Welcome, Guest. Please Login or Register
Decware Audio Forums
08/27/14 at 20:04:23


Pages: 1 ... 17 18 19 20 
Send Topic Print
hz numbers on a 15" 2 driver (Read 38715 times)
Bob in St. Louis
Ex Member



Re: hz numbers on a 15" 2 driver
Reply #270 - 06/22/06 at 13:07:32
 
John, I saw your post on AC about the remote, but the thread is locked. ?

Try here...

http://www.remotecentral.com/

Bob

p.s. They've also got (buried in the site, somewhere) a nice section where people post the "cool" scenes of a movie, ie.. super low LFE, exceptional surround track, good examples of surround, ect.ect...
Kind of like the SVS site has a list of movies with super low LFE's.   Cheesy

Actually here's the specific forum for HTPC and general PC remotes.

http://www.remotecentral.com/cgi-bin/mboard/rc-pcremote/list.cgi

Bob
Back to top
 
« Last Edit: 06/22/06 at 13:09:06 by Bob »  
  IP Logged
John in CR
Ex Member



Re: hz numbers on a 15" 2 driver
Reply #271 - 06/22/06 at 16:16:51
 
Bob,

I'm not Costa Rican, I bleed red white and blue.

Yes, +6db.  If you have them in the front corners, you should also get some mutual coupling in the lower frequencies, which offset the added distance.  Same tuning would require a shorter port due to the increase volume, so less port noise, but response would fall off a bit faster below tuning.  Try first by just taking the top driver off.  Then try it with your current port and just one driver in the top cap, which will tune you about 2hz lower.  That should get you pretty close to 100db at the listening position, maybe more, at those lowest frequencies with the second box.  The wave expansion from the front should sound better and blend easier, plus you should get some small gain due to placement at the end of your L shaped area instead of projecting from the corner into both sections of the L.

Nothing about the Xbox remote hack at RemoteCentral.  It's only $9 + a USB connector and a little solder, so I'll be the forum guinea pig.
Back to top
 
 
  IP Logged
Bob in St. Louis
Ex Member



Re: hz numbers on a 15" 2 driver
Reply #272 - 06/22/06 at 17:03:29
 
[quote author=John in CR  link=1145573673/270#272 date=1150989411]I'm not Costa Rican, I bleed red white and blue. [/quote]

 :)  Louisiana, right? Grandmother in Illinois?

Quote:
one driver in the top


Dual HWK's with 15"ers sticking out of the tops would look kicka$$ too! Like a gatlin cat launcher. I think it would pass the WAF.  ???

Quote:
Nothing about the Xbox remote hack at RemoteCentral.  It's only $9 + a USB connector and a little solder, so I'll be the forum guinea pig.


Oh, I didn't know it was a hack, thought it was a store bought thing.
Did you try the XBox forums, they have 10,000,000 - 15 year old kids there, surely one of them knows.

#1 I didn't know you were a gamer.  ;D (can't blame this one on the kids, John)
#2 What's it's purpose?
#3 I've got the wireless XBox360, will it work?
#4 Do I need it, probably so.  :-/

Ok, all you closet gamers, come out now.  ;)

Bob
Back to top
 
« Last Edit: 06/22/06 at 17:06:05 by Bob »  
  IP Logged
bassboy
Ex Member



Re: hz numbers on a 15" 2 driver
Reply #273 - 06/22/06 at 17:17:15
 
Looks like you have a big advantage being in the US.  I paid $60 for 2 sheets of mdf and I thought that was pretty good.  I paid $150 for my 15" Quatro (lists $15 cheaper than your Series II's) and I thought that was reasonable too.

It appears Canadians are paying roughly 2x the cost for the same materials.  With this in mind, I think you owe it to yourself to make 3 more and get 12 db more output.  So there.
Back to top
 
 
  IP Logged
Bob in St. Louis
Ex Member



Re: hz numbers on a 15" 2 driver
Reply #274 - 06/22/06 at 17:35:47
 
Yea, welll.... um, ... I'd need another amp,.. and um... the space factor,... and well, um...Then the cost of drivers,.. and ummmm.
Dude, your psycho.  ;D In a good way.

Is that a triple dog dare?

So, now HOW many of those TL's you makin'?   Kiss

Bob
Back to top
 
 
  IP Logged
John in CR
Ex Member



Re: hz numbers on a 15" 2 driver
Reply #275 - 06/22/06 at 17:48:04
 
No Bob, I'm no gamer, although I did play Resident Evil 2 for the PS1 until I got Tofu (no memory card help).  The remote is just to control my PC (movies and music) instead of using my cordless keyboard as a remote control.  It's just a simple cheap conversion.

Regarding your sub, you'd don't need another amp.  Your current one is powering both, so it's the same thing, just 2 different boxes.  Same power needed, etc.
Back to top
 
« Last Edit: 06/22/06 at 17:49:55 by John in CR »  
  IP Logged
Bob in St. Louis
Ex Member



Re: hz numbers on a 15" 2 driver
Reply #276 - 06/22/06 at 18:12:51
 
[quote author=John in CR  link=1145573673/270#276 date=1150994884]Regarding your sub, you'd don't need another amp.  Your current one is powering both, so it's the same thing, just 2 different boxes.  Same power needed, etc. [/quote]


Yea, I knew that for the dual sub arrangment my existing amp would work, it's when bassboy got radical on me and wanted a "Housewrecker array" that I would need more than one amp.

Sorry bassboy, I think I'll have to pass on 4 Housewreckers.  :)
Cool idea though. Say,... how many HWK'ers do you think 60 could stick in his minivan?

John, I found this...

http://www.llamma.com/xbox/Mods/xbox_controller_to_pc_usb.htm

Bob
Back to top
 
« Last Edit: 06/22/06 at 18:20:03 by Bob »  
  IP Logged
bassboy
Ex Member



Re: hz numbers on a 15" 2 driver
Reply #277 - 06/22/06 at 20:20:27
 
I'm just making one prototype to start, but if it works out well you can bet there will be at least one more in the other corner as time and money permit.

Depending on how serious you are about really low bass, it might be worth considering tl's.  My Quatro models about 6 db louder at the same tuning in a tl vs. ported enclosure.  The Series II doesn't model nearly as well in tl (down about 5 db compared to my driver), that's why I didn't buy one of those.

By the way, my box is under 16 cubic feet, outside dimensions, and takes up just over 2 square feet of floor space, how big is yours?

Full report in about T minus two weeks or so, lots of graphs and comparisons between different boxes and my Quatro 15.  There's even a comparison between Quatro and Series II in a tl.
Back to top
 
 
  IP Logged
Bob in St. Louis
Ex Member



Re: hz numbers on a 15" 2 driver
Reply #278 - 06/22/06 at 21:06:16
 
[quote author=bassboy  link=1145573673/270#278 date=1151004027]how big is yours? [/quote]

HMM, kind of a personal question, but if you must ask,.. well, mines exactly twice as big as yours.  :D

Ok, sorry, cheap shot. Fortunately I'm one of the lucky one's, I've got this 'extra' space behind the seating area, so subwoofer size isn't a concern. (and no, a couple Imperial SO's arn't in my future.)

Bob
Back to top
 
 
  IP Logged
Bob in St. Louis
Ex Member



Re: hz numbers on a 15" 2 driver
Reply #279 - 06/26/06 at 21:34:16
 
Well, I started my journey down the OB road this weekend despite the fact my receiver 'shot craps'. I felt like I was installing new tires on a totaled car.  ::) Building speakers for a receiver that's broke.

Made some nice progress. I didn't have cardboard large enough, But I did have some leftover counter top (formica veneered particle board.)

Since I'm using "real material" as opposed to a temporary setup, I figured I'd do it right with symmetry, neatness, ect..ect..
I got the 2 front baffles made, routered resseses for the drivers. Drivers are complements from 2 donor Niles OS-10 surrounds that were originally part of my system.

The wind has been let out of sails with no audio in my house, so I'm like a little kid who's favorite toy has been taken away.
Not much enthusiasm.

Bob
Back to top
 
 
  IP Logged
bassboy
Ex Member



Re: hz numbers on a 15" 2 driver
Reply #280 - 06/26/06 at 23:17:31
 
Bob, got any regular 2 channel amps lying around?  Maybe steal one from the shop or the kids?

It might be time for some 2.1 channel OB for a completely different experience.  If you're going to get into OB, you might as well get completely immersed with only OB speakers (and sub of course).  Any other box types playing the same frequency range are going to swamp the OB's and you won't hear why they are special.

Life, lemons, lemonade, know what I mean?
Back to top
 
 
  IP Logged
John in CR
Ex Member



Re: hz numbers on a 15" 2 driver
Reply #281 - 06/27/06 at 03:02:52
 
Whoa Nelly!!!

Bob,

Please don't go hacking your speakers up.  We have no idea what those drivers are and they may not be suitable for OB.  I didn't even want you to take them off of the existing baffle, just tape some small additions on to what was already there.  You could have used some wood scraps or whatever.  Then leave everything connected, original box behind the baffle, and give it a listen, a 5 or 10 miinute process to get an idea of what OB sounds like.

I think it's time for me to stop throwing out ideas and let you explore away.  Feel free to ask questions any time.  The reason I  jumped in to begin with was that I hated to see you scrap a perfectly good cab, when I knew you could make some minor changes and achieve something closer to what you were looking for.  If my new sub works out, I'll run the numbers with your drivers and see if something similar makes any sense for you.
Back to top
 
 
  IP Logged
bassboy
Ex Member



Re: hz numbers on a 15" 2 driver
Reply #282 - 06/27/06 at 03:30:13
 
I'll admit that I know very little about OB but I do know that high Q drivers work best.  High Q = small magnet and lightweight material = drivers that can be very cheap.  I would assume old factory car speakers and old cheap home drivers would work great.  That equals free of charge.  So now that you have a frame I would go ahead and use it with a wide assortment of different drivers to see what's possible.  Small surround speaker drivers are probably not very suitable to OB but you should be able to get your hands on some good ones.

Other than the excellent resources here, there is a lot of info on other forums.  A good place to start would be diyaudio.com.

I haven't been interested enough to study any of it yet but I would think that you could make something that sounds and looks very good for very little and maybe even no money.  It might be hard to go as low as your sub crossover point for free though.
Back to top
 
 
  IP Logged
Bob in St. Louis
Ex Member



Re: hz numbers on a 15" 2 driver
Reply #283 - 06/27/06 at 12:04:00
 
John, No speakers were harmed during the making of the baffle.
The Niles screws were turned to the left, No damage done. Empty plastic enclosures complete with stuffing and screws are safely tucked away from the sawdust. If it all goes to hell, They can be reassembled. No harm done.

Please DON'T EVER STOP throwing ideas my way. Never, Never, Never.

When I build something, I don't take the time to make written plans. Because I'd probably change something anyway which would make the plans null and void. That goes for outdoor decks, indoor speakers, or entire finished basements. No plans. Ideas are generated and stored in the noggin.
So when I set out to try OB, I did a quick inventory of my building materials and found that the Formica was some pretty cool lookin' stuff (the counter top is leftover from the bar in my pics.) Thought it would be cool if OB's matched the bar.
Yea, I got carried away, took your idea to an extreme.
My ideas sometimes get extravagant, but an audio noob with radical ideas can be a dangerous thing. John, I like your ideas, keep 'em comin'!  ;D I'd rather build your ideas instead of mine. Granted, 'play time' in the workshop is a good learning experience for me, BUT, I'd rather build something with a more proven track record than what my brain can come up with.

By the way John, the drivers cones are plastic.
The tweet's domes appear to be a synthetic fabric type material, VERY soft material, the dome deflects with very little pressure from a finger tip. They've also got one heckuva large magnet for a tweeter (IMHO).

Early Saturday morning I stopped by the local pawn shop to check for orphaned drivers. All they had were large car subs, and guitar amps.
A couple local flea markets (huge one's) may be a good place to explore. Havn't been in years.
Unfortunately being a noob, I wouldn't have a clue what I'm looking at a far as what is acceptable for what type of enclosure (unless of course is says Visaton B200  ;D). And I'm sure the drivers sitting on a table at a flea market arn't going to have T/S numbers.

Bob
Back to top
 
 
  IP Logged
John in CR
Ex Member



Re: hz numbers on a 15" 2 driver
Reply #284 - 06/27/06 at 15:31:44
 
Bob,

Yes, the formica to match the bar would have been nice to use, but now you've used it on test baffles.

In general, you're looking for smaller magnets.  That is usually an indicator of higher Qts.  Ideas for cheap-  The 8" Pioneer full ranger from parts express for $25.  Check out car audio installation shops for the factory drivers they remove from the rear deck of cars.  Most of the whizzer coned 6.5" in the back dash are used in a free air alignment (IB), so their parameters are perfectly suited for OB use, and they typically sound surprisingly good especially with a tweeter added to the top end.
Back to top
 
 
  IP Logged
Pages: 1 ... 17 18 19 20 
Send Topic Print