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Imperial upper end (Read 7867 times)
j_rock777
Ex Member



Re: Imperial upper end
Reply #15 - 07/28/05 at 17:31:53
 
way to rain on my parade! what are some cheap drivers with the correct values then?  hehe I am majorly bummed that I don't get to build these but thankful for you guys saving me some time and MONEY!
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j_rock777
Ex Member



Re: Imperial upper end
Reply #16 - 07/28/05 at 18:40:10
 
so I want to take fs divided by Qes? is that it?  so 40/.4= 100right?  (thats a selenium driver)
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dank
Ex Member



Re: Imperial upper end
Reply #17 - 07/28/05 at 21:36:10
 
yep, you got it.  Is that the Selenium 15pw5-slf you are talking about?  Its in my PartsExpress catalog for $89 (a lot more than the speakers you wanted to use).  However you are probably talking $400 worth of materials to build your Imperials, so filling them with $25 speakers may not be the best bang for your buck.  If your going to spend $89 for a speaker, I think you might do better on Ebay.  You can sometimes find JBL E-140's in the $60 range which will put it up to $90 when you add shipping, and yea its a risk but I've bought a lot of good used speakers off Ebay (just be sure you get the shipping insurance), and a JBL E-140 has Fs/Qts = 32/.17 = 188.  Here is a link to the thiele - small data base which will help you out:

http://www.thielesmall.com/database.asp

(read the directions - I only enter diameter and brand)
Good luck.  Again, your probably only talking 1 speaker per (full range) Imperial that needs the high Fs/Qts.  The other needs good frequency response, ideally a coaxial.
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Braggi
Ex Member



Re: Imperial upper end
Reply #18 - 07/29/05 at 15:34:50
 
Gee whiz, Dank! That's quite a stack of speakers there. How about sharing some more pics and telling us your story. Looks like you could teach us a lot. A new thread maybe?

Thanks
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dank
Ex Member



Re: Imperial upper end
Reply #19 - 07/29/05 at 16:12:34
 
Braggi and all

See my post in the "Scorpion Vs Black Widow in Imperial" thread for some pictures and my story.  The pictures have changed a little from the descriptions in that post as I figured out a way to fit dual 18's in and thats what I'm running now, dual Cerwin-Vega 18's on both sides.
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stvcmty
Ex Member



Re: Imperial upper end
Reply #20 - 07/30/05 at 04:06:11
 
With all the talk about the inexpensive woofers that steel sound sells, I remembered this sight:
http://www.cheaplights.com/catalog/01_info.php?sec=411
They are a good place to get steals on woofers.  The 411-WF1558 is really a Gold Wood 1558, but I had to do some digging to find that out.  The 411-WF15120 is a gold wood 15120...
Stv
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j_rock777
Ex Member



Re: Imperial upper end
Reply #21 - 07/30/05 at 14:54:21
 
That site looks quite a bit cheaper! thanks for that, I noticed all of those woofers looked alot liek some better known companies.
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stvcmty
Ex Member



Re: Imperial upper end
Reply #22 - 08/31/05 at 01:35:31
 
J_rock777,

Did you get a quote from Steel Sound for the construction of an imperial?
[Without any drivers]

Stv
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J_Rock
Ex Member



Re: Imperial upper end
Reply #23 - 08/31/05 at 02:33:07
 
actually, i was hoping to build it myself, but i have run out of money and i had trouble selecting cheap, usable drivers.
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J_Rock
Ex Member



Re: Imperial upper end
Reply #24 - 10/01/05 at 21:31:35
 
How abotu those 15 inch goldwood lookign drivers on cheaplights:

http://www.cheaplights.com/catalog/01_info.php?sec=411

$56 a piece?
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Hrappur
Ex Member



Re: Imperial upper end
Reply #25 - 10/01/05 at 21:41:17
 
Ive seen bigger magnets on my fridge
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gexter
Ex Member



Re: Imperial upper end
Reply #26 - 10/02/05 at 02:53:05
 
LoL thats good one Smiley
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Brian
Ex Member



Re: Imperial upper end
Reply #27 - 12/19/05 at 23:23:17
 
[quote author=j_rock777  link=1122076674/0#0 date=1122073074]Does the larger flare of Steve'd horns increase efficiency? [/quote]
This is kind of an old thread but since nobody answered this question I thought it might be nice to get a discussion started.  It seems to me that since the larger mouth will permit the horn to play a broader spectrum, it will therefore play not as efficient as a one which was concentrating the driver's power into a narrower range.  
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