Infinity IM4.1t, IL60, IM1.2s, IL50, IL100s User Manual
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INTERMEZZO
1.2s Subwoofer
Service Manual
Infinity Systems, Inc
250 Crossways Park Dr.
Woodbury, New York 11797
REV 4 5/2005
INTERM EZZO 1.2s
CONTENTS
SPECIFICATIONS ……………………………… ……… ……… ……. 3
DETAILED SPECIFICATIONS …………………….…………………4
CONTROLS and CONNECTIONS …………………….….…………6
OPERATION………………………..……………………….…………10
MECHANICAL/PACKAGING PARTS LIST…………………………11
EXPLODED VIEW of INTERMEZZO 1.2s …………………………12
PACKAGING …………………………….………………………….…13
TEST SET UP AND PROCEDURE …………………………………14
BULLETIN INF200 1- 04… ……… ……… ………………….…………15
IM 1.2s ADJUST BIAS PROCEDURE………………………………17
ELECTRICAL PARTS LIST ……………………………….…………18
PRINTED CIRCUIT BOARD DIAGRAMS………………..…………27
INTEGRATED CIRCUIT DIAGRAMS ………………………………34
SCHEMATICS…………………………………………………………35
2
INTERMEZZO 1.2s
3
Specifications
Frequency Response: 23Hz - 130Hz (±3dB)
30Hz - 130Hz (±1.5dB)
Subwoofer Amplifier Output: 850 watts continuous
(In to 89from 20Hz-100Hz with no
more than 0.1% THD)
2,600 watts peak
2nd- and 3rd- Order Harmonic Distortion: <1%
(20Hz - 130Hz, @ 95dB SPL)
Crossover Frequencies: 50Hz - 130Hz (continuously variable)
24dB/Octave
Dimensions (H x W x D): 15-1/4” x 18-1/4” x 13-3/4”
(387mm x 464mm x 349mm)
Weight: 60 lb (27.3kg)
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.
Detailed Specifications
INTERMEZZO 1.2s
4
INTERMEZZO 1.2s
5
Detailed Specifications (Cont.)
INTERMEZZO 1.2s
6
Controls and Connections
INTERMEZZO 1.2s
7
Controls and Connections (Cont.)
INTERMEZZO 1.2s
8
Controls and Connections (Cont.)
INTERMEZZO 1.2s
9
Controls and Connections (Cont.)
INTERMEZZO 1.2s
10
Operation
The operation of the Intermezzo1.2s subwoofer with regards to the proper settings for the Room Adaptive Bass
Optimization System, or R.A.B.O.S., is thoroughly covered in the Owner’s guide, part# 336204-001. For service
purposes, the R.A.B.O.S. system is canceled when all three front panel controls (F) (L) (W) are turned fully
Clockwise. The only other control of concern is the Main Level Control on the front panel, which is a traditional
potentiometer.
INTERMEZZO 1.2s
11
Mechanical/Packaging Parts List
Ref No. Description Part Number
MECHANICAL
1 GASKET, REAR 331106-001
2 12” Woofer C.M.M.D. Shielded, DCR 7.6 ohms ±10%, 335036-001
3 RABOS ASSEMBL Y 336202-001
4 SCREW, 8-32 x .5 BLK, MS,PPH (16) 900201-008
5 GRILLE CUP (14) 333249-003
6 Front BAFFLE 335270-001
7 SCREW, 6-32 x .5 BLK, MS,PPH (12) 900301-008
AMPLIFIER (NOT FOR SALE)
8 GRILLE (See options below) 335735-040
9 DÉCOR TRIM PANEL (See options below) 335739-030
PACKAGING
10 RABOS KIT 335852-002
11 FOOT PAD (4) 335459-001
12 POWER CORD (15 ft) 336658-115
13 TOP END PAD 336213-001
14 BOTTOM END PAD 336213-002
15 CARTON 336504-001
16 OWNERS MANUAL 336204-001
17 WARRANTY CARD 335841-001
18 SURVEY CARD 335868-002
Description Part Number
Grille, Warm Platinum 335735-040
Grille, Midnight Blue 335735-050
Grille, Rich Burgundy 335735-060
Décor Trim Panel, Black 335739-030
Décor Trim Panel, Cherry 335739-020
Décor Trim Panel, Maple 335739-010
INTERMEZZO 1.2s
12
Exploded View
1
2
3
(ROTATED)
4
5
7
GRILLE, WARM PLATINUM 335735-040
GRILLE, MIDNIGHT BLUE 335735-050
GRILLE, RICH BURGUNDY 335735-060
AMPLIFIER
(NOT FOR SALE)
INTERMEZZO 1.2S
CABINET
(NOT FOR SALE)
4
00446
6
DÉCOR TRIM PANEL, BLACK 335739-030
DÉCOR TRIM PANEL, CHER RY 335739-020
DÉCOR TRIM PANE, MAP LE 335739-010
9
8
REMOVE THESE
GRILLE CUPS
AND
SCREWS ONLY
TO SERVICE THE INTERMEZZO 1.2s
1) Remove the gr ille and side panel.
2) Extract (8) of the rubber grille retain e rs s h o wn in view A above; this can be accomplished by
carefully pulling them out of the cavities with long-nosed pliers or similar tool.
3) Rem ove the (8) P h illip s s c re ws that are n o w exposed.
4) Carefully lift the front baffle, with driver and RABOS controls attached, off the cabinet.
5) To se rv ic e the amplifier , re move the (8 ) p h illip s s c re ws at the rea r o f th e e n c lo s u re, and push
the amplifer assemby out the front.
A
SEE
VIEW
A
(REDUCED)
VIEW
INTERMEZZO 1.2s
13
Packaging View
16
18
17
11
8
9
13
10
12
14
00450
15
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