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by aLFFiaN.
Box kici/besar, Efficiency and effectnya terhadap subwoofer Facebo10
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by aLFFiaN.
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 Box kici/besar, Efficiency and effectnya terhadap subwoofer

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Devious
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Box kici/besar, Efficiency and effectnya terhadap subwoofer Empty
PostSubject: Box kici/besar, Efficiency and effectnya terhadap subwoofer   Box kici/besar, Efficiency and effectnya terhadap subwoofer Icon_minitime31/12/2008, 3:48 pm

sekadar menyambung perbincangan yg terhasil dari topik bskleong,


Zeus245 wrote:
ok ka bunyi dia kalau buat 4 biji sub dlm area yng keci?



kippo wrote:
bila box kici, Qtc ko tinggi dan efficiency ko rendah.
Bila Qtc tinggi, bass akan jadi boomy i.e. keras dan bila efficiency rendah, subwoofer memerlukan power yg tinggi untuk memberi SPL yg sama.
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Devious
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Box kici/besar, Efficiency and effectnya terhadap subwoofer Empty
PostSubject: Re: Box kici/besar, Efficiency and effectnya terhadap subwoofer   Box kici/besar, Efficiency and effectnya terhadap subwoofer Icon_minitime31/12/2008, 3:49 pm

zeus245 wrote:
maksub bro kippo, boleh memang boleh bagi tong kici, tapi power dari amp mesti kuat.. itu mcm ka?
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zeus245
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Box kici/besar, Efficiency and effectnya terhadap subwoofer Empty
PostSubject: Re: Box kici/besar, Efficiency and effectnya terhadap subwoofer   Box kici/besar, Efficiency and effectnya terhadap subwoofer Icon_minitime31/12/2008, 4:04 pm

hehehe ada topic udah ne.. hehehhe thanks devious.... more knowledge may be gain thru this topic... hopefully.... jelir

pasal tong kici ne, jarang saya tengok, kecuali tong prefab saja... yng saya bikin semua besar2 ikut sukatan ori... in the future, mungkin akan lebih besar, hehehe tingal mau cari 2 biji sub yng sama (subwoofer biasa saja) dan amplifier yng sesuai....
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Devious
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Box kici/besar, Efficiency and effectnya terhadap subwoofer Empty
PostSubject: Re: Box kici/besar, Efficiency and effectnya terhadap subwoofer   Box kici/besar, Efficiency and effectnya terhadap subwoofer Icon_minitime31/12/2008, 4:31 pm

box kici ni biasanya akan menghasilkan bunyi subwoofer yang keras, sebab Qtc (damping factor subwoofer dalam sistem audio secara keseluruhan) besar, tapi mengorbankan efficiency subwoofer untuk menghasilkan SPL yang tinggi dengan power yang sepatutnya. Dengan kata lain, untuk menghasilkan SPL yang sama, box yang lebih kici perlukan kuasa yang lebih besar.. contohnya subwoofer Jenama XXX dengan box yang mengikut ukuran optima hanya perlukan 500 watt utk hasilkan SPLo tertentu, tetapi dengan menggunakan box kici, subwoofer yg sama perlukan 800 watt utk capai SPLo yg sama..
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under18crew
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Box kici/besar, Efficiency and effectnya terhadap subwoofer Empty
PostSubject: Re: Box kici/besar, Efficiency and effectnya terhadap subwoofer   Box kici/besar, Efficiency and effectnya terhadap subwoofer Icon_minitime4/1/2009, 1:30 am

wah bgs topic nie..dpt timba ilmu lg ttg box nie..asl pkai box kici mmg keras ka bnyinya?x ble ka c lmbut ka?
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kippo
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Box kici/besar, Efficiency and effectnya terhadap subwoofer Empty
PostSubject: Re: Box kici/besar, Efficiency and effectnya terhadap subwoofer   Box kici/besar, Efficiency and effectnya terhadap subwoofer Icon_minitime5/1/2009, 1:28 am

under18crew wrote:
asl pkai box kici mmg keras ka bnyinya?x ble ka c lmbut ka?

tidak semesti nya. Itu ikut design subwoofer tu.

kalo design subwoofer tu untuk main lembut bila di pasang pada box yg kici, efficiency subwoofer tu akan rendah.
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kippo
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Box kici/besar, Efficiency and effectnya terhadap subwoofer Empty
PostSubject: Re: Box kici/besar, Efficiency and effectnya terhadap subwoofer   Box kici/besar, Efficiency and effectnya terhadap subwoofer Icon_minitime5/1/2009, 1:33 am

according to Hoffman's Iron Law, design subwoofer ni adalah compromise antara
1. efficiency
2. box kici
3. main lembut

di mana subwoofer tu hanya akan memiliki dua sahaja daripada tiga items di atas tu.

Contoh nya, kalo ko mo beli subwoofer yang bleh main lembut apabila di pasang pada box yg kici, subwoofer ko akan tidak efficient.

atau kalau ko mo subwoofer ko main lembut dan efficient, box ko kana kasi besar.

kebiasaan nya subwoofer untuk main SQ hanya memerlu kan box yg kici untuk main lembut.
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zeus245
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Box kici/besar, Efficiency and effectnya terhadap subwoofer Empty
PostSubject: Re: Box kici/besar, Efficiency and effectnya terhadap subwoofer   Box kici/besar, Efficiency and effectnya terhadap subwoofer Icon_minitime5/1/2009, 11:38 am

hehehe betui 2... dah saya praktik kan hehehe.. lagi besar tong, lagi bagus
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Devious
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Box kici/besar, Efficiency and effectnya terhadap subwoofer Empty
PostSubject: Re: Box kici/besar, Efficiency and effectnya terhadap subwoofer   Box kici/besar, Efficiency and effectnya terhadap subwoofer Icon_minitime21/1/2009, 12:22 pm

jangan juga telampau besar, ada effect juga sama subwoofer damping, nanti over xcursion bleh terjadi dan pindikla umur subwoofer tu.. Smile
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kippo
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Box kici/besar, Efficiency and effectnya terhadap subwoofer Empty
PostSubject: Re: Box kici/besar, Efficiency and effectnya terhadap subwoofer   Box kici/besar, Efficiency and effectnya terhadap subwoofer Icon_minitime21/1/2009, 8:00 pm

bila kutak besar ni, effect nya lebih kepada mechanical handling menjadi kurang berbanding dengan thermal handling of the subwoofer.

contoh: walaupun subwoofer tu rating nya 500W RMS, apabila kutak yg di pasang tu agak besar, efficiency yg bertambah baik tu akan menyebab kan subwoofer ko dapat bermain sehingga maximum excursion apabila power di beri hanya eg. 300W RMS.
Tapi effect main kutak besar ni ialah low end bass extension ko makin baik menyebab kan sound subwoofer tu lembut dan SPL nya ada rendah sikit (more flatter frequency response). Ngam untuk main SQ Wink

bila saya design kotak subwoofer untuk kawan2 saya, yang paling penting bagi saya ialah efficiency sebab kebanyakan dorang pakai subwoofer yg power tapi amp yg kurang power. Jadi saya dapat maksima kan SPL dari apa yg ada Wink

p/s: amp yg power bukan murah ooo...
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zeus245
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Box kici/besar, Efficiency and effectnya terhadap subwoofer Empty
PostSubject: Re: Box kici/besar, Efficiency and effectnya terhadap subwoofer   Box kici/besar, Efficiency and effectnya terhadap subwoofer Icon_minitime22/1/2009, 11:52 pm

hehehehe betui 2... calculation ok udah... tapi mau belajar bagi brace n resin saja lagi.. supaya kurang flexing.... memang amp power mahal2 itu sebab saya tungu baget mau beli amp... saya masa ne tengok2 itu RF T1k... tapi tak tau lagi lah....
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beautifulcreature
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Box kici/besar, Efficiency and effectnya terhadap subwoofer Empty
PostSubject: Re: Box kici/besar, Efficiency and effectnya terhadap subwoofer   Box kici/besar, Efficiency and effectnya terhadap subwoofer Icon_minitime23/1/2009, 1:28 am

kippo wrote:
bila kutak besar ni, effect nya lebih kepada mechanical handling menjadi kurang berbanding dengan thermal handling of the subwoofer.

Tapi effect main kutak besar ni ialah low end bass extension ko makin baik menyebab kan sound subwoofer tu lembut dan SPL nya ada rendah sikit (more flatter frequency response). Ngam untuk main SQ Wink

bukan box tambah besar SPL ikut naik ke bro..
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beautifulcreature
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Box kici/besar, Efficiency and effectnya terhadap subwoofer Empty
PostSubject: Re: Box kici/besar, Efficiency and effectnya terhadap subwoofer   Box kici/besar, Efficiency and effectnya terhadap subwoofer Icon_minitime23/1/2009, 1:30 am

yg tentukan frequency responce bukan port tuning ke..
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kippo
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Box kici/besar, Efficiency and effectnya terhadap subwoofer Empty
PostSubject: Re: Box kici/besar, Efficiency and effectnya terhadap subwoofer   Box kici/besar, Efficiency and effectnya terhadap subwoofer Icon_minitime23/1/2009, 5:21 pm

beautifulcreature wrote:
bukan box tambah besar SPL ikut naik ke bro..

bila box besar, efficiency increase tapi freq. response makin flat. SPL akan turun. This is for sealed box.

for ported box, it is the combination of bigger box size and higher port tuning freq.


Last edited by kippo on 23/1/2009, 5:25 pm; edited 1 time in total
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kippo
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Box kici/besar, Efficiency and effectnya terhadap subwoofer Empty
PostSubject: Re: Box kici/besar, Efficiency and effectnya terhadap subwoofer   Box kici/besar, Efficiency and effectnya terhadap subwoofer Icon_minitime23/1/2009, 5:23 pm

beautifulcreature wrote:
yg tentukan frequency responce bukan port tuning ke..

both box volume & port tuning freq. affect the freq. response of the subwoofer.
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zeus245
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Box kici/besar, Efficiency and effectnya terhadap subwoofer Empty
PostSubject: Re: Box kici/besar, Efficiency and effectnya terhadap subwoofer   Box kici/besar, Efficiency and effectnya terhadap subwoofer Icon_minitime23/1/2009, 6:48 pm

hehehe kalau tong ngam.. baru mau pikir pasal power apa mau kasi..... makin besar tong, makin besar power itu subwoofer mau hehehehe
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kippo
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Box kici/besar, Efficiency and effectnya terhadap subwoofer Empty
PostSubject: Re: Box kici/besar, Efficiency and effectnya terhadap subwoofer   Box kici/besar, Efficiency and effectnya terhadap subwoofer Icon_minitime25/1/2009, 3:03 pm

zeus245 wrote:
makin besar tong, makin besar power itu subwoofer mau hehehehe

tong makin besar, efficiency makin naik. Power requirement makin kurang.
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zeus245
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Box kici/besar, Efficiency and effectnya terhadap subwoofer Empty
PostSubject: Re: Box kici/besar, Efficiency and effectnya terhadap subwoofer   Box kici/besar, Efficiency and effectnya terhadap subwoofer Icon_minitime26/1/2009, 4:21 pm

betui ka... tapi saya guna tong besar... amp sedang2 pun tak kuat... hehehe maybe itu amp tak ok agaknya :p
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farisya7490
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Box kici/besar, Efficiency and effectnya terhadap subwoofer Empty
PostSubject: Re: Box kici/besar, Efficiency and effectnya terhadap subwoofer   Box kici/besar, Efficiency and effectnya terhadap subwoofer Icon_minitime8/2/2009, 6:29 pm

kippo wrote:
according to Hoffman's Iron Law, design subwoofer ni adalah compromise antara
1. efficiency
2. box kici
3. main lembut

di mana subwoofer tu hanya akan memiliki dua sahaja daripada tiga items di atas tu.

Contoh nya, kalo ko mo beli subwoofer yang bleh main lembut apabila di pasang pada box yg kici, subwoofer ko akan tidak efficient.

atau kalau ko mo subwoofer ko main lembut dan efficient, box ko kana kasi besar.

kebiasaan nya subwoofer untuk main SQ hanya memerlu kan box yg kici untuk main lembut.

wui buli tahan.....thanks...bagus ini point...sori interupted....
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saa3479j
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Box kici/besar, Efficiency and effectnya terhadap subwoofer Empty
PostSubject: Re: Box kici/besar, Efficiency and effectnya terhadap subwoofer   Box kici/besar, Efficiency and effectnya terhadap subwoofer Icon_minitime23/5/2009, 8:42 am

untuk cerita ni, ada sesiapa yang boleh berikan info sukatan untuk box jenis sq n spl yang besa orang gunakan?

tinggi.. (atas ke bawah)
panjang.. (kiri ke kanan)
lebar.. (depan ke belakang)
* untuk lubang angin
- sekiranya bulat, berapa inci? n berapa panjangnya ke dalam?
- sekiranya memanjang, berapa tinggi 9atas bawah), lebarnya (tepi kiri kanan) n
panjang ke dalam ada berapa inci?
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ckmoy007
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Box kici/besar, Efficiency and effectnya terhadap subwoofer Empty
PostSubject: Re: Box kici/besar, Efficiency and effectnya terhadap subwoofer   Box kici/besar, Efficiency and effectnya terhadap subwoofer Icon_minitime23/5/2009, 3:33 pm

sila baca ni...
http://www.bcae1.com/spboxnew2.htm
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saa3479j
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Box kici/besar, Efficiency and effectnya terhadap subwoofer Empty
PostSubject: Re: Box kici/besar, Efficiency and effectnya terhadap subwoofer   Box kici/besar, Efficiency and effectnya terhadap subwoofer Icon_minitime23/5/2009, 5:41 pm

panduan yang berguna thanks bro..
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zeus245
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Box kici/besar, Efficiency and effectnya terhadap subwoofer Empty
PostSubject: Re: Box kici/besar, Efficiency and effectnya terhadap subwoofer   Box kici/besar, Efficiency and effectnya terhadap subwoofer Icon_minitime23/5/2009, 6:57 pm

saa3479j wrote:
untuk cerita ni, ada sesiapa yang boleh berikan info sukatan untuk box jenis sq n spl yang besa orang gunakan?

tinggi.. (atas ke bawah)
panjang.. (kiri ke kanan)
lebar.. (depan ke belakang)
* untuk lubang angin
- sekiranya bulat, berapa inci? n berapa panjangnya ke dalam?
- sekiranya memanjang, berapa tinggi 9atas bawah), lebarnya (tepi kiri kanan) n
panjang ke dalam ada berapa inci?

wah ne susah ne bro... tak semua box sama size... ne semua ikut jenis subwoofer.... seperti d kebanyakan kedai ICE, mereka kadang2 ada yng main antam, 1 size fits all.. ne salah ne, kalau nak ngam betul2, ikut sukatan d beri atau calculate( susah juga ne) hehehehe
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saa3479j
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Box kici/besar, Efficiency and effectnya terhadap subwoofer Empty
PostSubject: Re: Box kici/besar, Efficiency and effectnya terhadap subwoofer   Box kici/besar, Efficiency and effectnya terhadap subwoofer Icon_minitime25/5/2009, 8:51 am

tuan zeus,,

kalau box untuk main spl taw road show woofer jenis s.lab amcm? blh bagi ka? What a Face kc turun laba sikit2 hehehehehehehe
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bearing
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Box kici/besar, Efficiency and effectnya terhadap subwoofer Empty
PostSubject: Re: Box kici/besar, Efficiency and effectnya terhadap subwoofer   Box kici/besar, Efficiency and effectnya terhadap subwoofer Icon_minitime25/5/2009, 10:23 am

Mcm mana maw calculate box ngan btul..? dont know
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