JL Audio Subs

[RLA]

This one would be ok for a 12" woofer in a resonable size room. It has many of the features you are looking for including auto On/Off <--- This feature is often overlooked but handy to have
http://www.rbhsound.com/sa400.shtml

 

[Privateer]

Well I dont think he has any idea of what he's talking about then, he needs to go to a SPL Drag for car audio, go see what a DIY setup can accomplish, in escence its the same thing, a sub (ok, multiple subs, depends how crazy ya wanna go) a home made box and an amplifier or 2 or 3 or 4, a little ingenuity, and some elbow grease to do it. I had 3 10" Orion Subs in my car, 1000 watta mono amps to each one and shattered my front window, thats what a DIY project can do, but nope can't compete with a manufactured product.

Once again QUALITY goes out the "window", there is more to bass then shear SPL. I never said you can not make a DIY sub but what I am saying is that you can not make a DIY sub that will compete with the higher end manufacturers such as a JL gotham.

 

[Privateer]

Distortion (THD): <.03% @ 1 Watt

RLA what would be the THD at 400 watts?

 

[Privateer]

The DD18 has the same DIGITAL lightweight amp as the HGS10. Yes, the Velodyne 10" sub. It's most likely a $300 class D amp.

I highly doubt that.

 

[WmAx]

what I am saying is that you can not make a DIY sub that will compete with the higher end manufacturers such as a JL gotham.

What technical reasoning do you base this upon? Is the JL Gotham or the Velodyne DD 18 magical? What is the factor that prevents a high quality DIY sub from being built by an individual? Based on your certainty, you must know what technical limitations prevent a DIYer from acheiving a very high quality subwoofer design, so please share this information, so that DIYers realize it's a futile effort.

-Chris

 

[Privateer]

What technical reasoning do you base this upon? Is the JL Gotham or the Velodyne DD 18 magical? What is the factor that prevents a high quality DIY sub from being built by an individual? Based on your certainty, you must know what technical limitations prevent a DIYer from acheiving a very high quality subwoofer design, so please share this information, so that DIYers realize it's a futile effort.

If you copied the design 100% exact then you could, that is also if you could buy all the parts needed to complete the project. So first thing you would have to do is buy a JL gotham and then proceed to take it apart to see what the product is made up of. You would have to measure every part on the product so you would know what to use. If you could do that then how long would it take you to purchase everything needed and construct a replica? In the end the amount of time that you would spend would it not be worth it just to buy the product in the first place?

 

[WmAx]

If you copied the design 100% exact then you could, that is also if you could buy all the parts needed to complete the project. So first thing you would have to do is buy a JL gotham and then proceed to take it apart to see what the product is made up of. You would have to measure every part on the product so you would know what to use. If you could do that then how long would it take you to purchase everything needed and construct a replica? In the end the amount of time that you would spend would it not be worth it just to buy the product in the first place?

\

Are you implicating that only 'manufacturers' have some secret bit of knowledge that allows only them to make high quality subwoofers?

-Chris

 

[Spiffyfast]

LOL. My side hurts. What was your final spl rating? Although that's impressive at competitions, it doesn't do much for your inner ear or ability to enjoy music in the later years of life. I can't hear much past 16kHz because of my younger stupidity at frat parties, and love of bass in cars.

Don't remeber what I was able to hit with that one, it was my first system it was pretty loud, every once and awhile I'd set off a car alarm going through a parking lot. I hit 138 db with 4 JL 12W3's in my Eclipse I used to have all those noise pollution tickets used to suck, glad I dont deal with that anymore. And I know how you feel about the hearing thing, I'm getting pretty bad myself and I'm still enjoying my stupidity at frat parties so I guess it'll only get worse....oh well, its fun now.

 

[Privateer]

Are you implicating that only 'manufacturers' have some secret bit of knowledge that allows only them to make high quality subwoofers?

They build them and fine tune there products to sound a certain way, if you change something from the original design then it is going to sound and perform different. Plus if you use something that is "cheaper" than what is in the design it will perform in a negative way.

 

[Privateer]

I hit 138 db with 4 JL 12W3's in my Eclipse

I hope you had hearing protection.

 

[Spiffyfast]

They build them and fine tune there products to sound a certain way, if you change something from the original design then it is going to sound and perform different. Plus if you use something that is "cheaper" than what is in the design it will perform in a negative way.

Just b/c something is less expensive doesn't really mean its of lesser quality, with the right parts and know how it would be perfectly possible to build a sub to preform with the JL home theater subs, and if you could do all the work urself it would cost less than just buying one of those (theres a lot u can buy that would total up to less than 2400), there might be alot of time and effort involved but theres no reason that its not possible thats all we're trying to get at. And about the 138 db's, I wasnt in the car just the testing equipment, never played it that loud when I'd just drive around

 

[WmAx]

They build them and fine tune there products to sound a certain way, if you change something from the original design then it is going to sound and perform different. Plus if you use something that is "cheaper" than what is in the design it will perform in a negative way.

Now you are changing your tune from DIY quality to making a point of exact replication of a product. There is no need to copy a commercial product exactly, in order to achieve very high quality. So far as 'cheaper' parts, I don't think you have a concept of what does or does not matter, or which parameters are relevant in making such a judgement call. You have not offered a single technical point in reference to your claim[DIY must be inferior to a retail product] as of yet. Re: Price: price is not an accurate indicator of sound quality, and the manufacturers don't have an exclusive knowledge that allows only them to make high quality products. You can increase the quality of many products by designing and building the devices yourself[if you have that knowledge]. In fact, you can make better products, since you can customize the items to more precisely fit your specific uses/applications, which would not be possible with a pre-fabricated commercial product.

-Chris

 

[Privateer]

if you have that knowledge

So you are saying that your knowledge is greater then the entire design team that worked on the JL sub design?

Now you are changing your tune from DIY quality to making a point of exact replication of a product.

That is if you can buy all the parts.

So far as 'cheaper' parts, I don't think you have a concept of what does or does not matter, or which parameters are relevant in making such a judgement call.

Because all that stuff that goes into my Mcintosh amp is just there for weight.

Price: price is not an accurate indicator of sound quality, and the manufacturers don't have an exclusive knowledge that allows only them to make high quality products.

So they just charge whatever they want fully aware that there product is the same as a $200 sub from walmart?

Just b/c something is less expensive doesn't really mean its of lesser quality

No, it just happens 99.99% of the time.



I think most people on this forum need to visit a high end store so they can hear the difference and how much better it can get.

 

[WmAx]

So you are saying that your knowledge is greater then the entire design team that worked on the JL sub design?

Red herring. I never claimed any such thing. I might not even know how to hook up a cd player to an amp. It would not matter, since I am not the subject here. You still refuse[because you apparently can't] to give any technical reason(s) why a DIY sub must be inferior to a retail product.

Because all that stuff that goes into my Mcintosh amp is just there for weight.

Another distractor, in order to avoid giving any technical reasons as to why a DIY sub can not be of superb quality?

So they just charge whatever they want fully aware that there product is the same as a $200 sub from walmart?

Who said anything about a $200 sub from Wal-Mart? Another red herring.

No, it just happens 99.99% of the time.

Where do you get your statistic? What[parameters] is it based upon?

-Chris

 

[Spiffyfast]

lol, u two are rediculous, just agree to disagree, ur both going to argue ur own way and not listen to the other one at all no matter which one of you is right. I just started this post becasue I was a fan of JL and thought they would probably be incredible subs and wanted more people to see them. Maybe someone will now go build a DIY sub using JL's for the loud speaker and a good sub amp b/c they are out there. Who knows, it may blow away a manufactured sub of the same price or it may not, its just pointless for you two to argue about something so trivial

 

[Privateer]

WmAx

This is why I do not argue with you moronic DIY'ers. On the DIY market you can not buy the same materials that go into a high end product. You do not even know if JL will sell there driver separate so how can you say anything about equaling its performance? We have no data on this JL sub or any of the internals (the amp being the main point) yet you BRAG about being able to match it in every way for a fraction of the price? I think you people really need to get a better job in order to afford some quality products so you can leave this rut were main stream electronics are best and DIY'ers can best a martin logan statement system.


Show me some link to your supply web site were you can buy any part for any product, or show me some links to your wonderful DIY projects that out class the rest of the audio world.

 

[WmAx]

lol, u two are rediculous, just agree to disagree, ur both going to argue ur own way and not listen to the other one at all no matter which one of you is right.

If the other poster could substantiate[give real and verifiable technical reasons] as to why a DIY sub must be inferior to a retail product, then I would cease the antagony. But here is the deal: if you stand back and let misinformation propogate freely, you reduce the quality of the information overall. Before you know it, the amount of garbage posts increase dramatically(refer to audioreview.com, audioasylum.com, head-fi.org for examples of such phenomena), thus decreasing the value of the forum. This annoying[yes, I admit it's redundant and annoying] exchange is required to set things into perspective.

-Chris

 

[Buckeyefan 1]

Show me some link to your supply web site were you can buy any part for any product

www.madisound.com

 

[Spiffyfast]

This is why I do not argue with you moronic DIY'ers. On the DIY market you can not buy the same materials that go into a high end product.Show me some link to your supply web site were you can buy any part for any product.

Dont really wanna start an argument b/c I'm still new to this HT world and alot of ppl on here know alot more than me about the subject, but..... alot of people would argue that SVS offers some top quality subs and here's the links you wanted

http://www.svsubwoofers.com/parts.htm subs and a plate amp

http://www.svsubwoofers.com/ampeq.htm amps and EQ's

something tells me I could build a serious sub with some of those parts

 

[Privateer]

If the other poster could substantiate[give real and verifiable technical reasons] as to why a DIY sub must be inferior to a retail product, then I would cease the antagony.

As I said post a link to this ultimate DIY sub so I can look it over.