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Old 12-18-2009, 02:39 PM
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BA G5 Subs

Hey guys i have some dvc 12 Boston's g5 series i have them in a homemade nice box i made. its 1.05 cubic ft per chamber and its sealed. i have it running on a hifonics brutus 1600 watt rms amp. with a kenwood hd headunit. question is lol how can i get it louder? it allready will flex the top of my wj pretty good an di have plenty of power to play with gain is about half way. no distortion coming from them very clean bass just want more lol would a ported box suit me better?
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Old 12-18-2009, 02:55 PM
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Re: BA G5 Subs

Do you know what they are wired too? I'm assuming you have them down to 1 or 2 ohms. Just want to make sure they aren't wired to like 8 or 16 ohms.

Anyway, a ported enclosure gives you the ability to really change the frequency response that they'll reproduce.

Take a loot at this plot below;








Your current setup is probably very close to the purple line (sealed plot)

The green line is an example of a low-extending flat response (vented plot)

The yellow line is an example of a peaking response (vented plot)


You can see that you have a lot of control over the sound of a sub woofer when using a vented enclosure.

So to answer your question, yes, a ported enclosure can yield you a "louder" sound.
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Old 12-18-2009, 05:24 PM
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Re: BA G5 Subs

yes i have them wired down to 2 ohm a peice so wouldnt that make a 1 ohm on the amp?? so what do you think or know would be a good sounding bass nice pound nice all around bass just something that makes theses subs stand out like wow. everyone that has heard my system loves it its almost all BA. i just think its time too do something else lol so i am getting ideas.
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Old 12-18-2009, 07:44 PM
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Re: BA G5 Subs

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Originally Posted by josef15111 View Post
yes i have them wired down to 2 ohm a peice so wouldnt that make a 1 ohm on the amp?? so what do you think or know would be a good sounding bass nice pound nice all around bass just something that makes theses subs stand out like wow. everyone that has heard my system loves it its almost all BA. i just think its time too do something else lol so i am getting ideas.
Well, they could either be at 1 ohm or 4 ohm. If your amp is stable down to 1 ohm (and I think most Hifonics are), you may want to be sure that they are indeed wired to 1 ohm. Be sure to re-adjust your gain though.

Post up the t/s parameters for the sub you have. I'll run them in that program and see what enclosures model up well.
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Old 12-20-2009, 10:24 PM
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Re: BA G5 Subs

hey man i found this for the G5 1244 the ones i have i am rather interested in what this program is gunna tell you let me know when ya do it and will this program give you box dimenssions??


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Old 12-20-2009, 10:42 PM
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Re: BA G5 Subs

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Originally Posted by josef15111 View Post
hey man i found this for the G5 1244 the ones i have i am rather interested in what this program is gunna tell you let me know when ya do it and will this program give you box dimenssions??
The program I use is called WinISD Beta - Google it, it's a free download.





In yellow is the enclosure you currently are using

In green is the perfect vented enclosure for your subs - at 8+ cubic feet, that's a bit much

In pink is a more reasonable plot at 4 cubic feet. And it gives you a peak for a louder response at those frequencies.



** I circled enclosure size and tuning, and if it is a sealed or vented alignment.
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Old 12-20-2009, 11:06 PM
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Re: BA G5 Subs

you dont have any programs to build out a box with do you or maybe know the name of a nice program that will let u do this?? i know they make them but i dont have much luck in finding them. any help would be kool.. thanks much



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Old 12-20-2009, 11:13 PM
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Re: BA G5 Subs

Quote:
Originally Posted by josef15111 View Post
you dont have any programs to build out a box with do you or maybe know the name of a nice program that will let u do this?? i know they make them but i dont have much luck in finding them. any help would be kool.. thanks much



Joe
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Like dimensions...? Nah, I've always just figured out my limits (i.e. length (fender to fender), height, and then added what I needed to my depth to get an enclosure that occupied the space I had to work with.

Actually, here is one to figure out slot port designs... in my opinion, a slot port is kinda ugly. I'd opt for a round port (flared).

http://www.reaudio.com/speaker_box/LPort_Box_Calc.html
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Old 12-21-2009, 10:14 PM
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Re: BA G5 Subs

hey i was trying to figure something out... the cubic ft that is listed is that per chamber or total box? i know the speakers say they are designed for small sealed encloseres and i have also heard from people that putting them in a bigger sealed box makes them really come alive. any thoughts on this?
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Old 12-21-2009, 10:25 PM
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Re: BA G5 Subs

Quote:
Originally Posted by josef15111 View Post
hey i was trying to figure something out... the cubic ft that is listed is that per chamber or total box?
This is total (net) volume. So it would need to be slightly larger to account for magnet displacement and port displacement.

The woofers would share a common chamber if they are in a ported enclosure.

Quote:
Originally Posted by josef15111 View Post
i know the speakers say they are designed for small sealed encloseres and i have also heard from people that putting them in a bigger sealed box makes them really come alive. any thoughts on this?
It depends on what they meant by "alive." You can see in the plots above that in a larger (whether ported or sealed) enclosure, they dig deeper - get lower. This is usually at the cost of impact at slightly higher frequencies.

If you are looking to get more response at lower frequencies, then a larger, ported enclosure is the way to achieve that.
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