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Specifications
Frequency Bands
Boost/Cut
SUB 50Hz, LOW 210Hz, MID 1KHz, HIGH 20KHz
+/- 18dB
Signal-To-Noise Ratio
Frequency Response
Maximum Output Voltage
Total Harmonic Distortion
Input Sensitivity
110dB Ref 1V Input
10Hz-15KHz, +/-1dB
7V rms
0.05%
150mV
Headroom
20dB
Input Impedance
Stereo Separation
Operating Voltage
10K ohms
82dB/1KHz
11-15V Negative Ground
EQUALIZER BACKGROUND
There are basically three types of equalizers: graphic, parametric and a
hybrid of these two,often referred to as paragraphic. Additionally, there are
passive equalizers, which have no gain, active gain preamps, which have a
gain stage usually with a volume control, and booster equalizers which we
won,t consider here since they are inferior passive equalizers with
inexpensive IC amplifiers built-in.
As in state-of-the-art home audio systems the optimum system requires a
dedicated preamp with enormous gain to drive the various power amplifiers.
Since home audio amplifiers do not have adjustable sensitivity, the require a
high output preamplifier to drive them to maximum levels.
This unit is the first production preamplifier to incorporate a specific
bandwidth parametric equalizer with shelving control. With 18dB boost or
cut on its four bands, it can compensate for acoustic anomalies unique
to the automotive environment. The Vibe 440PSU easily becomes the
Control Center of any high-end mobile entertainment system.
2
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Controls (front panel)
10
1. PREAMP FADER CONTROL:
This control adjusts the volume between the front and rear output in 4-channel
system.
2. MASTER VOUME CONTROL:
This is the main control to adjust the output level.
3. SUBWOOFER VOLUME CONTROL:
This adjusts the level of the subwoofer
output.
4. SUBWOOFER FREQUENCY CONTROL
5. FREQUENCY BAND CONTROLS:
Adjust (cut or boost) the level of each frequency band up to +/-18dB.
6. INPUT SELECTOR SWITCH
This switch selectsthe AUX input.
7. INPUT SELECT FOR SD/USB OR AUX.
8. USB INPUT JACK
9. S/D CARD INPUT JACK
10. SD / USB CONTROLS
a: PREV - Previous play
b: NEXT - Next play
c: PLAY/PAUSE
d: VOL- - Decrease volume of SD/USB signal
e: VOL+ - Increase volume of SD/ USB signal
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Controls (Top Cover)
11. Independently adjust the left and right channel input sensitivity for each
input (Source and Auxilairy)
Turn the knob clockwise to increase the input level.
Turn the knob counter clockwise to reduce the input level.
4
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Controls (Rear Panel)
7
8
9
INPUT
INPUT
FRONT
REAR
AUXILAIRY
SOURCE
B+ (Red)
5
6
REMOTE (Blue)
GROUND (Black)
(Green)
(Green/White)
4
(Gray)
(Gray/White)
1.12V Constant Power Lead (red): This is themain power input for the Vibe 440PSU and must be
connected to a (+)12V constant power supply. DO NOT connect this to a switched 12Vsource or
the system may pop when the key is turned off.
2.Remote Turn-On Input Lead (Blue): This is the input for turning on the Vibe 440PSU and system
amplifiers. It should be connected to the (+)12V remote turn on output of the system head unit. The
Vibe 440PSU has a built in turn off delay to prevent turn-off pops. When the remote turn on signal
from the head unit shuts off, the amplifiers will turn off immediately and the Vibe 440PSU will stay
on for five seconds before turning off. This feature is designed into the Vibe 440PSU to eliminate
system turn off pops that can occur when several components turn off at the same time. DO NOT
connect this to a (+)12V constant power supply.
3.Ground (black): Connect this terminal to a qualityground location, preferably the chassis of the
head unit, which must itself be properly grounded tothe vehicle chassis. It is not recommended
that the factory radio ground be used for after-marketaudio components.
4. High level connection cables: Most aftermarket audiohead unit have RCA (low-level) outputs.
Plug the RCA output from the source unit into the RCA input of the Vibe 440PSU. If your
audio source unit does not have RCA outputs, the Vibe 440PSU has the capability to accept high
level (speaker level) inputs.
5.SOURCE Input: These are the pre-amp stereo RCA audio inputs to be connected to the source
unit's front pre-amp outputs.
6.AUX Input: These are the pre-amp stereo RCA audio inputs to be connected to secondary source
unit, or auxiliary device's pre-amp outputs.
7.Sub Out: These are the pre-amp RCA audio outputs for sending the audio signal to the
subwoofer amplifier.
8.Front Output: These are the pre-amp stereo RCA audio outputs for sending the audio signal to the
front speaker amplifier.
9.Rear Output: These are the pre-amp stereo RCA audio outputs for sending the audio signal to the rear
speaker amplifier.
5.
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Installation Instructions
1.Read thismanual carefully andin its entiretybefore installing thisequalizer.
2.Always disconnectthe battery orremove the fusesfor circuits youwill be workingon.
3.Check for clearance of any hazards such as wiring harnesses or heater core before
mounting the equalizerto any panelsin the vehicle.
4.Mount the equalizer in a location that is easy to access and won't be distracting to
vehicle operation whilemaking adjustments.
5.Route all power wires and audio cables away from sharp metal edges that can cause
shorts to ground and any moving parts that can tangle the wires such as heater controls
or wiper motors.
6.Route allpower and signalcables as faras possible fromother vehicle wiringharnesses.
Loom when appropriate.
7.It is recommended that the equalizer be grounded directly to the chassis of the head
unit. The head unit should be grounded at a chassis point (preferably bare or scraped
sheet metal) otherthan the factoryhead unit groundwire or underdash brackets.
8.Use only thesupplied machine screws to mount the equalizer ordamage to the circuitry
could occur.
6.
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Initial Settings
1.After completing unit installation, wire, and appropriate audio signal connections, power-up
the source unit, play a familiar track, and set the volume level to approximately 75%.
2.Set all individual Graphic Equalizer Controls to 0dB. Master Volume Control and Subwoofer
Level Control should be set to minimum, and fader set to even.
3.Press the Input Selection Switch to accept the input signal from the source unit or auxiliary
source.
4.Set the CDGain Selector setting appropriate to the pre-amp voltage ofyour source unit.
Most source units provide 2V-4V pre-amp power. In this case, setthe CD gain sensitivity to
MID. If your source unit pre-amp voltage is higher, set the CD gain sensitivity to HI; if the
voltage is lower, set the CDgain sensitivity to LOW. We recommend you never set the CD
gain sensitivity to LOWwith a source unit that provides ahigher pre-amp voltage. Thiscan
create unwanted levels of distortion and possible damage to your Vibe 440PSU.
5.Set the Subwoofer Frequency Selector switch to the desired low-pass filter. Generally, the
low-pass filter is set to 128Hz, and then the subwoofer amplifier's low-pass filter is fine tuned
for the desiredresponse.
6.Adjust the Subwoofer Level Control to achieve the desired tonal balance between the front/
rear speakers andthe subwoofer level.
7.Adjust the various individual Graphic Equalizer Controls to increase or decrease the output
level of eachfrequency to achievethe desired responsefor the frontstage and rearfill.
- end -
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