Basic Circuit (BALANCED AND UNBALANCED)

hikaru

有興趣可以研究一吓, 可能對想買 onkyo pre-amp. 既人有幫助.

http://www.jensen-transformers.com/an/an003.pdf

hikaru

BALANCED
Balance is defined in
terms of the impedances of the two signal conductors with
respect to a reference, which is usually "ground".

UNBALANCED
An UNBALANCED input or output connects one of its
signal conductors to ground and has a non-zero impedance
at the other signal conductor.

kleehkg

Thanks for sharing....

kachow

個陣聽過Balance有3種..

假平衡:
有XLR接頭,但係無Balance應有既電路. 尤如一個XLR to RCA轉換頭咁. 其實呢d情況插RCA好過.

真平衡分開兩種:
1. 有齊Balance應有既電路.能夠將XLR既訊號轉化到機內所需既訊號. 而Amp就用呢d訊號去放大. 比較高級既機又或者重視機內物料例如金仔都係用呢種Balance. McIntosh後級大部分都係由呢種Balance構造. 呢種Balance方法好處係能夠隔絕線身傳送出黎既雜訊.

2. 更加複雜既Balance電路, 呢種係外國先叫True Balance,又或者"全平衡線路" 原理係XLR線既每一條正負都有獨立既Balance火牛. 個Balance電路比一般多一倍. 而過程無任何轉化既動作. Balance訊號直接由線到入,跟住直接放大.減少失真. 金嗓子最高級型號, McIntosh 1.2kW 後級就係用呢種True Balance.