Infinity Interlude Series User manual

Interlude Series

IL120s Subwoofer

Service Manual

Infinity Systems, Inc

250 Crossways Park Dr.

Woodbury, New York 11797 REV 1 10/2001

IL120s

CONTENTS

SPECIFICATIONS …….…………………………….………………….3

DETAILED SPECIFICATIONS ……………………..…………………4

CONTROLS and CONNECTIONS ………………….….….…………6

OPERATION……………………………………..……..…..…….……..8

BASS OPTIMIZATION SYSTEM…………….………….….…………9

MECHANICAL/PACKING PARTS LIST………………..……………11

EXPLODED VIEW ……………………………………….……………12

PACKAGING …………………………….………………………….…13

EXPLODED VIEW OF AMPLIFIER…………………….……………14

TEST SETUP and PROCEDURE……………….……..……………15

IL120s ADJUST BIAS PROCEDURE………………..…………………16

PRINTED CIRCUIT BOARD DIAGRAMS………………..…………17

ELECTRICAL PARTS LIST (120v)…………………….….…………23

INTEGRATED CIRCUIT DIAGRAMS ………………………………31

IL120s SCHEMATICS…………..……….……………………………32

IL120s

SPECIFICATIONS

IL120s Frequency Response: 28Hz - 150Hz (±3dB)

Maximum Amplifier Output: 500 watts (20Hz - 150Hz with no more than 0.1% THD)

Crossover Frequencies: 50Hz - 150Hz, 24dB/octave, continuously variable

Driver: 12" C.M.M.D.

Dimensions (H x W x D): 17-1/2" x 17-1/4" x 19-3/4"

Weight: 45 lb (20.5kg)

Optional Accessory: Bass Optimization

Test & Measurement Kit:

Part Number: 335852-002

DETAILED SPECIFICATIONS

IL120s

DETAILED SPECIFICATIONS (Cont.)

IL120s

CONTROL and CONNECTIONS

IL120s

CONNECTIONS

IL120s

OPERATION

IL120s

BASS OPTIMIZATION SYSTEMTM

IL120s

BASS OPTIMIZATION SYSTEMTM (Cont.)

plays the tones from the test CD and records the relative output level of each test tone, using the sound-level meter,

on the provided measurement template. After all the tones are complete, the template contains a response curve

for the frequencies below 100Hz. The user simply notes the frequency of the largest bass peak, calculates the cor-

rect amount of attenuation, and uses the “Q-Finder” to determine the width of the curve. These three values are

dialed into the Bass Optimization System controls located on the speaker. The entire process takes less than twen-

ty minutes.

If your dealer does not stock the Bass Optimization System test and measurement kit, you may purchase it directly

from Infinity. U.S. residents can visit our Web site at www.infinitysystems.com or call 1-800-553-3332. Canadian

residents should contact their dealer or call 1-800-567-3275.

Ask for Infinity part number 335852-002.

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