplier specically designed and optimized for the low frequency woofer powers the EX1.5 . The control
system in the EX1.5 processes the audio signal through a series of electronic lters and circuits providing equalization,
crossover lters, thermal and overdrive protection.
LED Status Lights
The EX1.5 control panel uses three distinct LED's to provide operating status information.
Power On / Thermal LED
This LED turns green when the speaker is turned ON. The light will continue to be green during normal operation
of the speaker system. The LED will change from green to yellow under a thermal condition resulting from
overheating of the amplier system. Under this condition, the speaker system will shut down. You can expect for the
system to be down for at least 2-3 minutes depending the ambient temperature and whether the system is being
exposed to direct sun light.
Signal
There are individual LED's for each the Left and Right signal inputs. The LED turns green when there is audio signal
present in the EX1.5. This signal indicator can be used to troubleshoot wiring problems.
Limiter
There are individual LED’s for each the Left and Right signal inputs. The LED turns green when there is audio signal
present in the EX1.5. This signal indicator can be used to troubleshoot wiring problems.
Please contact KV2 Audio or a local service representative should the system enter a thermal condition under
normal operating conditions.
Phase Switch
The EX1.5 features a phase switch that changes the phase of the high pass audio output signal. Changing the phase
of the output signal serves as a tool for integrating the full range cabinet and the subwoofer into challenging audio
environments. We recommend using a suitable measuring device for performing relevant measurements and
determining whether the phase should be reversed.
Level Control
The EX1.5 features a rotary control knob providing adjustment of the audio level. The operational range of the control
is –6dB to +6dB.
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EX1.5 · Audio Signal

EX1.5 · Specications
Specications
EX1.5 · Specications
19
System Acoustic Perfomance
Max SPL Long-term 127dB
Max SPL Peak 133dB
-3dB Response 38Hz to 120Hz
-10dB Response 34Hz to 120Hz
Crossover Point 120Hz
Low Frequency Section
Acoustic Design Front Loaded, Bass Reex
Woofer Size / Voice Coil Diameter / Design 15" / 3" / Inside Outside
Magnet Type Neodymium
Diaphragm Material Epoxy Reinforced Cellulose
Protection RMS Limiter
Low Frequency Amplier Specication
Type High eciency, Low frequency, Current-enhancing
switch mode
Rated Continuous Power 500W
Distortion <0.05%
Signal Input
Input Sensitivity 1.0V RMS
Input Impedance 20kΩ (balanced)
Power Requirements
Power Connector Neutrik PowerCon®
Operating Voltage 115V / 230V
Operating Voltage Range 100 to 120V@60Hz | 205 to 250V@50Hz
Recommended Amperage 4A 115V | 2A 230V
Cabinet
Cabinet Material Baltic birch
Handles 2
Pole Mount M20
Color "Orange peeled" Matt Black or any RAL
Physical Dimensions
Height 510 mm (20.08")
Width 550 mm (21.65")
Depth 570 mm (22.44")
Weight 43kg (94,8 lbs)

EX1.5 · Drawings
Drawings
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EX1.5 · Drawings