調校分頻點一問。

maskedtsang

其實理論唔難明..實際set左crossover frequency之後..
將隻sub仔set得好先係難事 ...
之前用開Denon 2309.. ...
movietoy.maniac 發表於 2011-3-15 01:42

呢個師兄講得好，實戰最重要。大家可以多D分享，實用上的趣事。Auto EQ都係參考下即，唔好太認真！自已接受到先真。如果set 到 sub 仔平時夠聲，大場面又好似超負荷，禁係咪換 sub 仔既時候呢？ 哈！

孤身走我路

睇哂上面所有師兄解說/釋有關SUBWOOFER 分頻點方式 , 小弟都係唔明 , 暈晒.....

sunvar

1. Subwoofer內置分頻調校是用在接駁两聲道用，两聲道L/R pre out是全頻，到達Subwoofer時便需由subwoofe ...
Big_McIn 發表於 2011-3-15 03:26

第2同第3點會唔會矛盾？既然第2點講到”分頻工作便交由AV Receiver/Processor做”，甘如果我個AV Receiver已經set左80Hz，甘subwoofer再set 80HZ以上就無意義啦，因為已經唔會有over 80Hz的聲音去到subwoofer，甘個subwoofer點樣隱形？

唔通你既意思系要將AV Receiver分頻set高於80Hz？比如120Hz，然後subwoofer再set高於80Hz？

請明示，THX

Big_McIn

第2同第3點會唔會矛盾？既然第2點講到”分頻工作便交由AV Receiver/Processor做”，甘如果我個AV Receiv ...
sunvar 發表於 2011-3-15 15:26

A Word About Subwoofer Outputs
The Velodyne subwoofer is designed to operate using the full range audio signal for input when using the digital built-in crossover. Most processors/receivers have a “subwoofer out” jack that is internally filtered and designed to be used with a conventional amplifier and speaker. In some rare cases, combining both an external crossover and the one internal to the subwoofer may result in low output and increased noise. In these installations you may need to bypass the internal crossover in either the processor or Velodyne subwoofer. In some installations, simply setting one crossover to a higher frequency (such as 120Hz) will restore maximum performance. To bypass the subwoofer’s internal crossover when the unit is being fed a low pass signal from another crossover, refer to the SETUP instructions at step 14 (page 24).Note: If not using an external crossover, you should use the built-in crossover for optimal performance.

** Quoted from the manual for Velodyne DD Series**

所以絕對無矛盾，你自己細心想想罷。
   

sunvar

so the best setup is 120Hz in Amplifier and bypass in subwoofer??

chhanthony

so the best setup is 120Hz in Amplifier and bypass in subwoofer??
sunvar 發表於 2011-3-15 16:01

120Hz in Amplifier >>>>depend

bypass in subwoofer>>>>Yes

bbsai

bbsai兄

你嘅解說應該會易明啲
chhanthony 發表於 2011-3-15 00:36

anthony hing,
唔好笑我啦~~我解釋唔係咁詳細~


不如我用一套THX speaker system去解釋:
example : Logitech Z-5500 THX-Certified 5.1 Digital Surround Sound Speaker System
頻率響應
5隻speaker : 80Hz-20kHz
subwoofer   : 33Hz-80Hz (隻subwoofer無phase/cut-off freq.調教)

若果係咁既情況, 我哋只會聽到LFE 120Hz中的 (33Hz-80Hz) 一段....
5 隻speaker 只可以聽到 5 channels Fullband 中的 (80Hz-20kHz) 一段..

若果 onkyo amp. 內 DoubleBass "on"
subwoofer 除了要處理  LFE 120Hz中的 (33Hz-80Hz) 一段外....還要處理 FL/C/FR 80Hz 留下的一段....

另一個問題, 平時THX用80Hz/80Hz, 若果玩dolby用 120Hz/120Hz, 低頻量感會大咗....

chhanthony

anthony hing,
唔好笑我啦~~我解釋唔係咁詳細~


不如我用一套THX speaker system去解釋:
exam ...
bbsai 發表於 2011-3-15 17:36

如果係咁LFE中80-120hz會消失，
而唔會由主聲道去幫手處理...係唔係咁?

bbsai

如果係咁LFE中80-120hz會消失，
而唔會由主聲道去幫手處理...係唔係咁?
chhanthony 發表於 2011-3-15 18:10

如果係咁LFE中80-120hz會消失 : 係~最後 subwoofer 輸出最高係80Hz(LFE channel)
而唔會由主聲道去幫手處理...係唔係咁 : 主聲道唔會去幫手處理 LFE channel, LFE channel 只會在 subwoofer 出現~~
^^

chhanthony

如果係咁LFE中80-120hz會消失 : 係~最後 subwoofer 輸出最高係80Hz(LFE channel)
而唔會由主聲道去幫手 ...
bbsai 發表於 2011-3-15 18:27

I doubt that