SP-XO03 dbPRO manual
R
Foreword
Front High-Pass Crossover Frequency Adjustment :
The SP-XO03 dbPRO is a full-featured Three Way Crossover. When used to build a 2-way
system with front and rear fader capability or a full three-way system, the SP-XO03 dbPRO
electronic crossover allows you to choose from a wide range of crossover points between
the front, rear and subwoofer outputs. The SP-XO03 dbPRO includes the following features:
3 Way Electronic Crossover
Continuously Variable Electronic Crossover
Frequency with Multiplier Switch
Separate Inputs for Front, Rear and Subwoofer
Front and Rear High-Pass Output
Adjustable Low-Pass Gain
Subwoofer Bass Boost
Remote Subwoofer Level Control
Ground Loop Isolation Input Circuitry
Silver Plated RCA Input/output Jacks
Remote Turn On Circuit
Power-on-LED
Output Voltage Level : 9 Volts
Adjusts the crossover to match your speaker system. The crossover frequency can be
adjusted from 32Hz- 400Hz or from 640Hz-8kHz with the crossover frequency multiplier
switch.
Rear High-Pass Crossover Frequency Adjustment :
Adjusts the crossover to match speaker your system. The crossover frequency can be
adjusted from 65Hz- 4.5KHz.
Rear Low-Pass Crossover Frequency Adjustment :
Adjusts the crossover to match match speaker your system. The crossover frequency can
be adjusted from 300Hz- 4.6KHz.
Rear Channel High Pass / Band Pass Selector :
In Triamp System, Converts Rear Channel to Band Pass.
Input / Output Connections and Audio Controls
SP-XO03 dbPRO contains the controls for the crossover and output levels as shown below.
Figure 1-
Subwoofer Crossover Frequency Adjustment :
Adjusts the crossover to match your speaker system. The crossover frequency can be
adjusted from 45Hz - 250Hz.
Frequency Multiplier Switch :
When engaged, this switch increases the x-over frequency by a factor of 20. Example: If
the frequency is set for 70Hz, moving the frequency multiplier switch to X20 changes the
setting to 1.4kHz.
Output Level Controls :
Seperate Front, Rear and Subwoofer Output Level Controls allow you to set the nominal
operating level of the crossover.The crossover's output level ranges can accommodate virtually
any brand of amplifier.
Subwoofer Boost Control :
The crossover also features a " high-Q " (i.e. narrow frequency band) Bass Boost circuit. It
acts much like an equalizer, with adjustable gain (from 0 - +18dB) with a center frequency
adjustable from 25Hz -100Hz. Use this feature to tune low-frequency audio response to
compensate for a less than ideal subwoofer enclosure design. The added boost produces
rich, full bass tones that are normally difficult to reproduce in the car audio environment.
Use the Freq dial to set the Boost Freq and the Sub Boost Level dial to set the amount of
boost. Note: If Bass Boost is undesired, set Sub Boost Level to 0dB.
24
Phase Switch :
25
When set to 180 degrees, this switch reverses the phase of the subwoofer output signal.
This is used for fine tuning the bass response after the installation is complete.
14. Ground Input Connector
15. Battery +12V Input Connector
16. Remote Turn-On Input
17. Front RCA Output
18. Front Output Level
19. Rear RCA Output
20. Rear Output Level
21. Phase Switch
22. Sub RCA Output
23. Sub Output Level
24. Remote Sub Level Connector
25. Remote Sub Level Control
1. Front RCA Input
2. Front Crossover Frequency Control
3. Front/Rear Input Selection Switch
4. Rear RCA Input
5. Rear High Pass Frequency Control
6. Sub Input Selection Switch
7. Sub RCA Input
8. Sub Crossover Frequency Control
9. Rear Low Pass Frequency Control
10. Frequency Multiplier Switch
11. Rear High Pass / Band Pass Selector
12. Sub Bass Boost Frequency
13. Sub Bass Boost Level
-1-
Power Indicator :
The power indicator will light up when the crossover is on.
Front/Rear Input Switch :
This switch allows use of a 2 channel input to drive both the front and rear inputs.
Sub Input Switch :
This switch allows the signal from the front and rear channels to be directed to the sub input
when a dedicated sub input is not available.
Remote Sub Level Control :
When the remote sub level control is plugged, The subwoofer output level control on the
SP-XO03 dbPRO will be defeated. Instead the remote sub level control will set the sub
output level.
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MOUNTING PRECAUTIONS
Figure 3 - Electrical connections for the SP-XO03 dbPRO
The SP-XO03 dbPRO crossover can be mounted in any convenient location in your vehicle
that allows access to the controls and is away from moisture. The flanges on the chassis
have mounting holes which can be used as a template for screw holes. For easy system
set-up, mount the crossover so the front panel controls will be accessible after installation.
In addition, observe the following precautions:
Figure 21. Mount the crossover on a rigid surface. Do
not install the crossover on plastic or other
combustible materials.
2. Prior to drilling, make sure proposed mounting
holes will not cut into the fuel tank, fuel lines,
brake lines (under chassis), or electrical wiring.
Chassis Ground
Rear RCA Out
Remote Turn-on
Front RCA Out
Front RCA In
Rear RCA In
3. Avoid mounting to subwoofer enclosures or
areas prone to vibration.
WIRING PRECAUTIONS
Read all wiring precautions. If you are not sure of the connections, contact your authorized
SOUNDPEAK dealer.
If you are using a source unit, without a remote turn-on lead, the SP-XO03 dbPRO can be
turned on with a switched accessory lead. You can find this accessory power source in the
factory harness at the back of the radio. It is the lead that turns on and off with the key.
APPLICATIONS
The SP-XO03 dbPRO allows you to design either a 2-way system with front and rear output
or a full 3-way system. After determining which system best fits your requirements,
thoroughly read and follow the directions below for your system type.
2-Way System with Front and Rear Output
1. Before installation, make sure the source unit Power switch is in the OFF position.
2. Disconnect the negative (-) lead of the battery before making any power connections.
Chassis Ground
3. A clean chassis ground connection is critical to the performance of your SOUNDPEAK
crossover. Use the shortest ground wire possible and securely connect to the car chassis
to minimize resistance and avoid noise problems.
4. Refer to the Figure 3 when making electrical connections. Connect the Xover's positive
(+) lead via a fuse directly to the positive (+) terminal on the battery. Use red-insulated
18-gauge (or larger) wire for the crossover's positive (+) power lead and the same-gauge
black insulated wire for the ground.
5. To avoid noise problems, run the crossover's positive (+) power lead and the amplifier's
positive (+) power lead along one side of the vehicle to the battery. Run the remote turn-on
wire and RCA audio cables down the center, and route the speaker wires along the remaining side. If wires must cross, run them perpendicular to each other.
Front RCA In
Front Amp
Front RCA Out
Rear RCA In
Rear Amp
Rear RCA Out
Sub RCA In
Sub RCA Out
6. When creating passage holes for the power wire, use grommets to eliminate any sharp
edges created during drilling. This will protect the wire from being nicked and causing a
short circuit.
7. Extra cable can cause signal loss and act as an " ANTENNA " for noise. Use only highquality RCA cables that are no longer than necessary to make a direct connection with
the source unit and amplifiers.
-3-
Sub Amp
Figure 4 - In this illustration, the SP-XO03 is configured for two channel input with dedicated
amplifiers for front speakers, rear speakers and subwoofer(s). See Figure 5 for switch
settings.
-4-
2-Way System Application Notes
Front RCA In
For 2 channel input,
configure switches as
shown.
After all the wiring connections are made and before the system is turned on for the
first time, you need to make some basic adjustments. It is important that the HighPass and Low-Pass Frequency Controls are set correctly before turning on the system
for the first time.
Setting the Crossover Frequency Controls
1. Set the crossover frequency controls to the frequency recommended by the speaker
manufacturer. The following are some guidelines if this information is not available:
Most 6" speakers will operate down to 80 - 100Hz.
Most 5" or 4" speakers will operate down to 100 - 150Hz.
Most 3" speakers will not operate below 300Hz.
Most subwoofers have decreased sound quality when operated above 150Hz.
Depending upon the size of the front and rear speakers and the type of subwoofer
system, fine tuning these adjustments may be required after the initial system set-up.
Study the system design pages of this manual to determine the proper settings for
these controls. Speakers are easily damaged if they are crossed over at a frequency
below their usable range.
Front RCA In
For 4 channel input
with front and rear
fade, configure
switches as shown.
Rear RCA In
2. When making the high frequency adjustments, adjust the Low-Pass frequency control and the low frequency amplifier gain. Usually, the Low-Pass frequency should be
set the same as the High-Pass frequency.
NOTE: An exception will be when the front/rear speaker is too small to play down to a
very low frequency and the subwoofer sounds distorted trying to "play up" to meet the
front/rear speaker. This may require a gap or difference between the high and low
settings. Although not ideal, this is sometimes necessary to make the system work as
well as possible.
Setting the Front Output Level
Before setting front level controls, disconnect both the rear output and the subwoofer
output and follow the directions below.
1. Turn the output control level to the minimum setting.
2. Turn the amplifier gain controls to the minimum setting.
3. Turn the source unit on and increase the volume until distortion is heard,
then reduce volume to just below this point.
Front RCA In
For front and rear fade
with dedicated
subwoofer input,
configure switches as
shown.
Rear RCA In
Sub RCA In
NOTE: This is the maximum usable musical signal for this source unit. turning the volume beyond this point will increase noise and distortion without an increase in
musical signal. If you can increase the source unit volume to maximum without
audible distortion, raise the output level controls slightly and begin again.
4. With the amplifier gains still at minimum and the source unit set at maximum volume
without distortion, raise the front output level control until distortion is heard, then
reduce gain to just below this point. This is the maximum output level for this system.
For best performance do not increase beyond this point.
Figure 5-5-
-6-
Setting the Rear Output Level
2-Way System with Front and Rear Output
Before setting rear level controls, disconnect both the front output and the subwoofer output
and follow the directions below.
1. Turn the output control level to the minimum setting.
2. Turn the amplifier gain controls to the minimum setting.
3. Turn the source unit on and increase the volume until distortion is heard, then reduce
volume to just below this point.
NOTE: This is the maximum usable musical signal for this source unit. turning the volume beyond
this point will increase noise and distortion without an increase in musical signal. If you can
increase the source unit volume to maximum without audible distortion, raise the output level
controls slightly and begin again.
Chassis Ground
Front RCA Out
Remote Turn-on
Front RCA In
Front Amp
4. With the amplifier gains still at minimum and the source unit set at maximum volume
without distortion, raise the rear output level control until distortion is heard, then
reduce gain to just below this point. This is the maximum output level for this system.
For best performance do not increase beyond this point.
Front RCA Out
Rear Amp
Rear RCA Out
Setting the Sub Output Level
Sub RCA Out
1. Make sure all outputs are connected and the front and rear output levels are set
correctly. Unplug the Remote Sub Level control cable.
Sub Amp
2. Be sure the sub output level and amplifier gains are at their minimum settings.
3. With the volume set at a medium level, slowly increase the sub level control to the
point where the subwoofer volume blends with the system.
4. If maximum sub output level does not provide enough subwoofer volume, slightly
increase the subwoofer amplifier gain until desired level is reached.
5. Fine tune the bass response using the Sub Boost Controls.
Figure 6 - In this illustration, the SP-XO03 dbPRO is configured for single channel input
with dedicated amplifiers for tweeters, midranges and subwoofer(s).
3-Way System Application Notes
6. Plug the Remote Sub Level Control cable back into the SP-XO03dbPRO crossover.
After all the wiring connections are made and before the system is turned on for the first time,
you need to make some basic adjustments. It is important that the High-Pass and Low-Pass
Frequency Controls are set correctly before turning on the system for the first time.
Setting the Sub Boost Level
Setting the Crossover Frequency Controls
1. Initially set the sub boost level to the minimum setting (i.e. 0dB).
2. Listen to a variety of music styles (e.g. Rock, Rap, etc.) and slowly increase the
Sub Boost control until a noticeable increase in low bass response is perceived.
3. Slowly adjust the Sub Boost Frequency control (up or down) to realize the best
bass response.
CAUTION: This feature can make a subwoofer put out more energy at very low frequencies.
Be cautious with this control because with too much boost at low frequencies the power
handling of the subwoofer will be decreased. This is a subjective setting and will depend on
your personal listening preferences. If you hear a "pop" (due to speaker over-excursion),
lower the Sub Boost Level to prevent speaker damage. If the system sounds muddy and
distorted (due to amplifier clipping), lower Sub Boost to avoid shutdown from overheating.
1. Set the crossover frequency controls to the frequency recommended by the speaker
manufacturer. The following are some guidelines if this information is not available:
Most tweeters will not operate below 5000Hz.
Most 6" midranges will operate down to 80 - 100Hz.
Most 5" or 4" midranges will operate down to 125 - 200Hz.
Most subwoofers have decreased sound quality when operated above 150Hz.
Depending upon the size/type of the midranges and tweeters and the type of subwoofer
system, fine tuning these adjustments may be required after the initial system set-up. Study
the system design pages of this manual to determine the proper settings for these controls.
Midranges and tweeters are easily damaged if they cross at a frequency below their useable
range.
2. The Low-Pass frequency should be set the same as the High-Pass frequency.
NOTE: An exception will be when the midrange is too small to play down to a very low frequency and the subwoofer sounds distorted trying to "play up" to meet the midrange. This
may require a gap or difference between the high and low settings. Although not ideal, this
is sometimes necessary to make the system work as well as possible.
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-8-
Setting the Front and Rear Output Levels
SPECIFICATIONS
Before setting front and rear level controls, disconnect the subwoofer output and follow the
directions below.
Power Source:
Input current:
Distortion:
Frequency Response:
S/N Ratio:
Separation:
Crossover Slope Rate:
Input Impedance:
Output Impedance:
Output Gain:
Output Voltage level:
Dimensions:
1. Be sure the front and rear High-Pass crossovers are set properly.
NOTE: When the SP-XO03 dBPRO is used in a 3-way system, the front outputs must be
connected to the tweeter amplifier and the rear outputs must be connected to the midrange
amplifier.
2. Turn the front and rear output level controls to their minimum setting.
3. Turn the amplifier gain controls to their minimum setting.
4. Turn the source unit on and increase the volume until distortion is heard, then reduce
volume to just below this point.
NOTE: This is the maximum usable musical signal for this source unit. turning the volume
beyond this point will increase noise and distortion without an increase in musical signal. If
you can increase the source unit volume to maximum without audible distortion, raise the
output level controls slightly and begin again.
14.4 volts DC negative ground
0.5 amp max
0.01% THD at 1V output level
10Hz - 30KHz +/-3dB
>100dB
60dB
18dB per octave
20K Ohms
100 Ohms
1:2 (+6dB)
9 volts max
142mm x 170mm x 46mm
5. With the amplifier gains still at minimum and the source unit set at maximum volume without distortion, raise the front and rear output level controls until distortion is heard, then
reduce the gain to just below this point. This is the maximum output level for this system.
For best performance do not increase beyond this point.
Setting the Sub Output Level
1. Make sure all outputs are connected and both the front and rear output levels are set
correctly. Unplug the Remote Sub Level control cable.
2. Be sure the sub output level and amplifier gains are at their minimum settings.
3. With the volume set at a medium level, slowly increase the sub level control to the point
where the subwoofer volume blends with the system.
4. If maximum sub output level does not provide enough subwoofer volume, slightly
increase the subwoofer amplifier gain until desired level is reached.
5. Fine tune the bass response using the Sub Boost Controls.
Trouble Shooting Guide
If the unit does not turn-on, and / or the power indicator LED is NOT
illuminated, do this:
1) Check and make sure that B+ and GND are not reversed
2) Check that all power wires are properly connected and has
the appropriate potential (11- 16 volts)
3) Check that the fuse is intact.
6. Plug the Remote Sub Level Control cable back into the SP-XO03 dbPRO crossover.
If you experience high audible distortion or low output volume:
Setting the Sub Boost Level
1. Initially set the sub boost level to its minimum setting (i.e. 0dB).
2. Listen to a variety of music styles (e.g. Rock, Rap, etc.) and slowly increase the Sub Boost
Control until a noticeable increase in low bass response is perceived.
3. Slowly adjust the Sub Boost Frequency control (up or down) to realize the best bass
response.
4) Check that the input and output levels are set correctly. Input should
match the source and output should match the sensitivity of the host.
5) Check the crossover settings; make sure they are correct; for high "Q"
systems, set the crossover half an octave above the desired point and for
low "Q" systems, set it 1 octave or more above.
If you experience whining or engine noises:
CAUTION: This feature can make a subwoofer put out more energy at very low frequencies.
Be cautious with this control because with too much boost at low frequencies the power
handling of the subwoofer will be decreased. This is a subjective setting and will depend
on your personal listening preferences. If you hear a "pop" (due to speaker over-excursion),
lower the Sub Boost to prevent speaker damage. If the system sounds muddy and distorted
(due to amplifier clipping), lower Sub Boost to avoid shutdown from overheating.
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6) Verify that the GND connection is secure and the conductor (wire) is not
too thin and unnecessarily long.
7) Check that the B+ wire is not too thin and unnecessarily long.
8) Change the power source; try taking power from a different point.
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