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BX-4EQ
4 BAND GRAPHIC EQUALIZER
BASS ENHANCER
,
Owner s Manual
and
Installation Guide
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Functions
3
2
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9
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6
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1. Inputs: The inputs of The BX-4EQ use a balanced input circuit to help minimize induced noise.
It is also designed to handle very high signal voltages up to 15 volts.
2. Outputs: These RCA connectors should be connected to the next component after the BX-4EQ
such as a crossover or amplifier. Just remember, the BX-4EQ should go inline before a crossover.
3. Power Connector
4. Master VolumeControl: This is themain control toadjust the outputlevel.
5. Preamp FaderControl: This control adjuststhe volume betweenthe front andrear output in
4-channel systems.
6. Subwoofer Volume Control: This adjusts thelevel of thesubwoofer output.
7. Para-Bass Controls: These 2 knobs control the Para-Bass functions of the BX-4EQ. The
SWEEP knob allows you to pick the center frequency that you want the BX-4EQ bass restoration
circuit to maximize. The WIDE knob adjusts how wide of a frequency range the BX-4EQ will effect.
8. The PFM Subsonic Filter Switch: The BX-4EQ utilizes a PFM Subsonic Filter Control which
will help with speaker control and amplifier power management. This PFM Subsonic Filter Control
is variable from 35Hz - 80Hz. On most systems, setting the control at 35Hz is fine. If you want
to protect your speaker system even more, you should try a higher frequency. Often a higher
frequency actually sounds louder and cleaner.
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9. Bass Maximizer Indicator: These two LED indicators flash when the bass maximization
circuit is activated.
10. Input Selector Switch: This switch selects the AUX or CD input.
11. FrequencyBand Controls : Adjusts (cut or boost) the level of the three (LOW/ MID/ HIGH)
frequency bands up to +/-18dB
12. Aux Input.
13. Input Grounding Selector: For most systems you can set this switch at the BALANCED
position. In some systems, the source unit may look for a ground through the RCA connectors.
In this event, you should go ahead and change the setting to the UNBALANCED position.
14. Ground Isolation Selector: Occasionally alternator whine may appear in a system
because the source unit and amplifier may use different grounding. To help in this situation,
we have provided alternative grounding selector.
15. Output Voltage: Not all systems are designed the same, some systems are designed
strictly for SPL (Sound Pressure Level) while others are a little more tame. The Bass
Maximizer circuit can either increase or decrease the signal voltage of the Bass Restoration
Circuit. Depending upon your system, you may change this selector switch to a higher or
lower setting to maximize your bass output and protect your speakers.
Electronic Connections & Wiring
Power connection
B+(12V) : Connect to the car battery or other power source.
REMOTE : Connect to remote activating (12V DC)wire of car stereo or equalizer.
GND
: Connect to the car chassis for ground connection.
Orange
Black
Red
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Signal Connection
AMPLIFIER
MIDRANGE
SPEAKERS
Crossover
AMPLIFIER
SUBWOOFER
NOTE: For signal connection, the output RCA connectors should be connected to the
next component after the BX-4EQ, such as a crossover, equalizer, or amplifier. Just
remember, the BX-4EQ should go inline before a crossover.
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Adjusting the Para-Bass Controls
The bass response in a system is affected by four factors:
(1) The acoustics of the vehicle
(2) The locations of the speakers
(3)The music material
(4) Speakers and speaker enclosures.
Because of the variations in the recording process, we developed BX-4EQ to help restore
any low frequencies lost during the recording process, however, the acoustics of various
environments are different.
The Sweep control allows you to select a center frequency ( the frequency most affected)
between 27 and 63 Hz. The Width control then allows you to control the shape of the filter
centered around the Sweep frequency.
Setting The Output Voltage
The BX-4EQ is the most powerful bass component. This device is equipped with several
different Bass Output selections. If you should need to change the settings, Please use
the chart below for guidance. It is recommended : listen to the factory setting before
changing your Bass Output settings.
Recommended Settings
Setting
2.5Volt
5Volt
Amplifier Input Voltage
3Volt or less
Minimum Speaker Size
8
5Volt or less
10
12
7.5Volt
10Volt
7.5Volt or less
Oh My Gosh !!!!!!!!!!!!!!!!!
Specifications
Maximum Input Level
15 V rms
Maximum Output Level
Frequency Response
Total Harmonic Distortion
Signal to Noise Ratio
13.5V peak
10Hz - 100KHz ; +/-1dB
0.003%
-130dB
Balanced Input Noise Rejection
Input Impedance
>60dB
10 Kohm
150 Ohms
Output Impedance
Power Supply
High headroom PWM
150mA
Power draw
Recommend fuse rating
1 Amp
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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.
If you experience high audible distortion or low output volume:
4) Check that the input and output levels are set correctly. Input should
match the source and output should match the sensitivity of the next
in-line component.
If you experience whining or engine noises:
5) Verify that the GND connection is secure, the conductor (wire) is not too
thin and unnecessarily long.
6) Check that the B+ wire is not too thin and unnecessarily long.
7) Change the power source; try taking power from a different point.
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