【 Weak current College 】 how to select the low-frequency speaker in.. ---Power By 【 China power house network 】

First: the choice of low-frequency speaker:
A speaker Shelf has two kinds: 1 is: plate punch made of 2 is: HI--FI and gold round cast shelf, advantages: good rigidity,
B: voice coil choices: 1. wire-wound, 2: oxygen-free copper wire wound, 3: flat enamelled wire wound, 4: drill magnesium alloy construction, 5: KAPTON of polymer material, the material used for the aviation industry can withstand the high temperature of 350 degrees centigrade,
C: speakers lead selection, 1: stranded copper braided cord, 2: quality silver coated copper wire
D; The select 錐: bevel-is the main vocal component speakers, its materials as: geometric shape and processing production process on the low frequency range of frequency response and sound effects, also decided that the distortion of the low-frequency speaker cell size, 1: from widening the playback frequency range of hair, bevel-effective high-elastic material, 2: low-frequency speaker distortion reduction from the point of view, bevel-materials with good steel, 3: from the lower bevel-split vibration q value perspective. bevel-material has a large internal loss, bevel-material is divided into 1: natural low pulp salvage, 2: paper cones, 3: polymer composites, such as,: graphite reinforced polypropylene braided carbon fiber-4: wool, paper trays,
E,: speaker resonance frequency and quality factors, 1: lower resonance frequency, low frequency emphasis put sound limit can do much more low-frequency response, it is often the better, because the speaker resonance frequency and speaker vibration system of equivalent quality and resistance is proportional.
How to choose

Both hands and gently press the speaker cones, pressing the more feel soft and shows when the speakers fold ring and centering force more soft, it slices the resonant frequency is low, in short, the low-frequency speaker of the lower resonance frequency, the better, 2: speaker quality factor: usually choose quality factor: 0.4---0.5.