誤打誤撞下 新手調教十仔 phase 及 距離 分享.

kefana

話說有日 請了2位 網友家訪比下意見.

由於換左隻十仔 (JL 110 ) 已有一段日子. 套架生叫做見得下人.

但網友對我隻十仔 既 FEEDBACK 係負面. 擺位 及調較 都 令十仔 未能 發揮.

於是上網 努力 搵 料. 誤打誤撞下得出 以下 結果. :

上網搵到以下 文章. 同 之前其他 C HING 既 POST 一樣 . 講解 IN PHASE 同 OUT PHASE / SET UP SPEAKER 距離 既 問題.

http://www.soundoctor.com/whitepapers/subs.htm

內文一段教你用 80HZ 調隻十仔.
TRACK 11:  80 Hz, 2 min @ -1dBfs  Using 80 Hz is an easy way to set the relative phase of the JL Audio subwoofers to match the "mains", especially if you are using 80 Hz as the crossover freq, such as when connecting to a Home Theater receiver. However, whether or not you are using a bass managed HT system, or a separate crossover, this method is still very useful.

Method A (easier, but less accurate)  After you have placed the sub where you want it, put YOUR HEAD equidistant between the sub and the speaker it is CLOSEST TO (for example the LEFT FRONT). Disconnect the 'other' front speaker. Play the 80 Hz tone and adjust the PHASE CONTROL of the sub and the POLARITY SWITCH until the bass is loudest and cleanest - in other words, the peak.

Method B (more accurate, and more work...)  Invert the polarity of the MAIN speaker the sub is CLOSEST TO. Disconnect all the other speakers in the room. Place your head equidistant between the sub and the speaker it is closest to. Play the 80 Hz tone. Adjust the phase control until you hear a distinct NULL. (IT MIGHT EVEN DISAPPEAR COMPLETELY) If you can't get a null then flip the POLARITY switch on the JL sub and adjust the phase control again. There should be some setting of the two controls on the JL sub which will provide a rather sharp null - in fact you might be amazed at how easily and completely the bass cancels. Now put the wiring back the correct way to that one speaker. Reconnect the other speaker and you're done.




1.用 80HZ  黎 ADJUST PHASE :  先 DOWNLOAD C HING 所提供 既 80HZ 音頻.

http://www.post76.com/discuss/vi ... ghlight=test%2Btone

以 我 為 SAMPLE .  十仔 放係 前置 既右邊.

  在 AMP 教到 只有 十仔 同 前置出聲.(STRAIGHT MODE OR STEREO MODE ) 同以上文章 既 METHOD B 差唔多.

  無譯錯既話 係要你 教到 IN PHASE 令到 播80HZ 音頻時  係聽唔到 D WOWO 聲

由 PHASE =0 個 時. 播 80HZ 音頻時. 坐係皇帝位上 聽到 WOWO 聲 明顯去左 左邊.

當 PHASE = 90 時. 皇帝位上 聽到 WOWO 聲 似有還無 / 去番正中間.

當 PHASE = 270   時. 皇帝位上 聽到 WOWO 聲 明顯去左右邊.



用 PHASE 135 為 例. 再 試下 龍虎門尾段 小龍大戰火雲邪神 個段,  同之前 PHASE = 0 比教 .

PHASE = 0 個 時 . D 低頻 去 左 個 PAT PAT 位 度.

PHASE = 90 時 . D 低頻 去 番 晒 心口 度.


隻十仔 即刻 生猛晒 . 打心口既感覺 番晒黎.

本人是 新手. 文筆可能有 D 唔倡順.

對於以上調教亦有 好多 有經驗既C HING 提過.

都唔知 對 定係 錯. 望其他 師兄 幫手 測試下 我既做法 是否正確

FIXING THE GROUP DELAY


In the instance of Home Theater processors, there is an easy method. We can take advantage of the somewhat flawed concept of "speaker distance settings" to perfectly fix the sub timing issues. Simply set ALL the top speakers ( L C R Ls Rs) to 7 feet where they belong, and set the sub distance to 18-19-20 feet.Now, because all consumer equipment operates backwards (!!!) you are introducing 10 msec delay TO ALL THE TOP SPEAKERS. Now you can fine tune the phase control on the sub to add a bit more delay to perfectly match the mains and the results should be spectacular. My test CD and the two different procedures to accomplish this are all carefully explained here


我既 set 法係 當 LCR LS RS 係 7呎. 佢叫你將 十仔 DISTANCE 較到 18-20呎.

我羅個中間數 19呎除 7呎 = 2.71倍   再乘 番你 前置同皇帝位距離.

我用呢個方法去較又真係 好左.


有錯既請指教.

bananaman

Very good!
- 發送自我的 iPhone 大板凳應用

pl876

Thanks for sharing

blindfaith3by8

吾知我又得吾得~~~back up tonight try

ahlic

Thank you!! Will try it tonight.

kefana

如果試過真係work既就係度留個言啦

kaikaijason

回復 1# kefana


    等我又返去攪攪佢先, THX

kefana

原來 呢 段 有 講 surround . 我呢d 白痴 又係 睇d 唔睇 d

http://www.soundoctor.com/surround.htm

JKC710

等我都試試呢個方法試先，但係有個問題，會唔會聽70hz果陣又會有偏離？

发送自我的 GT-P1000 大板凳

kefana

回復 9# JKC710


    呢個要你try try先，你有嘅係時間

重有內文有講解決前置同十仔time delay 問題，

例如皇帝位離前置七呎，將十仔距離加至十九呎(內文直譯)調教phase直至pink noise 係正你前面出.

我教左又係好左，

重有佢話雙十係多如。.........對好多人係一大打擊