Sub-woofer setting請教

chhanthony

假設Sub-woofer條curve係咁



請問各位會揀以下邊一條Main + Sub-woofer呢?

chung190030

師兄有無幅剩係main既curve睇下呢？
因為無理由用main去就subwoofer, 應該係用subwoofer去補main架！

咁如果咁多幅圖, 剩係計最平直既curve黎揀，應該係最尾嗰幅啦！

LK1976

師兄咁快放走JL?

chhanthony

chung190030 發表於 2013-6-25 17:32
師兄有無幅剩係main既curve睇下呢？
因為無理由用main去就subwoofer, 應該係用subwoofer去補main架！

Chung兄

有時間會再放前置嘅圖上嚟。

謝謝先。

chhanthony

LK1976 發表於 2013-6-25 21:38
師兄咁快放走JL?

無換到，都係用緊F110

bmb_hd

"咁如果咁多幅圖, 剩係計最平直既curve黎揀，應該係最尾嗰幅啦！"

Agreed!

mantam121

最尾嗰幅 x 3

chhanthony

噚晚噚晚有幾位網友上咗我度家訪，畀咗唔少意見，試下改改啲setting之後再用xtz度一次，今次條curve好似平返少少，但未實際睇戲去試。
sub-woofer


Front


Sub-woofer + Front (SUb-woofer volume: 11 o'clock Polarity: positive Phase: 0 degree Front crossover: 80hz Sub-woofer crossover: 80hz)


Sub-woofer + Front (SUb-woofer volume: 10 o'clock Polarity: positive Phase: 0 degree Front crossover: 80hz Sub-woofer crossover: 80hz)


RTA: Sub-woofer + Front (SUb-woofer volume: 10 o'clock Polarity: positive Phase: 0 degree Front crossover: 80hz Sub-woofer crossover: 80hz)


Full Range: Sub-woofer + Front (SUb-woofer volume: 10 o'clock Polarity: positive Phase: 0 degree Front crossover: 80hz Sub-woofer crossover: 80hz)

chung190030

chhanthony 發表於 2013-7-2 09:52
噚晚噚晚有幾位網友上咗我度家訪，畀咗唔少意見，試下改改啲setting之後再用xtz度一次，今次條curve好似平 ...

今次有埋front speakers既curve,一對比之下好明顯睇到十仔完全可以填補到front speakers既凹陷區！
就咁睇,以下呢個setting就曲線平直和殘響方面都比另一個setting好,但唯一既問題係究竟你壓低咗sub volume之後,sub既音壓會否比front speakers低咗呢？
Sub-woofer + Front (SUb-woofer volume: 10 o'clock Polarity: positive Phase: 0 degree Front crossover: 80hz Sub-woofer crossover: 80hz)

chhanthony

chung190030 發表於 2013-7-2 10:27
今次有埋front speakers既curve,一對比之下好明顯睇到十仔完全可以填補到front speakers既凹陷區！
就咁 ...

chung190030兄

其實現時就係出現咗有個問題，如果以呢個看似咁平嘅curve用我平時聽開嘅音壓去聽，係會無晒啲低頻，但如果我將sub-woofer嘅volume加大，谷值係唔會有增加，但峰值就更加高，變成兩者差距好大。亦試過喺processor加大sub-woofer個gain 1.5dB，亦係有相同問題，即係話條curve係唔會因為加大sub-woofer volume/gain而線性地一齊提升。

今晚會用比平時大啲嘅音壓去試下戲，如果都係無低頻，就會試下將sub-woofer以外嘅七聲道全部減3dB，之後用平時大3dB嘅音量去試下，問題係master volume大咗亦唔一定谷值會提升，可能master volume開到幾大，40hz係50dB就係50dB。

chung190030

chhanthony 發表於 2013-7-2 10:48
chung190030兄

其實現時就係出現咗有個問題，如果以呢個看似咁平嘅curve用我平時聽開嘅音壓去聽，係會無 ...

照咁睇似乎係典型既room mode問題！相信你就算減返其它channel既音壓都無乜用！
唯一可以做既就係改變皇帝位位置/改變十仔擺位/改變十仔方向，用RTA睇下係咪得到改善！

chhanthony

chung190030 發表於 2013-7-2 11:04
照咁睇似乎係典型既room mode問題！相信你就算減返其它channel既音壓都無乜用！
唯一可以做既就係改變皇 ...

十仔同皇帝位都暫時唔陏得，所以現時要喺數據同聽感上取平衡。

chhanthony

chung190030 發表於 2013-7-2 11:04
照咁睇似乎係典型既room mode問題！相信你就算減返其它channel既音壓都無乜用！
唯一可以做既就係改變皇 ...

噚晚試過用下面條curve去睇戲真係無令到低頻唔見晒，真係唔見晒

Sub-woofer + Front (Sub-woofer volume: 10 o'clock Polarity: positive Phase: 0 degree elf: -8dB Front crossover: 80hz Sub-woofer crossover: 80hz)


之後要將sub-woofer嘅volume校返去12點位，先至有返正常嘅低頻

Sub-woofer + Front (Sub-woofer volume: 12 o'clock Polarity: positive Phase: 0 degree elf: -8dB Front crossover: 80hz Sub-woofer crossover: 80hz)



Full Range


RTA


睇到就算我將sub-woofer volume加大都只係會令到16hz至5Xhz音量增加，6Xhz打後係無提升。但如果我喺phase唔改變但將Polarity由positive換成negative的話，60hz會boost得好厲害。

Sub-woofer + Front (Sub-woofer volume: 10 o'clock Polarity: negative Phase: 0 degree elf: -8dB Front crossover: 80hz Sub-woofer crossover: 80hz)


所以我相信如果將polarity set做positive係out of phase，但假設我唔能夠用EQ去削平63hz，你地會揀用out of phase而得到較平嘅curve定係會用要一個有高peak嘅in phase setting?

chung190030

chhanthony 發表於 2013-7-3 12:11
噚晚試過用下面條curve去睇戲真係無令到低頻唔見晒，真係唔見晒

Sub-woofer + Front (Sub-woofer volume ...

首先要搞清楚一樣野：
平直曲線時的subwoofer音壓用SPL量度時是否與其餘channel一樣?例如大家都係75db?
如果subwoofer音壓與其餘channel一樣或不比其餘channel低,而你又肯定係in-phase既情況下,相信問題就係你未慣清淡既口味！
相信好多師兄都試過面對過一個問題：就係用eq執靚咗條curve之後,開聲睇戲點解會覺得無乜低頻？無以前咁刺激？但當你加大返整體音壓後,你會發覺低頻比以前更有層次,而且刺激感返返晒黎！

kelvinchow8

chhanthony 發表於 2013-7-3 12:11
噚晚試過用下面條curve去睇戲真係無令到低頻唔見晒，真係唔見晒

Sub-woofer + Front (Sub-woofer volume ...

我個情況同你近似 .

chung190030

chhanthony 發表於 2013-7-3 12:11
噚晚試過用下面條curve去睇戲真係無令到低頻唔見晒，真係唔見晒

Sub-woofer + Front (Sub-woofer volume ...

再睇返你第二幅圖,即係你將sub volume由10點擰到去12點：
我會覺得其實你隻sub仔真係out phase, 原因係當你增加sub volume, 但幅圖顯示係你隻sub仔獨立做野既range音壓係有增加,但在crossover附近就反而係音壓減小咗,所以應該係subwoofer out phase導致到有cancellation出現！

chung190030

chhanthony 發表於 2013-7-3 12:11
噚晚試過用下面條curve去睇戲真係無令到低頻唔見晒，真係唔見晒

Sub-woofer + Front (Sub-woofer volume ...

再睇埋你最後嗰幅圖,即係volume 10點位,polarity係negative:
雖然63hz係有個大peak, 但你留意一下其實63hz個音壓係同你第一幅圖既音壓差唔多,返而crossover附近既音壓比第一幅圖低咗成10個db, 所以我相信如果polarity set做negative之下,你隻十仔真係totally out phase!

chhanthony

chung190030 發表於 2013-7-3 14:48
再睇埋你最後嗰幅圖,即係volume 10點位,polarity係negative:
雖然63hz係有個大peak, 但你留意一下其實63h ...

我反而覺得係room mode問題，睇下subwoofer同front條curve嘅dip都係一樣的。

chhanthony

最新嘅curve，未有機會試戲。

nicknick

chhanthony 發表於 2013-7-4 01:29
最新嘅curve，未有機會試戲。

Anthony兄，開套戲試快過你左check右check圖表；看來你離達成目標不遠，努力呀！