啱啱買咗Velodyne cht-12但Yamaha Amp自动息机
本帖最後由 zairen 於 2011-2-23 10:03 編輯电视机墙只有两个插头，啱啱買咗Velodyne cht-12就用拖板把Velodyne cht-12, 电视机和HTPC一起开。Yamaha RX-V667 就同Rotel RA-06 Audio Amp用另一个插头的拖板。也就是两个插头五件耶同时开，但中间我不断按yamaha的movie钮调音效时它突然自动息机，再开也不动。要等一下五分钟重开才恢复正常。我有用yamaha的pre-out把audio amp连在一起。小弟问题如下：
1）十仔是不是一定要直接插墙壁不能用拖板？
2）Audio amp 和 AV amp 吃不吃电？如何加大插头火数？
3）现在改为十仔直接插墙壁不用拖板，但剩下的器材包括电视机，两个amp，htpc，CDP, DVD等都用同一个插头的拖板，会有问题吗？
谢谢。 本帖最後由 zairen 於 2011-2-23 17:49 編輯
i think i already know the answer. use this formula P=IV,
one circuit usually provides 15amp (air-con circuit provides 20amp)
Power = 15amp x 240v = 3600w (total watt per circuit)
one circuit may support few wall outlets or light points, normally is 3 or 4 outlets
if i use one wall socket (which is sharing the circuit with another 2 or 3 wall sockets/light points ) for my yamaha (500w, max), rotel amplifier (300w, max), htpc (about 250w), Cd player (20w) and LCD TV (250w), the total 'max' power drawn from that wall socket is only 1320w. (note: all the watts are max from the manuals respectively, except the htpc)
from the above formula, one circuit can support up to 3600w (say the efficiency is only 80%, i.e. 2880w), even if this circuit is shared by 3 wall sockets/light points, the wall socket is still ok if the other wall sockets are not used up (e.g. you don't use a hair dryer on another socket which is using the same circuit at the same time). becos, 2880w > 1320w.
but if the woofer which plugged to another wall socket is also sharing the same circuit with the one i use for my yamaha etc, i have to add another 450w. i.e. total is 1320w + 450w = 1720w, but it is still lower than 2880w!
anyway, i am not sure whether my fridge and other lightings are sharing the same circuit. otherwise i would just switch them off when i watch my movies.
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