【 Weak current College 】 various speaker cabinet features

We see various types of boxes, big and small, have openings, slotted, behind open, there are a variety of uncommon name, how they look like, what are the characteristics?

1, the most classical closed box,
It is the concept of infinite panels evolve and change an unlimited palette of the loudspeaker Cone back energy wasting disease so that the speaker can be relatively small volume of work, but it still is inefficient. The advantages of this box is small size, very small, low-frequency bass rolloff slow, low distortion! usually class box equipped with soft cone speakers (Basic equals high Q). Do such point is note box sealing!

2, bass reflex (domestic used called phase)
This is most commonly seen in the box, the benefit is modest, of medium size, in wide-band with good sound quality. Disadvantages are low turbidity, roll down too fast! (does not apply to low-frequency of hifi replay) phase-II is an enhanced bass reflex effect, low frequency enhancement increases, but also the resulting low frequency peaks before a deep valley, and the effect of low-frequency distortion turbidity is also growing difficulty making adjustments!.

3, open back style (referred to as OB-openbackoropenbaffle)
Most of the electric guitar with this box. It requires more hard wearing some cone speakers. Benefits-easy system, disadvantage is the low frequency of money. Be careful not to put such side panel engage in too deep, resonant voice.

4, transmission lines or labyrinth (TransmissionLineandAcousticLabyrinth)
The class box often have huge volume and speaker behind Sonic were put into a few metres of pipe feedback. Pipes are often collapsed, with a wide range of sound-absorbing materials to absorb all except the low frequency sounds to reduce distortion. Low frequency from the pipe opening up front with the trumpet sound phase. Characterized by low frequency strengthened at the same time, the quality is quite good.

5 back-folding Horn box load (RearLoadedFoldedHorn)

4, transmission lines or labyrinth (TransmissionLineandAcousticLabyrinth)
The class box often have huge volume and speaker behind Sonic were put into a few metres of pipe feedback. Pipes are often collapsed, with a wide range of sound-absorbing materials to absorb all except the low frequency sounds to reduce distortion. Low frequency from the pipe opening up front with the trumpet sound phase. Characterized by low frequency strengthened at the same time, the quality is quite good.

5 back-folding Horn box load (RearLoadedFoldedHorn)
In the Horn case, sound through an ever-expanding cross-sectional area of the cavity, the energy was enlarged and strengthened links to. Horn production difficult units and horns of seams, to prevent echo Echo distortion. Bass is the problem, a huge volume of low-frequency Horn, right angle folding Horn advantage is quite compact. The disadvantage is the high-frequency suppression and cause its distortion. The use thereof in the still positive sound the Horn output directly, although the efficiency than the down phase box to high, or minimum efficiency of low-frequency Horn box!

6, front load type straight Horn case, FrontLoadedStraightHorn
Such boxes with very high efficiency and directional!, and other big events are common in the stadium. But do not fit a lower frequency, because the will to a large volume and length. Benefits in addition to the preceding two points, and bass sounds small, transient, resolving power high benefits. Hifi, often used in high frequency, requested with compressiondriver.

7, front load folded Horn box FrontLoadedFoldedHorn
Classic W-Bin Horn case is such that advantage is high efficiency and compact! disadvantage is that bandwidth is narrow, bass. Although efficient but some think that the quality or even better than the bass down phase.

8 BandPass, bandpass enclosure
Recent years popular box design, general common 4-and 6-order design. This kind of sound quality is very bad, not normally used for hifi use! but due to enhance the low frequency and with low-pass filter effect, so it is very suitable for the AV subwoofer design.