Atlantic Technology IWTS-155 User Manual

Instruction Manual

IWTS-155 LCR Speakers

In-Wall THX Ultra2 Theater System Speakers

2

Safety Precautions

Safety Precautions

IWTS-155 LCR In-Wall THX Ultra2 Theater System Speakers

Table of Contents

2 Model IWTS-155 LCR
3 Important Considerations Before Installation

3 Recommended Wire Sizes
3 Location Considerations
3 Room Acoustics

3 Speaker Placement

3 Stereo Music Listening
4 Home Theater Systems

5 Mounting the IWTS-155 Speakers
5 Installation of the IWTS-155 in New Construction

with Optional Back Box

5 Installation of the IWTS-155 in Existing Construction

without Optional Back Box

5 Removing and Installing the Grille
5 Cutting the Opening
6 Installing the Mounting Frame
6 Painting the Speaker Assembly
6 Speaker Connection and Assembly
6 Installing the Speaker Enclosure Into the Frame

7 Front Panel Controls

7 HF (High Frequency) Level Control
7 Boundary Compensation Control
7 Directional Vector Control™
7 IR Knockout

7 Specifications

Model IWTS-155 LCR

In Wall THX Ultra2 Theater System
Speakers

Thank you for purchasing Atlantic Technology products. Our speaker sys­tems have been designed to deliver exceptional sound and value. We hope
you like what you hear from them, and are happy with your decision to
buy them.

Please take a few moments to read these instructions. They’re intended not
only to tell you how to mount the speakers, but how to get the best perfor­mance from them.

What’s THX?

THX is a series of standards and technologies originally developed by
LucasFilm Ltd. (of Star Wars fame) and now an entity unto itself. These
technologies and standards are intended to ensure that what you hear and
see on your A/V system, as closely as possible, matches what the director/
artist/engineer heard and saw during the final mixing of the source mate­rial. THX standards are intended to enhance every type of viewing and
listening experience including the latest discrete multi-channel digital for­mats. Please note however that, although there is proprietary THX electronic
processing, THX is not a surround format.

THX Ultra2 standards are based on a 3000 cubic foot room (L x W x H =
cu. ft.). This does not mean Ultra2 certified components must be used in
rooms this exact size. The room sizes simply provide a frame of reference,
as the standards specify that the system must deliver certain performance
minimums (volume, frequency response, etc.) in the specified space. For
more information, see the THX website at www.thx.com.

For Future Reference

Record your serial numbers and date of purchase here:

Model Number

Serial Number

Date of Purchase

The serial number is found on the back panel.

Copyright © 2009 Atlantic Technology International.

Specifications are those in effect at the time of printing. Atlantic Technology reserves the
right to change specifications or designs at any time without notice.

3

Instruction Manual

Speaker Placement

Important Considerations Before
Installation

Recommended Wire Sizes

The longer the wire run, the heavier the wire should be. Use the following
recommendations as a guide for your installation. And if you’re in doubt,
remember that it never hurts to get the next heavier grade of wire. Also note
that lower gauge numbers equal heavier wire sizes.

Wire Run Wire Gauge:

<15 ft. 16 ga.
15 to 30 ft. 14 ga.
>30 to 50 ft. 12 ga.

Location Considerations

A major determinant of any speaker’s sound quality is its location in the
room. With in-wall speakers there are fewer placement options than with
free-standing speakers, so giving some thought to location can really pay
off. Our In-Wall Theater Systems have been designed to minimize the det­rimental effects wall mounting can have on sound, so they sound better
than conventional in-wall speakers.

Room Acoustics

Hard surfaces create lots of sound reflections in the room while soft surfaces
tend to absorb sound. Note the speakers’ location in terms of proximity to
glass and other highly sound reflective or absorptive surfaces. A simple set
of curtains or an area rug can make a major difference in sound quality and
intelligibility by reducing excessive reflections.

Speaker Placement

For all the following situations, it’s recommended that you first place small
box speakers in the proposed locations, just to get a good idea of how
that location will sound. In-wall speakers are tough to move once they’re
installed!

For all the following placement instructions, it’s important to bear in mind
that for aesthetic considerations, many people prefer to mount their in-wall
speakers well above seated ear level, as doing so minimizes the speakers’
visual intrusion on the room.

The IWTS-155 LCR uses Atlantic's renowned 1" soft-dome Low Reso­nance Tweeter (LRT™). Because of its low crossover point, this remarkable
tweeter allows the IWTS-155 LCR to deliver much wider midrange disper­sion than conventional in-wall speakers for greater placement flexibility,
without the severe acoustic and mechanical drawbacks of the so-called
"pivoting tweeter."

Stereo Music Listening

For stereo music reproduction, place the speakers at approximately ear
level when seated, with both speakers on the same wall facing the prime
listening location. A separation of approximately 6 to 8 feet between the
left and right speakers is usually good. Ideally, the distance between the
two speakers will be close to the same as the distance from the speakers to
the listening position.