User manual BLAUPUNKT VELOCITY VW 380

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Manual abstract: user guide BLAUPUNKT VELOCITY VW 380

Detailed instructions for use are in the User's Guide.

[. . . ] Com We provide a manufacturer guarantee for our products bought within the European Union. De or ask for them directly at: Blaupunkt GmbH Hotline Robert-Bosch-Str. [. . . ] Advan-tages include extended low frequency response, lower distortion due to smaller cone movements in its passband, good efficiency, good transient response, moderate size boxes and higher power capacity. Disadvantages include increased complexity in box design and possible woofer damage due to over-excursion of the woofer cone below the cut-off frequency of the vented box. D) are relatively new (about 5 years in the car) but offer some advantages of both the sealed and vented designs. Advantages include reasonable efficiency, small box volumes, good transient response, extended low frequency performance and can be used with very high power amplifiers. Disadvantages include slightly lower efficiency compared to a vented box and increased complexity in box design and construction. E) vent the sound from the front and back of the woofer through individually tuned enclosure on the front and rear of the woofer. The advantage of this design is its high efficiency over a narrow frequency band. Disadvantages include complex design and construction, large box volumes, poor transient response and susceptibilities to cone over-excursions (damage) for sound outside its primary frequency band. ISOBARIC WOOFER CONFIGURATIONS Increasing in popularity in recent years is the compound woofer design, more commonly known as the "Isobaric" design. Isobaric actually means "constant pressure" which is the case having two woofers moving an encapsulated pocket of air between them in the same direction. This arrangement acts like a single speaker which effectively reduces the required box volumes for a subwoofer system by 50% which is substantial if you are space-limited. Unfortunately, the trade-off for space is the 3 dB loss in efficiency but this is usually recovered with increased amplifier power. Care must be taken to avoid air leaks between the two woofers and final speaker wiring and impedance loads must be carefully watched. SUBWOOFER ENCLOSURE CONSTRUCTION Before starting final box assembly some basic construction issues should be mentioned: ­ Infinite baffle construction in a car is done by simply cutting a piece of wood which will act as an acoustical divider isolating the front and rear sound of the woofer. [. . . ] To dispose of the product, please use the available waste return and collection systems. Nominal diameter Nominal impedance DC resistance (Re) Resonance frequency (fs) Frequency Response Total Q factor (Qts) Mechanical Q (Qms) Electrical Q (Qes) Equivalent air volume (Vas) Effective cone area (Sd) Voice coil diameter Voice coil former material Linear excursion (Xmax) Continuous power (Pe) Sensitivity (SPL) 10. [. . . ]

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