review33.com:影音天地:有冇師兄知有冇變壓器由220v/50hz轉120v/60hz,

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[#21] 有冇師兄知有冇變壓器由220v/50hz轉120v/60hz, 謝謝各師兄, thx!		hkf112233 正式會員 61.xxx.xxx.70	2008-09-23 22:06

[#22] 有冇師兄知有冇變壓器由220v/50hz轉120v/60hz,
"Theorectically this should be DC of better quality and therefore less demanding in respect to reservoir capacitors (as PS Audio claims)."

Yes, I think so the power should be more stable due to the above reason. Power is too important for HiFi system.

et2

正式會員
124.xxx.xxx.35

2008-09-23 22:49

[#23] 有冇師兄知有冇變壓器由220v/50hz轉120v/60hz,
I think it should be 400Hz instead of 120Hz. 400Hz is US mil. spec. for some of their voltage supply. That's why if you buy a 變器, a lot of times they have 400Hz AC output.
Some of the late hifi equipment such as the later ML32 preamp do re-generate their power to 400Hz first before they rectify to DC. I have not follow on why it is better (perhaps Mark Levinson website have some technical paper to explain) but perhaps better for cap. charging and diode switching?? And you will have more pure DC without some switching higher freq. harmonics...dunno..

yukclee

正式會員
218.xxx.xxx.42

2008-09-24 12:28

[#24] 有冇師兄知有冇變壓器由220v/50hz轉120v/60hz,
In using the UPS to change the power supply to 60Hz is nothing wrong. But then most of the UPS do not put much attention on choice of components, material, layout, shielding, etc. to make it a hifi equipment. Hifi equipment has gone a long long way to iron all these things to make them of very high quality for us to enjoy. Just putting a normal class UPS will just downgrade the whole chain.
A hifi class UPS should have a full copper chassis and internal shielding. Audio grade caps, soft recovery diodes, OCC copper bars and wires, etc...!

yukclee

正式會員
218.xxx.xxx.42

2008-09-24 12:38

[#25] 有冇師兄知有冇變壓器由220v/50hz轉120v/60hz,
#11

Will it adversely affect sound quality?

aheung

會員
219.xxx.xxx.6

2018-08-31 12:31

[#26] 有冇師兄知有冇變壓器由220v/50hz轉120v/60hz,
60 hz 唔雖要理會
--------------------------
Now I use CSE transformer (200V =＞ 100V) and E-100 for my Marantz Project D1, the E-100 can provide electronic power at either 50Hz or 60Hz.

Using 50Hz or 60Hz causes no problem to equipment, but makes difference to my ears.

Happy listening !

最後修改時間: 2018-08-31 13:40:07

waterman

正式會員
61.xxx.xxx.139

2018-08-31 13:38

[#27] 有冇師兄知有冇變壓器由220v/50hz轉120v/60hz,
ups are powerline polluters unless it is equipped with high quality harmonic filters. You may say who cares about my neighbour's hifi as long as my hifi system sound good.

hotiron

會員
49.xxx.xxx.74

2018-08-31 13:56

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