喺eversolo t8 嗰邊吹水 ,Mr lala 介紹這個東西，要問家人搵一部舊iphone你畀我玩下

記憶力失調，都唔記得十幾年前係點樣度間房，玩過幾次，好奇想了解房間低音嘅特性

Volumio Room Correction

https://housecurve.com/docs/appnotes/volumio

估計我用嗰個超低音係早期真係比人用在電腦睇電影時用嘅超低音，細直徑單元配合單元及箱體共鳴去做出特定低頻，一離開個指定頻率就效率跌得好快，唔適合用於音響重播，現時音響專用超低音其實係正常低音多，設計上已考慮配合線性連接你喇叭低頻。

其實仲有個檯面擋住
歲月低音都有一定穿透力
但係極大部分聲音
係從左右地面後面反射返嚟
聲音與檯面主喇叭有啲難融合

正常嘅一張書枱枱面高度80cm左右小小喇叭嘅承托物。。超低音又擺喺地下，兩個單元距離少過80cm....

如果是作為創作一個分體型嘅三路喇叭，中音與低音的距離定咗個分頻點大概四百幾hz

都係其中一個有根據嘅做法，去試聽下效果，反正有材料在手十幾分鐘就會做好簡單嘅分音
線路

有材料，又有興趣，又有咁高嘅動手能力，真係好玩







最後修改時間: 2026-07-15 01:01:57

#452

其實會唔會係咁呢？

Peter 師兄對喇叭放喺枱面，而 Subwoofer 放喺枱底，就算分頻點設定得幾準、Time Delay 校得幾準，但兩個 Physical 發聲點始終唔喺同一個位置。

cello performance ii

是的其實唔係好大力㗎，所以我時常想試一試加subwoofer，部 amp唔推subwoofer處理部分的低音

音色可以叫做不太美麗(有人覺得完全不美麗，我就覺得是比較不美麗），但我喜歡這種不太美麗的音色，我不喜歡飄逸的，我不喜歡濃烈的...濃烈的飄逸的東西我擁有過，真係覺得佢哋音色真係優美，但係完全不喜歡

強項係，微小的動態對比真係唔錯，層次感真係好出色

好似畀我改電壓搭錯線整壞咗，唔緊要，慢慢玩，反正而家我用部pioneer M72 power 都聽得好開心，實在不夠力 , bass is weak and loose haha haha

真正有力又覺得好聽嘅， krell fpb 450mcx..600 ,重要好立體聲音好有body，但係我鍾意cello 嗰種層次感多一些,這一種音色比較淡淡然嘅感覺，krell 對我口未來說濃烈了一點點，能夠和他共存相處

我玩過的兩個型號fm，真係好靚聲，過份濃烈，聽40分鐘內已經頂唔順了 ，試過之後，完全冇興趣再擁有，佢嗰種介乎喺 sound stage and sound field 之間嘅表達，好真實



最後修改時間: 2026-07-14 21:19:20

#453
Cello performance II
That's legendary
200w class AB should give enough power?
I have not done this myself but have read about, and I am sure you probably would have too, is to use the tube amp for the highs and solid state amp for the mid/ bass.

我以往香港家中 set up 多套hi-fi的

工作空間一套
Living room 一套 （相對簡單聽收音機用的）
廚房一套 （都係聽收音機用的)
Hifi 聆聽空間一套

並非家中的都有三套
貨倉playroom一套 （其實裏面很多套）
辦公室一套 (mainly reel to reel tape,lo fi recording listening)
生產線地方一套

共通點係全部都有fm收音機，我和很多不同年代平價唔同品牌嘅收音機相處過，差不多每一部都不錯的，聲音各有不同，印象最深刻就係銀色面板嗰個年代的technics高級一點的型號，超級嘅接收靈敏度

所以還留有好多玩具 haha

相處得最多就係家中嘅辦公空間，同埋辦公室的一套

Peter 的分享，這一套是很重要的，好可能都是和他相處最多時間的一套


現在我在這裏只set up兩套

Playroom 和工作空間二合為一 ,一套搞掂曬

家中的生活空間只放置一套b&o嘅座枱音響，是用來聽收音機的，好鍾意聽fm廣播的

因為這兩天學懂了比較好嘅藍牙傳送，小小的 topping d50s 和b&o將來會連接上，真係不錯

如果我工作的空間要獨立一套，我都會搞好多嘢






最後修改時間: 2026-07-14 20:59:56

我都試過加超低在桌面系統想加強低音表現，在我系統中個40Hz超低同雙三吋全音喇叭銜接唔理想，我改走佢低音反射筒調至50Hz先好啲，不過都不是真低音嘅音效，只是有啲要求時好過無，所以之後我寧願在喇叭箱開多個大窿裝多個大低音。

多謝這些經驗分享

你講一講我都忘記咗我十幾年前係有這樣做的，但玩咗一兩次就冇玩喇

最後修改時間: 2026-07-14 19:24:09

先要有支咪及電腦用Rew去度
點樣掌握個分頻點及相位銜接
靠耳仔係冇得估

唔知道主持人peter有冇玩subwoofer嘅經驗呢

Yoyoyoyo MD

你的玩法真係過癮，如果我有齊你手頭上嘅玩具我都忍唔住會咁樣去玩一玩

幾個月前唔記得喺邊一個主題，應該係 lalalam ,提及到現代的classd d 模組
跟住我就上網睇下佢個spec佢嗰啲reference design，等等等等，真係好似幾好

直覺上這類型的power amp應該用佢嘅reference design，喺淘寶會搵到好多

跟住就成日留意到，市場上係有一啲二手嘅jbl passive subwoofer ,裏面用嘅driver其實都唔錯㗎，久唔久仲見到鬼死咁平

跟住我個玩具幻想就係，搵一個cheap digital crossover 練習及了解及搵出房間需要嘅各種crossover parameters..,往後先決定點樣搞個crossover

想法有幾個，但係太多玩具玩，玩呢一個需要好多時間準備，因為好的subwoofer位置，應該同我房間其他的雜物位置有矛盾，需要時間準備，畫忽然間好發燒唔玩唔安樂個種感覺出來

Wittmann

Most of the time..my listening level are below 70db and of coz some passages of music goes above 75..or even 80db..

If I listen at mid nite, even lower volume ..

The way u handle make sense ,especially for a active speaker which the internal amp match quite well to the unit bass driver, so the critical is crossover frequency...

My initial thinking..as I am using a cheap and old and not powerful pioneer power amp...or in the future..I may have other not so powerful tube amp but super 3D... If they do not need to handle the power sucking bass frequency, the rest of the task may be easier..lead me wonder the choices of crossover slope

I do have cello performance II idle..but it is not that powerful haha ..and I do have a decent and powerful tube amp in the box ..but too big and hot..I do not want to use it ..

唔知幾時身痕發燒 for subwoofer, especially I know the speaker am using are little bit under sizes for the room ..

最後修改時間: 2026-07-14 15:16:20

Hi hahayanyan

Yea that would be the wisdom behind the crossover
Filter out the bass for the subwoofer so the amp for the speakers is only handling mid/ high = less distortion
I am sending full signal to the active speakers so effectively in my setup the subwoofers are adding ＜70Hz to the active speakers (40Hz -35kHz)
I do that inspired by John Hunter @ REL and because I often listen @ lower volume (60-65dB), so I do that to compensate for the truncated bass

今日有少少换陣
左邊個可變衰減係畀解碼器入前級用
右邊個可變衰減係畀前級去subwoofer
將subwoofer個volume扭大少少
可以每種音樂因應唔同嘅低音量去調節
唔使唔同錄音要走去兩邊
伸隻手去subwoofer後面扭掣

Yoyoyo Wittmann

Very useful tool

I always wonder, if I have that set up, let's say if it is crossover at 70hz..., signal to send to main amp or main speaker is above that crossover point.
Wonder if I only send above..would main speaker have better clarity...since do not have the bass demanding task..

Wish to try and find out in the future...

最後修改時間: 2026-07-14 06:37:04

Hi hahayanyan

Active cross over is DBX234XS. Nothing fancy
Was thinking of SPL active crossover, yet it is way too expensive for me.
The active crossover is to filter out 70Hz and below and send to the dual subwoofers, with the active speakers still receiving full range of signal.
Dual subwoofers are mismatched and only entry level stuff, shared with and recycled from home theatre duties.

hiihi Wittmann

active crossover - happy to share more? analog or ditigal ?

subwoofer too