Hey guys,
I'm slowly but surely getting my boxes built for my Infinity perfect 10.1 subs.
I'm going with seperate boxes on opposite sides of my truck. I was going to go with sealed boxes after LOTS of consideration. I like accurate base with a full range of hz. and overall I'm going for sound quality, but I also like deep pounding bass.
Just wondering if having one sealed box (.60cu ft) and one ported box (1.0cu ft) would sound worse than two of one kind.
I was thinking the sealed sub would produce the notes that the ported box isn't tuned for, and the ported box would make a small range of bass a little louder...
Would this work, or would sound waves collide and make the sound quality go down hill??
Thanks,
Replies (15)
ttocs on 03/22/2005 13:13:01
if you have subs tuned to different frequencies(what the box does) you can have cancellation effects, and could loose sound on some freqs...
Needasystem on 03/22/2005 14:08:13
I've got my single infinity kappa perfect 12.1d in a sealed box, Its not in my car yet, I've just had the chance to test it out on my home system (and almost blew the amp in my house out in the process, that thing cant handle 2ohms) and I think it sounds real nice, and I'm not even completely finished with the box (little bit more caulking left, and i need to polyfill the inside)
One thing I have noticed (may just be the fact that its not airtight yet) is that when I really crank it up, I can hear the cone rattling, like its moving too far and hitting the inside of the sub. I'm not sure if thats even possible, but it is something I have noticed and was wondering about.
MrBrownstone on 03/22/2005 16:24:31
One sealed, one ported? 1 box 1.25 cu ft, the other 1.75 cu ft. Kinda like having 2 different sized boobs!!! Could finish 1st & 3rd in the same wet t-shirt contest.
-Larry the Cable Guy
:-)
Stick with both of one or the other. Compromise? Tune the vented enclosure to 32Hz or something deep like that. The venting will have little effect to midbass, but about 45 HZ, quite a lump.
Lump, boobs...I like the connection :-)
ttocs on 03/22/2005 17:26:12
sounds like you didn't use a table saw to cut the wood. IF the box pieces are not cut straight you cannot put enough calk in it to seal it.
As an fyi, home depot will cut wood to the size you want for fifty cents a cut.
Needasystem on 03/22/2005 17:59:05
nah, i got the thing all airtight, I think its just the amp (running it off a home amp right now *car amp comes tomorro* and I had the bass cranked up more than the amp can handle..that, and it isnt 2ohm stable, if i turn it up alot and the bass hits real hard it just shuts off, lol.(ok, thats actually probably pretty bad for the amp, maybe i shouldnt be laughing, but the amp is older than I am, soo...) and i actually did have the boards cut for me (local store, Jerry's Home Improvement, the guy didnt charge me because he messed up one of the pieces and had to re-cut (not like I cared, I bought a 4x8 sheet and only needed about 4x3)
swez on 03/22/2005 19:45:24
Sure, you can do that. We use that concept in Pro Audio all the time w/o problems. One chamber sealed for tight, punch bass. The other is ported low for deep low bass performance. Just note that many 10's cannot go lower than rated specs. A SS filter is recommended as well to protect your ported sub from destruction.
Swez
Victor on 03/22/2005 23:06:59
I agree, My girlfriend can give me the fun of a petite virgin with cute little boob, and an experienced slut with those 36DD's at the same time.....hehehehe....
You can do it, there wont be cancellation issues but only reinforcement issues, where some frequencies will overlap and be reinforced to sound louder than the others..
Victor...
alanjlamore on 03/23/2005 08:27:11
I'm going to be getting an amp with a ss filter, but I'm not sure if I should use it because it will be filtering both subs (they'll be wired in parallel).
Can a ss filter be hooked up to the wires just before the one ported sub, or maybe it wouldn't matter that much if both subs are filtered?
I'm thinking about filtering out, and porting somewhere around 30hz-35hz.
swez on 03/23/2005 09:26:00
It will be fine to power both subs with the SS filter on. The sealed sub has a natural rolloff below ~40 Hz. But the port tuned sub has to be protected. The 30-35 Hz range for your SS filter is a good place to be if your PTF is say `36 Hz.
Swez
TalonTSI91 on 04/8/2005 23:50:58
Ok question here ported subs and the SS filter ok not sure what an SS filter is is it built in the amp? and also how do you tune the ports and why do they need protected and not the sealed one? i mean i don't mess with ported boxes but the next thing i wanted to do i wanted 2 sealed and 2 ported so i'm kinda curious
swez on 04/9/2005 01:11:11
Oh brother, where do these guys come from? This is not a soft porn site.
Anyway, sealed boxes can do good lows and tight bass well. They also can handle a bit more power than the same sub in a ported enclosure. The trick is, know the specs of the sub to be used and mfg's airespace recommendations. Larger boxes generally net more deep bass. Smaller ones, net a tight, fast bass response. No SSF is required here. The box design naturally rolls off deep bass below ~40 Hz.
Ported subs can go lower and have a bit more efficiency in a well designed enclosure. Takes less power to get the bump, but we sacrifice that tight bass punch available in sealed boxes.
The SubSonic Filter (SSF) is recomended for a sub that is port tuned box. Why? We want to protect the woofer from audio signals below the tuning frequency of the box. Most SQ guys will pick a tuning freq of about 32-38 Hz. SPL guys will generally go above 40 Hz to get max bump (SPL) wise, close to the resonant freq of the vehicle they are tweaking. Either way, the SSF should be matched to the port freq to prevent excess heat, cone instability and damage to the sub(s).
These are very general guidelines. If you desire more details on pros & cons of any given box design, we have a few good reads in the DIY section of this forum.
Swez
TalonTSI91 on 04/9/2005 02:09:41
Ok and one last question is a band pass box any better than just ported because i have an Audiobahn sound Q 12 in a sealed box built to specs but a friend bought a cheap band pass and is pushing about 300 watts less and gets more sound no where near as tight as mine but i'd still like to know whats up with the bandpass
swez on 04/9/2005 10:32:09
Bandpass boxes are very efficient w/ SPL applications. Some call them "One Note Wonders" . A well deserved name too. They are very good at putting out high SPL in a narrow band of freqs, but overall SQ is not there. Personally, most guys with BP boxes either don't know what they are doing to their subs or are in SPL Comps and know exactly where to tune them to win.
If you want well defined, tight and punchy bass, go sealed for best SQ applications. A well matched sub & ported design will give more low end bump and give a good blend of SQ and SPL. BP is strickly for SPL. Bass is not well defined, adds a distinct "coloring" to the bass freqs and if you get it wrong, can blow a sub without knowing the sub is being stressed.
Swez
cplkittle on 04/9/2005 12:28:21
I have always read that bandpass boxes take up alot of space, this is true... but then you see the smaller prefab boxes at circuit city that are bandpass, and you think.. this is no larger than the ported box I had in my other car..
The difference is professional v/s prefab. It took me over a year and almost a dozen enclosures to find out that a good bandpass box is huge. I am lucky enough to work at a place that allows me to build these enclosures, test them in my vehicle, then put them on display in the store. I have one now that I am happy with. Its overall internal volume is a little over 6 cubic fr.
TalonTSI91 on 04/9/2005 13:18:45
Wow interesting well either way i don't think i'll be going with the BP boxes i'm out for the crisp clean punch i get with the sealed and maybe after i get another sub or 2 i will go 2 sealed 2 ported for a nice mix of everything
I'm slowly but surely getting my boxes built for my Infinity perfect 10.1 subs.
I'm going with seperate boxes on opposite sides of my truck. I was going to go with sealed boxes after LOTS of consideration. I like accurate base with a full range of hz. and overall I'm going for sound quality, but I also like deep pounding bass.
Just wondering if having one sealed box (.60cu ft) and one ported box (1.0cu ft) would sound worse than two of one kind.
I was thinking the sealed sub would produce the notes that the ported box isn't tuned for, and the ported box would make a small range of bass a little louder...
Would this work, or would sound waves collide and make the sound quality go down hill??
Thanks,
Replies (15)
ttocs on 03/22/2005 13:13:01
if you have subs tuned to different frequencies(what the box does) you can have cancellation effects, and could loose sound on some freqs...
Needasystem on 03/22/2005 14:08:13
I've got my single infinity kappa perfect 12.1d in a sealed box, Its not in my car yet, I've just had the chance to test it out on my home system (and almost blew the amp in my house out in the process, that thing cant handle 2ohms) and I think it sounds real nice, and I'm not even completely finished with the box (little bit more caulking left, and i need to polyfill the inside)
One thing I have noticed (may just be the fact that its not airtight yet) is that when I really crank it up, I can hear the cone rattling, like its moving too far and hitting the inside of the sub. I'm not sure if thats even possible, but it is something I have noticed and was wondering about.
MrBrownstone on 03/22/2005 16:24:31
One sealed, one ported? 1 box 1.25 cu ft, the other 1.75 cu ft. Kinda like having 2 different sized boobs!!! Could finish 1st & 3rd in the same wet t-shirt contest.
-Larry the Cable Guy
:-)
Stick with both of one or the other. Compromise? Tune the vented enclosure to 32Hz or something deep like that. The venting will have little effect to midbass, but about 45 HZ, quite a lump.
Lump, boobs...I like the connection :-)
ttocs on 03/22/2005 17:26:12
sounds like you didn't use a table saw to cut the wood. IF the box pieces are not cut straight you cannot put enough calk in it to seal it.
As an fyi, home depot will cut wood to the size you want for fifty cents a cut.
Needasystem on 03/22/2005 17:59:05
nah, i got the thing all airtight, I think its just the amp (running it off a home amp right now *car amp comes tomorro* and I had the bass cranked up more than the amp can handle..that, and it isnt 2ohm stable, if i turn it up alot and the bass hits real hard it just shuts off, lol.(ok, thats actually probably pretty bad for the amp, maybe i shouldnt be laughing, but the amp is older than I am, soo...) and i actually did have the boards cut for me (local store, Jerry's Home Improvement, the guy didnt charge me because he messed up one of the pieces and had to re-cut (not like I cared, I bought a 4x8 sheet and only needed about 4x3)
swez on 03/22/2005 19:45:24
Sure, you can do that. We use that concept in Pro Audio all the time w/o problems. One chamber sealed for tight, punch bass. The other is ported low for deep low bass performance. Just note that many 10's cannot go lower than rated specs. A SS filter is recommended as well to protect your ported sub from destruction.
Swez
Victor on 03/22/2005 23:06:59
I agree, My girlfriend can give me the fun of a petite virgin with cute little boob, and an experienced slut with those 36DD's at the same time.....hehehehe....
You can do it, there wont be cancellation issues but only reinforcement issues, where some frequencies will overlap and be reinforced to sound louder than the others..
Victor...
alanjlamore on 03/23/2005 08:27:11
I'm going to be getting an amp with a ss filter, but I'm not sure if I should use it because it will be filtering both subs (they'll be wired in parallel).
Can a ss filter be hooked up to the wires just before the one ported sub, or maybe it wouldn't matter that much if both subs are filtered?
I'm thinking about filtering out, and porting somewhere around 30hz-35hz.
swez on 03/23/2005 09:26:00
It will be fine to power both subs with the SS filter on. The sealed sub has a natural rolloff below ~40 Hz. But the port tuned sub has to be protected. The 30-35 Hz range for your SS filter is a good place to be if your PTF is say `36 Hz.
Swez
TalonTSI91 on 04/8/2005 23:50:58
Ok question here ported subs and the SS filter ok not sure what an SS filter is is it built in the amp? and also how do you tune the ports and why do they need protected and not the sealed one? i mean i don't mess with ported boxes but the next thing i wanted to do i wanted 2 sealed and 2 ported so i'm kinda curious
swez on 04/9/2005 01:11:11
Oh brother, where do these guys come from? This is not a soft porn site.
Anyway, sealed boxes can do good lows and tight bass well. They also can handle a bit more power than the same sub in a ported enclosure. The trick is, know the specs of the sub to be used and mfg's airespace recommendations. Larger boxes generally net more deep bass. Smaller ones, net a tight, fast bass response. No SSF is required here. The box design naturally rolls off deep bass below ~40 Hz.
Ported subs can go lower and have a bit more efficiency in a well designed enclosure. Takes less power to get the bump, but we sacrifice that tight bass punch available in sealed boxes.
The SubSonic Filter (SSF) is recomended for a sub that is port tuned box. Why? We want to protect the woofer from audio signals below the tuning frequency of the box. Most SQ guys will pick a tuning freq of about 32-38 Hz. SPL guys will generally go above 40 Hz to get max bump (SPL) wise, close to the resonant freq of the vehicle they are tweaking. Either way, the SSF should be matched to the port freq to prevent excess heat, cone instability and damage to the sub(s).
These are very general guidelines. If you desire more details on pros & cons of any given box design, we have a few good reads in the DIY section of this forum.
Swez
TalonTSI91 on 04/9/2005 02:09:41
Ok and one last question is a band pass box any better than just ported because i have an Audiobahn sound Q 12 in a sealed box built to specs but a friend bought a cheap band pass and is pushing about 300 watts less and gets more sound no where near as tight as mine but i'd still like to know whats up with the bandpass
swez on 04/9/2005 10:32:09
Bandpass boxes are very efficient w/ SPL applications. Some call them "One Note Wonders" . A well deserved name too. They are very good at putting out high SPL in a narrow band of freqs, but overall SQ is not there. Personally, most guys with BP boxes either don't know what they are doing to their subs or are in SPL Comps and know exactly where to tune them to win.
If you want well defined, tight and punchy bass, go sealed for best SQ applications. A well matched sub & ported design will give more low end bump and give a good blend of SQ and SPL. BP is strickly for SPL. Bass is not well defined, adds a distinct "coloring" to the bass freqs and if you get it wrong, can blow a sub without knowing the sub is being stressed.
Swez
cplkittle on 04/9/2005 12:28:21
I have always read that bandpass boxes take up alot of space, this is true... but then you see the smaller prefab boxes at circuit city that are bandpass, and you think.. this is no larger than the ported box I had in my other car..
The difference is professional v/s prefab. It took me over a year and almost a dozen enclosures to find out that a good bandpass box is huge. I am lucky enough to work at a place that allows me to build these enclosures, test them in my vehicle, then put them on display in the store. I have one now that I am happy with. Its overall internal volume is a little over 6 cubic fr.
TalonTSI91 on 04/9/2005 13:18:45
Wow interesting well either way i don't think i'll be going with the BP boxes i'm out for the crisp clean punch i get with the sealed and maybe after i get another sub or 2 i will go 2 sealed 2 ported for a nice mix of everything
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