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TITLE: 3 c o e » i c reet; E N C L O S U R E F o i e

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TITLE: s c u b i c F e e T 7 e u c L o s o t e j s f g ^

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SHEET I OF UNLESS OTHERWISE SPECIFIED DIMENSIONS ARE IN INCHES AND MILLIMETERS.

J B L Enclosure Porting Chart H o m e E n t e r t a i n m e n t L o u d s p e a k e r s

o; PfllSC (see nae 6)

or PfllSC (600 note 6)

Noles 1. This chart contains porting recom

mendations tor J B L lull range, extended rangeandtowlrequency loudspeakers in a variety of enclosure volumes. Each represents the optimum tor the mean of the volume range indicated, i.e.. the dimensions given tor an enclosure volume of 85 titers (3.1-4.0 cubic feet) actually would be optimum for an enclosure volume of 99 liters (3.5 cubic feet). The port dimensions for the enclosure drawings in the J B L Enclosure Construction Kit have been optimized for those specific enclosure volumes and configurations and. therefore, may not agree with the information in this chart.

2. Enclosure volume can be calculated by multiplying internal length x width x depth If the measurements are taken in inches, divide by 1728 (the number of cubic inches in a cubic foot) to obtain internal volume in cubic feet.

3. Duct length is measured, from the baffle surface to the end of the duct, and thus includes the thickness of the baffle panel.

4. Port area may be converted to d'ameter using the formula A = tt ra

The diameters given in the table below are inside dimensions. The baffle panel should be cut to accommodate the outside diameter of the lube used.

Port Area Diameter

Square Inches Inches Millimetres 3 2 50 7 3 80

10 1 3% 90 13 4 100 26 6 * 150 40 7% 180 50 8 200 80 10 260 95 11 280

115 12 310

5. Multiple pods may be used, but the total area (not diameter) must equal the area specified. Divide the area by the number of pons to be used, then calculate diameter. Even though multiple ports are used, duct length for each should be as specified in the chart.

6. Refer to the literature enclosed with passive radiators for tuning instructions.

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UBL JAMES B. LANSING, INC. Northridge, California 91329

TITLE BAPrUe PAMELA FOR B AMD 5 CUttC FEET E N C L O S U R E S USIAJG J 0 U Md^ldAL IM*>TRUM£MT AMD PROFESSIONAL S £ J? (6S BA^S CCrVERS.

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UBL J A M E S B . L A N S I N G S O U N D . I N C L o s A n g e l e s . Ca l i fo rn ia 9 0 0 3 9

T I T L E :

5*75" c u e » i c F E E T ; £ U C L O S O R . H F O ^ M U S I C A L l U S T f t U N ^ E w f L O U D S P o A K & R . 5 / 5 f £ M S

S H E E T I O F I

U N L E S S O T H E R W I S E S P E C I F I E D D I M E N S I O N S A R E IN I N C H E S A N D M I L L I M E T E R S

http://fcOA.fi

J B L Enclosure Porting Chart M u s i c a l I n s t r u m e n t L o u d s p e a k e r s

W i r e C h a r t H o m e H i g h Fidelity L o u d s p e a k e r S y s t e m s

d i s t a n c e i m p e d a n c e

4 Q 16S?

0 - 1 5 m ( 0 - 5 0 f t ) 1 6 A W G 1 8 A W G 2 0 A W G

1 5 - 3 0 m ( 5 0 - 1 0 0 f t ) 1 4 A W G 1 6 A W G 1 8 A W G

3 0 - 6 0 m ( 1 0 0 - 2 0 0 tt) 1 2 A W G 1 4 A W G 1 6 A W G

M u s i c a l I n s t rument L o u d s p e a k e r S y s t e m s

d i s t a n c e i m p e d a n c e

4 f i 8 n 16S1

0 - 1 5 m ( 0 - 5 0 ft) 1 4 A W G 1 6 A W G 1 8 A W G

1 5 - 3 0 m ( 5 0 - 1 0 0 ft) 1 2 A W G 1 4 A W G 1 6 A W G

3 0 - 6 0 m ( 1 0 0 - 2 0 0 ft) 1 0 A W G 1 2 A W G 1 4 A W G

J B L Port Tuning Work Sheet

Recommended Tuning Frequency For JBL Loudspeakers

Model Description Enclosure

Tuning Frequency

124A 136A

300-mm (12 in] low frequency 380-mm (15 in) low frequency 26 Hz

1 F8T LE10A LE12C LE14A LE I4C LFI5A

200 mm (9 in) full range 250-mm ( 1 0 in] low frequency 300-mm ( t2 in) composite 360-mm (14 in) low Irequency 360-mm (14 in) cornposiie 3fi0 mm ( 1 5 in) low Irequency

32 Hz

D123 D131 D130

130 A. 130L1

300 mm ( 1 2 in) exiencled range 300-mm (12 in; exiencled range 380-mm ( 1 5 in) extended range 380-mm (15 in) low Irequency

45 Hz

D208 ?00 mm (8 in; oxlonried range 55 Hz

ll system luring 15 nigrer than 'Konvrended Icr the Cudsccakor cover a portion 0' tne con or lengthen me duel 11 one is sed Conversely, ll system tun ng is 'ovier lhan recommended made the Den large' or shorten tne di-ct When Ituniro e pass*ve radiator begin /,ith le.ver tuning wffghts than recommended for the enclosj'e vo'urne Aoa Wfegllts 0 system tunny IS Huher than tccommenc&a. rcmnve weighis f trie system tuning .5 lo/.or -nan ne&red A par-ri.e raflarr.' .-an he Mmpnranly mounted inside Out SO tro tuning AeiQhis are easily ai-Ltss-blc. AdGi[io;'4il WUSIIGIS ucod in comunclion v;ill 1 lite wights supplied it** aid in ittxaitiir.g precise tuivng

Recommended Tuning Frequency For JBL Loudspeakers

Model Descripiton Enclosure

Tuning Irequency

124H 136H

300 mm (12 in) low Irequency 380 mm (15 in) low Irequency 26 Hz

LE8T-H LEI0H LEI4H LE15H

200 mm [8 in) full range 250 mm (10 in) low frequency 360 mm (14 in) low frequency 380 mm (15 in) low frequency

32 Hz

DI30H 13011

380 mm {15 in) extended range 380 mm (15 in) low frequency

45 Hz

D208H 200 mm (8 in) extended range 55 Hz

1' sys»m luring '5 htg»ef man recommended lor iho lOjOspaaVer cover a ponon o? :ne port or lengthen the duel il one is ccO Coflve'seiy. il system tumny tB tower than recomrnended make Hie pun larger or shorten the duel When luning a pas>va radiaiot IXg.n wflh feêr lumrG. v/C;giil!> lhan recommflndedfoi" the enclosure volume Add .veirjhts it Sv-aorn lurwig ts higpgr man rocomrifc-nded remnve -.sophls il l»ie ayaleni tjmng * lo*er man desirea A pass.ve radtaior can bo temporarily moipred 'nside oui so me iiir ng /.eighth arc oasiiy accession Additiona;-wasne's usco in conjunction vnth me v/eghis supplied win and In cttaming orec-se lumng

1975 JBL Transducer / Enclosure Porting Information enclosure volume (ft 3)

0.75 to 1.0 1.1 to 1.5 1.8 to 2.0 2.1 to 3.0 3.1 to 4.0 4.1 to 5.0 5.1 to 8.0 8.1 to 7.0 7.1 to 8.0 8.1 to 9.0 9.1 to 10.0 10.1 to 11.0 11.1 to 12.0

L E 8 T 8" full range port a rea Qn2) PR8 PR8 7 13 13 duct length (in) 4.5 5.5 3.0 Fb (Hz) 42 40 38 44 41 37 43 41 38

D208 8" extended range port a rea Qn2) 13 26 26 duct length (in) 3.5 5.0 2.0 Fb (Hz) 58 55 52 60 55 50 60 57 53

L E 1 0 A 10" low frequency port a rea Qn2) PRtO 7 13 13 duct length (in) 4.5 5.5 3.0 Fb (Hz) 42 40 38 44 41 37 43 41 38

L E 1 2 C 12" full range port a rea Qn2) 3 7 10 13 13 duct length (in) 4.0 8.0 5.0 5.0 3.5 Fb (Hz) 31 20 27 33 31 28 34 32 30 33 32 30 33 32 30

D123 12" extended range port a rea Qn2) 13 26 26 duct length (in) 2.0 2.5 0.75

Fb (Hz) 58 53 48 58 55 51 59 56. 53

124A 12" low frequency port a rea Qn2) 7 13 13 duct length (in) 5.0 6.0 4.0

Fb (Hz) 35 33 30 36 34 31 35 34 32

D131 12" extended range port a rea Qn2) 13 40 50 50 80 80 95 115 D130 15" extended range duct length (in) 0.75 3.0 3.0 2.0 4.0 3.0 3.0 3.0 130A 15" low frequency Fb (Hz) 48 46 43 51 43 47 50 43 47 49 48 46 48 47 46 48 47 46 48 47 46 49 48 47

L E 1 4 C

L E 1 4 A 14" full range

14" low frequency port a rea Qn2) 13 13 13 13 26 L E 1 4 C

L E 1 4 A 14" full range

14" low frequency duct length (in) 7.5 5.5 3.0 2.5 5.0

Fb (Hz) 46 44 41 44 41 37 43 41 38 39 38 36 39 38 36

L E 1 5 A 15" low frequency port a rea Qn2) 26 26 26 40 40 40 40 40

duct length (in) 7.0 5.0 3.0 5.0 4.0 3.0 2.0 0.75

Fb (Hz) 39 37 35 39 38 36 40 33 37 39 38 36 38 37 36 38 37 36 38 38 37 40 40 39

136 A 15" low frequency port a rea Qn2) 13 26 26 26 duct length (in) 4.5 8.0 8.0 5.0

Fb (Hz) 34 33 31 34 33 31 34 33 31 33 32 31

1 9 7 7 J B L T r a n s d u c e r / E n c l o s u r e P o r t i n g I n f o r m a t i o n

enclosure volume (ft 3)

0 7 5 to 1.0 1.1 to 1.5 1.8 to 2.0 2.1 to 3.0 3.1 to 4.0 4.1 to 5.0 5.1 to 8.0 8.1 to 7.0 7.1 to 8.0 8.1 to 9.0 9.1 to 10.0 10.1 to 11.0 11.1 to 12.0

L E 8 T 8" full range port a rea (in^) scaled 3 7 13 13 duct length (in) 3 4.5 5.5 3.0 Fb (Hz) 41 38 35 42 48 38 44 41 37 43 41 38

D?08 8" extended range port a rea (in^) 13 26 26

duct length (in) 3.5 6.0 2.0 Fb (Hz) 58 55 52 57 53 48 68 57 53

L E 1 0 A 10" low frequency port a rea (in^) scaled 7 7 13 duct length (in) 8.0 5.0 8.5

Fb (Hz) 34 32 30 35 33 30 35 33 30

L E 1 2 C 12" full range port a rea (in^)

duct length (in)

Fb (Hz)

D123 12" extended range port a rea (in^) 13 26 26

duct length (in) 2.0 2.5 0.75 Fb (Hz) 58 53 48 58 55 51 59 56 53

124A 12" low frequency port a rea (in^) 7 7

duct length (in) 8.0 5.0 Fb (Hz) 34 32 30 35 33 30

D131 12" extended range port a rea (in^) 13 40 50 50 80 80 95 115 D130 15" extended range duct length (in) 0.75 3.0 3.0 2.0 4.0 3.0 3.0 3.0 130 A 15" low frequency Fb (Hz) 48 46 43 51 49 47 50 49 47 49 48 46 48 47 46 48 47 46 48 47 46 49 48 47

L E 1 4 C 14" full range port a rea (in^) 7 7 13 13

L E 1 4 A 14" low frequency duct length (in) 8.0 5.0 8.5 4.5

Fb (Hz) 34 32 30 35 33 30 35 33 30 34 33 31

L E 1 5 A 15" low frequency port a rea (in^) 26 26 26 40

duct length (in) 7.0 5.0 3.0 5.0 Fb (Hz) 39 37 35 39 38 36 40 39 37 39 38 36

136 A 15" low frequency port a rea (in^) 13 13 26

duct length (in) 8.5 4.5 8.0

Fb (Hz) 30 29 27 29 28 31 38 29

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(737 KM X* #51 MM * 194 MM) - Cieri