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电吉他弦高(Action)的调整详解

来源:$article_from_name$ 2019/3/26 21:56:41      点击:

先说一下我推荐的弦高

14品处

6弦2.2mm±0.3mm

1弦2.2mm±0.3mm

各距离均为琴弦下沿到品丝顶端的距离


对于弦高的调整,大体上是由于

1,出现打品

2,手感调整

3,更换不同规格的琴弦

4,音色调整


我们先逐条的来看看在什么程度下需要调整

1,由于大多数电吉他的弦高都被调整得比较低,所以要确保所有的位置都不打品是比较困难的。就算是非常高档的吉他,由于品丝安装和琴颈表面平整度以及Saddle(琴桥上的琴弦支撑)和NUT(琴头这边的琴枕)的琴颈拟和度都不可能做得非常精确。所以没有必要追求100%的不打品。事实上,也是不太现实的。

2,对于快速型选手,可能会比较追求较低的弦高,这样对提高跨弦速度是很有益处的。

3,当更换不同的规格的琴弦时,由于总体张力不同,琴颈曲度会发生变化。这个时候原先的调整将不再有效,需要全面重新调整。

4,大家知道标准的古典吉他的弦高是多少吗?在12品处,低音E是4-4.5mm,高音E是3.5-4mm。这样做完全就是为了充分的让琴弦震动来得到更多的音量和共鸣。电吉他特殊的地方就是拾音器只能拾取琴弦的水平震动,所以相对可以降得比较低同时比较合适用PICK来演奏。但是对于琴弦过低影响整体的振动能量和共鸣这一条是相同的。所以琴弦降低要有一个限度。以得到满意的音色为准。


接下来,说一下调整里面涉及到的吉它上面的部分

a,琴枕

b,琴颈 -〉TrussRod(琴颈钢筋)调整

c,品丝 -〉专用品丝挫

d,Saddle(琴桥处琴弦支撑,琴马,琴鞍) -〉对于双摇就是琴桥调整


然后我们来做一下准备工作。

对于双摇琴:

I.确保正确的调音

II.确保琴桥与琴身表面平行

III.准备工具,包括钢尺,六角扳手,琴颈调节扳手

对于单摇琴

I.确保正确的调音

II.确保琴桥状态(小幅度双摇还是完全紧贴琴身?)

III.准备工具,包括钢尺,六角扳手,琴颈调节扳手

对于固定琴桥

I.确保正确的调音

II.准备工具,包括钢尺,六角扳手,琴颈调节扳手


然后我们就可以开始调整了,有摇把的吉它的特殊注意事项我会在括号里注明

首先,调整琴颈:(同步的调整Saddle(双摇琴就是琴桥))

我们要进行一下测量,一般来说,过于平直会导致低品位打品,过于弯曲则会导致高品位打品。对于电吉他的21-24F的琴颈来说,琴颈的整个弯曲可以看作是比较理想的圆弧形,为什么琴颈调整会导致琴颈上的弦高变化速度不同(图一)。测量的进行请按照如下步骤。由于琴颈和琴身的结合角度是被固定的,所在一个固定的品位(12F)保持固定的弦高的情况下看从这品(12F)到最高品位的弦高变化量就可以知道琴颈的弧度是否合适。一般来说,只要琴颈还是比较工整的情况下,从12F的弦高到最末品的高度差在2-3mm之内比较合适,具体的调整例子:12品6弦高2mm,24品6弦高2.3mm。所以,每调整一下琴颈都需要校正一次琴弦高度。完整这个调整以后,至少12F以上应该很少再会打品。然后我们看看各弦第一品是否打品。如果出现打品则说明调整的过直。稍微松开一点TrussRod,不过这样会对高品位产生一定影响,无论如何,请保证从12F的弦高到最末品的高度差不要小于2mm。如果没有打品的话那么琴颈的调整就结束了。

上面说过每一次调整TrussRod都需要重新调整Saddle来调整弦高,对于各种不一样的吉它请参照各自的用户手册。这里说一下几种典型的琴桥的Saddle的调整方法。

Stratocastor
使用Saddle对应的小六角扳手来调整高度从而改变弦高。由于会改变Tension(张力),所以调整完毕以后要调音
FloydRose以及Ibanez EDGE
一般说起来原厂的FloydRose或者是其他的授权COPY基本上调节琴桥两侧的调节螺丝都是可以直接通过工具来旋转来调整琴弦高度。这种琴桥的Saddle本身不具备个别琴弦高度的调整能力。Ibanez 的EDGE比较特殊。在两侧的悬挂桩螺丝的内部有一个锁紧的小螺丝,类似膨胀螺丝的结构。所以步骤稍微复杂,需要首先用最小的六角扳手松开里面的锁定螺栓才可能调整琴桥的支撑螺丝。这点需要注意
Magic-O-Tune
这种琴桥类似于上面的FloydRose琴桥。只是有一点需要注意的是由于每一次调整都会改变Tension所以要注意每次调节完毕以后调音。
在完成了琴颈调整和初步弦高调整以后,如果你的琴已经达到了你的要求状态,那么大体上调整已经可以宣告结束了。但是对于比较旧的吉它,以及本身状况不是特别好的吉它,可能需要进一步进行如下调整:琴枕的高度和品丝的打磨

琴枕的高度会影响空弦的弦高以及低品位的打品情况。但是不能升的过高。不然严重影响低品位的弹奏手感。一般说起来,以空弦第一品不打品为基准,大致在0.1mm到0.2mm左右。

然后就是品丝了。这一条的调整需要慎重。因为品丝打磨过了是不能调整回来的,必须要重新换品才能解决。一般来说也只有在上述努力无论如何都没有办法解决的情况下才能考虑的。打磨的时候需要符合指板弧度的品丝锉。在打磨到不打品以后,还需要重新修正品丝弧度。

来源于:吉他中国

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