Infinity Alpha 37c User manual

Owner’s Guide
•Alpha 37c
ALPHA™SPEAKER SYSTEM

2ALPHA 37c
InfinityAlpha™Series
TheAlpha Series of loudspeakers continues Infinity’s
longstanding 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.TheAlpha 37c
is the perfect center channel loudspeaker to complete any home
theater system.
If you suspect damage from transit,report it immediately to
your dealer.Keep the shipping carton and packing materials
for future use.
Placement
For best results,theAlpha 37c should be placed on top
of,or directly below,the television and aimed toward the
listening area (see Figure 1).
The terminal cup has an adjustable foot to angle the speaker
toward the listening position (see Figure 2).
An Important Note for Proper Installation
The InfinityAlpha 37c is magnetically shielded.When placing it
directly on top of a television,please follow the simple installation
guidelines below to prevent any interference with your television
picture.
1. Turn off theTV that the speaker will be placed on top of.
2. While keeping the front of the speaker facing forward,lift and
place theAlpha 37c on top of theTV.
3. Connect the speaker as described in this owner’s guide.
4. You may now turn on theTV.
UNPACKING THE SPEAKER
PLANNING YOUR SYSTEM
Couch
Left
Front
Channel
Left
Surround
Channel
Right
Surround
Channel
Right
Front
Channel
Center
Channel
Infinity
Subwoofer
(optional)
FIGURE 1– This overhead view shows a typical
home theater plan.
FIGURE 2
– +
INPUT
INPUT
– +
– +
INPUT
Loosen thumbscrew.
Slide rod down
the desired amount.
Tighten thumbscrew.

3
ALPHA 37c
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.,+).
NOTE: If desired,consult your local Infinity dealer about speaker
wire and connection options.
To ensure proper polarity,connect each +terminal on the back
of the amplifier,receiver or television to the respective +(red)
terminal on each speaker,as shown in Figure 3.Similarly,
connect the –(black) terminals in the same way.Also,see the
owner’s guides that were included with your amplifier or
receiver to confirm connection procedures.
WIRING THE SYSTEM
Red = +
Black = –
❶Loosen Terminal
❷ Insert
Bare End;
Tighten Terminal
Speaker Wire
Marking = +No Marking = –
Receiver or
Amplifier
(rear view)
Alpha Center
redblack
(one channel shown)
+
–
-
+
FINAL ADJUSTMENTS
CARE OF YOUR SPEAKER
FIGURE 3
TheAlpha 37c
features
color-coded
terminals.This
example shows the
most common way
of connecting
speaker wire by
directly inserting
into terminals.
FIGURE 4– Wiring diagram shows polarity connections for
one channel of a stereo or home theater system.
IMPORTANT:DO NOT reverse polarities (i.e.,+ to – or – to +)
when making connections.Doing so will cause poor imaging and
diminished bass response.
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.Following the directions provided with your
receiver/processor,adjust the center channel volume so that it
matches the output of the left and right speakers.
TheAlpha 37c’s enclosure has a wood-vinyl finish that 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 gentle vacuuming.
NOTE: Do not use any cleaning products or polishes on the
enclosure or grille.

Alpha 37c
Frequency Range: 45Hz – 22,000Hz (±3dB)
RecommendedAmplifier Power Range: 10 – 150 watts
Sensitivity (2.83V @ 1 meter):91dB spl
Nominal Impedance: 8Ω
Crossover Frequency: 500Hz,3000Hz;24dB/octave
Low-Frequency Drivers: Dual 6-1/2" (165mm) C.M.M.D.,magnetically shielded
Mid-Frequency Driver: 5-1/4" (133mm) C.M.M.D.,magnetically shielded
High-Frequency Driver: 1" (25mm) C.M.M.D.,magnetically shielded
Dimensions (H xW x D):9" x 23"x 12-1/2"(229mm x 584mm x 318mm)
Weight: 32 lb (14.6kg)
SPECIFICATIONS
© 2002 Harman International Industries,Incorporated
250 Crossways Park Drive,Woodbury,NY 11797 USA 800.553.3332 (USA Only)
www.infinitysystems.com
Infinity is a registered trademark of Harman International Industries,Incorporated.
Ceramic Metal Matrix Diaphragm (C.M.M.D.) patent nos.6,327,372 and 6,404,897.
Printed in USA 9/02 Part No.350581-001
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 50082-1:1997
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.