將Jamo SUB 800 (=MM6) backfire 擺
雖然換左LX83, 但都係覺得超低音冇咩feel (當然我個十仔細, 效果點都有限), 所以嘗試改為backfire 面向牆, 結果........ {:6_138:} 我老細問點解可以唔同哂既? 勁左咁多既, 係咪開大左聲咋.... {:6_134:} 其實啱啱相反, 轉左backfire之後我要調低左1dB至真, 估唔到真係可以有咁大分別, 連包圍感都好左, 好似將個十仔重新咁, 不過未有時間真正慢慢試邊個phase最正, 暫時都係扭到10度左右. 如有咩高人可以指點一下個phase應該點教就最好不過 {:6_182:}有時間我又試下掉轉個低音下,師兄,你隻低音phase係咪090180270? 有時間我又試下掉轉個低音下,師兄,你隻低音phase係咪090180270?
lawzelda 發表於 2011-3-2 02:52 http://www.post76.com/discuss/images/common/back.gif
唔係, 我隻十仔phase係可以任扭0~180, 冇fix死度數既 回復 1# leo25
My old post FYR:
個phase...簡單2句, "相位" 係 0-360度 "Waves / phase of sound "聲音的度數...
與 "degree of subwoofer positson " subwoofer 面向角度度數並無直接關係...0-360度係好多ching的迷思
只知大多數都係 "0" <<< 我估係理由係好多人唔識就set"0"lor...否則
如有0 & 180度選...0只係1/2機會
如有0, 90, 180, 270度選...0只係1/4機會
如有0 -360度無段選...0只係1/360機會...就算面向那,都係1/360, 所以正確的0度冇理多過一半...小弟現玩面向皇帝位同backfire 都用正確相位180...
θ is sometimes referred to as a phase-shift, because it represents a "shift" from zero phase. But a change in θ is also referred to as a phase-shift.
For infinitely long sinusoids, a change in θ is the same as a shift in time, such as a time-delay. Ifis delayed (time-shifted) byof its cycle, it becomes:
但Phase 只關 Front, subwoofer, king seat 三樣事, test 開CD 2.1 , 用5.1會亂...
Phase 係0-360度...放邊到 前/後 都有齊0-360...唔會後有前冇..., 即以面向皇帝位, 一定會出現齊0-360度的機會, 只要距離改變, 例如加/減半個phase(180)的距離,其他數據, 前置不變, 面向皇帝位0度, 就一定會變面向皇帝位180度才正確,
故面向皇帝位是完整0度, 是有1/360的機會是對的
sub 的phase 與前置的phase 相同, 就會相加in-phase 即正確相位, 相反就相减即out-phase
基本上是沒有可能在沒有前置的資料下會預知正確的subw phase, 例如用反相spk又如何會正確?例如用不同的amp, spk距離又怎樣一樣subw phase...?
用2.1坐皇帝位test, 就是把 Front, subwoofer, king seat 三樣事的資料結合才得知phase issue 回復leo25
My old post FYR:
個phase...簡單2句, "相位" 係 0-360度 "Waves / phase of sound " ...
Einstein 發表於 2011-3-2 09:55 http://www.post76.com/discuss/images/common/back.gif
Thanks Einstein 兄....好複雜.....即係backfire應該用180度 ? Thanks Einstein 兄....好複雜.....即係backfire應該用180度 ?
leo25 發表於 2011-3-2 11:28 http://www.post76.com/discuss/images/common/back.gif
我諗 ching 既意思係, sub 既方向同 phase 無關, 如果個擺位係 phase 180, 你向皇帝位或向牆都係 180,
有錯請指証。 你自己手持音壓計 , 再叫你老細幫你係個十仔道慢慢較個相位 .
邊段最大果個就係正確嘅相位 . 你自己手持音壓計 , 再叫你老細幫你係個十仔道慢慢較個相位 .
邊段最大果個就係正確嘅相位 . ...
HP2210 發表於 2011-3-2 11:47 http://www.post76.com/discuss/images/common/back.gif
係咪要同前置一齊試？ 係咪要同前置一齊試？
minimoai 發表於 2011-3-2 12:09 http://www.post76.com/discuss/images/common/back.gif
No , please use your AV AMP test tone , test the sub woofer only . No , please use your AV AMP test tone , test the sub woofer only .
HP2210 發表於 2011-3-2 12:23 http://www.post76.com/discuss/images/common/back.gif
明白 .. 如果無音壓計有無計？