好唔明, 點解咁多兩聲道 AMP 唔支持 Bi-Wire?

electronic

連我新手都知 Bi-wire 一定好D, 但仲有唔少過萬的兩聲道 AMP無 Bi-wire. 想升級用 2ch amp 都好似降級咁, 因依家 AV Amp 係接 Bi-wire.

除成本問題外, 仲有其他原因嗎?

racewong

Bi amp係指兩部擴音機喎

jackt

話明兩聲道 Amp，當然係得兩聲道啦！ :P

可能樓主係指可以 bi-wire 呀！

electronic

racewong 發表於 2016-7-4 17:03
Bi amp係指兩部擴音機喎

點解我咁問呢, 因為見到 PM8005 都有 Bi-wire, 反而好多貴D 的 2ch amp 都無, 所以覺得奇怪.

electronic

jackt 發表於 2016-7-4 17:07
話明兩聲道 Amp，當然係得兩聲道啦！ :P

可能樓主係指可以 bi-wire 呀！

係呀, 已改了

wcjacky

一般AV Amp的左右聲道是有兩對接頭，但只是可做bi-wire，功放的內部只有左右各一個Channel吧。

jackt

唔奇怪，依家啲廠主張 Single Wire 呀！

而且，冇 bi-wire output 都可以 bi-wire 的 (叉、蕉同時用)。

electronic

jackt 發表於 2016-7-4 17:21
唔奇怪，依家啲廠主張 Single Wire 呀！

而且，冇 bi-wire output 都可以 bi-wire 的 (叉、蕉同時用)。 ...

ching 知唔知點解依家啲廠主張 Single Wire? 對聲音有好處嗎?

hksarac

四对同两对座是一漆样，都是从底板出，用两条线夹落一个座就是bi-wire

jackt

electronic 發表於 2016-7-4 17:24
ching 知唔知點解依家啲廠主張 Single Wire? 對聲音有好處嗎?

喇叭廠商只想客戶更容易發揮到佢地嘅產品，Single Wire 可以令出錯嘅可能性降低，所以現時大多數廠商都傾向用 Single Wire。

話說兩頭，如果用兩對一樣嘅喇叭線做 Bi-wire，得出嚟嘅效果唔會俾 Single Wire 好多少。以一條可以用到全頻嘅喇叭線嚟講，冇乜必要用多一倍成本來將佢分成行高同低，不如換條高級啲嘅線仲好。除非用兩條唔同嘅喇叭線，但 mix and match 嘅結果唔一定比 Single Wire 好，玩嘅成份居多。

dickdoggie

我亦曾向某Hi-end品牌喇叭製造商問過類似問題，他反問：以相同的接柱製作成本計，Bi-wire會比Single Wire好嗎？

sgb

I don't think having 2 pairs of speaker output per channel in either stereo or monoblock amplifiers is much use unless you can separate the LF and HF (by means of an electronic/active cross over) before entering the amplifier. In another words, an amplifier each for LF and HF.

ccli1996

呢個問題都問得幾特別
直覺原因係(但唔一定啱)，AV Amp 一般機身比較大及高(與兩聲道Amp比)正所謂抵食夾大件，係後面裝多2對喇叭接線端子相對空間多啲，比較容易，技術上冇咩難度，而成本也很有限，但對於一部「過萬」兩聲道Amp(當係講緊1至2萬元價位，係兩聲道嚟講，其實都屬於好入門下)，相信部機都唔會屬於好大部果種，要安裝多2對喇叭接線端子可能係空間上真係比較困難吧！

wildmanhk

又或者做廠想法是一部萬多元的合併机斷估唔會玩對十萬計玩bi-wire的speaker呱？所以一般都唔做二對接柱？而相信個別廠家只是一心方便用家玩zone2 speaker或作AV前置speaker輸出用途！

morechoices

請問合拼機 用拉叭線single-wire 出 bi-wire 去speaker ,  作用大嗎?
還是在 speaker 用 jumper 好d ?

Felix

electronic 發表於 2016-7-4 17:15
點解我咁問呢, 因為見到 PM8005 都有 Bi-wire, 反而好多貴D 的 2ch amp 都無, 所以覺得奇怪.

...

樓主幅圖係其實Speaker A/B，而biwire只是Speaker A+B其中一個用途。

愈貴嘅amp愈多數不設speaker A/B，因為多隻香爐多隻鬼，不管是A/B線路或擺多對喇叭。

kmg

平既amp有bi-wire,貴既沒有
好!就bi-wire這個問題

你拆開部有bi-wire既amp,你以為會看到什麼?
裡面有2組後級輸出?當然NO
只是一組輸出分接2組喇叭端子(看來很像是bi-wire)
即係跟就算無bi-wire輸出,但你硬塞2組喇叭線(走bi-wire)
其實係一樣

momei

There have always been discussions about single and bi wiring in forums in the West. Different people, because of their use of different amps and speakers, have come to different conclusions.
In summary:
* If the speaker cable is basic and ordinary, adding one (bi-wire), increases the gauge or strands in the cable, and that may help improve the sound. “May” but not “surely”.
* AV amps providing two output terminals for a single channel is to facilitate connection to more than one speaker. The purpose is NOT to “improve” the sound but to enable the owner to connect to more than one speaker. It is likely that there is only one output stage (not two output stages) in that single amp channel. What about audiophile stereo amps. Providing two output stages in one channel is unlikely to improve the sound, or may even degrade it if only one of the two stages is used to drive a speaker that only has one terminal (no bi-wire option). In that case, the owner MUST buy two speaker cables in order to utilise fully the two output stages. That would be an expensive requirement for those who use Odin and the like, but on the other hand getting very little or even no improvement in sound. Of course the owner may use a jumper to connect the two output stages of the amp to make it  a single stage. So the audiophile amp manufacturer is 捉蟲 to provide two output stages in one channel.

electronic

kmg 發表於 2016-7-4 23:38
平既amp有bi-wire,貴既沒有
好!就bi-wire這個問題

咁D 生產商都幾呃人, 原來係兩點分做4點   

electronic

momei 發表於 2016-7-5 07:06
There have always been discussions about single and bi wiring in forums in the West. Different peopl ...

我的喇叭都有BI-WIRE, 要用 jumper 都有D 捉蟲