本人剛剛打算買膽機,比了小小訂,打算昨天去比尾數,拿機走之際,我行埋去犘下部機發現部機電源牛起震,我問店員,佢話係正常,佢重話你聽下都唔會對聲音有任何問題,比你地會唔會接受呢個解釋?

最大問題部機係十幾萬(牌子無謂講,免影響人地聲譽)

重有又唔係大陸土炮機有咁既情況我先感到出奇

Jadis?? 你唔講brand name, 現任用家難比意見呢

識我既人一定知係邊個牌子,我一向都係玩開佢牌子的機,發現的咁既問題我都難以置信,我都有佢牌子幾部後級一直都無問題,佢要我用緊個的係底班個我想買個部....

我想問既係一部膽機一開動電源牛就一直震動,(震動係聽唔到震聲的,但你用手犘佢係一直震緊,震到連你犘部機身你感覺到有震動),有咁既問題係唔係都合理先係膽機身上

電源牛起震 = low quality 電源牛.

1st. A lot of magnetic field is formed between individual EI sheets. So it repulse each other. I believe the EI sheets are too thick, and the metal quality is just so so...........

2nd. The EI metal sheets is not tight enough. If they are clamped very tight, it cannot vibrate.

3rd. The insulation (mechanical) is not good enough so you can feel the viration.

我用幾仟元古董機及幾萬元既土炮機都唔會起震.

如果價錢同起震成正比, 賣幾拾萬既膽機可能會跳舞?

168wa

＞電源牛起震,我問店員,佢話係正常,佢重話你聽下都唔會對聲音有任何問題,比你地會唔會接受呢個解釋?
+++++++++++++++++++++++++++++++++++++++++++++

佢話係正常 ma.

Then just show the photo of the amp and shop law.

Let us SEE what is "正常" amp.

唉,比我一種感覺係的牌子一出佐名就咁,好失望

我而家為佐件事訓都訓唔到,我同佐個店員講假啦,我叫佢打去原廠問佢係唔係呢部野機件有問題,qc得唔好,我話十幾萬機有呢個問題我真係接受唔到,我同佢講如果你開到部出來無震既,我會好樂意比錢買

In simple, it is just a cheap cheap power transformer.

The core is too small, handling too large current, and the construction is just so so..........

I do believe a lot of cheap cheap PRC Amp transformer will never 起震............

168wa hing,

Would you share the model and the shop name?

I try to help you to know the reason of the problem.

Would you help R33 to prevent fall into black shop/black brand name again?

The vibration can be further reduced if the transformer is filled with oil/bitumen.

Obviously it will increase the cost, but it can reduce the transformer performance (improve heat dissipation and reduce vibration).

如起震到機身也震就真不可接受了，你沒買吧？

很明白你對這牌子失望的心情，如是我，如店員態度稍為不好，

分分鐘換曬所有器材...

我也有隻英國環牛變壓器，也有輕微dede聲，但摸它沒震，
我也不知算不算是震...

我一定接受唔到！有人話對聲冇影晌,部機好好聲噃！但想想如果唔震咪仲好聲！牛震絕對是有問題,否則發燒友用盡方法都是想被震,减少捍擾咪白費！

assuming there are no contruction problems or dc on the mains, all transformers have this problem. it is called magnetostriction and is a matter of degree. but if it vibrates to such a degree, you might want to take a look at another amp.

Yes, all transformer will vibrate.

But most of the transformer, you will never notice the vibration.

Even it is a cheap cheap PRC amp, it is not acceptable!!!!

d人用咁多錢買釘買架為左什麼,都係為了備震,
幾千的大陸機就要預左姐......
我都用緊胆前後,都係d中價貨,但一定無d咁既事!!!

隻電源火牛唔係香港交流頻率的, 震唔出奇