EX1.8
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
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USER’S GUIDE |
1 |
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CONTENTS |
2 |
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INTRODUCTION |
3 |
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HOW TO USE THIS MANUAL |
3 |
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Icons used include |
3 |
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Introducing the EX1.8 |
3 |
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Electronics |
3 |
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Acoustic Components |
4 |
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Enclosure Design |
4 |
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APPLICATIONS |
4 |
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AC POWER REQUIREMENTS |
4 |
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AC POWER |
4 |
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Voltage Requirements |
4 |
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The Power Connector |
5 |
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Current Requirements |
5 |
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AC Cable Color Coding |
5 |
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IMPORTANT SAFETY INSTRUCTIONS |
6 |
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SAFETY SUMMARY |
6 |
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EX1.8 CONTROL PANEL |
7 |
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REAR CONTROL PANEL |
7 |
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Audio Input and Output |
7 |
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Amplifiers and Acoustic Filters |
8 |
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LED Status Lights |
8 |
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Power On / Thermal LED |
8 |
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Signal |
8 |
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Limiter |
8 |
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Phase Switch |
8 |
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Level Control |
8 |
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EX1.8 DRAWING |
9 |
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EX1.8 SPECIFICATIONS |
10 |
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EX1.8 ACCESSORIES |
11 |
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EX1.8 USER’S GUIDE |
P. 2 |
INTRODUCTION
HOW TO USE THIS MANUAL
As you read this manual, you’ll find figures and diagrams 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 important or useful piece of information 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 EX1.8
The EX1.8 is a high output, active subwoofer system. Through the use of proprietary amplifier technology, a precision manufactured state of the art woofer component and the innovative implementation of a high efficiency, twin chamber acoustic design, the EX1.8 delivers tight, fast, controlled bass response at very high output levels. This system falls directly out of KV2 Audio’s philosophy to develop products with increased dynamic range, very high output and a consistent sound character no matter what the output level.
The system establishes new performance standards for an active powered subwoofer that can only be achieved through the integration of new amplifier topologies, transducer designs and electronic control technologies that are closely tied to a passion for taking performance to the next level.
The EX1.8 can be used in a variety of system applications. It can add high performance bass reproduction to active speaker systems such as KV2 Audio’s EX12 loudspeaker, or it can be easily used with passive speaker systems. The built in electronic high pass filter, phase and independent output level controls provide high precision, easy to use system integration circuitry.
Electronics
Amplifier power, electronic crossovers, equalization and speaker protection are integrated into the EX1.8’s amplifier 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 amplifier has been specially developed for the EX1.8 . The new design improves overall system efficiency to over 90% and delivers 1000 watts of continuous power.
KV2 Audio has developed an amplifier topology that possesses two unique characteristics that are critically important for high performance, active subwoofer systems. The EX1.8 amplifier topology delivers very high efficiency and generates minimal thermal losses allowing the amplifier 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 amplifier 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 amplifier technology, the EX1.8 amplifier provides extremely high efficiency with low losses and delivers the highest woofer control by delivering higher current levels under “phase shift” conditions.
The amplifier module is fitted onto a large format, finned, aluminum alloy heat sink providing high flow, passive cooling and eliminating standard maintenance cycles associated with forced cooled amplifier designs. The entire mechanical assembly is fitted on a mechanical suspension system that isolates low frequency energy and ensures long-term reliability.
EX1.8 USER’S GUIDE |
P. 3 |
AC POWER REQUIREMENTS
Acoustic Components
The EX1.8’s woofer technology is based around high efficiency, 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 EX1.8 chambers. The EX1.8 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 flexibility. There is also a pole mount “top hat” located on the top side of the cabinet.
APPLICATIONS
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AC POWER
The EX1.8 is an advanced self-powered loudspeaker system with on-board amplification and control systems. Understanding power distribution, voltage and current requirements, as well as electrical safety issues, is critical to the safe operation of the EX 1.8.
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Voltage Requirements
The EX1.8 operates safely and without audio disconti-
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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
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If the voltage increases above the upper boundary of the range, the power supply can be damaged.
NOTE: It is recommended that the voltage supply be within the rated voltage window.
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EX1.8 USER’S GUIDE |
P. 4 |
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