Infinity Infinity Alpha 25ES Manuel utilisateur

Owner’s Guide

•InfinityAlpha 25ES

SPEAKER SYSTEMS

2InfinityAlpha 25ES

InfinityAlpha™Series

The InfinityAlpha Series of loudspeakers continues Infinity’s

long-standing commitment to accurate sound reproduction.Our

patented Ceramic Metal Matrix Diaphragm™(C.M.M.D.™) drivers,

precision dividing networks and rigid,heavily braced enclosures

combine to deliver uncompromised performance in any stereo or

multichannel home theater system.The InfinityAlpha 25ES is the

perfect loudspeaker to complete any home theater system.

Unpacking the Speaker

If you suspect damage from transit,report it immediately to

your dealer. Keep the shipping carton and packing materials

for future use.

Choosing Proper Placement and Setup

The InfinityAlpha 25ES surround speaker can be used in side or

rear channel applications.Please refer to the placement and

setup method for your application.The first step is to determine

the application for which your InfinityAlpha 25ES surround

speaker will be used.

If you are using the InfinityAlpha 25ES for surround channels in

a 5-channel home theater system or for side channels in a 6- or

7-channel home theater system (Application 1),please follow the

directions below.

If you are using the InfinityAlpha 25ES as a rear speaker in a

6- or 7-channel home theater system (Application 2),please

follow the directions on page 3.

Placement (Application 1)

When using the InfinityAlpha 25ES for surround channels in a

5-channel home theater system or for side channels in a 6-

or 7-channel home theater system,refer to Figures 1 and 2.

The speakers should be placed perpendicular to or slightly

behind the primary listening location,as shown.

PLANNING YOUR SYSTEM

Couch

Left

Front

Channel

Left

Surround

Channel

Right

Surround

Channel

Right

Front

Channel

Center

Channel

Infinity

Subwoofer

(optional)

Couch

Left

Front

Channel

Left

Surround

Channel

Right

Surround

Channel

Right

Front

Channel

Center

Channel

Infinity

Subwoofer

(optional)

FIGURE 2

FIGURE 1–This overhead view shows a typical

home theater plan.

InfinityAlpha 25ES

Setting the Surround Configuration Selector

It is generally recommended that the selectable surround mode

configuration be set to Bipole.This will provide a large ambient

surround sound field while allowing for precise localization of

sound effects that the filmmaker has placed in the surround

tracks.

If the side walls on which the speaker will be mounted are more

than about 14' from the listening position,setting the Surround

Mode Configuration Switch to Monopole may offer improved

performance.It is also recommended that the Monopole position

be selected if the speakers will be mounted close to a corner,as

shown in Figure 2.

If you are using a receiver/processor with aTHX®surround mode

and have selected theTHX surround mode,it may be beneficial to

use the Dipole setting. This is a matter of personal preference

and may change depending on the individual film soundtrack.It

is also recommended that the Dipole setting be used with older

recordings that are only recorded with a Dolby* Pro Logic* (not

the newer Dolby Digital) soundtrack.

IMPORTANT NOTE:The set of drivers that the arrow in Figure 3

points to should be installed toward the front of the room.It does

not matter whether or not the tweeter is positioned above or

below the woofer.

This will ensure proper operation and performance should the

Monopole or Dipole position on the surround mode configuration

switch be selected.

–Surround mode configuration switch.

BIPOLEDIPOLE

MONOPOLE

FIGURE 3

Placement (Application 2)

When using the InfinityAlpha 25ES as a rear speaker in a 6-

or 7-channel home theater system,refer to Figures 4 and 5.

The speaker(s) should be mounted on the rear wall facing the

listening area,between the side channel speakers.If you are

using one rear speaker,it should be mounted as close as

possible to the center of the listening area.When using two

rear speakers,they should be spaced evenly within the width

of the listening area.

Setting the Surround Configuration Selector

When used as a rear channel speaker in a 6- or 7-channel

system,it is recommended that the Surround Mode Configuration

Switch be set to Bipole,as shown in Figure 6.

Couch

Left

Front

Channel

Left

Side

Channel

Right

Side

Channel

Rear Center Channel

Right

Front

Channel

Center

Channel

Infinity

Subwoofer

(optional)

Couch

Left

Front

Channel

Left

Side

Channel

Left Rear Channel Right Rear Channel

Right

Side

Channel

Right

Front

Channel

Center

Channel

Infinity

Subwoofer

(optional)

FIGURE 4–This overhead view shows a typical home

theater plan with a single rear-center surround channel.

FIGURE 5–This overhead view shows a typical home

theater plan when using two rear-channel speakers.

–Surround mode configuration switch.

BIPOLEDIPOLE

MONOPOLE

FIGURE 6

4InfinityAlpha 25ES

WALL-MOUNTING

The InfinityAlpha 25ES speaker is designed to mount directly to a

wall.Each speaker has (4) keyholes in the rear to allow either

left- or right-side placement.Each speaker will require (2)

1-1/2,"#8 wood screws fastened to a wall stud.If a wall stud is

unavailable,install an anchor appropriate for a 1-1/2,"#8 screw.

Use the supplied template to accurately position the screws on the

wall and refer to the diagrams for more assistance.

NOTE:The customer is responsible for the correct selection and

use of mounting hardware (available through hardware stores)

that will ensure the proper and safe wall-mounting of the

speakers.

Step 1.

Position the supplied wall-mount template on the wall in the

desired speaker location.Make two markings per speaker.

Step 2.

Fasten (2) 1-1/2,"#8 wood screws to the wall using the markings

placed in Step 1 as your guide.Leave a 3/16" space between

the wall and screwhead.If a wall stud is not available,use an

appropriate anchor.

Step 3.

Attach speaker wire,as shown on page 5.

Step 4.

Place the speaker on the wall by aligning the upper two keyholes

on the back of the speaker to the screwheads on the wall.Once

positioned properly,the speaker should slide down slightly and

become secure.

6-5/8"

3-5/16"

14-1/2"

Nominal Inpedance: 8 ohms

Serial:

Infinity Systems, Inc.

Northridge, California

A Harman International Company

Alpha25es

Designed and Engineered by Infinity

Assembled in Mexico

IMPORTANT NOTE:The set of drivers that the arrow in Figure 3

points to should be installed toward the front of the room.It does

not matter whether or not the tweeter is positioned above or

below the woofer.

This will ensure proper operation and performance should the

Monopole or Dipole position on the surround mode configuration

switch be selected.

FIGURE 7

InfinityAlpha 25ES

WIRING THE SYSTEM

IMPORTANT: Make sure all equipment is turned off before making

any connections.

For speaker connections,use a minimum #16-gauge speaker

wire with polarity coding.The side of the wire with a ridge or

other coding is usually considered positive polarity (i.e.,+).

Heavier-gauge wire should be used when more than 50 feet of

speaker wire is required.The wire channels on the rear of the

InfinityAlpha 25ES will accommodate most types of 14- to 18-

gauge wire.

NOTE: If desired,consult your local Infinity dealer about speaker

wire and connection options.

The speakers have coded terminals that accept a variety of wire

connectors.The most common connection is shown in Figure 8.

To ensure proper polarity,connect each +terminal on the back

of the amplifier or receiver to the respective +(red) terminal on

each speaker,as shown in Figure 9.Connect the –(black)

terminals in a similar way.See the owner’s guides that were

included with your amplifier or receiver to confirm connection

procedures.

IMPORTANT: Do not reverse polarities (i.e.,+ to –or –to +)

when making connections.Doing so will cause poor imaging and

diminished bass response.

NOTE: Banana plugs will protrude past the speaker enclosure,

requiring a small cutout in the wall behind the speaker. Speaker

wire may be run through this hole as well.

—

Receiver or

Amplifier

(rear view)

Speaker (rear view)

(one channel shown)

—

REDBLACK

LOOSEN TERMINALS

INSERT BARE END;

TIGHTEN TERMINALS

BLACK = –

NO STRIPE = –STRIPE = +

RED = +

FIGURE 8–This example shows how to connect bare wires to

the terminals.Banana plugs may also be inserted directly into

the rear of the connector.

FIGURE 9–Wiring diagram shows polarity connections for

one channel.

6InfinityAlpha 25ES

Check the speakers for playback first by setting the system

volume control to a minimum level,and then by applying power to

your audio system.Play a favorite music or video segment and

increase the system volume control to a comfortable level.

NOTE:You should hear balanced audio reproduction across the

entire frequency spectrum.If not,check all wiring connections or

consult the authorized Infinity dealer from whom you purchased

the system for more help.

When the InfinityAlpha 25ES speakers are used as part of a

Dolby Digital or DTS®multichannel home theater system with a

powered subwoofer,it is recommended that you set your receiver/

processor speaker mode to“small”or“high-pass”for all

channels connected to an InfinityAlpha 25ES.In addition,some

receivers/processors allow you to adjust the high-pass frequency

for the“small”or“high-pass”setting.If your receiver/processor

has this capability,it is recommended that you set the high-

pass frequency to the lowest setting above 70Hz.Consult your

receiver/processor manual for more information about these

adjustments.

The placement and setup instructions in this manual are written

in general terms to cover most typical installations.We realize

that each room is different and that your specific installation may

require some modification to these guidelines.You can be sure

that if you need to install the speakers outside the guidelines in

the manual,they will still deliver excellent sound with any music

or film soundtrack.

Feel free to experiment with the Surround Mode Selector Switch

to determine the best settings in your room with your system.

FINAL ADJUSTMENTS CARE OF YOUR SPEAKER SYSTEM

The InfinityAlpha 25ES does not require any routine

maintenance.When needed,use a soft cloth,dampened

with water only,to remove any fingerprints or dust.

Clean the grille by gently vacuuming.

NOTE: Do not use any cleaning products or polishes on the

cabinet or grille.

InfinityAlpha 25ES

Declaration of Conformity

We,Harman Consumer International

2, route de Tours

72500 Chateau-du-Loir

France

declare in own responsibility, that the product described in this owner’s

manual is in compliance with technical standards:

EN 50081-1:1992

EN 50082-1:1992

Robin Marshall

Harman Consumer International

Chateau-du-Loir, France. 9/02

Infinity continually strives to update and improve existing products,as well as

create new ones.The specifications and construction details in this and

related Infinity publications are therefore subject to change without notice.

SPECIFICATIONS

InfinityAlpha 25ES

Frequency Range (± 3dB) 60Hz – 22kHz

Recommended 10 – 125 watts

Amplifier Power Range

Sensitivity 87dB

(2.83V @ 1 meter)

Nominal Impedance 8 ohms

Crossover Frequency 2,500Hz;24dB/octave

Low-Frequency Drivers Dual 5-1/4" (133mm)

High-Frequency Driver(s) Dual 1" (25mm) C.M.M.D.

Dimensions H 14-1/2" (368mm)

W14-1/8" (359mm)

D7" (178mm)

Weight 18 lb (8.2kg)

Grille Black cloth

(white cloth on white model)

250 Crossways Park Drive,Woodbury,NY 11797 USA 800.553.3332 (USA Only)

www.infinitysystems.com

Infinity is a registered trademark,and Ceramic Metal Matrix Diaphragm (C.M.M.D.) is a trademark,of Harman International Industries,Incorporated.

*Trademarks of Dolby Laboratories.DTS is a registered trademark of DigitalTheater Systems,Inc.

Ceramic Metal Matrix Diaphragm (C.M.M.D.) patent nos.6,327,372 and 6,404,897.

Printed in USA 9/02 Part No.335833-001

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