BTW I envision a Dj booth with two imperials upright to the sides of it.  These two imperials and whatever I have to do for the high end being driven by two or more amps with a larger passive mixer for equalization and effects.  The entire thing would be able to play cds or mp3s or enable a DJ to hook up his tables and spin.  Are imperials the right choice for me? or do I need to go somewhere else in design.  Are two imperials enough for the loud club type enviroment?

BTW, I built a semi-accurate 1/4 scale imperial out of cardboard using those cheap 4inch pioneers from PE.  I got bass response I have never heard from the little things.  I was quite amazed.

I second that!
they would be cute little things, a real conversation piece.

prototypes are rarely pretty, Mine are pretty ( ugly ) that is.
No worries, Glad your playing around and I can learn something.

aww They can't be worse than mine!

http://au.geocities.com/footstony/half80.html

Regards Philip

those are, er , ah ,, well  a  carboard Imperial. But on the good side they are working Imperials.
15" in a carboard Imperial, thats pretty amazing actually!
this is somewhat funny because people made fun of me years ago when I made enclosures out of fiberglass reinforced cardboard.
A cardboard Imperial would be alot easier to move thats for sure.
and Ya you made me reconsider putting my Pics up when I get finished. That is if j_rock777 does'nt beat me to it!
I am freehand cutting ( no straight edge ) so when I glue them together it should be interesting.
But I think I'll see if I have some clear silicon around LOL!
I'll dig into your page a little deeper later, probably find some good tips.

Thanks Philip
My Apologies to j_rock777 for sidetracking his thread, sorry buddy!

J_rock:  I have a pair of Imperials I use as subs.  I built them with removable baffle boards and have tried about a dozen combinations of 15" and 18" speakers.  I (later) came across someone on this forum stating that the speakers Fs / Qts should be high, like over 120, and that this is an indication of magnet strength and how well the speaker can move air - which is more important in a folded horn enclosure than in other types of speaker boxes.  I confirmed this by finding on-line somewhere a similar statement.  So, knowing enough to be dangerous, I made a list of the speakers I had tried and their Fs/Qts.  Not only did the speaker that I disliked the most have the lowest Fs/Qts (66-Black Widow 18"), but the speaker that I liked most had the highest Fs/Qts (166 Cerwin-Vega 18").  Looking at your Warrior 15, I see that its Fs/Qts is around 44 (50 oz magnet) and I can't even find the Archer 15 specs, but its got a 30 oz magnet so I suspect the Fs/Qts is even lower.

http://madisonspeakers.netfirms.com/0105/products/rawdrivers.htm

Bottom line is that I don't think those drivers are going to do justice to your Imperials.  Having never worked with a "full range Imperial", I don't know if any of this applies, but I suspect that at least one of your drivers needs to have a high Fs/Qts.  I have been looking hard and long at the Madison Executioner X 18 from steelsound because I like the 103 db sensitivity, the Xmax of 3/4 inch, the 4" voice coil, and the 200 oz magnet seems reasonable, but the Fs/Qts is only 66 and that scares me. - Dan

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!

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.

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.

That site looks quite a bit cheaper! thanks for that, I noticed all of those woofers looked alot liek some better known companies.

actually, i was hoping to build it myself, but i have run out of money and i had trouble selecting cheap, usable drivers.

Ive seen bigger magnets on my fridge

[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.