review33.com: 影音天地: 大功放推小喇叭....會點?

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[#1] 大功放推小喇叭....會點? 各ching比D意見?		joey19652008 正式會員 119.xxx.xxx.183	2010-08-04 21:48

[#2] 大功放推小喇叭....會點?
只在於你所謂的"大功放"和"小喇叭"的質素如何.最好講出具體的配搭才可給與意見.

最後修改時間: 2010-08-04 23:42:01

seven-eleven

正式會員
158.xxx.xxx.199

2010-08-04 23:40

[#3] 大功放推小喇叭....會點?
大功放=400W output
小喇叭= bookshelf speaker ~150W
換小功放有150W output就好無力.點解?

joey19652008

正式會員
119.xxx.xxx.183

2010-08-04 23:51

[#4] 大功放推小喇叭....會點?
150w output was measured at certain frequencies. it did not represent similar output at low frequencies.

i can easily use a 50w power amp to drive properly a pair of 200w speakers. if an amp has been designed with good topology, using good capacitors and resistors, and can provide ample current i cannot see there is any problem

a 200w speaker is simply telling u that it can handle 200w power. how sustainable at this is always questionable unless u test it in lab conditions.

cpu8088

正式會員
115.xxx.xxx.214

2010-08-05 05:28

[#5] 大功放推小喇叭....會點?
大功率推小喇叭會......從容不逼!

wings8899

正式會員
218.xxx.xxx.49

2010-08-05 19:53

[#6] 大功放推小喇叭....會點?
大功率推小喇叭會......變中形喇叭

timmywan

正式會員
119.xxx.xxx.110

2010-08-05 21:33

[#7] 大功放推小喇叭....會點?
Basicaly this is a good selection. Of course should be subject to the quality of the amp and speakers that you selected.

Lowther

最後修改時間: 2010-08-05 21:45:17

lowther_chan

正式會員
61.xxx.xxx.196

2010-08-05 21:44

[#8] 大功放推小喇叭....會點?
大功率推小喇叭會......從容不逼! x2
大功率推小喇叭會......變中形喇叭 x2

watchmanll

正式會員
183.xxx.xxx.4

2010-08-05 23:00

[#9] 大功放推小喇叭....會點?
more power means more control

sw69

正式會員
218.xxx.xxx.25

2010-08-06 11:05

[#10] 大功放推小喇叭....會點?
power does not mean control

slew rate and damping factor are the measurements

most people listen to music about 60 to 80db and rarely go over 90db

if u calculate power required for 80db at sitting position 10 ft from speakers, with a pair of speakers 89db sensitivity, the power required is a mere 1 watt

http://myhometheater.homestead.com/splcalculator.html

cpu8088

正式會員
115.xxx.xxx.214

2010-08-06 11:13

[#11] 大功放推小喇叭....會點?
IMHO, personal experience is most case big power amps drive little speakers has very tight , controlled, overdamped, unreal , tired to ears feelings. I rather prefer small watt tube amp driving big big efficient speakers , more liguid and relax sound. Of course it's not easy to place big speaker in common smaller living room in Hong Kong.

diytfy

正式會員
155.xxx.xxx.45

2010-08-06 11:28

[#12] 大功放推小喇叭....會點?
diytify hing.
i agree with you.

billeung

正式會員
118.xxx.xxx.238

2010-08-06 11:32

[#13] 大功放推小喇叭....會點?
I have been using 500W amp to drive 100-150W speakers and they always sound good and I do not think it is a mismatch.

The only time I hesitated was the time I got a Rogers LS3/5a 15W that its crossover was made with "transformer" type component. I was worried that the high power would blow up the transformer.

But otherwise, good amp (usually comes with power) is the heart of system. A good heart does not mean that the person has to run all the time and cannot sit down ^_^ or walk slowly.

Kenny

正式會員
146.xxx.xxx.21

2010-08-06 13:21

[#14] 大功放推小喇叭....會點?
Don't worry. They are "usually" matched and good in feeling.
The watt in speaker defines continuous power. In fact, power in music is coming in form of pulsative and impulsing. I heard most small speakers from Proac, FA, Jmlab, and Elac which sound more vivid with higher power driven. The only exception is LS3/5A.

kktube

正式會員
61.xxx.xxx.181

2010-08-06 22:42

[#15] 大功放推小喇叭....會點?
Most of people only concern the power to determine a amp is good or not, but they don't know that many of factors should be considered other than power. For example: current, damping factor.

最後修改時間: 2010-08-07 11:11:10

howin

正式會員
116.xxx.xxx.189

2010-08-07 11:09

[#16] 大功放推小喇叭....會點?
nelson pass always stress the importance of the first watt.

200w and 400w the difference is only 3db. not much at all

cpu8088

正式會員
115.xxx.xxx.214

2010-08-07 15:55

[#17] 大功放推小喇叭....會點?
You raised a good point about relationship between power and loudness! Every increase in 3dB means doubt the power. In other word, power of 1W gives loudness of L. Hence, power of 2^n gives L + 3n.
For 400W, n=(log400)/(log2) = 8.64,
then L+(3*8.64) = L+26dB.
If the speaker has 86dB/W in spec., loudness is just 112dB! Ha..ha, if 112dB comes from 1kHz, my ears cannot bear. If it comes from 70Hz, I love such as bass excitation!
Be reminded that we are more sensitive to mid frequency in dB but not to low and high freq.

最後修改時間: 2010-08-07 19:32:03

kktube

正式會員
61.xxx.xxx.181

2010-08-07 19:24

[#18] 大功放推小喇叭....會點?
我現在都用Krell 100瓦純A推隻洒桶仔, 效果超乎想像, 估唔到隻洒桶仔係咁揪得,唔知以為緊D大單元低音

roger456

正式會員
203.xxx.xxx.239

2010-08-09 12:14

[#19] 大功放推小喇叭....會點?
Krell 100瓦純A推隻洒桶仔