Оценок - 2, средний балл: 3.5
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Фрагмент инструкции
The voice coil gap shall have a flux density of at least 13,000 Gauss, produced by a magnet having a weight of 13 ounces. A machined phasing plug, which also serves as the pole piece, shall have two exponential acoustic slots and shall be utilized to provide the proper phase relationship between the sound emanating from the center and edges of the diaphragm and voice coil assembly, thus ensuring maximum high-frequency reproduction while maintaining a smooth overall response. The entire diaphragm and voice coil assembly shall be field replaceable without requiring special tools or skills; this shall be interpreted to mean that the loudspeaker shall incorporate self-centering dowels to ensure proper spacing and alignment of the diaphragm and voice coil assembly. The HF driver loudspeaker shall produce a sound pressure level of at least 109.5 dB with 1 watt input and 124.2 dB with 30 watts input at a distance of 4 feet from the mouth of a 30" trumpet when a warble band of 500 to 2500 Hz is used. Single frequency measurements shall not be acceptable under this specification. The frequency response of the HF driver shall be uniform over the range of (specify one): 500 to 20,000 Hz with the ALTEC 511A or 51 IB sectoral horn and N501-8A dividing network. 800 to 20,000 Hz with the ALTEC 811B sectoral horn and N801-8A dividing network. Any high-frequency driver loudspeaker not meeting all of the foregoing requirements shall not be acceptable under this specification. The high-frequency driver loudspeaker shall be ALTEC Lansing model 807-8A. (FOR ALTEC 808-8A) The high-frequency driver loudspeaker shall utilize a diaphragm coupled to a voice coil that shall be edge-wound of aluminum ribbon and that shall be 1-3/4" in diameter. The voice coil gap shall have a flux density of at least 15,250 Gauss, produced by a magnet having a weight of 1.2 pounds. A machined phasing plug, which also serves as the pole piece, shall have two exponential acoustic slots and shall be utilized to provide the proper phase relationship between the sound emanating from the center and edges of the diaphragm and voice coil assembly, thus ensuring maximum high-frequency reproduction while maintaining a smooth overall response. The entire diaphragm and voice coil assembly shall be field replaceable without requiring special tools or skills; this shall be interpreted to mean that the loudspeaker shall incorporate self-centering dowels to ensure proper spacing and alignment of the diaphragm and voice coil assembly. The HF driver loudspeaker shall produce a sound pressure level of at least 111.7 dB with 1 watt input and 126.4 dB with 30 watts input at a distance of 4 feet from the mouth of a 30" trumpet when a warble band of 500 to 2500 Hz is used. Single frequency measurements shall not be acceptable under this specification. The frequency response of the HF driver shall be uniform over the range of (specify one): 500 to 20,000 Hz with the ALTEC 511Aor511B sectoral horn and N501-8A dividing network. 800 to 20,000 Hz with the ALTEC 81 IB sectoral horn and N801-8A dividing network. Any high-frequency driver loudspeaker not meeting all of the foregoing requirements shall not be acceptable under this specification. The high-frequency driver loudspeaker shall be ALTEC Lansing model 806-8A. MS«* 8 S i •“ 3 « sis 33.2 S-Sj •fct» g Sc* 111 v.?ts e 15* tor\ © g5*-?! OiP Z a ■sS! g S'S «8 5 •* !»Jf ilf 1 S’S r* sla» »5 O'« *8*1 * LITHO IN U.S.A. CP-119-5K Specifications and components subject to change without notice. Overall performance will be maintained or improved. AL-1777...
Эта инструкция также подходит к моделям:Акустика - 807-8A (809.16 kb)