Infinity HPS-500 User manual

HPS500
High-Current Powered Subwoofer
A Harman International Company
Rev. A 8/00
Technical Manual
INFINITY SYSTEMS INC.
250 Crossways Park Drive
Woodbury, New York 11797

2
Amplifier/Subwoofer HPS500
GENERAL SPECIFICATIONS
Frequency Response (A3dB) .................22Hz – 120Hz
Output ..................................500W
Driver ..................................15"Downfiring Woofer with Hyperflared Port
Dimensions (HxWxD).....................19-3/4" x 19" x 22-7/16"
502mm x 483mm x 570mm
Weight..................................77.2 lbs./35kg.
Refinements may be made on occasion to existing products without notice,
but will always meet or exceed original specifications unless otherwise stated.
TABLE OF CONTENTS
GENERAL SPECIFICATIONS..........................................2
TABLE OF CONTENTS....................................................2
CAUTIONS AND WARNINGS..........................................2
HPS500 SPECIFICATIONS..............................................3
CONTROLS AND CONNECTIONS..................................4
HPS500 CONNECTIONS................................................5
OPERATION .....................................................................7
HPS500 BLOCK DIAGRAM .............................................8
HPS500 TEST SET UP AND PROCEDURE...................9
DISASSEMBLY PROCEDURES ....................................10
HPS 500 (120 & 230 V) TEST PROCEDURE ..............11
HPS500 CABINET EXPLODED VIEW...........................12
HPS500 AMP ASSEMBLY EXPLODED VIEW..............13
HPS500 INPUT CUP ASSEMBLY EXPLODED VIEW..14
HPS500 PACKING .........................................................15
HPS500 POWER SUPPLY PCB....................................16
HPS500 LINEAR AMPLIFIER PCB................................17
HPS500 AC POWER & LOW LEVEL INPUT PCB's.....18
HPS500 HI LEVEL INPUT PCB.....................................19
HPS500 ELECTRICAL PARTS LIST .............................20
HPS500 INTEGRATED CIRCUIT DIAGRAMS ..............24
HPS500 FEATURE BOARD SCHEMATIC ....................25
HPS500 HIGH LEVEL & LOW LEVEL INPUT
AND LINE FILTER SCHEMATICS ................................26
HPS500 LINEAR AMPLIFIER SCHEMATIC (1 of 2) ....27
HPS500 LINEAR AMPLIFIER SCHEMATIC (2 of 2) ....28
HPS500 POWER AMPLIFIER SCHEMATIC (1 of 2)....29
HPS500 POWER AMPLIFIER SCHEMATIC (2 of 2)....30
BEFORE THIS AMPLIFIER IS PLUGGED IN, make sure its rated voltage corresponds to the voltage of the AC power
source to be employed. Failure to use the correct voltage could cause damage to the amplifier when the AC power cable
is plugged in. Do not exceed the rated voltage by more than 10%; operation below 90% will degrade performance or
cause the unit to shut off.
WHEN SERVICING THIS AMPLIFIER:
1. Do not touch the metal frame of the woofer (if removed from the cabinet) when driving the amplifier at high power
levels. In the unlikely event that the output devices in the amplifier fail and present an open circuit during their operation,
AND the driver voice coil was to come in contact with the motor assembly, hazardous voltage could be present at the
woofer frame.
2. When 120/230v-based test equipment is connected to the amplifier in any way, use of a 1000W isolation transformer
(Stancor model GIS-1000 or similar) on the subwoofer is necessary for safety; in addition, an isolator plug, (a
three-to-one pin adapter sometimes called a “cheater plug”) should be used on the power cord plug of the test equipment
being used.
CAUTIONS AND WARNINGS

3
Amplifier/Subwoofer HPS500
HPS500 SPECIFICATIONS
Infinity HPS-500 500w Powered Sub Amp SPECIFICATIONS
Frequency respose 22Hz - 120Hz
Drive Unit 15" Woofer
Weight 77.2 lbs./35kg
Dimensions
(HxWxD) 19 3/4 x 19 x 22 7/16" (502 x 483 x 570mm)
LINE VOLTAGE 120VAC/60Hz
LINE VOLTAGE 230VAC/50Hz
Amp Section
Type (Class AB, D, other) AB Bridged -- -- BASH® Power Supply
Load Impedance (speaker) 20 Ohms -- Nominal Z-curve required
Rated Output Power 500 Watts 400 1 input driven
THD@ Rated Power 0.1 % 122k filter 500w
THD@1Watt 0.3 % 122k filter
Polarity 0 deg. 0° ±20 In phase at 50Hz in Direct Mode .250 faston (+)……205 faston (-)
DC Offset 20 mV-DC 50 @ Speaker Outputs
Damping factor >200 DF --
Input Sensitivity
Input Frequency 31 Hz 31 Nominal Freq. 1 input driven
Line Input 350 mVrms ±2dB To Rated Power 1 input driven
Speaker/Hi Level Input 8 Vrms ±2dB To Rated Power (-26dB below Line In)...1 input driven
Signal to Noise
SNR-A-Weighted 100 dBA 90 relative to rated power A-Weighting filter
SNR-unweighted 70 dBr 70 relative to rated power 22k filter
SNR rel. 1W-unweighted 60 dBr 55 relative to 1W Output 22k filter
Residual Noise Floor 2 mVrms 3Volume @max, using RMS reading DMM/VOM (or A/P)
Residual Noise Floor 1.5 mVrms(max) 2Volume @max, w/ A/P Swept Bandpass Measurement (Line freq.+ harmonics)
Input Impedance Line Input 3k ohms N/A
Speaker/Hi Level Input 470 ohms N/A
Active Filters
Low Pass (fixed or variable) Variable Note: Center positon = 100Hz
Low Pass filter (point or range) 45-120 Hz ±2dB
Slope 12 dB/Octave n/a
Q 0.707 Damping n/a
Normal-Direct Switch yes -- functional
Low Pass filter (point or range)
160 (direct),
45-120 (normal) Hz ±2dB
Slope 12 dB/Octave --
Q -- Damping --
Subsonic filter (HPF) 31 Hz ±2dB
Slope 12 dB/Octave --
Q -- Damping --
Video Boost Switch yes -- --
Boost +3 dB --
Range 40-80 Hz --
Features --
Limiter
Line Out Crossover Switch
Phase Switch -- functional
Line Output (80Hz HPF-unity gain) -- functional
Volume pot Taper (lin/log) log -- functional
Input Configuration -- --
Line Out: 80/120/160Hz HPF 80/120/160 Hz functional
Slope 6 dB/Octave functional
Q 0.707 Damping functional
Power on Delay time >3 sec. >3 AC Power Applied
Transients/Pops
ATO Transient 10 mV-peak 20 @ Speaker Outputs
Turn-on Transient 500 mV-peak 1v-pp @ Speaker Outputs AC Line cycled from OFF to ON
Turn-off Transient 500 mV-peak 1v-pp @ Speaker Outputs AC Line cycled from ON to OFF
Efficiency
Stand-by Input Power 10 Watts 15 @ nom. line voltage
Power Cons.@rated power 670 Watts N/A @ nom. line voltage
Protection
Thermal Protection yes functional Decreases gain at 113°C -1.3dB
DC Offset Protection yes functional DC present at Speaker Out leads Relay or crowbar (for driver/fire protection)
Line Fuse Rating 4 Amps functional Type-T or Slo Blo External fuse with UL/SEMKO rated holder
SpecificationsParameter Unit Limits Conditions Notes

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Amplifier/Subwoofer HPS500
EQ
PHASE
INPUT
GAIN
150 50 10 0
AUDIO VIDEO 0°180°NORMAL DIRECT
100
CROSSOVER
123 12
13
45
LOW
LEVEL
IN
LOW
LEVEL
OUT
120Hz
160Hz
80Hz
HIGHPASS
OUTPUT
11
67 8 9 10
CONTROLS AND CONNECTIONS
1. Equalizer - The EQ optimizes subwoofer performance
for audio or video playback.
2. Crossover Frequency - The crossover frequency
knob determines the highest frequency your
subwoofer will reproduce. It allows a seamless
transition from the subwoofer to the satellite
speakers.
3. Phase - The phase switch is used to adjust the
relative polarity of the subwoofer. When the phase
switch is up, the phase is normal - when the switch
is depressed, the subwoofer is 180 degrees out of
phase.
4. Gain - This knob controls the volume status of the
subwoofer.
5. Input - The Input switches between the normal
line/speaker inputs and the direct-LFE input.
6. Highpass Output - This toggle switch controls the
roll-off frequency of the high pass filter, the LOW
LEVEL OUT connectors, #7.
7. Low Level output - These RCA output jacks are used
when it is desirable to limit the low frequencies to your
main receiver/power amplifier; see more on page 6
8. Low Level Input - Main RCA input jacks, recommend
hook-up method. When using a single LFE (Low
Frequency Effects) cable from a Dolby Digital
receiver/processor, use either left or right RCA jack.
9. Fuse - Use only same type of fuses. Use a 4A 250v
MDL Slo-Blo fuse for the 120v model, and a 2A
250v MDL Slo-Blo fuse for the 230v model.
10. AC Plug - Plug in the AC line cord in here.
11. High Level Inputs - These High Level Inputs are for
receivers that do not have line-level “pre-amp out”
or “subwoofer out”jacks. When a pair of main or
satellite speakers are attached to the OUTPUT
terminals, they are driven the full range of
frequencies as generated by the music source
(receiver, amplifier, etc.)
12. LED - This LED turns green when the HPS250 is
receiving power (is turned on) and is receiving a
signal.
13. Main - This button is the master power switch.

If your receiver/processor does not have subwoofer
outputs for the left and right channels:
If your receiver/processor has subwoofer outputs for
the left and right channels:
NOTE: Some receivers have a single subwoofer
output (do not confuse this with a single LFE output as
described on the next page). In that case, it is
recommended that you use a Y connector (not
included) to maximize performance.
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Amplifier/Subwoofer HPS500
HPS500 CONNECTIONS
LOW
LEVEL
OUT
LOW
LEVEL
IN
L
R
120Hz
160Hz
80Hz
HIGHPASS
OUTPUT
RECEIVER/PROCESSOR