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ZX475TiWeb Manual
September 7, 1999
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TABLE OF CONTENTS
Features 02
Specifications 03
Operational Details 04-05
System Design, PowerFlowtmSystem 06-07
System Design, Examples 08-1 5
Installation, Mounting 16
Installation, Power & Speaker Connections 17
Installation, Input Sensitivity & Bass Adjustment 18
Trouble-Shooting 19- 20
Warranty Information 21
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FEATURES
• TCCHtmThermal Convection Cooled Heatsink. This proprietary design uses a variable speed
fan to ensure that the ZXTikeeps its cool when the music gets hot!
• High-current Triple Darlington output stage. This tried and true topology is the standard for
outstanding dynamic peak output performance
• TAIMtmTimed Acoustically Integrated Muting. Ensures dead silent turn on & off. No clicks, pops
or buzzes
• Tri-lineartmcapability allows simultaneous stereo and bridged operation
• Output current sensing allows the ZXTito automatically optimize the power supply and output
stage to reliably operate at impedances as low as 2 ohms bridged or 1 ohm stereo
• Intuitive crossover configuration switch assures easy initial setup
• 24dB per octave, high pass or low pass crossover. Continuously variable from 40 Hz to 8 kHz front
and 40 Hz to 800 Hz rear
• Auxiliary outputs route high pass, low pass or full range signals to another amplifier
• Twin-TtmBass Boost circuit provides up to 18dB of boost at 45 Hz
• SuperbritetmTri-LED power-on indicator
• Independent Thermal and Overload protection LED indicators
• Custom formed chassis with unique Titanium finish
• 24kt gold plated power and speaker terminals
• 2-ounce copper, double-sided G10 glass-epoxy printed circuit boards
• Replaceable insulated mounting feet
• Audiophile grade capacitors and 1% tolerance metal film resistors throughout the audio path
• Optional LPL44tmLow Pass Level controller allows the driver to adjust bass volume from the
driver’s seat
• Optional RDDPtmRemote Diagnostic Display Panel uses two tri-color LED’s allowing the driver to
monitor the amplifier’s battery voltage, power-on, thermal and overload status
• Optional SDTtmSuperior Digital Technology allows the driver to monitor the amplifier’s battery
voltage with a vacuum florescent display along with a tri-color LED indicating power-on, thermal
and overload status
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SPECIFICATIONS
Continuous Output Power at 1% THD (Wrms):
ZX475Ti
Into 4 ohms Stereo @ 12.5 Vdc (IASCA/USAC) 18 x 4
Into 4 ohms Stereo @ 14.4 Vdc 75 x 4
Into 2 ohms Stereo @ 14.4 Vdc 150 x 4
Into 4 ohms Bridged @ 14.4 Vdc 250 x 2
Minimum Speaker Load, Bridged 2 ohms
Minimum Speaker Load, Stereo 1 ohm
Recommended Fuse Size, Stereo 4 ohms / Stereo 2 ohms / Bridged 60 / 80 / 80 amp
Continuous Current Draw @ Full Power * 60 amps
Peak Current Draw @ Full Power ** 85 amps
Dimensions, Chassis (inches) 15.00 L x 9.00 W x 2.25 H
Dimensions, Overall (inches) 16.00 L x 10.00 W x 2.25 H
Total Harmonic Distortion < 0.02 %
Signal to Noise Ratio (A-weighted) > 100 dB
Frequency Response +/- 1 dB, 20 Hz to 20 kHz
Bass Boost 0 to +18 dB @ 45 Hz
Crossover Frequency Range 40 Hz to 8 kHz
Crossover Slope 24 dB per octave
Input Sensitivity 200 millivolts to 6 volts
Input Impedance > 30 kohms
Input Voltage Range 0.2 volts to 6 volts
Power Supply Operating Range 10.5 Vdc to 15.5 Vdc
Typical current draw at idle < 3 amps
*Average continuous current draw when playing typical music material.
**Average peak current needed for musical peaks (<20ms) when playing typical music material.
Due to ongoing research and development, features, specifications and availability are subject to change without notice.
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OPERATIONAL DETAILS
160
110
220
300
450
40
800
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OPERATIONAL DETAILS
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SYSTEM DESIGN
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SYSTEM DESIGN
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SYSTEM DESIGN examples
Minimum bridged load is 2 ohms.
Minimum load per channel is 1 ohm.
The front crossover frequency control determines the
XS62's highpass frequency independently of the XS124
and rear speakers.
The rear crossover frequency control determines the
XS124's lowpass frequency and auxiliary output's highpass frequency.
The auxiliary outputs send highpass signals to another
amplifier.
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Use the LPL44 to control the XS124's volume from the
driver's seat.
* For single preamp headunits, set the input select
switch to FRONT. This allows signals from the front
inputs to reach the rear crossover without the use
of “Y” connectors.
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SYSTEM DESIGN examples
Minimum bridged load is 2 ohms.
Minimum load per channel is 1 ohm.
The front crossover frequency control determines the
XS130's highpass.
The bandpass signal for the XS84’s midbass is created
between the front and rear crossover frequency settings.
The rear crossover frequency control determines the
auxiliary output's lowpass frequency.
The auxiliary output sends lowpass signals to another
amplifier.
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Use the LPL44 to control the auxiliary output's volume
from the driver's seat.
NOTE: If connecting tweeters to the front outputs, set
the frequency multiplier switch to X10. This multiplies
the front crossover's frequency range by a factor of ten.
The range becomes 400 to 8kHz.
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SYSTEM DESIGN examples
Minimum bridged load is 2 ohms.
Minimum load per channel is 1 ohm.
The rear crossover frequency control determines the
crossover frequencies of all outputs.
Use the LPL44 to control the volume of both front and
rear outputs.
Ti
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The auxiliary output sends highpass signals to another
amplifier.
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SYSTEM DESIGN examples
Minimum bridged load is 2 ohms.
Minimum load per channel is 1 ohm.
The front crossover frequency control determines the
XS62's highpass frequency independently of the XS69’s
and auxiliary outputs.
The rear crossover frequency control determines the
XS69's highpass frequency and auxiliary output's
lowpass frequency.
The auxiliary output sends lowpass signals to another
amplifier.
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Use the LPL44 to control the auxiliary output's volume
from the driver's seat.
* For single pre-amp headunits, set the input select
switch to FRONT. This allows signals from the front
inputs to reach the rear crossover without the use of
“Y” connectors.
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SYSTEM DESIGN examples
* For single pre-amp headunits, set the input select switch to FRONT. This allows signal from the front inputs to
reach the rear channels without the use of “Y” connectors.
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SYSTEM DESIGN examples
The front crossover frequency control determines the
XS62's highpass frequency independently of the XS124
and rear speakers.
The rear crossover frequency control determines the
XS124's lowpass frequency.
The auxiliary outputs send full range signals to another
amplifier.
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Use the LPL44 to control the XS124's volume from the
driver's seat.
* For single preamp headunits, set the internal select
switch to FRONT. This allows signals from the front
inputs to reach the rear crossover without the use
of “Y” connectors.
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SYSTEM DESIGN examples
The front crossover frequency control determines the
XS62's highpass frequency.
The rear crossover frequency control determines the
XS124's lowpass frequency.
The bandpass signal for the XS84 midbasses is created
between the front and rear crossover frequency settings.
The auxiliary outputs send bandpass signals to another
amplifier.
Use the LPL44 to control the XS124's volume from the
driver's seat.
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SYSTEM DESIGN examples
The auxiliary outputs send lowpass signals out to the
Bass Cube and then back into the front inputs.
The front crossover frequency control determines the
XS62's highpass frequency and the XS124's lowpass
frequency.
Use the LPL44 to control the XS124's volume from the
driver's seat.
NOTE: Locating the Bass Cube in this position of the
signal flow allows only the low pass signal for the XS124
to be boosted. The XS62’s high pass signal will be
unaffected by the Bass Cube’s boost.
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INSTALLATION
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INSTALLATION
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INSTALLATION
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TROUBLE-SHOOTING
SYMPTOM
No output and Power-on
LEDs are off
No output and power-on
LEDs are on
Distorted sound
Amplifier cuts off when
driven to high output
levels. Thermal protection
circuit activated (yellow
LED on).
POSSIBLE CAUSE
No battery, ground, or remote
connection
Blown or melted power fuse
No signal from the head unit or
previous signal processor
Faulty input signal cables
Faulty speaker or speaker cables
Clipped input signal feeding the
amplifier or signal processor
Amplifier or signal processor's input
sensitivity too high
Poor ventilation
Total speaker impedance is too low
causing excessive heat.
SOLUTION
Verify that the B+, B-, and remote turn-on
terminals are properly connected and that the
headunit is turned on. Use a DC voltmeter to
check for 12 volts between the ground terminal
and the B+ terminal. Also, check between the
ground terminal and the remote turn-on terminal.
Use an ohmmeter to verify that the fuse has
continuity between its ends. Disconnect the main
B+ cable from the battery and the inputs of all
devices in the system (including capacitors). Use
an ohmmeter to check for a short between the
power cable system and the vehicle's chassis.
Correct any short and install a new fuse. Replace
only with the same rating and type of fuse.
Use an AC voltmeter to check for voltage at the
headunit or processor's preamp outputs. The
level should fluctuate with peaks in the music.
An analog gauge works well for this test.
Use an AC voltmeter to check for voltage at the
signal cables' outputs. Try substituting different
signal cables.
Try substituting another speaker or cables.
Make sure the headunit and all other components
are not producing a clipped signal. Most headunits clip their own output above 7/8 volume.
Distorted signals coming into the amp will sound
distorted at any input sensitivity setting.
Lower input sensitivity (counterclockwise).
Setting the sensitivity too high causes distortion.
Distortion causes speakers to rapidly overheat
and can result in speaker failure.
Check for a poor mounting location that allows
hot air to be re-circulated within the heatsink.
Check for blocked input or exhaust openings.
Re-wire speakers to raise the total impedance
seen by the amp. Minimum impedance is 2 ohms
bridged or 1 ohm stereo.
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Authorized Phoenix Gold Service Centers
USA
Phoenix Gold Factory 877.745.3782
Canada
Trends Electronics 604.988.2966
TROUBLE-SHOOTING
SYMPTOM
Amplifier cuts off when
driven to high output
levels. Overload circuit
activated (red LED on).
POSSIBLE CAUSE
Excessive output current is the only
thing that can cause the Overload
LED to light. There are only a few
possible causes:
A damaged speaker cable touching
the vehicle chassis, speaker cables or
speaker tinsel leads touching each
other, or damaged speaker voice coil.
Damaged passive crossover
components.
Total speaker impedance is too low
causing excessive output current.
Defective output transistor inside the
amplifier
SOLUTION
With the speaker wires disconnected from the
amp, use an ohmmeter to check for a short from
any speaker cable to chassis ground. Check the
DC resistance of the speaker's voice coil. It
should be close to the speaker's nominal impedance specification and should fluctuate when the
cone is touched. Visually check each speaker for
damaged tinsel leads, or other broken parts.
Smell the speaker's magnet area for a burned
scent indicating a damaged voice coil.
Visually examine inductors, capacitors and
resistors for signs of heat stress, water, or
physical damage. Use a soldering iron to touch
up connections to the crossover circuit board.
Try substituting a different crossover network.
Re-wire speakers to raise the total impedance
seen by the amp.
This condition will cause the overload LED to
stay lit without speaker wires connected to the
amplifier. The amplifier must be returned to an
authorized service center for repair.
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LIMITED WARRANTY
Phoenix Gold International, Inc. (or "Phoenix Gold") warrants its products against defects in
materials and workmanship for a limited period of time.
For a period of one (1) year from date of original purchase, we will repair or replace the electronic
product, at our option, without charge for parts and labor. The limited warranty period is EXTENDED
to three (3) years from date of original purchase if the product was originally installed by an
authorized Phoenix Gold electronics dealer and accompanied by a valid sales receipt showing a
charge for installation. Customer must pay all parts and labor charges after the limited warranty
period expires. The limited warranty period for factory refurbished products expires after ninety (90)
days from date of original purchase. This limited warranty applies only to purchases from authorized
Phoenix Gold Electronics and Speaker retailers.
This limited warranty is extended only to the original purchaser and is valid only to consumers in
the United States. Consumers are required to provide a copy of the original sales invoice from an
authorized Phoenix Gold dealer when making a claim against this limited warranty. This limited
warranty only covers failures due to defects in materials or workmanship that occur during normal
use. It does not cover failures resulting from accident, misuse, abuse, neglect, mishandling,
misapplication, alteration, faulty installation, modification, service by anyone other than Phoenix
Gold, or damage that is attributable to Acts of God. It does not cover costs of transportation to
Phoenix Gold or damage in transit.
This warranty will become void if the serial number identification has been wholly or partially
removed, altered or erased. Repair or replacement under the terms of this warranty does not
extend the terms of this warranty.
Should a product prove to be defective in workmanship or material, the consumer's sole remedies
will be repair or replacement as provided under the terms of this warranty. Under no circumstances
shall Phoenix Gold be liable for loss or damage, direct, consequential or incidental, arising out of the
use of or inability to use the product. There are no express warranties other than described above.
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