Subwoofer setups
08-13-02, 11:21 PM
#2
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Yeah, There are a few types of bandpass boxes. They take up a bit more room, but they are very LOUD. They are not that accurate; by this I mean that they amplify certain frequencies (whatever you tune your box for (for example 100 hertz)) at higher decibels. Basically, if you want acurate tight bass, go with a sealed box. If you like it louder and more boomy, go with a bandpass. It also depends on what subwoofer you buy because some do not work well in bandpass enclosures.
08-15-02, 02:57 PM
#3
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sealed is the way to go if your looking for SQ. Most SPL setups are bandpass. I prefer the sound of a sealed box but it may be because I prefer nice clean bass and overall sound. There are also different types of boxes such as isobaric chambers, compression, passive etc... that you might also want to explore
08-15-02, 08:27 PM
#4
Former Moderator. RIP Icemark.
Wolf50000 is only half right. He is correct on 7th order bandpass enclosures, but not 5th order. 7th order (with both enclosures vented/ported) do tend to sound "boomy" while 5th order can be tuned to sound deep and accurate.
Both however require someone with computer modeling or a decent box program and better than average construction/wood working skills. Band pass enclosures just copied from a magazine or designed "by hand" do sound very boomy and not very accurate.
A 5th order bandpass uses a sealed enclosure and a ported enclosure, which allows both deep and tight base. For automotive applications with limited power it is by far the best choice.
If you have unlimited power, then a conventional sealed enclosure will give you the best idiot proof stereo and if properly designed will help prevent the idiot factor of over cranking the system. The draw back is of course the high demands on construction quality and power requirements to make the system sound moderately loud.
Both however require someone with computer modeling or a decent box program and better than average construction/wood working skills. Band pass enclosures just copied from a magazine or designed "by hand" do sound very boomy and not very accurate.
A 5th order bandpass uses a sealed enclosure and a ported enclosure, which allows both deep and tight base. For automotive applications with limited power it is by far the best choice.
If you have unlimited power, then a conventional sealed enclosure will give you the best idiot proof stereo and if properly designed will help prevent the idiot factor of over cranking the system. The draw back is of course the high demands on construction quality and power requirements to make the system sound moderately loud.
08-16-02, 06:43 PM
#5
Originally posted by Icemark
Wolf50000 is only half right. He is correct on 7th order bandpass enclosures, but not 5th order. 7th order (with both enclosures vented/ported) do tend to sound "boomy" while 5th order can be tuned to sound deep and accurate.
Both however require someone with computer modeling or a decent box program and better than average construction/wood working skills. Band pass enclosures just copied from a magazine or designed "by hand" do sound very boomy and not very accurate.
A 5th order bandpass uses a sealed enclosure and a ported enclosure, which allows both deep and tight base. For automotive applications with limited power it is by far the best choice.
If you have unlimited power, then a conventional sealed enclosure will give you the best idiot proof stereo and if properly designed will help prevent the idiot factor of over cranking the system. The draw back is of course the high demands on construction quality and power requirements to make the system sound moderately loud.
Wolf50000 is only half right. He is correct on 7th order bandpass enclosures, but not 5th order. 7th order (with both enclosures vented/ported) do tend to sound "boomy" while 5th order can be tuned to sound deep and accurate.
Both however require someone with computer modeling or a decent box program and better than average construction/wood working skills. Band pass enclosures just copied from a magazine or designed "by hand" do sound very boomy and not very accurate.
A 5th order bandpass uses a sealed enclosure and a ported enclosure, which allows both deep and tight base. For automotive applications with limited power it is by far the best choice.
If you have unlimited power, then a conventional sealed enclosure will give you the best idiot proof stereo and if properly designed will help prevent the idiot factor of over cranking the system. The draw back is of course the high demands on construction quality and power requirements to make the system sound moderately loud.
A 5th order as you call it is a single reflex bandpass
A 7th order as you call it is a dual reflex bandpass
I remember reading a Rockford Fosgate technical manual in the early 90's saying you can add roll off (orders) from a cross over device with natural roll off from an enclosure. I TOTALLY disagree with this... But anyways...
I and my professional experience totally agree with you on the sealed box thing... Stick with a sealed box unless you throughly understand how to build/calculate a box
Last edited by MIKE-P-28; 08-16-02 at 06:46 PM.
08-16-02, 07:05 PM
#6
Former Moderator. RIP Icemark.
Originally posted by MIKE-P-28
Depends on where you learned your terminology on speaker design, orders are another way of telling roll off..
A 5th order as you call it is a single reflex bandpass
A 7th order as you call it is a dual reflex bandpass
Depends on where you learned your terminology on speaker design, orders are another way of telling roll off..
A 5th order as you call it is a single reflex bandpass
A 7th order as you call it is a dual reflex bandpass
And you are quite right in reminding me that there are orders related to speaker/cross over rolloff as well as enclosure design.
08-18-02, 10:32 PM
#7
Yeah what was it a sealed both and a -12db x-over (coil and a cap) would equal a 5th order LOL
We argued that so many times at seminars, I was sick of it... Some say you could some say you couldnt.. But I got really noticed at a JL technical seminar when I was napping and I got called on, I said give me a calcualtor 1 minute later I had the -3db and tuning frequency, vent diameter and lenth and I was within 1% LOL I was told to go back to sleep now LOL
We argued that so many times at seminars, I was sick of it... Some say you could some say you couldnt.. But I got really noticed at a JL technical seminar when I was napping and I got called on, I said give me a calcualtor 1 minute later I had the -3db and tuning frequency, vent diameter and lenth and I was within 1% LOL I was told to go back to sleep now
LOL
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