Author Topic: question bout subs (Read 1787 times)

craziechild · « **on:** November 27, 2006, 08:51:34 PM »

hello all...

this question has been pop-up when i am out to look for sub... AFAIK, the larger the sub diameter, the lower it plays and louder too... but most setup i see only use a 12" sub which many claim it is loud as well as low enough.

but why not using 15" sub? would it be better in terms of they play lower Hz and louder? what is your opinion if space is not a problem? 12" or 15" and why?

cheers...

wengweng · « **Reply #1 on:** November 27, 2006, 09:00:42 PM »

By your logic, you should have gotten an 18" instead

llsaw · « **Reply #2 on:** November 27, 2006, 09:22:03 PM »

Nah.. 30" would be better

louis · « **Reply #3 on:** November 27, 2006, 09:43:08 PM »

gimme me a hummer i dont mind putting in 2 x 30" in ..

GRexer · « **Reply #4 on:** November 28, 2006, 02:02:31 AM »

Theoritically, the larger the diameter, the louder and lower it goes, but that's not the ONLY factor, factors like motor structure also plays a roll, as well as other factors.

Most would go for a 12" as it's sort of like "middle line", decent transcient(read: fast enuf like a 10") and goes low enough(read: so called go low like a 15")

Take my explain with a pinch of salt though, i'm really not good in words.

mnkh27 · « **Reply #5 on:** November 28, 2006, 02:03:39 AM »

15" or larger subs have the potential to move more air, go louder and lower but the guestion would be, can it match the front midbass so that the sub does not sound like it's playing by itself fromt he back.

craziechild · « **Reply #6 on:** November 28, 2006, 07:06:28 AM »

haiya sifu wengweng and sifu llsaw... still newbie so ask so tht dun wan to buy the wrong thing ma...

but anyway thank you all for your input...

cheers...

llsaw · « **Reply #7 on:** November 28, 2006, 07:56:04 AM »

My personal preference. On a budget I would stay away from large diameter woofers unless loudness is the only thing you want. The larger the woofer cone the more opportunity for cone breakup and less control giving a loose bass unless you can find a material and construction stiff enough. Wilson and other high end woofers are exempted

llsaw · « **Reply #8 on:** November 28, 2006, 07:58:19 AM »

Quote from: craziechild on November 28, 2006, 07:06:28 AM

haiya sifu wengweng and sifu llsaw... still newbie so ask so tht dun wan to buy the wrong thing ma...

but anyway thank you all for your input...

cheers...

Sifu who? Me no sifu... Cabutz

Newton · « **Reply #9 on:** November 28, 2006, 10:15:13 AM »

Quote from: mnkh27 on November 28, 2006, 02:03:39 AM

15" or larger subs have the potential to move more air, go louder and lower but the guestion would be, can it match the front midbass so that the sub does not sound like it's playing by itself fromt he back.

Totally agree with Mike...

Anyways, why not your let us know how much you willing to spend on your sub?

It would also help if you can let us know your music preference and also u into SQ or SPL...

wengweng · « **Reply #10 on:** November 28, 2006, 10:42:30 AM »

haha, lazy to elaborate further lah on my above posting. Actually I was thinking that it is not only size that matter. LIke Grexer said, it has other factors too, like motor, and also box play an important role.

craziechild · « **Reply #11 on:** November 28, 2006, 11:17:18 AM »

i am into SQ... loudness is not a concern but some of my experience is tht 12" sometimes is not loud enough for me... but in order to save space i dun wan to put in two 12" as it takes more space than a single 15"... the sub i am using now is helix deep blue 12 pairing with helix H400. box is sealed 1.2cuft.

i am dun wan to change my amp as it will take up more of my budget... budget wise is below RM800 excluding the box.

the music i play is vocalist, audiophile and RnB... the problem persist when i am listening to RnB...

hopefully all the sifu can help me... and one thing i found out also is 15" sub is very limited in the market... not much affordable brands tht i know produce them... so i thing tht would be a problem too...

cheers...

llsaw · « **Reply #12 on:** November 28, 2006, 11:24:36 AM »

Loud + SQ + Cheap do not come hand in hand. The subwoofer is only but one part of the equation. You will need an amp powerful enough to play it loudly without clipping and with the desired SQ and damping factor.

Audiophiliac · « **Reply #13 on:** November 28, 2006, 11:41:18 AM »

how loud do want it to be ?

craziechild · « **Reply #14 on:** November 28, 2006, 12:49:54 PM »

Quote

Loud + SQ + Cheap do not come hand in hand

figure this out too... guess i might hav to wait for a few more months to change my sub... or strike 4d...

question bout how loud... i think i this one is very hard to describe here... well... do you all think tht changing the box help much? changing to a ported box... will it help on the problem bout loudness? what bout low Hz? scared tht i can achive the loudness but losing the low end...

thanks again...

wengweng · « **Reply #15 on:** November 28, 2006, 01:33:56 PM »

For me, if you are into SQ, most music and songs are sufficient with just 1 sub. Even a 8" is enough for me in Dr's car. Maybe you are a born basshead deep down....hehehe

Zenn · « **Reply #16 on:** November 28, 2006, 02:28:11 PM »

id prefer u get a more powerful amp, and a larger sealed box for the sub to go lower. failing that only change sub, hehe...its entry level anyway..

id love to use 15, but u also need a larger box and then it wont be practical oledi. also larger subs tend to be slower and cant keep up with the fronts. unless u have dedicated midbass drivers in front, then it wouldnt be so bad.

craziechild · « **Reply #17 on:** November 28, 2006, 07:13:38 PM »

thanks for all your input... guess i will be keeping money for a amp and sub change since 15" is not recommended...

appleyard · « **Reply #18 on:** November 29, 2006, 10:20:18 AM »

Well the 12" VS 15" subs again.

Well how do I put this.... a 12" may play low freq. with the 15".. but with less SPL. The reason of why ppl claim the 12" cannot play as low as the 15" is that with less SPL you hardly feel the low end extension. A 15" btw can reproduce low freq. with less xmax and more SPL (as you know, lower freq. needs larger cone area given the same SPL).

Now comes with your enclosure. You want the sub to play low freq. and louder, but built a small sealed for it. Remember the Hoffman Iron Law? Again, sealing the enclosures is only using half of the subs potential. You want to go low and loud, go ported. If you have limited power but you may have extra space in oyur car, make the enclosure bigger and port it. It pays to increase efficiency.

Cheers

craziechild · « **Reply #19 on:** November 29, 2006, 04:54:31 PM »

apple, do you think tht the my 1.2cuft is too big? i hav a space issue here so wouldnt wan to built a super big enclosure for the sub...

appleyard · « **Reply #20 on:** November 30, 2006, 10:03:10 AM »

Quote from: craziechild on November 29, 2006, 04:54:31 PM

apple, do you think tht the my 1.2cuft is too big? i hav a space issue here so wouldnt wan to built a super big enclosure for the sub...

bro

Not too sure. Too big or too small is depends on the Q allignment of the sub. For small sealed will be boomy on the high and lacking on the lows. Maybe thats why you feel lacking on the low freq. Try to modelled your sub in WinISD and see the Q allignment and the freq. response whether it has peaks.

craziechild · « **Reply #21 on:** November 30, 2006, 04:26:58 PM »

thanks for the info, sir...