HOW TO USE THIS MANUAL
As you read this manual, you’ll find figures and dia-
grams to help you understand and visualize 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.
Icons used include:
“NOTE”
identifies an impor-
tant or useful piece of infor-
mation relating to the topic under
discussion.
“TIP”
offers a helpful tip
relevant to the topic at
hand.
“CAUTION”
gives
notice that an action can
have serious consequences and
could cause harm to equipment
or personnel, delays, or other
problems.
Introducing the EX12
The EX12 is a 2-way high
output, active, compact, full-
range speaker system. Design
objectives for the EX12 were
focused on the expansion of KV2
Audio’s primary philosophy of
speakers systems with increased
dynamic range, very high output
and a consistent sound character
no matter what the output level. The EX12 sets new
levels of performance for compact cabinets achieved
through the integration of new amplifier, transducer and
electronic control technologies that are closely tied to a
passion for taking performance to the next level.
Electronics
Amplifier power, electronic crossovers, phase align-
ment, equalization, time correction and speaker protec-
tion are integrated into the EX12’s amplifier module.
On-board electronics ensures fast, easy set up and
complete control. An improved version of KV2 Audio’s
switch mode, current enhancing low frequency amplifi-
er has been developed for the EX12. The new configu -
ration improves overall system efficiency and increases
output allowing passive radiation of heat to take place
through a unique “fin-less” heat sink that can be placed
in any position or direction. This ensures cool opera-
tion in horizontal or vertical applications. Additionally,
the EX12 amplifier unit contains an internally located
electric fan that is operated by a temperature sensing
circuit which will slowly bring the fan online as required
in extreme, high temperature situations.
Months of research were invested into designing
circuitry that ensures that the extreme dynamic range
exemplified by the speaker system is maintained even
under clipping conditions. The real test of the EX12 ’s
limits is when it is exposed to the rigors and demands
of live audio playback where consistent clipping of
amplifiers, generation of distortion artifacts, dramatic
increases in the floor and the elimination of dynamic
range put the product to an extreme test.
The EX12’s high frequency compression driver is
powered and controlled by KV2 Audio’s standard
low intermodulation distortion, Class A/B, push-pull,
high and mid frequency amplifier design. Metal Oxide
Silicon Field Effect Transistors (MOSFET) are used for
the output stage and the compression driver coupled
through a transformer balanced speaker output. The
entire performance strategy for this type of design is
based on producing the lowest intermodulation distor-
tion possible and the highest audio quality in the critical
mid and high operating bands.
INTRODUCTION
EX12 USER’S GUIDE
P. 3
