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8” SUBWOOFER   TECHNICAL DATA 

l

Nominal diameter

8.0 

in (200mm)

Magnet weight

2 0  

 

Nominal impedance

DC resistance 

(Re)

2.42 

Resonance frequency 

(fs)

44 Hz

Total   factor (Qts)

0.39

Mechanical 

 (Qms)

10.3

Electrical   (Qes)

0.41

 air volume 

(Vas)

0.86 

 (24.3 

Air volume displacement

0.06 

 (1.7 

Effective cone area (Sd)

33.2 

 (0.021 

Compliance 

(Cms)

4.0 x 

 M/N

Moving mass (Mms)

1 .o 

 

Voice coil diameter

1.5” (38.1 mm)

Voice coil former material

Kapton polymide

Voice coil induct’ce 

 1.20 

Linear excursion 

(Xmax)

0.20 in 

Force factor (BI)

6.9 Tm

Acoustical 

 (No)

0.59 %

Continuous power (Pe)

120W (240 peak)

Sensitivity (SPL)

93 

 

90 

 

Woofer outline drawing

 

 response

The PC 8 woofer offers the best performance/box size compromise using a simple 0.75

1.00 cubic foot Vented box. The Sealed box drives the -3dB frequency very high

 Hz). An Infinite Baffle mounting (rear package shelf) is recommended only for low

power systems 

 watts) due to possible over-excursion of the driver.

The Slngle-Vented 

 box offers a slightly lower -3dB frequency than the Vented

box but the efficiency will drop considerably. The Single-Vented 

 box should

erefore be used for installations requiring very high power handling 

 watts) yet

 the low cutoff frequencies offered by the Vented box.

l 

(Parameter values may deviate 

 in production 

 but the perceived performance variations will be negligible.)

Summary of Contents for PC10

Page 1: ...rofessional Quality Subwoofers Technical Manual For Manuel Tkchnique Pour Manuel Tbcnico Para PC PCIO Cl ad PC15 Rnsch Telecam ...

Page 2: ... conception recommandee des enceintes PC 10 specifications techniques et conception PC 12 specifications techniques et conception PC 15 specification techniques et conception Demande de soutien technique feuille de fax recommandee des enceintes recommandee des enceintes recommandee des enceintes PAGES 9 10 11 12 13 14 15 15 16 16 2526 27 28 29 30 31 32 33 TEMAS Nuevas Caracterkticas Pro Component ...

Page 3: ...d 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 Finally in depth TECHNICAL DATA for all PC woofers is provided High performance car audio can be achieved with value conscious components Simply speaking 95 of the car audio subwoofer installations made today really don t need 400 woo...

Page 4: ...lude the subwoofer speakers a dividing network must be installed that keeps the low frequencies out of the midrange speakers Two way crossovers have a crossover point set of 80 to 100 Hz for example You can go crazy with additional crossover points and amplifiers three way five way etc but these should be left to the better retail installers or high end hobbyists SOUND QUALITY VS SPL A well design...

Page 5: ...ching the rms continuous power levels to that of the speaker is important but it should be noted that under powering a system can often cause more damage than slightly overpowering it If the speakers are rated for 50 watts rms you can often drive them with a 100 watt power amp without concern IMPEDANCE is the electrical resistance to AC current flow and is typically 4 ohms for most car speakers Im...

Page 6: ...e only moderate efficiencies at low frequencies and the need for large box volumes VENTED boxes extend the low frequency response below that of the sealed box by using a port tube Advantaaes include extended low frequency response lower distortion due to smaller cone movements good efficiency good transient response moderate size boxes and high power capacity Disadvantages include increased comple...

Page 7: ...ild boxes with thicknesses of 5 8 314 12 16 mm Solid wood panels should actually be avoided because of vibration potential and wood warping over time H All seams in the box should be glued screwed and caulked to prevent wall separation over time due to vibration and environmental changes within the car n Cross bracing is important for large boxes to prevent wall vibration n Acoustical damping mate...

Page 8: ...ts work well BASIC MATH CALCULATIONS To build a subwoofer box some very basic math calculations must be made accurately referencing the formulas and drawings below ilrl w lYl c w vol uMEs 1 Itt 67 w 3 c w t _ _ D c d Speaker parameters and box calculations often need some kind of math conversions in order to make the numbers easy to work with Some common conversions are listed below VOLUME AND ARE...

Page 9: ...t systems interested in loudspeakers acoustics and electronics Subjective comments are listed accordingly DESIGNING BUILDING AND TESTING YOUR OWN SPEAKER SYSTEM David B Weems Copyright 1984 TAB books 1964 Blue Ridge Summit PA 17294 This is an introductory book on designing speakers for the home but is quite applicable to the car and is easy reading LOUDSPEAKER DESIGN COOKBOOK Vance Dickason copyri...

Page 10: ...imitations or exclusions may not apply to you This warranty gives you specific legal rights and you may also have other rights which vary from state to state This warranty is void for damage occurring during shipment and for products with defaced serial numbers or date code markings For further information regarding this warranty please contact the Blaupunkt division of the Robert Bosch Corporatio...

Page 11: ...eak Sensitivity SPL 93 dB 2 83v lm 90 dB lW lm Woofer outline drawing Anechoic wooter response The PC 8 woofer offers the best performance box size compromise using a simple 0 75 1 00 cubic foot Vented box The Sealed box drives the 3dB frequency very high 80 Hz An Infinite Baffle mounting rear package shelf is recommended only for low power systems 75 watts due to possible over excursion of the dr...

Page 12: ..._________________________ I t 10 1 0 cu ft I r __ M f l 4 O I 1 3 _ _ _ _ _ _ I 1 5 cu rt I 0 20 SO Im mz ma The data above is offered as a starting point for comparison purposes because these designs are only a few of many possible box configurations Be sure to account for the air volume displacement of the woofers and the port tubes NR NOT A RECOMMENDED APPLICATION 26 ...

Page 13: ...0 peak Sensitivity SPL 95 dB 2 83v lm 92 dB lW lm j e J Woofer outline drawing Anechoic woofer response The PC 10 woofer offers the best performance box size compromise using a simple l O 1 5 cubic foot Vented box The Sealed box pushes the 3dB frequency high 80 Hz but this unit will work well in an Infinite Baffle mounting car trunk if using levels cl00 watts rms to prevent bottoming of the woofer...

Page 14: ...oo am VENTED BOX 0 5 VI 1 5 cu ft 0 Y 20 a0 Im mz 2al am BANDPASS BOX 1 25 vs 1 75 cu ft ___ _ _ r rhe data above is offered as a starting point for comparison purposes because these designs are only a few of many possible box configurations Be sure to account for the air volume displacement of the woofers and the port tubes NR NOT A RECOMMENDED APPLICATION 28 ...

Page 15: ...dB 2 83v lm 93 dB lW lm t J lofer outline drawing I Anechoic woofer response The PC 12 woofer provides the best performance box size compromise using a 1 5 2 0 cubic foot Vented box The Sealed box designs drive the 3dB frequency high 70 Hz but the woofer cone has enough area that it will begin to pressurize the car interior therefore offering strong bass performance Infinite Baffle mounting rear d...

Page 16: ... 1 00 I58 I160 195 1050 1050 I700 I4 50 141 I 25 52 140 05 0 65 0 6 0 1 90 4 25 92 I 50 50 130 76 0 75 0 75 1 90 4 50 92 75 42 120 70 0 75 1 00 3 00 6 2 5 90 1 50 24 105 50 0 75 2 75 a 00 151 A d I SEALED BOX 0 75 vs 2 0 cu ft __ 20 SO 2m am VENTED BOX 0 75 8 2 0 cu ft BANDPASS BOX 3 5 CU ftz __ ___ _______ _ L_ ____ _i_________ 3 5 cu ft rhe data above is offered as a starting point for compariso...

Page 17: ...W 360 peak Sensitivity SPL 97 dB 2 83v lm 94 dB lW lm 6 70 ttm nmJ Woofer outline drawing FREBKNCY oiz I Anechoic woofer response The PC 15 woofer offers the best performance box size compromise using a 3 0 cubic foot Vented box The Sealed box pushes the 3dB frequency above 50 Hz but an Infinite Baffle trunk installation using the rear deck or back of the rear seats can offer tremendous results si...

Page 18: ... J m_ _ ____ __ 20 so zm am I BANDPASS BOX 3 5 vs 6 0 cu ft rhe data above is offered as a starting point for comparison purposes because these designs are only a few of many possible box configuralions Be sure to account for the air volume displacement of the woofers and the port tubes NR NOT A RECOMMENDED APPLICATION 32 ...

Page 19: ...ed other define bandpass i s o b a r i c 2 What Blaupunkt woofer model numbers are you working with y ow many woofers are in the same cabinet ow many port tubes do you have or want I Diameter and length of each Do you want round PVC pipe port tubes or square round What is the total cubic volume of the enclosure you have or want square Maximum h x w x d How much amplifier power are you applying to ...

Page 20: ...Avenue Broadview Illinois 60153 Division Blaupunkt de Robert Bosch Inc Mississauga Ontario Canada L5N IRl 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 PI 105 4 93 ...

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