回復 10# KING
King Sir,
JL Audio Pathom series,Velodyne DD Plus Series Manual都指明接駁AVR LFE Sub out,只須 mono RCA線接入 Subwoofer RCA (LFE) In便可,EarthQuake SuperNova MKVI 就說:
Usually one RCA has enough signal to drive the IQ amplifier to its full output. However, in some cases where signal is too low for the IQ amp to produce its full output, you may use a "Y" connector to increase the amp's sensitivity.
現看看以下hyperLink:
http://www.post76.com/discuss/viewthread.php?tid=111928&extra=&page=1
在以上極端情況,可能LFE弱到連Sub 仔都叫唔醒,就嘗試使用"Y" connector,有等線商便一於造啲一端有"Y"的尾巴 Sub仔線出來,又加上有等Sales為滿足顧客好奇心,或者有啲本身都蒙查查,信口開河,便叫人買條有"Y"的Sub 線交待,還有啲更誇張地話呢啲先係100%真正Sub 仔線。
用此等線,理論上是無害的,但心思思刻意追求,以為會加強Sub仔效果,就無為啦。
至於RCA >>> XLR 線的神話,網上有人DIY過出post,話說駁咗之後,好似脫胎換骨咁正。好簡單,走去買粒XLR/RCA adaptor,用他錶check check XLR端的(1)ground和3(-),就發現它們是100%相通,其實整條RCA/XLR線就前、後都只是一(正)和一(負或網),與前後RCA的線相比,除尾插頭外貌不同外,訊源線路完全一樣,以致power amp內XLR circuit已被bypass,就等同本人的Pass Labs X600.5,將jumper插入XLR In的(1)ground和3(-),這時X600.5已不再行Balanced 線路,才可使用RCA線,道理一樣。
我曾見網上有人建議用啲两蕊一網線DIY RCA/XLR線,在RCA端將網 open,XLR 邊則1 (G) 2(+) 3(-)照接,另亦有建議RCA端,(-)和網相連,XLR端,將1 (G)open,真唔知佢哋用起來隻喇叭有無燒咗,定話佢哋啲power amp XLR Input,是假到無朋友。
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