玩 Hi-Fi ，又攪器材，又攪間房 （房間音效第二彈）

[老化]

閒話休提，先睇睇阿 Mike 哥間靚新居 :










同埋，果間未裝修前的 “靚” 房 :

[老化]

如果你係阿 Mike 哥，照估你都吾會傻到，自己去攪間房 lar 。

於是，距好醒目錦，搵左一間專替人攪 room acoustics 的

Rives Audio 泥幫距設計間房。




以下，就係間房的設計圖則 :








建造 E 間房的工程，足足用左６個月時間。




完成後的新 Hi-Fi 房，長、闊、高分別係 29 呎 x 21 呎 x 11 呎。



至於房間內，各種器材、皇帝位等等，如何放置，

左、右喇吧距離 : ３米

喇吧與前牆距離 : ２米

喇吧與側牆距離 : ５米

喇吧與皇帝位距離 : ３米

皇帝位與後牆距離 : １.５米

[老化]

在未詳細參觀距間房的不同部份前，我地先睇下，

E 間勁正 Hi-Fi 房的外觀 :



前部 （即面向楊聲器的方向） :









中部 :









後部（即面向皇帝位的方向） :







各位大佬，細佬我錦年紀 ，睇倒 E 間淨係外觀，

已經正到痺的房間，

坦白話你知，我喊左七晚，

憂鬱左三個月，失眠左半年，

前後睇過七個心理醫生，

至叫做好番 D 炸。

[老化]

但係，阿 Mike 哥 E 間房，並吾係只得個靚字 ，


距入面，其實係機關重重，暗藏殺着。

什麼殺着 ?

[老化]

首先，在兩隻喇吧中間，有一幅呈半圓形的前牆（見下圖）。








E 幅前牆，其實係一幅用以擴散高、中音的擴散器 (diffuser) 。


此外， E 幅擴散器入面，原來係放左一 D 吸音物料，

所以，亦同時係用泥，

吸收房間中央的低頻的 bass trap （見下圖）。








同樣，前牆周圍的天花，左、左兩角的牆身入面，

都填塞左吸音物料，配合用作做牆身的薄木板，

做成多個巨型的 panel (或稱 membrane ) type bass trap （見下圖）。

[chowchow]

頭位

好正呀

[老化]

在皇帝位後面的天花，

以及在皇帝位後面，左、右兩旁，看似唱片架，及 CD 架的後牆，

亦是相似的 panel type bass trap （見下圖）。

[老化]

請留意，從前牆伸出至皇帝位方向的地台，

係鋪左木地板（前後距離係１０呎３吋）。



喇吧係放在木地板邊，緊接地氈的地方。



據講，鋪木地板的目的，係利用木板的反射，

盡量發揮，喇吧發出的能量。

[chowchow]

我做獨家觀眾


PS: 個心跳得好利害

[老化]

房間中部，包括天花，地台，兩邊牆身，地面，

都係第一反射點所在之處。



為左對付早期反射 （ early reflection ），

兩邊牆身，裝上柱型擴散器（見下圖）。
















天花的處理就更精彩（見下圖）。








在天花的凹陷位內，斜斜吊住，一幅幅木板，

都是起擴散作用的擴散器（見下圖）。









據屋主阿 Mike 哥講，

E 幾幅板，對重播音樂的結像，起極重要作用。


有左 E 幾幅野，音樂的結像，絕不會散亂。




地面的處理方法好簡單，

鋪地氈就攪掂。

[老化]

錦究竟，一間用左禁多心力、財力的 Hi-Fi 房，距的音效係點呢 ?

The room is a wonder.

It is hard to be objective about one's own room. From feedback I keep getting, my feeling is that there is agreement that the room is about perfect...

I have realized that the room does have one big problem... there is no place to hide.

Any flaw in recording, recording format, performance, speakers, amps, whatever... that imperfection is exposed for anyone to easily hear. .....




Richard Bird did visit in early November to measure the room. .....

I had already been satisfied with the way it sounded... And yet, I wanted the room to measure as perfectly as possible. .....


Richard was as taken by room as others have been...

then he got out his tools and went to work. Overall, the room measured very well...

in fact, Richard commented that above 134 Hz it was the flattest room he had ever measured.

[老化]

從以上引言可知，E 間房的低頻曲線的平順度，

相信都係民居 Hi-Fi 房中的終極之一 lor 。

no room is flat; all rooms have nodes, nulls and peaks.

In any approximately rectangle room
the listener will be located
along the center line of the long axis (for soundstaging purposes).


Along this axis at any particular point,
there will be a null frequency and a peak frequency in the bass.
The only way to completely avoid this is to flair the room 30 degrees or more…
which then creates other acoustical problems more severe than these nulls and peaks.


The challenge is to minimize the nulls and peaks...
to make them very mild.

In my case I have about a
5dB to 6dB peak at 134Hz,
and a 5dB to 6dB null at 80Hz.
Otherwise the room is pretty flat up and down the whole audio range.

一般家居，在３００週以下的頻應曲線，


其擺動幅度，經常係十幾 dB ，甚至係二、三十 dB 禁驚人 （見下面例圖）。





E 間房能夠做到，只有５至６ dB 擺幅，真係嚇死人。

[老化]

錦 E 間房又有冇缺點呢 ?

The other issue is that my speakers do not go as low in the bass in this room.

My previous room was about 1/3rd the interior volume of this room, and my speakers extended to around 25Hz, pretty flat.

In this much larger room they only go into the mid-30Hz range (the rear ports just can't pressurize this room to the same degree).

It is not a big deal to me, as the bass is, by far, the best, most articulate bass I have ever heard.

你如果睇埋阿 Mike 哥講，距對音響的要求，

就知距係一個幾禁麻煩的 Hi-Fi 奄尖大少。

..... I have never been much of a classical music listener, and almost never to full orchestral works.

Why? Because they almost always sound like crap, or at best not very good... no matter what gear or room I've heard them in.



Not any more.


It doesn't matter what you play... this room/system will portray it in its full glory.

You want size, scale, dynamics... it will deliver.

Without a trace of strain or fatigue.

Each musical element is fully rendered and complete.

You hear musical elements on very familiar discs that you have never before heard... and they are fully realized.

[老化]

阿 Mike 哥 E 加已經係網上 Hi-Fi 雜誌 positive-feedback 的寫手之一。



最後，距有以下的忠告，

比我地只有能力用中、低價器材

的普通發燒友。

the new room is so revealing of tiny differences.....

..... as far as reviewing gear that is has less 'pretensions' than my gear;

i am always impressed when more modest gear can approach the SOTA.......



and many times

modestly priced gear
is not given the chance
to be put into an environment
where it can be optimized. .....

呀 ! 始終人老，都係講漏野。


阿 Mike 哥間房的通風空調系統 (簡稱 HVAC = heating ventilation air conditioning ) ，亦係 Rives Audio 專誠為距設計。

距個最大持點係，部室外機係真真正正放左響戶外。

通風管入面果個風扇組件，就放響 Hi-Fi 房外面的地方，

而且放在避震墊上面，確保距完全冇聲。



電源 ? 直接由電箱抽一條電源線，以 70 Amp 220V 供電。

（距冇解釋為乜要用 220V 。吾通係好聲 D !?）。





其他細節，例如照明系統，隔音門等等，不再詳述。

[老化]

我做獨家觀眾


PS: 個心跳得好利害

chowchow 大大 :

做乜吾去週末狂熱 ?