Blaupunkt VXW 300 VELOCITY Bruksanvisning
Blaupunkt
Bil högtalare
VXW 300 VELOCITY
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Notes on installation and operation
Hinweise zur Installation und Bedienung
Conseils pour l’installation et l’utilisation
VXW 250, VXW 300, VXW 380
D
F
GB
2
Thanks for choosing
Velocity!
Congratulations on your purchase of your new
Velocity
product! We have invested tremendous effort
in the de-sign process of the new
Velocity
subwoofer series, in order to achieve superior musical
performance.
For maximum performance and reliability we highly recommend that your new
Velocity
subwoofers
be installed by an authorised Velocity dealer. By using our
Velocity
line component speakers and
amplifiers you can be as-sured of making the best out of your high-quality audio hi-fi system without
spoiling the sound by using com-ponents of inferior quality.
For additional information on the
Velocity
Product Line (technical data, user notes and soon also a
simulation programme for subwoofer housings) visit our Internet site at: http://www.velocity.de.
NEW COMPONENT FEATURES
High Power handling
Incredibly flexible installation: The new
Velocity
subwoofers perform well in sealed, vented and
bandpass boxes.
Due to the low resonance values, the new
Velocity
subwoofers also work well in infinite baffle
installations in which the woofer is mounted on the rear deck, using the trunk of the car for its acoustical
enclosure.
New ultra-linear long-throw suspension.
Corrugated mica polypropylene design yields tremendous rigidity.
Additional loudness is achieved through longer cone travel, so we designed the
Velocity
subwoofers-
with 6 to 9 mm peak-to-peak excursion.
The new reinforced spider renders spider tears a thing of the past.
Butyl rubber surrounds offer linear cone movement without compression or the risk of tearing from
over-excursion even for longer cone travel.
New strontium ceramic ferrite magnets yield smaller magnet sizes without reduced magnet strength
but retain their magnet power far beyond the expected life of the woofer.
Four layers of high-temperature wire on DuPont Kapton Polyamide voice coil bobbins allow for voice
coil temperatures exceeding nearly 225 degrees Celsius without damage.
Rear vented T-yokes allow fresh air to move in from behind the woofer to cool the voice coil.
Safety precautions
Before starting to mount your speakers, please read carefully the instructions on installation and
connection.
Disconnect the negative terminal of the battery before carrying out installation and connection work.
Observe the vehicle manufacturer’s safety instructions (regarding airbags, alarm systems, trip
computers, vehicle immobilisers).
When drilling holes, take care to avoid damage to vehicle components (battery, cables, fuse boxes).
Do not mount the subwoofer onto flexible rear decks (hatchback vehicles) or anywhere where they may
fall for-ward.
GB
8 622 401 256
3
DEUTSCH ENGLISH
FRAN AISÇ
DUAL VOICE COIL ADVANTAGES
The dual voice coil woofer is actually quite old in the home audio industry but still relatively new to the
car audio world. The largest advantage of the DVC woofer is in the flexibility in installation. In order to
raise the sound pressure level (loudness) in a car, you can either add more speakers or add more
amplifier power to drive a single speaker. Many cars cannot fit two subwoofers and their necessary
enclosure volumes but can easily fit large power amplifiers and a single woofer. Simply speaking, the
DVC woofer allows you to make up for speaker deficiencies with additional amplifier power.
SUBWOOFER ENCLOSURE TYPES
Sound is created by the movement of the woofer
cone back and forth. If a woofer cone moves
forward creating a positive pressure wave, this
same motion creates a negative pressure at the
back of the woofer. If these two waves combine
due to the lack of a wall separating the front of the
speaker sound from the back, the output from
the woofer is effectively cancelled thus substan-
tially reducing the bass output of the speaker.
This wall is absolutely necessary and is referred
to as an acoustical „baffle“. It can be accom-
plished using a box of some kind or simply the
rear package shelf of an automobile to isolate
the front and back waves of the speaker.
THIELE-SMALL PARAMETERS
Every woofer has its own electromechanical characteristics which are called THIELE-SMALL
parameters. The three most important parameters include RESONANT FREQUENCY („fs“- the
frequency where the speaker moves with the least mechanical resistance), TOTAL Q („Qts“- the
„magnification“ of the cone movement at its resonant frequency), and VOLUMETRIC COMPLIANCE
(„Vas“- the equivalent volume of air that the woofer cone can displace for a given power input). Using
these parameters we can then calculate an optimum box volume for a particular woofer and reasonably
predict its frequency response.
COMMON ENCLOSURE TYPES
In the car audio world there are five types of subwoofer enclosures commonly used: INFINITE
BAFFLE, SEALED BOX (closed box), VENTED BOX (bass reflex), SINGLE-VENTED BANDPASS
(often incorrectly referred to as „5th“ order), DUAL-VENTED BANDPASS (often incorrectly referred
to as „7th“ order). No single design is superior because each has its own compromise in performance,
power handling and design complexity. The bandpass name implies a „built-in“ acoustical response
which has a natural highpass response (@ 30 Hz for example) but also a lowpass response
suppressing high frequencies (e.g., > 80 Hz).
8 622 401 256
FRAME SURROUND
CONE
DUST CAP
FRONT PLATE
YOKE
VENT
VOICE COIL
SPIDER
MAGNET
Produktspecifikationer
| Varumärke: | Blaupunkt |
| Kategori: | Bil högtalare |
| Modell: | VXW 300 VELOCITY |
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