Subwoofer推介~

magkids

個sub有crossover同gain我全部都係係一半
crossover 50-200
gain: min->max
heero503 發表於 2009-7-21 11:47

基本上 Gain 係可以推盡，只要Low Hz 攪得點
同拍邊係無關係

mankoo米高

小弟最近回歸AV.....
昨晚看Iron Man的時侯發現用左十多年的AR woofer拍曬邊,-到-5-6db都係拍邊
如果buget(5-6k樓下)有限,只係想買隻唔會拍邊的Subwoofer可以用邊隻
我聽野地方大約300呎到長方形...
bass ...
heero503 發表於 2009-7-21 09:51

SVS PC12-NSD,SUNFIRE HRS-10

heero503

SVS PC12-NSD,SUNFIRE HRS-10
mankoo 發表於 2009-7-21 13:04

師兄好毒下喎SVS / Sunfire.....

justjust

小弟最近回歸AV.....
昨晚看Iron Man的時侯發現用左十多年的AR woofer拍曬邊,-到-5-6db都係拍邊
如果buget(5-6k樓下)有限,只係想買隻唔會拍邊的Subwoofer可以用邊隻
我聽野地方大約300呎到長方形...
bass ...
heero503 發表於 2009-7-21 09:51

其實"拍邊"係咩意思呀? 小第係新手, 唔好意思...

alzard

其實"拍邊"係咩意思呀? 小第係新手, 唔好意思...
justjust 發表於 2009-7-21 13:35

Here is how a SB12+ limiter kicks in when the volume is too high.  Limiter used to protect the woofer from physical damage.


Usually 拍邊 refers to the driver extend to the limit and you will heard hard material crashing together, which sound even more awful then the video above.

magkids

magkids hing,

咁依亇情況較lowpass filter 定highpass filter?
ryanenen 發表於 2009-7-21 12:06

較high pass
但未必隻隻subwoofer 有，同埋會少左低頻

justjust

understood

magkids

其實"拍邊"係咩意思呀? 小第係新手, 唔好意思...
justjust 發表於 2009-7-21 13:35

見下圖from hometheatershack

Cone Excrusion 係個driver 響唔同freqeuncy 個one way 距離
SPL 係Sound power level

每個driver 有自己physical limit, 即係個膠邊
見唔見到響cone excrusion 有條線響22 mm
即係 如果無high pass filter(灰線),  響14Hz 會拍邊
有filter ，紅線，會降低14hz ge SPL從而減少 driver 幅度

magkids

Magkids hing,

以我所知, subwoofer's highpass filter 係咁用:

駁法:
1.由av amp subwoofer/ pre-amp output signal to subwoofer line in

2.由 subwoofer line output signal to power amp line in

3.highpa ...
ryanenen 發表於 2009-7-21 14:19

係正確
因為你個high pass 係control subwoofer amp 去喇吧個"最低"frequency

我之前講ge係 av amp 去subwoofer 個"最低"frequency
你講個個case 係 subwoofer 再pre-out 去喇吧

我講梗subwoofer 應"接收" 邊段Hz

heero503

要今晚返屋企看住部野來試先得!
可能我上次手多調左去20Hz出左事!
係咪gain調最大呢?但係到又有另一個post話係crossover到最大gain調到10點至12點之間喎?