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COMPUTER AIDED WOOFER

AND CROSSOVER DESIGN

ENCLOSURE

PURCHASE DATE:

VERSION NUMBER:

DISK SIZE

OWNER:

S T R E E T :

BLAUPUNKT DIV. BOSCH CORPORATION

2800 SOUTH 25TH AVENUE

BROADVIEW, IL 60153

l - 8 0 0 - 3 2 3 - 1 9 4 3

Содержание Blaubox

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Страница 2: ... CROSSOVER DESIGN ENCLOSURE PR dGRAM PURCHASE DATE VERSION NUMBER DISK SIZE 3 5 7525 OWNER S T R E E T _ CITY ST ZIP BLAUPUNKT DIV BOSCH CORPORATION 2800 SOUTH 25TH AVENUE BROADVIEW IL 60153 l 8 0 0 3 2 3 1 9 4 3 Copyright 1992 ...

Страница 3: ... SCREEN 4 CROSSOVER DESIGN 6 12 and 18 db octave lowpass filters 6 12 and 18 db octave highpass filters 16 16 SCREEN 5 PRINTER COLOR USER AND MATERIALS CONFIGURATION Screen color Dealer information install Customer information input Material thickness box material Printer setup 17 17 18 18 19 SCREEN 6 USING BLAUBOX Consumer guidance how to initiate him her to BLAUBOX Woofer choice Box style Fabric...

Страница 4: ...ON TIPS Design choice Materials selection Construction finishing and driver mounting Vehicle installation APPENDIX G BASIC CROSSOVER DESIGN Crossover networks passive and active Capacitors and inductors Highpass and lowpass frequency response Orders of response Crossover implementation 53 53 54 5 APPENDIX H SYSTEM DESIGN DISCUSSIONS System design dollars and sense Speaker choices locations and ins...

Страница 5: ...ct designed through utilization of Products This Limited Warranty is void if any nonconformity has resulted from accident abuse misuse misapplication Blaupunkt or modification by someone other than The Limited Warranty is non transferable THE EXPRESS WARRANTY IN THIS SECTION 2 IS A LIHITED WARRANTY AND IT IS THE ONLY WARRANTY MADE BY BLAUPUNKT BLAUPUNKT MAKES AND USER RECEIVES NO OTHER WARRANTY WH...

Страница 6: ...oxes where a little time spent experimenting with chamber sizes and tuning can improve the performance substantially Please bear in mind that BLAUBOX cannot foresee the resulting frequency response of the finished enclosure once it s installed in the car As with any speaker modeling program the acoustical transfer function the resulting frequency response and its amount of bass boost is different ...

Страница 7: ...QUICK START Insert the disk into the a drive of the computer and call up the a DOS prompt Type INSTALL and an installation instructions screen will appear Choose auto install or type in a preferred subdirectory for BLAUBOX to be installed in BLAUBOX will create its own subdirectory under your desired subdirectory called BLAUl Once installed type BLAUBOX to start the program HELP Fortechnical quest...

Страница 8: ...owinu 1 2 3 4 Make sure you have the proper floppy disk format for your computer drive 3 5 720k or 5 25 1 2mb Read the software license agreement before opening the disk envelope Record your name address and disk information on the inside cover of the owner s manual for future reference printed on the disk BLAUBOX version number is Record the appropriate information on the owner s registration car...

Страница 9: ...e helpful in speeding up the entry of data and or understanding the syntax used in the BLAUBOX owners manual If you are completely confused with BLAUBOX please call our 800 telephone number before you cause irreparable damage to your computer your ego your body or the Earth s ozone layer The ENTER command simply tells you to hit the enter key which is found on most PC keyboards on the far right si...

Страница 10: ...e debated the advantages of plotting displacement limited performance plots of speakers which clearly show the frequencies and power levels where a woofer starts to distort But this requires proper interpretation of the data by the user and a judgemental value what is tolerable for the consumer Because of possible misinterpretation we left it out of BLAUBOX but may include it in an upcoming versio...

Страница 11: ...us users may get their design confused with the previous user s The best solution is to have a master reset that can reset all parameters to zero or blanks and restart the program without exiting and transitioning back to DOS This feature is very useful considering the typical interruptions in the business day The next person can clear out the last values without restarting the computer If a menui...

Страница 12: ...e s SEALED BOX SEALED BOX Box 2 Type COMPUTER GENERATED OPTIMUM BOX SIZE Box 2 Volume 0 00 CU FT r y _ _ Pick Woofer l Fl q H E L P ESC Ignore BOX STYLE Here you choose the desired box style to use e g sealed box vented box or bandpags designs Move the cursor to highlight BOX STYLE hit ENTER and a window will open up asking if you want to choose a box style for WOOFER 1 and or WOOFER 2 Highlight t...

Страница 13: ...OPTIMUM BOX SIZE Box l Volume 0 00 CU FT Enter Box I P a r a m e t e r s Box Size Vf CTRL Enter A c c e p t U s e r S p e c i f i e s B o x l S i z e Fl H E L P ESC Ignore BOX MATH BOX MATH is a handy calculator used to convert dimensions and volumes common to the speaker engineering area such as liters and cubic feet To enter this function highlight BOX MATH hit ENTER and a window will give you s...

Страница 14: ...ow will open up asking CRT Plot or Printer Plot If CRT is chosen the frequency response plot will be drawn on the monitor If Printer Plot is chosen the frequency response will be sent to the printer Print times will average about 2 minutes per page because of the intense graphic routines substantially longer times are likely using a Laserjet printer BLAUPUNKT BOX RESPONSE PROGRAM WOOFER 11 BIAU AC...

Страница 15: ...C MAIN MENU MODIFY DIMENSIONS Here you can modify the box dimensions to fit a particular space Move the cursor to highlight MODIFY DIMENSIONS and hit ENTER A window will open up showing a box volume that comes from Screen 1 and then asks for the modified dimensions Using the tubular example above the optimum volume is shown and this volume must be noted mentally or on paper You now enter a number ...

Страница 16: ...0 IN Port Length 1 79 IN 318 0 375 112 0 5 5 a 0 625 3 4 0 75 7 a 0 875 CtrI ENTER Accept Material Thickness 0 750 INCHES F5 Select Box l Choose Port Sizes Fl HELP ESC MAIN MENU BOX MATH _ This is the same calculator as inside Screen 1 which allows you to convert dimensions and volumes commonly found in the speaker building process To enter BOX MATH highlight BOX MATH hit ENTER and a window opens ...

Страница 17: ...ise the program may crash and you will have to restart Regarding printing to paper patience is in order for the Laserprinter owner As with any graphics intensive program talking to a Laserprinter it can take considerable time to finish all copies We recommend that you make preliminary prints in the 75 DPI setup in order to obtain prints in about 2 minutes per page About 4 minutes per page is requi...

Страница 18: ...ER Here you can modify the Thiele Small parameters for a woofer To prevent accidental erasure or modification of the pre installed Blaupunkt woofers their parameters are hard installed so they are non changeable To modify a wobfer move the cursor to highlight MODIFY WOOFER and hit ENTER A window will open up showing the various woofers in alphabetical order Cursor left right and up down using the ...

Страница 19: ...ype in the woofer name and its model number immediately next to it and hit ENTER cursor will step down asking for the Qts parameter The only show Qes and Qms parameters Now if your woofers highlight the window stating Total Qt hit the space bar to toggle out of Qts and you will see the highlight ba showing Separate Qes and Qms Now hit ENTER and the comment areas for entering Qes and Qms will open ...

Страница 20: ...R K D E S I G N n I 6DB HP IZDB LP IZDB HP 18DB LP 18DB HP Crossover Type 6 db octave Low Pass Termination Load Ohms 4 0 0 Crossover Frequency 80 __ _ ___________________________ _ L o w P a s s Ll mH 7 9 6 SPEAKER FlO Calculate ESC Quit Type 1 6 db octave l o w p a s s Fl HELP ESC MAIN MENU 6DB HP 12DB HP 18DB HP Highpass crossovers1 Using the cursor keys highlight the desired crossover slope hit...

Страница 21: ...ort is toggle the mouse on or off and hit CONTROL and ENTER at the same time and these choices will be set in memory BLAUPUNKT BLAUBOX Screen 5 CONFIGURE SCREEN PRINTER DEALER INFO 1 SCREEN COLOR j DEALER INFO CUSTOMER INFO MATERIAL PRINTER Screen Color Mono and Mouse Support Screen Type Default Mouse Support ON Use SPACE BAR to select CtrL ENTER Accept ESC Ignore Set Screen Color Mono Mouse On Of...

Страница 22: ...r Name Fl HELP ESC q MAIN MENU MATERIAL This function allows the user to set the material thickness used to build the box 3 4 particle board is most common so BLAUBOX defaults to this but it can be changed to any standard thickness varying from l 8 to 7 8 To change the lhaterial thickness default from 314 to another value move the highlight bar to the right using the cursor arrow keys and highligh...

Страница 23: ...ommon on PC s printers But if this is used by other LPT2 a second printer port can be used if the machine has it namely Once the printer type and port are defined simply hit the CONTROL and ENTER keys at the same time to store them in memory As previously mentioned although Laserjet printers offer excellent print quality a trade off exists regarding time to print from BLAUBOX as with any graphics ...

Страница 24: ...ow frequencies thus allowing it to bottom out on peaks and possibly destroy itself WOOFER CHOICE Here you can make some decisions on which woofer to use Some woofers can offer significant benefits over other units 1 Woofer size want does the user really want bigger s bt ter The mistaken concept of remains horribly rampant Very often a smaller woofer in a given box will provide a lower cutoff frequ...

Страница 25: ...r frequency response and higher efficiency than the above boxes but it is very sensitive to lousy construction techniques Like simple vented boxes it will become unloaded below the 3db frequency but with higher distortion and more devastating results when the woofer fails FABRICATION of the final box FABRICATION is a short discussion of the various box designs and their final fabrication 1 2 3 4 5...

Страница 26: ...ear sound over frequencies of 20 Hz to 20 000 Hz A piano will reproduce sound from about 50 Hz to over 10 000 Hz in the harmonics We can hear sound over a huge range in Loudness Most people with good hearing can recognize sound as Low as 0 db the threshold of hearing At about 120 db perm anent hearing Loss occurs many rock concerts average this leveI in the front rows The 120 db range of loudness ...

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