! FH -- 1M -- 3/60 MULTICELLULAR HORN PERFORMANCE CHART Horn Model (a) Number of Drivers (b) Type Driver and Output** Distribution Pattern (d) Cut-OF Frequency (e) Cell Configuration Horn Dimensions L W H Throat Code Number 1 Unit2 Units4 Units Horn Weight in Pounds 803 1 804 2 805 288B -- 111 db 290C -- 107 db 7304 -- 105 db 35§ x 70§ 300 cps 288B -- 110 db 290C -- 106 db 730A -- 104 db 35§ x 70§ 400 cps 288I3 -- 109 db 290C- 105 db 7304 -- 103 db 40§ x 80§ 500 cps 1003 l or 2 288B -- 109 db 290C -- 105 db 730A -- 103 db 35§ x 90§ 300 cps 1004 4 288B -- 109 db 290C -- 105 db 730A -- 103 db 40§ x 100§ 400 cps 1005 1 or 2 2888 -- 108 db 290C -- 104 db 730A -- 102 db 40§ x 100§ 500 cps 1504 4 288B -- 108 db 290C -- 104 db 730A -- 102 db 60§ x 105§ 400 cps 1505 1 or 2 288B -- 106 db 290C -- 102 db 730A -- 100 db 60§ x 105§ 500 cps 1803 1 or 2 2888 -- 106 db 290C -- 102 db 730A -- 100 db 53§ x 105§ 300 cps 1804 4 288B -- 106 db 290C -- 102 db 730A -- 100 db 60§ x 125§ 400 cps 2x4 26/y x 33 x 17/A 30162* 2x4 23/j x 32 x 17/y 30172* 2x4 17/y x 24/y x 14 /y 30162* 2 x 5 25~/y x 38 x 17~/y 30210* 30170' 2 x 5 21 x 38~/y x 17~/y 2x5 17/y x 30 x 14/y 30210* 30170' 3x5 3x5 3x6 3x6 21 x 38% x25 16% x 30~/j x 20 27i/y x 44 x 25 30166* 30172* 30166* 30172 99 73 47 'I 20 (2)30170* 5IO 55 (2)30170' 165 90 250 23/y x 44 x 25 (2)30170* 241 'One 30474 Adapter required in addition for each 7304 Driver. * SPL, db/.0002 dyne/em', at 4 feet for input of 1 watt, 500 to 2,500 cps warble. ARCHITECTS AND ENGINEERS SPECIFICATIONS The high frequency horn shall be of the multicellular type, equipped with proper throat and (b) compression driver. As specified elsewhere, it shall produce a uniform sound pressure field of (c) db at a distance of 4 feet and over a field of distribution of (d) with 1 watt input of 500 to 2,500 cps waarae. The low frequency cutoR shall be (e). The horn shall be constructed of individual weatherproofed metal cells with a special tar or damp- ing mate'rria retween the cells. The cells shall all be straight with an exponential expansion. Folded or re-entrant horns will not be acceptable. The horn shall be equipped with mounting brackets both on the front and on the appropriate cast throat. Multicellular horn shall be Altec Lansing Model (a). (NOTE: Fill in proper values and numbers from Horn Performance Chart.) PRINTED 1N U.S.A. A L -- 1434-1