Altec-lansing 418-8H Bedienungsanleitung PDF herunterladen (Seite 3)

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FREQUENCY IN HZ

Figure 1. 418-8H Frequency Response Measured at 4' on Axis with 1 Watt Input

ARCHITECT'S AND ENGINEER'S SPECIFICATIONS

The musical instrument loudspeaker shall have a maximum diameter of 15-5/16"

and shall weigh 14 pounds, 6 ounces. It shall have a structurally reinforced die-cast

aluminum frame which shall be rigid enough to permit front or rear mounting. The

voice coil shall be 3" in diameter, of edge-wound copper ribbon, and shall operate

in a magnetic gap having a flux density of 13,000 gauss. The loudspeaker shall have

an Alnico V permanent magnet weighing not less than 2.4 pounds. The magnetic

structure shall have a metal dust cover to protect it from dirt, iron particles and

magnetic dust. The cone-surround area shall be of high-compliance cloth. The

musical instrument loudspeaker shall meet the following performance criteria. Power

rating, up to 150 watts of continuous program material. Frequency response, uni

form from 45 to 8000 Hz. Pressure sensitivity; 99 dB SPL with 1 watt input of

band-limited pink noise from 100 Hz to 10 kHz measured on axis 4' from cone, 98

dB SPL with 1 watt input of band-limited pink noise from 100 to 1000 Hz measured

on axis 4' from cone (Ref.: 0.0002 dyne/cm^). Equivalent El A rating, 52 dB SPL

measured on axis 30' from cone with 1 milliwatt input. Nominal impedance, 8

ohms. Nominal free-air cone resonance, 55 Hz.

The musical instrument loudspeaker shall be the ALTEC Model 418-8H.

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Altec-lansing 418-8H Bedienungsanleitung Seite 3