GB
acoustic performances: use high-density wood, MDF, multilayer sea wood, etc.
•
After finishing your reflex box, please test it into your car compartment by changing
the port length and, thus, frequency, or the quantity of sound-proof material in
the enclosure. This is the only way to be sure you get the acoustic results you want.
By making the port shorter or decreasing the quantity of sound-proof material,
you increase frequency and get clearer, crisper bass; vice versa, bass will be
deeper but less sharp.
Choosing your cable
(see page: Choosing your cable)
Power cables are extremely important since they directly affect the system damping
factor; in the enclosed table, we show cable diameters, which we recommend according
to length and applied power.
Tuning
After finishing your box and installing it into your car, you need to spend some time
to tune your system and calibrate your amplifier:
•
The amplifier gain level should be adjusted in order to keep power in a linear
functioning area, without distorsions or saturation that might damage the speaker.
•
Cut-off frequency should be between 80 and 50 Hz, according to the configuration
you use (direct emission like Sealed Box and Reflex Box or indirect emission like
Asymmetric Bandpass or Double Reflex).
•
If possible, use subsonic filter by setting its cut-off frequency around 25 Hz.
•
Avoid to use loudness or equalisers at low frequencies (<150 Hz):
ENERGY ES
subwoofers have full, flat response and don’t need any corrections, that might
cause the amplifier saturation or distorsion.
•
The subwoofer connection phase determines acoustic results and needs to be
tested by being listened to. It might be necessary to invert it according to configuration,
main speakers and other electronic devices in the system. Make some listening tests
in both ways and choose the solution you prefer. See page Installation patterns -
Electric connection in phase and out of phase.
•
You can adjust bass also by changing the subwoofer position inside the trunk.
It is extremely difficult to know in advance the results you will get in your car
compartment and you’d better make some tests by moving the subwoofer box
and the port and speaker emitting direction. See page Installation patterns -
Placement.
Warning
•
In order to avoid possible damages, keep all components in their package until
you install them.
•
Always wear protective eyewear when using tools that may generate splinters.
•
Before you start your installation, turn off the head unit, the amplifier if you have
one, and all electrical devices in your audio system, in order to prevent any damages.
•
Make sure the location you chose for your speakers doesn’t hinder the correct
functioning of all mechanical or electric devices in your car.
•
Don’t put cables close to electronic gearcases.
•
Use extreme caution when cutting or drilling the car plate, verifying there are no
electrical wiring or structural elements underneath.
•
Protect conductor with a rubber ring if wires pass through a hole in the plate or
with proper materials if they pass close to heat-generating parts.
•
Firmly fix your subwoofer box to the vehicle chassis through brackets, screws,
nuts and bolts, to guarantee stability and safety while driving.
Warranty restrictions
Please carefully read warranty terms and keep both the manual and the original box.
HERTZ
has restricted warranty, according to the terms written below:
Warranty duration: 2 years.
This warranty is valid only for
HERTZ
products sold by
HERTZ
authorised dealers.
Products found to be defective during the warranty period will be repaired
or replaced with an equivalent product at
HERTZ
’s discretion.
Warranty is void:
1. For damages caused by accidents, abuse, improper operation, water, theft.
2. If after sale service is performed by anyone other than
HERTZ
authorised service
centers.
3. If serial number has been spoiled, altered or removed from the product.
4. For damages caused by overdriving or excessive distorsion due to non-linear
functioning of power supply.
HERTZ
accepts no liabilities for possible damages that result from disregarding
what is written in this manual.
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