Veteran foreign speakers today, to talk about buying second-hand experience of 2

whether there is (1) does the box body damage and the crack: The external decoration barks whether the even symmetry, whether there is the sand buckle does fall off; speaker  body connecting point whether there is obvious rubber mark, if has, then explained that this sound box has patched. (2) box body weight quantity and outward appearance geometry size whether to grasp with you consistency. (3) box back data plate whether to label the standard, the model and actually whether consistent, whether there does spelling mistake's English word, verify the habitat, on data plate's related information should understand completely consistently with you. (4) binding clamp whether to have the obvious rusty stain. Buys the identification on the author the sound box, although has five year about use history, but the binding clamp does not have the rusty stain, the orthodox school original installation speaker  post fabrication technology guarantees generally cannot easily by the oxide etch.what (5) is most essential is the loudspeakerunit distinction. Looking from front, on sound box's unit and advertisement coloring book unit outward appearance completely to be whether consistent; The unit is whether complete, whether there is the degum, does the sound trough whether there is crack, hold back the sound trough with the hand, the voice coil and the magnet whether there is card anti- or the friction, but this point in audition time, as soon as opens the sound apparent. (6) on should box body's all fastening screws the look round, whether there is the metal screw driver twist has moved the scar. Should better be able to convince the shop owner, lets you hit opens a box the back connecting box, inspects the internal detail carefully. You should be careful that twists down the connecting box, pries open gently takes out, looked whether there is the frequency divider has repaired the trace, whether there is the part does replace (mainly has looked at on frequency division board whether there is special anomalous new spot), about on frequency divider part to be whether consistent, whether above does have the special English mark (model, manufacture); Looked that internal unit lead wire, whether solid compact, on-line should have, negative area other symbol; The internal installation sound absorption cotton and kapok is whether pure, the sufficiency; To the optical fiber good place, opens out the sound absorption cotton and kapok to look that at the back of unit labelling model to be whether consistent with the material. 3? Earnest audition. The decide finally buys the sound box, receives goods by the ear. This step difficulty is big, especially regarding fever at the beginning of friend, in such faces the street in the shop front the audition, the disturbance are many, but in that kind of shop will not look like in the specialized acoustic shop to have the special listening room, therefore, will need an expert friend's reference to complete.

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