Welcome, Guest. Please Login or Register
Decware Audio Forums
11/01/14 at 00:10:35


Pages: 1 ... 6 7 8 9 10 ... 12
Send Topic Print
Amp to make Dayton's happy (Read 30790 times)
Bob
Ex Member



Re: Amp to make Dayton's happy
Reply #105 - 01/31/06 at 17:59:57
 
HT-EXT, keeping my amp cool may not be a problem. Read a few posts back where I describe the cooling system of this amp. It is the same cooling system used by NASA to cool the launch platform for the space shuttle. I read the manual, and it says the amp fans are normally running in "low" mode. I may need to wear ear protection if these fans ever kick on "high".  :)

Bob
Back to top
 
 
  IP Logged
Sean
Ex Member



Re: Amp to make Dayton's happy
Reply #106 - 01/31/06 at 19:20:18
 
Bob - I think I know what you might be getting at.  In fact, I had been considering changing my HWK alignment from both magnets in the center chamber to both magnets down, and then adjusting the lower chamber to bring its volume back to what it was.  As an experiment, try clamshelling both drivers in the bottom baffle - you may need to make a spacer because I think the surrounds will touch if you couple them directly together.  This will change the way your box works - eliminating the large center chamber and making it a basic sixth order bandpass box, with a frequency response which is quite a bit lower (since the top chamber is now huge).  I did this with my Daytons and was blown away by some movie effects (I think I was watching "Aliens").  As impressive as this was, having the frequency response shifted so low wasn't well suited to listening to music, so I went back to a driver in each baffle.  In any case, I would definitely try both the clamshell in the bottom, and simply flipping the bottom driver over so that both cones face the top, to see what you prefer for your style of listening, and also give you a feel for the effect of changing driver configurations on the output of this enclosure.

-Sean
Back to top
 
 
  IP Logged
Bob
Ex Member



Re: Amp to make Dayton's happy
Reply #107 - 01/31/06 at 22:50:29
 
Good thoughts, but I'll play with it for awhile like it is. I went a little overboard on the 'stiffness' of the bracing between the two drivers (both magnets in center chamber).  What I did is not totally permanent, but a real PITA to switch driver direction without exploring easier alternatives first. Not ruling it out though.

Bob
Back to top
 
 
  IP Logged
60ndown
Ex Member



Re: Amp to make Dayton's happy
Reply #108 - 02/01/06 at 02:08:53
 
i still vote for excellent quality over 'effect' im sure if you set your hwk up accurately,  forget about wanting 'in your chest' bass and get used to 'articulate accurate bass' you will find that it is way more satisfying. a bit like 'just the tip in' is actually more exciteing than 'full immersion'  ;) weird analogy i know but it the best i can do right now!, maybe the difference between a muscle car and a merc? which one would you actually prefer to drive every day!
Back to top
 
« Last Edit: 02/01/06 at 02:10:33 by 60ndown »  
  IP Logged
Bob
Ex Member



Re: Amp to make Dayton's happy
Reply #109 - 02/01/06 at 11:58:34
 
Merc..edes, or Merc..ury?

60, Despite may rantings about 'in my chest', I'm still quality over quantity.

That being said if the room was 100% listning room, meaning audio only I'd go for 100% quality sound. Except when I played the 1812 Overeture [sp?] HA HA!! But since it's main purpose is theater / movies, I suppose it's more like 80% quality / accurate sound and 20%, well, ...... BOOM!  I want my jazz to sound very good, but I don't want the bombs / explosions to sound weak. May be the shakers / transducers are looking more like a viable option. Sounds like a good reason for a new thread?

Bob
Back to top
 
 
  IP Logged
60ndown
Ex Member



Re: Amp to make Dayton's happy
Reply #110 - 02/01/06 at 14:18:23
 
the explosions etc will SOUND excellent and be very satisfying, its just that shakeing the couch is not easily done below 172db! would you pour sugar into a quality glass of wine? put 'lengerie' on a beautiful woman? 'spinning hubs' on a ferrari? ketchup on a great steak? good bass is refined and extremely satisfying when deliverd naturally, the in your chest sensation your seeking is an 'abomination' of the real thing.

do me a favor untill your 'shakers' arrive.set up your audio rig with everything flat, watch a movie you know well that has good audio, have the houswrecker turned up to a good level but no bass boost or eqing just x it over at about 70 hz and turn it up and watch the movie.when a low note / sound hits, notice how it sounds 'real' maybe not vibrateing your couch, but it will actually 'sound' real , and you should be able to idetify the difference easily between a car door being closed and a dead body landing on the ground, insted of everthing just sounding like a boom or a thump.haveing 'a thunder clap' tickle your brain( and i say brain because the sound enters either sida of it and start tickleing) @ 12 hz accurately is very very weird and excellent, see if you can find a movie with some good thunder in it!

try it?
Back to top
 
« Last Edit: 02/01/06 at 14:24:50 by 60ndown »  
  IP Logged
DirtDawg
Ex Member



Re: Amp to make Dayton's happy
Reply #111 - 02/01/06 at 16:20:27
 
[quote author=60ndown  link=1137542099/105#110 date=1138803503]the explosions etc will SOUND excellent and be very satisfying, its just that shakeing the couch is not easily done below 172db! would you pour sugar into a quality glass of wine? put 'lengerie' on a beautiful woman? 'spinning hubs' on a ferrari? ketchup on a great steak? good bass is refined and extremely satisfying when deliverd naturally, the in your chest sensation your seeking is an 'abomination' of the real thing.
.....try it? [/quote]

Man, what a list of embarrassing mistakes ...... The best recorded thunder I've heard was on a B-5 episode, (I mean it was real!) but next is the "Sounds of Nature" CDs. I know they're really lame, but they were a gift from some New Age friends of ours at a baby shower and the thunder kicks.

BTW my LFE rig is only theoritically capable of 118dB@15Hz and I've never even gotten close to clipping, but my couch moves plenty when it's supposed to!
Back to top
 
 
  IP Logged
Bob
Ex Member



Re: Amp to make Dayton's happy
Reply #112 - 02/01/06 at 22:25:39
 
Yes 60, I will try it. I'll need to go buy new movie though. I've been through all of DVD's searching for what I like to call "ear candy". And am getting too "used" to them. The 2 good examples of thunder I have are #1 "The Day After Tomorrow", a few chapters in. And on "Star Wars III", the THX intro with thunder, lightening and the planet shatters and 'tinkles' down. Both very good.

DirtDawg, I've seen the 'Sounds of Nature" cd's in stores, but have not heard of  a cd called B-5. Those are good ideas. Never thought of actually buying them.  ???  I'm just enough of a nut to go buy some sound effect cds, sit in my cave, and listen to thunder and rain.  My wife will think I lost it for sure.

HEY....Now that I think about it, anybody seen an equivelant DVD of this type of stuff??    Maybe HD??  ;D

Then I can have my eye candy along with my ear candy....

Hey 60ndown, yes I would put 'lengerie' on a beautiful woman.
   at first......... Then I'd ...... um....... Shocked

Bob
Back to top
 
« Last Edit: 02/01/06 at 22:36:18 by Bob »  
  IP Logged
Bob
Ex Member



Re: Amp to make Dayton's happy
Reply #113 - 02/03/06 at 13:38:33
 
Just bought (4) of these ....

http://www.partsexpress.com/pe/showdetl.cfm?&DID=7&Partnumber=299-028

Thanks for the recommendation, very good price.

Now if only my seating would come .......

Bob

p.s. Guess I'll strap them on my chest til then.  ;)
Back to top
 
 
  IP Logged
DirtDawg
Ex Member



Re: Amp to make Dayton's happy
Reply #114 - 02/03/06 at 16:28:13
 
[quote author=Bob  link=1137542099/105#112 date=1138832739]

DirtDawg, I've seen the 'Sounds of Nature" cd's in stores, but have not heard of  a cd called B-5. Those are good ideas. Never thought of actually buying them.  ???  I'm just enough of a nut to go buy some sound effect cds, sit in my cave, and listen to thunder and rain.  My wife will think I lost it for sure.

Bob [/quote]

Hey, Bob,

Before you check the stores for that kind of stuff, try the library. I don't know if I'm alone in this but, our local public library is absolutely amazing after an expansion a couple of years ago. I recently did a number search at the library and they have over 60 thousand disk titles, now. They have as varied a selection of DVDs as Blockbuster does. Although delayed by a few months on new stuff, they're free! For a special effects CD, which you won't use very often, I would certainly look there first.

B-5 (DVD) is a cult followers name for "Babylon 5", a series from Showtime a few years back. It was a Sci-Fi program, which was considered groundbreaking in the areas of cinema-like sound and definition over the air/satellite on a TV series budget. It also had a complete saga, beginning to end, written before it was started, unlike most series productions which watch for viewer polls to tell them what's next. It is a little cheesy compared to the latest big budget movie, but if you are a Sci-Fi fan you should give it a try.

I can't remember which episodes, took place on Mars (in the process of being terraformed) where violent thunderstorms are common. The sound was prety good throughout the series, though.

A stable amp is all you need with your Aura's. They present a hghly inductive load similar to a massive wall of speakers, but the impedance and current draw (someone mentioned Roll Eyes) is predictable. You can probably drive them with the same amp if you are creative with your wiring. Just stay within the recommended impedance capacity of your amp. I wouldn't mix them with speakers on one channel, because of the higher reactance. Put all the shakers on one channel and all the speakers on the other.

On other thing many forget is that the phasing on the shakers is just as critical as your main speakers, and switching it around until you get the best result will be necessary. I hope you enjoy your shakers.
Back to top
 
« Last Edit: 02/03/06 at 16:30:48 by DirtDawg »  
  IP Logged
Bob
Ex Member



Re: Amp to make Dayton's happy
Reply #115 - 02/03/06 at 16:52:11
 
Yes, I've heard of that show, havn't watched.

The front of the amp has seperate controls for channel "a" and "b" for the two channels, so adjustability should be ok. I agree the sub should be on one channel, and shakers on the other. I found this on Parts Express web site, looks good to me. How about this for the shaker channel?

http://www.partsexpress.com/pdf/series%20parallel.pdf

What do you think?

Library is a good idea, our local one just moved to a huge new building. Judging by the outside I would think the selection is impressive. AND FREE.

Bob
Back to top
 
« Last Edit: 02/03/06 at 17:20:08 by Bob »  
  IP Logged
DirtDawg
Ex Member



Re: Amp to make Dayton's happy
Reply #116 - 02/03/06 at 17:26:33
 
Don't judge a library by the bricks on the outside. Roll Eyes
Sorry, my "tic" is coming back. Grin

That scheme looks perfect. If the items (whatever they are) you are connecting with that diagram are all the same impedance, the total impedance of all 4 connected in that fashion, combine to equal the same impedance as a single unit.

In other words if your shakers are 8 ohms each, then a block of four, in a series/parallel arrangement, will be 8 ohms also.
Repeat as necessary.
Back to top
 
 
  IP Logged
Bob
Ex Member



Re: Amp to make Dayton's happy
Reply #117 - 02/03/06 at 18:33:00
 
I may need to go to "audio" math class. I might be confused, I'm not sure?? Here's specs for the amp...

Stereo: 225 x 2 at 8ohm, 400 x 2 at 4ohm, 450 x 2 at 2ohm
Mono: 800 x 1 at 8ohm, 900 x 1 at 4ohm

Here's the spec on the shakers...

Power handling: 50 watts RMS/75 watts max. *Impedance: 4 ohms

Here's the spec on the Dayton's...

Nominal impedance: 8 ohms (still 8 ohms when wired 'together' ' parallel, I assume)

Now, looking at the stereo specs of the amp, I'm assuming the HWK would be one "side" of stereo, and shakers the other "side" of stereo, as far as the amp is concerned.

So, wire as planned...? Is the max wattage to shakers 225W? And the max wattage to the Dayton's also 225W? If so, all is good for the shakers since max wattage for (4) Aura's is 200W. But then my Dayton's are being starved with only 225W?

Or am I stupid?    :'(

Bob
Back to top
 
« Last Edit: 02/03/06 at 18:51:11 by Bob »  
  IP Logged
60ndown
Ex Member



Re: Amp to make Dayton's happy
Reply #118 - 02/04/06 at 16:21:13
 
connect the daytons in paralell = 4 0hms. = 900 wrms = you dont need any bass shakers Grin
Back to top
 
 
  IP Logged
Rap
Ex Member



Re: Amp to make Dayton's happy
Reply #119 - 02/04/06 at 16:38:21
 
[quote author=Bob  link=1137542099/105#117 date=1138991580]I may need to go to "audio" math class. I might be confused,

Nominal impedance: 8 ohms (still 8 ohms when wired 'together' ' parallel, I assume)



Bob [/quote]

If you wire 8 ohm parallel they will be 4 ohms, in series they will be 16 ohm Grin
So you could wire the daytons parallel and the shakers like in pdf. The shakers would be 2x4 ohm parallel =2 ohm and then another pair in parallel = 2 ohm. 2ohm in series with 2 ohm is 4 ohm again Smiley So now you have a 4 ohm load on both sides.

60 dosenīt have any neighbors any more Smiley
Back to top
 
« Last Edit: 02/04/06 at 16:42:59 by Rap »  
  IP Logged
Pages: 1 ... 6 7 8 9 10 ... 12
Send Topic Print