ÿ(a‹�---------LOUDSPEAKER DESIGN PROGRAMS---------”‹�---------WRITTEN BY ROBERT L. CAUDLE---------Ç‹�------------BASED ON EQUATIONS OF------------ú‹�---------D.B. KEELE AND RICHARD SMALL--------,Œ �---------TRANSFERRED TO THE PX-8 BY---------^Œ �-------------MICHAEL MONTGOMERY-------------¨Œ:�éFS=FREQ. OF FREE-AIR RESONANCE QTS=RESONANCE MAGNIFICATION AT FSâŒ:�éVAS=DRIVER COMPLIANCE OF AIR VOLUME VB=BOX VOLUME�:�éFB=BOX RESONANCE FREQ. F3=SYSTEM CUT OFF FREQ.e�:�éPROGRAM TAKEN FROM 'RADIO SHACKS BOOK"BUILDING SPEAKER ENCLOSURES"--€�:�é--CAT.NO.62-2309---Œ�† M(È)À�(Í:‘ Þ)"LOUDSPEAKKER SYSTEM DESIGN PROGRAMS":‘Ü�2‘"1. DRIVER PARAMETERS"ø�<‘"2. VENTED BOX DESIGN"ŽF‘"3. CLOSED BOX DESIGN""ŽP‘"4. END"=ŽZ…"SELECTION (1-4) >";PMŽd‹ Pð Ý Œ]Žn‹ Pð Ý mŽx‹ Pð Ý Z{Ž‚‹ Pð Ý ��ŽŒÍ:‘ Þ)"DRIVER PARAMETERS":‘¯Ž–L$ð"N":R$ð"N"ËŽ …"ENTER DRIVER NAME";D$ùŽª…"ENTER D.C. RESISTANCE OF VOICE COIL";RE�´…"ENTER FREE-AIR RESONANCE";FSN�¾…"ENTER IMPEDANCE AT FREE-AIR RESONANCE";ZMAX]�ÈROðZMAXõREn�ÒRFðÿ‡(RO)ôRE��Ü‘"ENTER FREQ. BELOW FREE-AIR =";RF;"OHMS";¦�æ… F1Õ�ð‘"ENTER FREQ. ABOVE FREE-AIR =";RF;"OHMS";Þ�ú… F2ø�QMSðFSôÿ‡(RO)õ(F2óF1) �QESðQMSõ(ROó)%�QTSðQMSôQESõ(QMSòQES)F�"…"ENTER TEST BOX VOLUME";TVBt�,…"ENTER DRIVER RESONANCE IN TEST BOX";TFS—�6VASðTVBô(n�ô((TFSõFS)öó))»�@Í:‘ Þ)"DRIVER PARAMETERS":‘:‘Ä�J‘ D$ñ�T‘"VOICE COIL RESISTANCE(RE)=";RE;" OHMS"‘^‘"FREE-AIR RESONANCE(FS)=";FS;" HZ")‘h‘"QMS=";QMS9‘r‘"QES=";QESI‘|‘"QTS=";QTSZ‘†‘"VAS=";VAS,“‘�…" LINE PRINT OUTPUT (Y)";L$¦‘š‹ L$ñï"Y"Ý ôÄ‘¤ž Þ)"DRIVER PARAMETERS"Ñ‘®ž:ž:ž D$ÿ‘¸ž"VOICE COIL RESISTANCE (RE)=";RE;" OHMS"(’ž"FREE-AIR RESONANCE (FS)=";FS;" HZ"8’Ìž"QMS=";QMSH’Öž"QES=";QESX’àž"QTS=";QTSh’êž"VAS=";VAS…’ô…"ANOTHER DRIVER (Y)";R$˜’þ‹ R$ð"Y" Ý Œ¢’‰ (Ä’Í:‘ Þ)"VENTED BOX DESIGN":‘Ï’L$ð"N"å’&…"DRIVER NAME";D$ú’0…"ENTER QTS";QTS“:…"ENTER VAS";VAS"“D…"ENTER FS";FS:“NVBðôQTSö®7‚ôVASU“XFBð= WôQTSöófff€ôFSp“bFHð¸ôQTSöó333�ôFS}“lÍ:R$ð"N"˜“v‘ Þ)"B4-ALIGNMENT":‘µ“€‘"VB=";VB;"(BOX VOLUME)"擊‘"FB=";FB;" HZ (BOX FREQUENCY OF RESONANCE)"””‘"F3=";FH;" HZ (SYSTEM CUT-OFF FREQUENCY)"”žHð=”¨‘:…"CHANGE BOX SIZE (Y)";R$Q”²‹ R$ñï"Y" Ý äw”¼‘:…"ENTER NEW VB (BOX VOLUME)";VB�”ÆFBðFSô(VASõVB)ö ×#¥”ÐFHðFSôÿ‡(VASõVB)Ò”ÚHðôÿŠ(ff&‚ôQTSô(VASõVB)ö333)õÿŠ( )ô”äÍ:‘ Þ)"VENTED BOX DESIGN":‘•îB$ð"VENT":R$ð"N":L$ð"N"•ø‘ D$'•‘"VB=";VB;• ‘"FB=";FB;" HZ"O•‘"F3=";FH;" HZ"x• ‘"PEAK OR DIP IN RESPONCE =";H;" DB"˜•*‘:…"CHANGE BOX SIZE (Y)";R$«•4‹ R$ð"Y" Ý ¼Ë•>…"LINE PRINT OUTPUT (Y)";L$ß•H‹ L$ñï"Y" Ý „ÿ•Rž Þ)"VENTED BOX DESIGN":ž–Wž D$–\ž"VB=";VB*–fž"FB=";FB;" HZ">–pž"F3=";FH;" HZ"f–zž"PEAK OF DIP IN RESPONSE=";H;" DB"Ž–„…"VENTED BOX RESPONSE GRAPH (Y)";R$¡–Ž‹ R$ð"Y" Ý ü½–˜…"CUSTOM DESIGN (Y)";R$Ñ–¢‹ R$ñï"Y" Ý <ø–¬Í:‘ Þ)"CUSTOM VENTED BOX DESIGN" —¶B$ð"":R$ð"N"#—À‘:…"CHANGE VB (Y)";R$7—Ê‹ R$ñï"Y" Ý ÙN—Ô…"ENTER NEW VB";VBY—ÙR$ð"N"y—Þ…"CHANGE BOX TUNING (Y)";R$�—è‹ R$ñï"Y" Ý ü¤—ò…"ENTER NEW FB";FBÓ—üÍ:‘ Þ)"GRAPHICS CALCULATION IN PROGRESS"ç—Að(FBö)õ(FSö)ÿ—BðAõQTSò(FBõ(ôFS))"˜CðòAò(FBõ(ôFSôQTS))ò(VASõVB):˜$DðõQTSò(FBõ(ôFS))N˜.‚ Fð Ü È ß b˜8F9ðFõFS:F5ðF9öv˜BF4ðF9ö:F3ðF9ö‹˜LF6ð(F4óCôF5òA)ö ˜VF7ð(BôF9óDôF3)öʘ`M(F)ðô(ÿŠ(F4õ(F6òF7)ö€)õÿŠ( ))ИjƒÚ˜t� lð˜~‹ B$ð"VENT" Ý ä™ˆÍ:‘ Þ)"CUSTOM VENTED BOX DESIGN""™�R$ð"N"-™’‘:‘ D$;™œ‘"VB=";VBO™¦‘"FB=";FB;" HZ"_™°‘"QTS=";QTSs™º‘"FS=";FS;" HZ"ƒ™Ä‘"VAS=";VAS£™Î‘:…"CHANGE VB OR FB (Y)";R$¶™Ø‹ R$ð"Y" Ý ¬Ö™â…"LINE PRINT OUTPUT (Y)";L$ê™ì‹ L$ñï"Y" Ý <šöž Þ)"CUSTOM VENTED BOX DESIGN":ž:žšž D$*š ž"VB=";VB>šž"FB=";FB;" HZ"Mšž"QTS=;QTSaš(ž"FS=";FS;" HZ"qš2ž"VAS=";VAS™š<…"ANOTHER VENTED BOX DESIGN (Y)";R$¬šF‹ R$ð"Y" Ý ¶šP‰ (ØšZÍ:‘ Þ)"CLOSED BOX DESIGN":‘êšdL$ð"N":R$ð"N"›n…"DRIVER NAME";D$›x…"ENTER QTS";QS)›‚…"ENTER VAS";VAS<›Œ…"ENTER FS";FSO›–…"ENTER VB";VB\› AðVASõVBn›ªFCðFSôÿ‡(Aò)�›´QTCð(FCôQS)õFS³›¾F3ðFCôÿ‡(((õQTCöó)òÿ‡((õQTCöó)öò))õ)Ó›ÈÍ:‘ Þ)"CLOSED BOX DESIGN"Þ›ÍR$ð"N"é›Ò‘:‘ D$þ›Ü‘"F3= ";F3;" HZ"œæ‘"QTC= ";QTCœð‘"VB= ";VB>œú‘:…"CHANGE BOX SIZE (Y)";R$Rœ‹ R$ñï"Y" Ý "kœ‘:…"ENTER NEW VB";VBuœ‰  •œ"Í:‘ Þ)"CLOSED BOX DESIGN"§œ,R$ð"N":L$ð"N"²œ6‘:‘ D$œ@‘"QTS=";QS,ÓœJ‘"QTC=";QTC,äœT‘"VAS=";VAS,óœ^‘"VB=";VB,�h‘"FS=";FS;" HZ",�r‘"ALPHA=";A,.�|‘"FC=";FC;" HZ",C�†‘"F3=";F3;" HZ",e��‘:…"LINE PRINT OUTPUT (Y)";L$y�š‹ L$ñï"Y" Ý ô›�¤ž Þ)"CLOSED BOX DESIGN":ž:žª�®ž"QTS=";QSº�¸ž"QTC=";QTCÊ�ž"VAS=";VASÙ�Ìž"VB =";VBí�Öž"FS ="FS;" HZ"ý�àž"ALPHA=";Ažêž"FC =";FC;" HZ"'žïž"F3 =";F3;" HZ"Qžô‘:…"CLOSED BOX RESPONSE GRAPH (Y)";R$ežþ‹ R$ñï"Y" Ý I”žÍ:‘ Þ)"GRAPHICS CALCULATION IN PROGRESS"¨ž‚ Fð Ü È ß ÝžFHðFõFC:FQðFHö:MAGðFQõ(ÿ‡((FQó)öò(FHõQTC)ö))úž&M(F)ðô(ÿŠ(MAG)õÿŠ( ))Ÿ0ƒ Ÿ:� lŸD‰ "ŸIR$ð"N"GŸN…"ANOTHER CLOSED BOX DESIGN (Y)";R$ZŸX‹ R$ð"Y" Ý ZdŸb‰ (xŸlÿÕ :Í:Œ:R$ð"N"ŸŸv‘:‘:‘"0 DB":‘"5 DB":‘"PER":‘"DIV."¥Ÿ€‘ÆŸŠ‘ Þ)"20";Þ)"HZ";Þ)"200"ÖŸ”‚ Ið Ü ¥âŸžÓ(I,&)蟨ƒ÷Ÿ²‚ Ið Ü & ¼Ó(,I)  Æƒ Ð‚ Ið Ü ! ß ( ÚÓ(,I). äƒ< î‚ Ið Ü D ø‡ Jb Ó((ÿŠ(Jõ)ôXŠi†)ò,%)h  ƒ| ‚ Fð Ü È ß –  ‹ M(F)ñó Ý M(F)ðó¾ *Ó((ÿŠ(Fõ)ôXŠi†)ò,(&óM(F))ó)Ä 4ƒç >„ 30,40,50,60,70,80,90,100,200¡C„ 20,30,40,45,50,60,80,100,120,140,160,200/¡H…"LINE PRINT (Y)";R$J¡RÿÕ ,,:‹ R$ð"Y" Ý fP¡\Ž�¡fž Þ)"-40";Þ)"-30";Þ)"-20";Þ')"-10";Þ2)"0";Þ;)"+10"½¡pž Þ )"+";Þ)"+";Þ()"+";Þ2)"+";Þ<)"+"Ì¡z‚ Ið Ü  Ô¡„‡ F䡎ž F;Þ)"I";ù¡˜‹ M(F)ñó' Ý ¶ ¢¢ž Þ2òM(F))"*"¢¬‰ À¢¶ž""$¢ÀƒN¢ÊÿÕ ,,:…"PRESS ENTER TO CONTINUE";R$T¢ÔŽž F;Þ)"I";ù¡˜‹ M(F)ñó' Ý ¶ ¢¢ž Þ2òM(F))"*"¢¬‰ À¢¶ž""$¢ÀƒN¢ÊÿÕ