Infinity BU2 User Manual

1
Powered Subwoofer BU2
BU2 SPECIFICATIONS
Driver ................12"Woofer
Nominal Impedance ............4Ω
Enclosure Design.............Tuned Port
Amplifier Power .............100watts RMS
Frequency Response ...........30Hz-150Hz(±3dB)
Crossover Frequency ...........50to200HzContinuously Variable
Inputs
Line Level ...............RCAjacks
High Level ...............(Speaker) Input terminals
Outputs................Full range Speaker
Sensitivity
Low Level ...............70mV
High level ...............1.7V
Input Impedance
Low Level ...............12KΩ
High level ...............4.7KΩ
Auto-Off Delay .............8minutes
Dimensions
Inches ................14½x14½x14½"
Metric ................36.8 x 36.8 x 36.8cm
plus 1¼" (32mm) for feet
Shipping Weight .............43lbs/19.5 Kg.
Occasional refinements may be made to existing products without notice, but will always meet or
exceed original specifications unless otherwise stated.
TABLE OF CONTENTS
BU2 SPECIFICATIONS .................................................1
TABLE OF CONTENTS.................................................1
BU2 CONTROLS AND THEIR FUNCTION ..................2
BU2 TEST PROCEDURE..............................................3
BLOCK DIAGRAM .........................................................4
BU2 CABINET EXPLODED VIEW ................................5
AMPLIFIER EXPLODED VIEW .....................................6
BU2 MECHANICAL PARTS LIST .................................7
BU2 ELECTRICAL PARTS LISTS ................................8
BU2 PACKAGING EXPLODED VIEW ........................10
INTEGRATED CIRCUIT DIAGRAMS..........................11
PCB (TOP VIEW, component side).............................12
PCB (BOTTOM VIEW, solder side).............................13
PREAMP/CROSSOVER SCHEMATIC 120V ..............14
AMPLIFIER SCHEMATIC 120V ..................................15
PREAMP/CROSSOVER SCHEMATIC 230V ..............16
AMPLIFIER SCHEMATIC 230V ..................................17
THIS MANUAL IS FOR THE BU2 REVISION WITHOUT AN EXTERNAL POWER SWITCH
(120v Only - 230v version has a power switch)

Infinity BU2 Specifications

General

Brand	Infinity
Model	BU2
Category	Subwoofer
Language	English