Related Manuals for Blaupunkt VPC 8D
Summary of Contents for Blaupunkt VPC 8D
- Page 2 Tipos de caja del altavoz para bajas frecuencias Construccidn de la caja del altavoz para bajas frecuencias Principios de instalacidn del sistema Apoyo Tecnico especificaciones tecnicas y diseiios recomendados de la saja Blaupunkt hoja de resumen de apoyo tecnico (hoja fax) Otras notas...
- Page 3 SUBWOOFER ENCLOSURE CONSTRUCTION reviewing basic box building techniques. INSTALLATION GUIDELINES examines additional automotive installation concerns and o learn more about car audio. BLAUPUNKT WARRANTY INFORMATION for the applicable country is noted. BLAUPUNKT TECHNICAL SUPPORT provides telephone and fax support numbers and addresses with the BLAUPUNKT TECHNICAL SUPPORT SUMMARY SHEET formalizes your tech requests so they can be mailed in and/or faxed in to our technical support people.
- Page 4 SUPERIOR PERFORMANCE PARAMETERS for the new VPC units were strategically balanced so that low resonant frequencies could be achieved along with high sound Cone mass is held to a minimum for high efficiency yet its Acrylic Resin pressure levels. Laminate (ARL) design yields tremendous rigidity. The lighter the cone the easier it is for the magnet to move it in and out;...
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Page 5: System Planning
SYSTEM PLANNING The largest possible impact on any audio system (home or car) is the quality of loudspeakers used and their placement. EFFICIENCY defines how loud a speaker will play for a given input power and is often quoted at 1 watt input and measured at a 1 meter distance. -
Page 6: Thiele-Small Parameters
Economy Mode Limited Space Mode HI-SPL Mode a woofer cone e movement 0 e woofer cone back and forth. If 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 canceled thus substantially reducing the bass output of the speaker. - Page 7 COMMON ENCLOSURE TYPES In the car audio world there are 5 types of subwoofer enclosures commonly used; INFINITE BAFFLE, SEALED BOX (closed box), VENTED BOX (bass reflex), SINGLE-VENTED (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.
- Page 8 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.
- Page 9 During box construction, temporarily assemble the box to make sure all pieces line up properly. Then assemble all pieces before cutting out the holes for the woofers. Once the box is fully assembled, connect an oscillator/amplifier to the woofer, sweep it through 20- 100 Hz, and listen for strange air whistling noises, buzzes, and rattles.
- Page 10 We recommend that you have your Blaupunkt woofers professionally installed. If you choose to do your own installation please note the following important information. Before cutting any trim or steel make sure you clear all moving parts and factory electrical lines.
- Page 11 To obtain performance of this warranty, contact the nearest Blaupunkt dealer. A dated purchase receipt or other proof that the product is within the warranty period will be required in order to honor your claim.
- Page 12 Nominal diameter 8.0 in (2OOmm) Magnet weight 20 oz (0.56kg) (210 Nominal impedance 4 Q (ea. coil) DC resistance (Re) 2.36 f2 (ea.) 41 Hz Resonance frequency (fs) Total 0 factor (Qts) 0.45 8.50 Mechanical Q (Dms) 0.48 Electrical Q (QesI Equivalent air volume (I/as) 0.85 ft3 (23.9 ltr’s Air volume displacement...
- Page 13 VENTED BOX, 0 . 5 v s . 1.0 cu.ft. SINGLE-“ENTED BOX, vs. 1.5 cu.ft. 0.50 6.20 15.30 0.25 15.40 0.30 0.70 5 cu.Pt. 0.95 7 2 0 0 3 0 1.25 9.70 0.25 box configurations. Be sure to account for the air volume displacement of the woofers and the port tubes. 1...
- Page 14 IO” SUBWOOFER - TECHNICAL DATA * DC resistance (Re) Electrical Q (Qes) Equivalent air volume (Vas) 1.90 ft3 (53.8 ltr’sl Air volume displacement 0.14 ft3 (4.0 hYs) wooter outllne drawing Effective cone area (Sd) 56.7 in2 (0.037m2) Compliance (Crns) Moving mass (Mms) 2.4 oz (67n) Voice coil former material Kapton polymide...
- Page 15 SEALED BOX, VENTED BOX, 0.5 vs. 1.5 CU.ft. 1.25 1.75 cu.it. box configurations. Be sure to account for the air volume displacement of the woofers and the port tubes. 1...
- Page 16 12” SUBWOOFER - TECHNICAL DATA * Nominal diameter 12.0 in (3OOmm) Magnet weight 40 oz (1.14kg) 12.20” (310 Nominal impedance 4 Q (ea. coil) DC resistance (Re) 2.90 Q (ea.) Resonance frequency (fs) 35 Hz Total Q factor (C&s) 0.42 Mechanical 0 (Qms) 8.14 5.60”...
- Page 17 SEALED BOX, 0.75 vs. 2.0 cu.ft. VENTED BOX, 0.75 vs. 2.0 cu.it. SINGLE-VENTED 1.75 vs. 3.5 cu.ft. 1.75 Cu.ft. 3.5 cu.ft. box configurations. f3e sure to account for the air volume displacement of the woofers and the port tubes. ]...
- Page 18 15” SUBWOOFEB - TECHNICAL DATA * Nominal diameter 15.0 in (38Omm) Magnet weight 40 oz (1.14kg) 15.20” (386 mm) Nominal impedance 4 f2 (ea. coil) DC resistance (Re) 3.08 R (ea.) Resonance frequency (fs) 25 Hz Total Q factor (C&s) 0.46 Mechanical 0 (Qms) 8.50...
- Page 19 SEALED BOX, 1.5 vs. 3.0 Cu.ft. VENTED BOX, 1.5 vs. 3.0 Cu.ft. 0.75 1.00 1.50 155 140 111.15 3.5 vs. 6.0 cu.ft. 2.25 120 70 0.75 1.75 3.80 6.90 box connations. Be sure to account for the air volume displacement of the woofers and the port tubes. 1...
- Page 20 1. What enclosure type do you have or want? vented isobaric 2. What Blaupunkt woofer model numbers are you working with? 3. How many woofers are in the same cabinet 4. How many port tubes do you have or want? Diameter and length of each? 5.
- Page 22 Robert Bosch Corporation Sales Group - Blaupunkt Division 2800 South 25th Avenue, Broadview, Illinois 60153 Division Blaupunkt de Robert Bosch Inc. Mississauga, Ontario Canada L5N IRI Copyright 1993 by the Robert Bosch Corporation No portion of this work may be reproduced in any form without the written consent of the Robert Bosch Corporation Printed in the U.S.A.