sub.w一問

ericbusmo

請問sub.w後面的db and hz怎樣調教

JamesK

1# ericbusmo

db  先 set 中間, 然後調 "大" 或 "小" 聲, 用耳聽。
freq. 可選 "bypass", 咁樣由 av-amp 控制.

ericbusmo

1# ericbusmo

db  先 set 中間, 然後調 "大" 或 "小" 聲, 用耳聽。
freq. 可選 "bypass", 咁樣由 av-amp 控制.
JamesK 發表於 2009-2-11 16:18

bypass是什麼

JamesK

3# ericbusmo
如果你部subwoofer 有 "bypass", 就會明白; 如果無, 咪 set 80 Hz 囉。
即 subwoofer 只處理80 hz 以下d 訊號。
av-amp settibg 亦一樣。

bbaba

eric,

makesure the cutover point of little speaker of 120MX. Otherwise it will loss some of the sound from 80hz to higher.
set cutover point at your amp to provide higher cut off.

forumboy

eric,

makesure the cutover point of little speaker of 120MX. Otherwise it will loss some of the sound from 80hz to higher.
set cutover point at your amp to provide higher cut off.
bbaba 發表於 2009-2-12 10:05

yes..有大無壞..

JamesK

eric,

makesure the cutover point of little speaker of 120MX. Otherwise it will loss some of the sound from 80hz to higher.
set cutover point at your amp to provide higher cut off.
bbaba 發表於 2009-2-12 10:05

Well, if I'm wrong, don't blame me.

It seems to me that the cut-off (cross-over) frequency of the av-amp, say 120 Hz, means that the av-amp will send out the singals STARTING from 120 Hz to all frequencies above to the spks (but NOT the subwoofer) while the av-amp will send the frequencies below or equal to 120 Hz to the subwoofer.
Therefore, if the cut-off frequency of both the av-amp and subwoofer are set to be 120 Hz, no signal will loss. So as the case that if both the cut-off frequencies are set to 80 Hz, no signal will loss.
However, if the cut-off frequency of the av-amp is 120 Hz, (the av-amp are now sending signals between 0 Hz to 120Hz to the subwoofer), the cut-off frequency of the subwoofer is 80 Hz, (the subwoofer will drop the signals with frequency larger than 80 Hz), then the signals between 80 to 120 Hz will loss.
一點愚見。  

wil-wil

Do you mean that we need to set it all speakers to the same frequency as 80Hz?

Well, if I'm wrong, don't blame me.

It seems to me that the cut-off (cross-over) frequency of the av-amp, say 120 Hz, means that the av-amp will send out the singals STARTING from 120 Hz to all freq ...
JamesK 發表於 2009-2-12 14:10

JamesK

8# wil-wil
不, 120 hz 也可以,100 hz 都無問題。
一般而言, av-amp 已處理好各聲道的訊號, 不需要每一聲道去 set 。
        中置spk 只照顧 人聲﹔環繞spks 處理(較高頻)音效﹔
        而前置 spks 處理所有聲音, 但大部份處理極低頻的能力不高, 所以 120 hz 以下給 subwoofer 是理想的分配。

其實, 有些 av-amp 可以將 120 hz 以下訊號同時送至前置同subwoofer ，前置spks就有反應，不過這時有三隻spks 同時發聲, 音場比較難調較。而且就音質而言， subwoofer 出極低頻通常嬴幾條街，讓前置 spks 參與不是好事，所以大部份的方法都係 cut-off，只將極低頻送至 subwoofer。

知識水平有限, 希望無講錯嘢。  

ericbusmo

sub-w..+6db,80hz,自動音埸設定後顯示100hz,sub-w需否再調較