Infinity INTERMEZZO 1.2s User manual

INTERMEZZO
1.2s Subwoofer
Service Manual
Infinity Systems, Inc
250 Crossways Park Dr.
Woodbury, New York 797
REV 45/2005

INTERMEZZO1.2s
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 INF2001-04…………………………………….…………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
0
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.