I was in Radio Shack and I saw 4" woofer just sitting on the shelf. It caught my eye, and I meandered over to it. I read that it featured a frequency response down to 80 Hz, and had a polypropylene cone. I also liked its nice fairly large-rolled surround. On an impulse, I bought it. (maybe one of these days I'll grow out of that.)
Now I have to do something with it. I have considered experimenting with Isaac's Subwoofer Simulator program, which has the capability to design 8th-order Bandpass enclosures. Now, I haven't heard of anyone actually building one of these things, so this is kind of an experiment. What I want to know is if Bose lawyers are going to come and knock down my door, beat up my parents, shoot my dog, and drag me out into the street to be run over by a Lincoln Town Car several times if I build one of these.
Given the sudden spike in interest in the 6th-order Bandpass enclosure on these forums, I was thinking about maybe trying this out, just for grins (the woofer was $9) and maybe hooking them up to some computer speakers with a sub-out. My roommate here likes to listen to a lot of hip-hop but right now he's limited to the speakers on his Dell Laptop (need I say more?) so I might let him hook the system up to his laptop.
Now I have to do something with it. I have considered experimenting with Isaac's Subwoofer Simulator program, which has the capability to design 8th-order Bandpass enclosures. Now, I haven't heard of anyone actually building one of these things, so this is kind of an experiment. What I want to know is if Bose lawyers are going to come and knock down my door, beat up my parents, shoot my dog, and drag me out into the street to be run over by a Lincoln Town Car several times if I build one of these.
Given the sudden spike in interest in the 6th-order Bandpass enclosure on these forums, I was thinking about maybe trying this out, just for grins (the woofer was $9) and maybe hooking them up to some computer speakers with a sub-out. My roommate here likes to listen to a lot of hip-hop but right now he's limited to the speakers on his Dell Laptop (need I say more?) so I might let him hook the system up to his laptop.
me thinks you are safe from Bose and co. as far as laptops go keep that driver 12"+ away from the laptop unless you wanna fry the HD. what are the T/S on teh woofer. 6th order BP prefers a low Qts.
Yeah, that is a good question. I guess I cannot give a definitive answer to it.
All I can say is that there is a lot of more questionable stuff in electronics magazines, (Build Your Own Descrambler), than this. The magazine articles carry the usual disclaimers, ("we do not encourge anyone to break the law, this article is for research purposes only"), etc.
Basically, I think anyone is pretty safe if they are going to just build one of these things for personal use. That seems to be the conventional wisdom. Now if you build a few informally for a few friends who pay you a few bucks, I guess you are theoretically breaking the law-but how the heck can Bose actually find out?
My guess is that Bose will only make the effort to go after someone who takes their ideas and makes an actual production run of several hundred pieces or more, and who deals with audio retail stores or a sophisticated internet website. In other words, somebody in full time business selling these things. I really don't see how they would waste their time going after individuals who like to putter around down their basement.
All I can say is that there is a lot of more questionable stuff in electronics magazines, (Build Your Own Descrambler), than this. The magazine articles carry the usual disclaimers, ("we do not encourge anyone to break the law, this article is for research purposes only"), etc.
Basically, I think anyone is pretty safe if they are going to just build one of these things for personal use. That seems to be the conventional wisdom. Now if you build a few informally for a few friends who pay you a few bucks, I guess you are theoretically breaking the law-but how the heck can Bose actually find out?
My guess is that Bose will only make the effort to go after someone who takes their ideas and makes an actual production run of several hundred pieces or more, and who deals with audio retail stores or a sophisticated internet website. In other words, somebody in full time business selling these things. I really don't see how they would waste their time going after individuals who like to putter around down their basement.
exuse my cynicism and ignorance
Bose has actually developed something that an audiophile might like?
I thought those guys were all about colouration.
I must admit I don't know what an 8th order bandpass enclosure is.
Chris
Bose has actually developed something that an audiophile might like?
I thought those guys were all about colouration.
I must admit I don't know what an 8th order bandpass enclosure is.
Chris
Actually, the 8th-order bandpass is not something an Audiophile would like. It is more of an acoustic trick than anything else because it is designed to get huge amounts of output from small woofers while sacrificing definition, speed, and musicality. It is just that no one has built one yet that I have heard of so I want to try it out and see what happens. The woofer itself is quite crappy, with extension only down to 85 Hz, so its use is limited to a multimedia sub of some sort. The only thing is that the T/S parameters that Radio Shack provides are too sketchy for Isaac's Subwoofer Simulator to work. Darn.
Here is an illustration of an 8 th order bandpass box taken from Isaac's, (F4ier's), website.
Subwoofer Simulator, available at the link below, models this. Do not be put off by the number of curves in the screenshot. All curves can be enabled or disabled. You can model twenty different curbves at once, (SPL, impedance phase, cone excursion, etc.), or just one curve, if you wish.
http://www.geocities.com/f4ier/speaker.htm
Subwoofer Simulator, available at the link below, models this. Do not be put off by the number of curves in the screenshot. All curves can be enabled or disabled. You can model twenty different curbves at once, (SPL, impedance phase, cone excursion, etc.), or just one curve, if you wish.
http://www.geocities.com/f4ier/speaker.htm
Attachments
- Status
- Not open for further replies.