review33.com:影音天地:Speaker 有氣孔反射VS密封式?

分類搜尋 移民 | 借錢 | 投資 | 物流 | 搬運 | 按揭 | 樓盤 | 保險 | 機票 | 酒店 | 升學 | 補習 | 手錶 | 電腦 | 紅酒 | 網購 | 脫髮 | 健身 | 減肥 | 濕疹

影音天地主旨 ﹝請按主旨作出回應﹞ 下頁尾頁

寄件者

傳送日期

[#152] Speaker 有氣孔反射VS密封式? 市場上大部份也是有氣孔，代表什麼？		aheung 會員 219.xxx.xxx.2	2018-09-19 08:13

[#151] Speaker 有氣孔反射VS密封式?
All manufacturer design the speaker in anechoic chamber, because they didn't know your room envoirnment, for my home, the port tuned to 30Hz, but using a spectrum analyser, I found there is a peak on 30Hz and a dip of -8dB on 45Hz, so that I change the port frequency to 45Hz, the response is more flat

im1663

正式會員
220.xxx.xxx.73

2009-10-26 16:28

[#150] Speaker 有氣孔反射VS密封式?
Sorry brother, I find many of my post have been cut and even my account, I don't know why.

I am quite sure the measurement you find in adding the factor of room gain do not really mean you system in your room can generate the actually bass tone during music replay.

Trust your ear, comparing your listen experience with large multi-ways floorstanding speakers in very large hall and your bookshelf speakers in your living room, sure you will find the bookshelves have no extreme bass performance no matter how expensive they are.＞＞＞

I have asked one expert of speaker designer, he have explained to me some reasons for this, but my knowledge do not allow me to understand very well.

what I can summaries is the measurements you see in some reports adding the factor of room gain is not really showing the fact.

Anyway, I hope some other experts in this forum can teach me about it.

支持基本自由人4

正式會員
116.xxx.xxx.11

2009-10-17 08:02

[#149] Speaker 有氣孔反射VS密封式?
I have also stated before that I don't think phase delay in low bass would affect the performance obviously, because the wave length in low frequency is very large, the wave of low frequency overlapping with other wave is very unlikely chance. You can see some speaker designs do not align the bass drive in the front of the speaker cabinet, showing some designers may not really not concern about the phase changes in low bass woofer.

支持基本自由人4

正式會員
116.xxx.xxx.11

2009-10-17 07:49

[#148] Speaker 有氣孔反射VS密封式?
Sorry brother, I find many of my post have been cut and even my account, I don't know why.

I am quite sure the measurement you find in adding the factor of room gain do not really mean you system in your room can generate the actually bass tone during music replay.

Trust your ear, comparing your listen experience with large multi-ways floorstanding speakers in very large hall and your bookshelf speakers in your living room, sure you will find the bookshelves have no extreme bass performance no matter how expensive they are.

最後修改時間: 2009-10-17 07:53:16

支持基本自由人4

正式會員
116.xxx.xxx.11

2009-10-17 07:40

[#145] Speaker 有氣孔反射VS密封式?
Hi WSlam,

I wasn't happy about spectral's warranty policy neither but what the heck, I wasn't unhappy enough to switch to amps I like less, I am not picky about cables anyway, MIT it is.

With all said about room gain, would it be wrong to say that 'ALL' speakers are designed to 'ONLY' work best (flat response) in an environment with certain characteristics (acoustically) ?

Hi 支持基本自由人,

I cannot disagree more with your comment 'it's not very meaningful to consider the measurement after room gain', especially the 'similar bass performance' part. I think the exact opposite is true in real life. It is a fact that listening environment has a big impact on sound reproduction. Although I am no acoustic engineering expert, I suspect a steep rolloff is less desirable than a gentle one 'AFTER' room gain because sound energy does not built up linearly, a steep roll off will create a much bigger hump in certain frequency.

t4455

正式會員
210.xxx.xxx.39

2009-09-21 00:03

[#144] Speaker 有氣孔反射VS密封式?
cpu8088

冰箱內冬眠有冇加拿大咁舒服呀？你仲未醒呀？

孟波

正式會員
218.xxx.xxx.240

2009-09-20 23:03

[#143] Speaker 有氣孔反射VS密封式?
＞＞whats the use of posting photo about tortoise in a fridge? ＞＞

cpu8088

難道你看見它們不感高興？那冰箱舒適嗎？lol

孟波

正式會員
218.xxx.xxx.240

2009-09-20 21:04

[#142] Speaker 有氣孔反射VS密封式?
cpu8088

hkghuman

正式會員
61.xxx.xxx.216

2009-09-20 13:10

[#141] Speaker 有氣孔反射VS密封式?
"""上次有位紳士都鬧你係"狗"啦"""

who? your daddy?
only a fool would be described someone as 紳士 who speaks rubbish?

cpu8088
會員
115.xxx.xxx.214
09-09-20 04:53

cpu8088,

那紳士和我的共同點就是對你這種廢物不假辭色地直斥其非，如果你認為有人同你有共同點就可是係你老豆的話，呢d就係你既經驗？

那麼由石塘咀去到中上環，你實碰到好多對住唐人講英文，又自命只用英文而唔用中文，唔睇中文書既偽鬼佬，同你咁多共同點，難道............驗下DNA好喎。

呀仲有，那紳士係全程用英文同你對話，called you DOG！

DOG英文黎喎，你應該好自豪受落架。

孟波

正式會員
218.xxx.xxx.240

2009-09-20 11:23

[#140] Speaker 有氣孔反射VS密封式?
i still hold the view that chinese mags are not worth reading. whats wrong with that? ＞＞＞＞＞＞＞＞＞
(呢段英文我唔識講, 但識貼^^)
agreed x N
相對如"音響論壇", "Stereo Sound" 等比較熱門音響雜來說, 本港的就真係內容比較貧乏(廣告多於一切), 又唔平, 感覺有d搵笨.

catwong

正式會員
219.xxx.xxx.108

2009-09-20 10:10

[#139] Speaker 有氣孔反射VS密封式?
"""sealed box要點擺呀？"""

i believe u can find answers from chinese magazines new or old and look at the photos showing speaker positioning. lol

cpu8088

正式會員
115.xxx.xxx.214

2009-09-20 06:29

[#138] Speaker 有氣孔反射VS密封式?
whats the use of posting photo about tortoise in a fridge?

should be either speaker cables, interconnects or power cords. lol

cpu8088

正式會員
115.xxx.xxx.214

2009-09-20 06:17

[#137] Speaker 有氣孔反射VS密封式?
"""乜你好驚我用中文咩""" ???
i just afraid u use body language. lol

"""我老豆的確有叫我對住d偽君子，出言不遜，先撩者賤既廢物唔好客氣，一於插到佢盡，無須扮斯人。"""

what is that 斯人??? i dont understand.

yep i still hold the view u wont dare to use english to reply.

"""The rigid the material, the higher the Q. so we need different materials to damp the vibration as dead sound and transfer vibration to heat energy rather than sound energy."""

have u got a chance to explain how to "transfer vibration to heat"? also your mentioned "material" are u referring to cabinet material or driver cone material? how to get the q total and relevance of qems if you are referring to cabinet?

cpu8088

正式會員
115.xxx.xxx.214

2009-09-20 06:06

[#136] Speaker 有氣孔反射VS密封式?
"""經常貶低中文音響雜誌和看書的讀者，以為自己睇Stereophile就真係高級左，真可笑。"""

i dont buy stereophile. only sometimes visit their website.

i still hold the view that chinese mags are not worth reading. whats wrong with that?

cpu8088

正式會員
115.xxx.xxx.214

2009-09-20 05:51

[#135] Speaker 有氣孔反射VS密封式?
"""兩者在設計喇叭Qoc時根本不能分割計算，係DIY友都知道woofer俾個Q你設計就係total Q."""

of course some diyers cannot. but the good ones will.

driver manufacturers quote specs to include qms and qes with reasons. not just q total.

cpu8088

正式會員
115.xxx.xxx.214

2009-09-20 05:27

[#134] Speaker 有氣孔反射VS密封式?
"""上次有位紳士都鬧你係"狗"啦"""

who? your daddy?
only a fool would be described someone as 紳士 who speaks rubbish?

cpu8088

正式會員
115.xxx.xxx.214

2009-09-20 04:53

[#133] Speaker 有氣孔反射VS密封式?
D鬼佬唔識寶 ^^

catwong

正式會員
218.xxx.xxx.160

2009-09-19 19:29

[#132] Speaker 有氣孔反射VS密封式?
英國老婦用冰箱幫75隻烏龜冬眠......仲以為賣龜靈膏潻..