Infinity SUB450, TSS-450 Service Manual
SUB450
(TSS-450 SYSTEM)
SERVICE MANUAL
Infinity Systems Incorporated
250 Crossways Park Dr.
Woodbury, New York 11797 Rev3 8/2004
CONTENTS
BASIC SPECIFICATIONS . . . . . . . . . ………………….………….... .. . . . . . 1
DETAILED SPECIFIC ATIONS . . . . . . . . . . . . . . . . . .………. . .. .. .. . . . . . 2
CONTROLS. ………………….. .. . …………………………………... . . . . . . . 3
CONNECTIONS . . . . . . . . . . . ……….………………………………..…. . . . 4
OPERATION……. . . . . .. . . . . . . . .. .. . . . .. .. . . . . ….……… . . ... . . . . . . .5
BASIC TROUBLESHOOT ING. . . . . . . . . . . . . . . . . .….……. . .. .. .... . . . . . 6
EXPLODED VIEW-MECHANICAL PARTS LIST….… . … . .. .. . . .. . … . …..7
AMPLIFIER EXPLODED VIEW . . . . . . . . . . . . . . . . .….……. . .. ..... . . . . . 8
TEST SET-UP/PROCEDURE. . . . . . . . . . . . . . . . . .………. . .. .. .…. . . . . . 9
BLOCK DIAGRAM. . . . ………………... ………………………….... . . .. . … . 10
ELECTRICAL PARTS LIST …………. .... . .. . . . . . ……………………... . . . 11
IC – TRANSISTOR PINOUTS . … . . .. . . . . . ………………………….... . . . 15
PCB DRAWINGS. .. . . . . . . . . . . . . . .. . . . . ……………………………….. …16
SCHEMATIC DIAGRAMS . . …………………………………….……………. . .19
WIRING DIAGRAM………………………………………….…………… .. . … .22
SUB450 Specifications
Frequency Range: 39Hz – 150Hz (±3dB)
Amplifier Output: 100 watts RMS, 500 watts Peak
Low-Frequency Driver: 8" (203mm)
Crossover Frequency: 50Hz – 150Hz, 24dB/Octave, continuously variable
Dimensions (H x W x D): 16-1/4" x 10-1/4" x 15-1/2"
Weight: 28.3 lb (12.9kg)
Infinity cont inually str ives to update and impr ove existing product s, as well as create new ones. The specifications
and construction details in this and related I nfini ty publications are therefore subject to change without notice.
(413mm x 262mm x 394mm)
1
@50 to e put / c
SUB450
2
SUB450 Amplifier 100W Powered Sub/ Plate Amp
LINE VOLTAGE Yes/No Hi/Lo Line Unit Notes
Parameter Specification Unit
Amp Section
Type (Class AB, D, other) AB AB n/a External Sink required for Class AB
Load Impedance (speaker) 4 Ohms n/a Nominal Z-curve required
Rated Output Power 100 Watts 95 1 input driven
THD@ Rated Power 0.08 % 0.3 22k filter
THD @ 1 Watt 0.1 % 0.5 22k filter
DC Offset 10 mV-DC 20 @ Speaker Outputs
Damping factor >100 DF 50
Input Sensitivity
Signal to Noise
SNR-A-Weighted 100 dBA 90 rel. to rated power A-Weighting filter
SNR-unweighted 80 dBr 75 rel. to rated power 22k filter
SNR @ 1W-unweighted 60 dBr 55 rel. to 1W Output 22k filter
Residual Noise Floor 1.5 mVrms 2.5
Residual Noise Floor 1
Input Impedance
Filters
Low Pass (fixed or variable) fixed -- ±2dB
Subsonic filter (HPF) Hz ±2dB
Limiter (yes/no) YES -- n/a
Features
LFE Input YES functional BW Limited to 500 Hz
Volume pot Taper (lin/log) log -- functional
ATO YES functional
Input Configuration
Line In (L,R) L ,R -- functional RCA inputs: L , R Summed to Mono
Line level in LFE LFE functional
Spkr/Hi Level In
Signal Sensing (ATO)
Auto-Turn-On (yes/no) YES -- functional
ATO Input Frequency 50 Hz functional
ATO Level 2 mV functional
ATO Turn-on time 5 ms functional AC on, signal applied
Auto Mute/ Turn-OFF Time 15 minutes functional T before muting, after signal is removed Auto turn of time (T) must be 10 > T <15
Power on Delay time 3 sec. functional AC Power Applied
Transients/Pops
ATO Transient 5 mV-peak 10 @ Speaker Outputs
Turn-on Transient 50 mV-peak 100 @ Speaker Outputs AC Line cycled from OFF to ON
Turn-off Transient 50 mV-peak 100 @ Speaker Outputs AC Line cycled from ON to OFF
Efficiency
Stand-by Input Power 13 Watts 15 @ nom. line voltage Maximum allowable input power.
Power Cons.@rated power 185 Watts 195 @ nom. line voltage 100 Watts @ 4 Ohms nominal line voltage
Protection
Short Circuit Protection YES -- functional Direct short at output
Thermal Protection 65 deg. C -- functional @1/8 max unclipped Power rise
DC Offset Protection YES -- functional DC present at Speaker Out leads Relay or crowbar (for driver/fire protection)
Line Fuse Rating 2.5 Amps 2.5 Type-T or Slo Blo External fuse with UL/SEMKO rated holder
US 120vac/60Hz Yes 108-132 Vrms Normal Operation
Asia 100vac/50Hz Yes 90-110 Vrms Normal Operation
QA Test
Limits Conditions Notes
Measured at speaker terminals, Output
power 90 Watts THD 0.1 %
Input Frequency 50 Hz 50 Nominal Freq. 1 input driven
Line Input (L&R) 250 mVrms ±2dB To Rated Power 1 input driven
Speaker/Hi Level Input 2.5 Vrms ±2dB To Rated Power (-20 dB below Line In)...1 input driven
Line input L&R , LFE >15 K ohms n/a Nominal
Speaker/Hi Level Input 4.7 K ohms n/a Nominal
LFE Input 135 mVrms ±2dB To Rated Power LFE input driven only
Volume @max, using RMS reading
DMM/VOM (or A/P)
mVrms(max)
Slope & Q dB/Octave n/a
Slope & Q dB/Octave n/a
(L,R)
L,R -- functional L R Summed to Mono
Volume @max, w/ A/P Swept Bandpass
2
Measurement (Line freq.+ harmonics)
driven
POWER
HIGH LEVEL
+ – – +
SUBWOOFER
LEVEL
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
OUT
IN
L R
LINE LEVEL IN
LFE
L
R
AUTO ON
MIN MAX
AC 120V~60Hz
200 Watts
FUSE
2.5A/250V
TYPE T
IMPORTANT: CONNECT STRIPED WIRE TO RED ( ) SPEAKER TERMINAL.
GREEN: ON
RED: STANDBY
+
∞
¢
§
£
™
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SUB450
3
S
UBWOOFERCONTROLS
Rear Panel
A Few Suggestions
We recommend that you do not operate your speakers or
subwoofer with the bass,treble and loudness controls set to
full boost. This will place undue strain on your electronics and
speakers and could damage them.
The volume control setting on your processor/preamp or receiver
is not a specific indication of the overall loudness level of the
speakers.The only important consideration is the loudness level at
which the system can be played,regardless of where the volume
control is set.
Always turn down the volume control setting on your processor/
preamp or receiver when changing a cassette or CD,or switching
inputs to AM or FM operation.Excessively loud transients (clicks or
popping sounds) can damage the satellite speakers and possibly
LFE Input
Line-Level Inputs
AUTO/On Switch
the subwoofer.
Important!
Whenever changing cables,pulling plugs,etc.,ALWAYS TURN OFF
ALL EQUIPMENT,including the subwoofer.
Subwoofer Level Control
Power Switch
TSS-450
HIGH LEVEL
+ – – +
SUBWOOFER
LEVEL
OUT
IN
L R
LINE LEVEL IN
LFE
L
R
AUTO ON
MIN MAX
GREEN: ON
RED: STANDBY
SUBWOOFER OR
LFE OUTPUT
HIGH LEVEL
+ – – +
SUBWOOFER
LEVEL
OUT
IN
L R
LINE LEVEL IN
LFE
L
R
AUTO ON
MIN MAX
GREEN: ON
RED: STANDBY
RECEIVER/PROCESSOR
HIGH LEVEL
+ – – +
SUBWOOFER
LEVEL
OUT
IN
L R
LINE LEVEL IN
LFE
L
R
AUTO ON
MIN MAX
GREEN: ON
RED: STANDBY
RECEIVER/AMPLIFIER
Front Speaker Output
LEFT RIGHT
+ – – +
LEFT SPEAKER
– +
RIGHT SPEAKER
– +
SUB450
4
SUBWOOFER CONNECTIONS
®
If you have a Dolby* Digital or DTS
processor with a low-frequency-effects (LFE)
or subwoofer output:
If your receiver/processor does not contain
a Dolby Digital or DTS processor but has a
subwoofer output:
receiver/
15' subwoofer
cable included
Set line-level/LFE switch to “LFE.”
15' subwoofer
cable included
If your receiver/processor does not have
subwoofer outputs for the left and right
channels or an LFE output:
TSS-450
Set line-level/LFE switch to “Normal.”
NOTE:If your receiver/processor has only one sub out,
you may use either the L or R input.
SUB450
5
O
PERATION
Surround Modes
When using the TSS-450 in a Dolby* Digital or DTS home theater
system,make sure all speakers are set to “Small”.When using the
system in a Dolby Pro Logic* home theater system,make sure the
receiver’s center channel mode is set to “Normal.”
Some Dolby Digital-equipped receivers/processors offer different
setup options for each source or surround mode,e.g., CD-stereo,
videotape,Dolby Digital, Pro Logic.In each case,follow your
equipment’s instructions to ensure that the subwoofer output is
turned on and that the speakers are set to “Small”in each mode.
If your receiver has adjustable crossover settings,we recommend
the subwoofer crossover be set between 100Hz –120Hz.
Power On
Plug your subwoofer’sAC cord into a wall outlet.Do not use the
outlets on the back of the receiver.
Initially set the Subwoofer Level Control to the“MIN”position.
Turn on the subwoofer by pressing the Power Switch on the
rear panel.
Turn on your entire audio system and start a CD or movie
soundtrack at a moderate level.
Auto On/Stand-By
With the Power Switch in the AUTO position,the LED on
the rear panel will remain lit in red or green to indicate the
On/Stand-By mode of the subwoofer.
RED = STAND-BY (No signal detected,Amp Off)
GREEN = ON (Signal detected,Amp On)
The subwoofer will automatically enter the Stand-By mode after
approximately 10 minutes when no signal is detected from your
system. The subwoofer will then power ON instantly when a signal
is detected.During periods of normal use,the Power Switch
can be left on.You may turn off the Power Switch for extended
periods of nonoperation,e.g., when you are away on vacation.
Adjust Level
Turn the Subwoofer Level Control up about half way.If no
sound emanates from the subwoofer,check the AC-line cord and
input cables.Are the connectors on the cables making proper
contact? Is the AC plug connected to a “live”receptacle? Has the
Power Switch been pressed to the “On”position? Once you
have confirmed that the subwoofer is active,proceed by playing a
CD or DVD.Use a selection that has ample bass information.
Set the overall volume control of the receiver/processor to a
comfortable level.Adjust the Subwoofer Level Control until
you obtain a pleasing blend of bass.Bass response should
not overpower the room but rather be adjusted so there is
a harmonious blend across the entire musical range.Many
users have a tendency to set the subwoofer volume too loud,
adhering to the belief that a subwoofer is there to produce lots of
bass.This is not entirely true.A subwoofer is there to enhance
bass,extending the response of the entire system so the bass
can be felt as well as heard.However,overall balance must
be maintained or the music will not sound natural.An experienced
listener will set the volume of the subwoofer so its impact on
bass response is always there but never obtrusive.
TSS-450
If there is no sound from any
of the speakers:
• Check that receiver/amplifier
is on and a source is playing.
• Check that the powered
subwoofer is plugged in, its
Power switch is switched
on to the “•” position, and the
“Auto/On” switch is either
in the “On” or “Auto” position.
• Check all wires and connections between receiver/
amplifier and speakers. Make
sure all wires are connected.
Make sure none of the
speaker wires are frayed,
cut or punctured.
• Review proper operation of
your receiver/amplifier.
If there is no sound coming
from one speaker:
• Check the “Balance” control
on your receiver/amplifier.
• Check all wires and connections between receiver/
amplifier and speakers. Make
sure all wires are connected.
Make sure none of the
speaker wires are frayed,
cut or punctured.
• In Dolby Digital or DTS
modes, make sure that the
receiver/processor is
configured so that the speaker
in question is enabled.
If there is no sound from the
center speaker:
• Check all wires and
connections between
receiver/amplifier and
speaker. Make sure all wires
are connected. Make sure
none of the speaker wires are
frayed, cut or punctured.
• If your receiver/processor is
set in Dolby Pro Logic mode,
make sure the center speaker
is not in phantom mode.
• If your receiver/processor
is set in Dolby Digital or DTS
mode, make sure the
receiver/processor is configured so that the center
speaker is enabled.
If the system plays at low
volumes but shuts off as
volume is increased:
• Check all wires and connections between receiver/
amplifier and speakers. Make
sure all wires are connected.
Make sure none of the
speaker wires are frayed, cut
or punctured.
• If more than one pair of main
speakers is being used, check
the minimum impedance
requirements of your
receiver/amplifier.
If there is low (or no) bass
output:
• Make sure the connections
to the left and right “Speaker
Inputs” have the correct
polarity (+ and –).
• Make sure the subwoofer
is plugged into an active
electrical outlet.
• Make sure the powered
subwoofer is plugged in
and is either in the “On” or
“Auto” position.
• In Dolby Digital or DTS
modes, make sure your
receiver/processor is
configured so that the subwoofer and LFE output
are enabled.
If there is no sound from
the surround speakers:
• Check all wires and con-
nections between receiver/
amplifier and speakers. Make
sure all wires are connected.
Make sure none of the
speaker wires are frayed, cut
or punctured.
• Review proper operation of
your receiver/amplifier and its
surround-sound features.
• Make sure the movie or TV
show you are watching is
recorded in a surround-sound
mode. If it is not, check to see
if your receiver/ amplifier has
other surround modes you
may use.
• In Dolby Digital or DTS
modes, make sure your
receiver/processor is
configured so that the
surround speakers are
enabled.
• Review the operation of your
DVD player and the jacket of
your DVD to make sure that
the DVD features the desired
Dolby Digital or DTS mode,
and that you have properly
selected that mode using both
the DVD player’s menu and the
DVD disc’s menu.
TROUBLESHOOTING
Staple sales invoice here.
SUB450
6
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