Heard someone said in a hifi shop claiming the ultimate "good" sound could only come from 電子分音 by using mater record (mother tape) as source.
Agree or not?
Cheers

4 channels of 電子分音:

Master tape ＞ LP ＞ CD

My 2 cents :

First part, about electronic crossover - not necessarily.

Second part, about mother tape - No. Why didn't he tell you that having Heifetz playing live in front of you should even be better.

thomasc2 hing

Knowing you are a highhand in DIY, therefore very keen to hear more from you about why electronics crossover is not necessary.

the more electronic components, say 8 monoblock amps for the b and w nautilus (quote from specs: each channel to have identical gain and phase), may introduce more distortions, phase incoherence, wrong level matching.

in general u become another sound engineer doing the remixing.

cpu8088 hing is always rational and logic. Welcome. Anyway but I think 電子分音 is more than just placing monoblock(S) pushing treble and base, right? It also involved the following you mentioned in other post:

QUOTED:
do you mean in the analog or digital domain?
what are the differences?
do with or without the passive crossovers inside speakers?
how you control the output levels of tweeters, mid/bass drivers to be the same?

did i mention "say" meaning for example?

Ok, in that case, pls let me rephase:

Anyway but I think 電子分音 is more than just, say of example placing monoblock(S) pushing treble and base.

cpe8088 hing is 100% correct,

"u become another sound engineer doing the remixing "

But I would replace remixing to "remainings"


cool ! ^__^

I tried replaceing speaker cable, which gave obvious better difference. I started to think of more effect from the passive networks , which is a much bigger evil than a sub-standard cable.

It's true that become ultimate ; if we aim to connect our speaker unit directly to an amplifier - without some big component in between.


Without understanding the original design and doing active in a ready-commecial speaker box. It's like playing a failure game.


That's not easy without testing instrument to re-align the phase, balance of tonal quality and overall response curve, no free lunch.

電子分音，搞得好，當然好，搞得差，會非常難聽!
被動分音不一定差，因可以set相位補償及阻抗補償等，電分就一般上不可.......
但電分的優勢，為每amp只放大某頻率，該頻率直接給某單元，
聲音可以好清及快，當然亦可以得d噪音!

而家有很多平價方法玩,如數碼電分.....

電分樂趣之處是，你做廚師，你自決定amp及單元，及點"安置"呢班家伙"和諧共處" 包括set恰當的分頻點/斜率/電平/EQ等等.............

最好用晒一類聲既 amp,功率可以不同....
及全用一隻線，否則所謂"銀行高，銅行低" 只會增加混亂!

其實現在很多高級的有源speaker都係內置電子分音, 如ATC, Dynaudio專業....
那些便是廠方調教好的電分系统, 有興趣可以去試聽下.

下面B&W是原廠電分嗎?
是的話，那是人家精心於廠調整出來，其中唔排除加上某些被動線路，如前講，相位補償等等......

一般成品喇叭，最好不要亂搞電分，多數失敗收場.....

如果該喇叭是"電分Ready"咁當然唔同!

Anyway but I think 電子分音 is more than just, say of example placing monoblock(S) pushing treble and base.
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電分當然唔係如上咁簡單喇!
其中係電分器之調整，單元選配，擺位，必須一一搞過，要很大耐性，否則勸你唔掂好過!

a lot of problem in 電子分音

a lot of knowledge and experience are required

if you can't play single amp well

don't touch 電子分音


starting from two ways ( a easy way )
cutting below 300hz is OK !
it is not so sensitive !

bass need more power , you get the efficiency of no passive crossover, your power amp can directly control the woofer.

staring from 3 way, it is a long road !!

good luck !

"""placing monoblock(S) pushing treble and base."""

placing monoblock(s) to drive treble and mid/bass is called biamping, triamping, quadamping....

If you have money, the 4 channels 電子分音 of B&W is well setup for you. All you need to do is just buying 8 mono blocks & cables! I don't think it is too difficult, right?

hifi oldman opinion is good

that is why it is easy to design a 2 way speaker than a 3 way and more difficult to do a 4-5 way speaker, so are problems with crossing over


1) you have to ensure the tweeter sensitivity is the same as mid/bass. in passive crossover network there may be a L-pad to match these sensitivities

2) 1st order crossover is simple and use less electronic components but the phase is out by 90 degrees. 2nd order crossover uses more electronic components but the phase is out by 180, 3rd order more and phase out by 270 degrees. then 4th order by 360 degrees. so there is a time lag with sound travel from driver to your ears. some speaker designers use driver positioning to refocus the phase shifts.

3) passive crossovers and active crossover are 2 different things.

crossover in analog domain like your ordinary passive speakers is one example. your av receiver doing crossover of sub bass in digital domain is another method.

so if you have analog signals and using an AD Converter to convert from analog to digital then crossover and then use a DAC to convert from digital back to analog there may be lots of distortions and losses
4) if you use different amplifiers for tweeters and mid/bass there may be problems too. first about output damping slew rates sonic characteristics or house sound matching (you cannot guarantee amp of 100w output and 500w output from same company sound the same)

"""If you have money, the 4 channels 電子分音 of B&W is well setup for you. All you need to do is just buying 8 mono blocks & cables! I don't think it is too difficult, right?"""

the crossover comes with the nautilus. i heard a guy bought a pair after a visit of b and w factory and set up with 8 krell monoblock evolution 600 and all krell electronic front and pre amp recently. my friend had an audition and he considered very very nice sounding. but then it cost hk$3 million all up.