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Old 20th October 2011, 12:48 PM   #1121
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Join Date: Dec 2010
Location: Coffs Harbour NSW 2450
Quote:
Originally Posted by AndrewT View Post
But, which is more important contended paying customers or broken equipment?
this is true. and understood.

when i play with them on the weekend i will assess their ability to play low vs cutoff and decide which way i prefer. coz when its playing, i like to listen to it as well as play.
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Old 20th October 2011, 02:47 PM   #1122
Djim is offline Djim  Netherlands
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Location: 'Ollanda
Often people 'forget' to use a make-up EQ when filters are in use. For instance the average 12dB/Oct filter starts to influence the signal about 3 times (roughly) above its frequency. So a 30Hz filter is starting to influence the signal from 90Hz down low.
Also, never trust the filter figures given by the manual of an amplifier. Often these figures are not accurate.

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Old 21st October 2011, 01:41 PM   #1123
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Join Date: Dec 2010
Location: Coffs Harbour NSW 2450
since i have three SS15s now, two with 15s one with a 12 inch driver, i just tried them with the 15/12 standing up normally, and the 15s on their sides on an angle with a lid to form a big one mouth horn. can someone possibly model on hornresp the resulting spl response?

the mouth ends up being 22inch x 46inch, and 24inches from the center of the existing mouth to the new mouth.

if someone can model that, it would be interesting to see how it affects the response.

keeping in mind, it actually has 3 SShorns feeding it.

aurally, it seemed to drastically lower the response to the point of just rumbling the floor and not be able to hear it as such. current XO point is ~80hz.
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Old 21st October 2011, 03:22 PM   #1124
jbell is offline jbell  United States
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Quote:
Originally Posted by klampykixx View Post
since i have three SS15s now, two with 15s one with a 12 inch driver, i just tried them with the 15/12 standing up normally, and the 15s on their sides on an angle with a lid to form a big one mouth horn. can someone possibly model on hornresp the resulting spl response?

the mouth ends up being 22inch x 46inch, and 24inches from the center of the existing mouth to the new mouth.

if someone can model that, it would be interesting to see how it affects the response.

keeping in mind, it actually has 3 SShorns feeding it.

aurally, it seemed to drastically lower the response to the point of just rumbling the floor and not be able to hear it as such. current XO point is ~80hz.
There are things that happen in respect to the directivity to a tapped horn that I don't know how to model. The classic example is where I measured different directivity standing up vs on side. Compound that with 2 on side and one upright... and you have a 'how many teeth does a horse have' kind of situation.

aka, 2 farmers can argue all day on how many teeth a horse has, or someone can go over to the horse, open his mouth and look.

You have the boxes, buy you a cheap spl meter (if you don't have one) download some test tones and 'go look' and report back what you find.

Glad you like your boxes. I know they are loaded up with drivers you had available to you. All audio is compromise, and it sounds like you have a compromise that makes you happier than you were before -- congrats.
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Old 23rd October 2011, 02:54 PM   #1125
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Location: Coffs Harbour NSW 2450
so last night was the first outing for my 2x SS15 and single ss15/12. and i must say, wow! i thought they sounded good in my house! after hearing them "proper" loud they sound so much better loud than they do soft.

my favourite moment (as i was dj i tended to stay behind them alot) was when i ventured out on the Dfloor to Michael Jacksons BillyJean. had about 30 peeps on the floor and i stood behind them about 8m back from the subs, and i was still getting kicked in the chest!

I am so very impressed Jbell. you have done a brilliant job in designing these horns.
I could only imagine how they would sound with the KappaPro in them with some real power behind them.

edit: and i decided just to group them in a straight line with the two outers slightly angled in. didnt bother with the coupling idea this time.

edit2:

this is at low volume at home, recorded off my nokia. opening track PinkFloyd Darkside of the moon. http://s930.photobucket.com/albums/a...1102011104.mp4

and my stack.

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Last edited by klampykixx; 23rd October 2011 at 02:58 PM.
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Old 23rd October 2011, 03:04 PM   #1126
AndrewT is offline AndrewT  Scotland
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We can count this as a success then.

Did you use a protective high pass? What frequency, what Q, what attenuation rate?
__________________
regards Andrew T.
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Old 23rd October 2011, 03:50 PM   #1127
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Location: Coffs Harbour NSW 2450
no hi pass, low passed at about 80. But they werent being pushed real hard either. I kept my eye on the magnet temps. Barely lukewarm. Wich is good. And with plenty of excursion left. Even with the lower frequencies that tend to push them further.
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Old 26th October 2011, 12:57 PM   #1128
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Location: Fort Collins Colorado
Quote:
Originally Posted by m R g S r View Post
Tell him to build (2) Berta's with the mouth extensions (Levan) Insane Bass from them!

Now This is a sub! Bertha...W bin

Personally I don't think the ss15's will be enough for a club considering the tuning...Many songs will have content below the tuning and can kill the drivers pretty easily (without proper monitoring of clipping etc)
Having worked with berthas and similar cabs, and knowing the old NY club sound, the bigger tapped subs work very very well. I can only speak for the furysubs from experience (Jbells mini is similar as well as others) they go lower and hit harder than berthas. Richard Long is one of my heroes so for me to say the tappeds are better is no small thing. 6 decent sized 15" tappeds are way easier to carry around and set up. The sound pressure level will make people sick if u want.
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Old 26th October 2011, 01:16 PM   #1129
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Join Date: Jun 2005
Location: Fort Collins Colorado
Quote:
Originally Posted by jbell View Post
scott (screamersusa) runs 3 subs per on crest amps if I remember right. He's a huge fan of that combination, as 3.2 ohms gets about the most out of most amps.
Yep.. 3 speakers off a HIGH QUALIY AMP... The impedence changes as the speaker moves.
A high quality two ohm amp (Crest,QSC,Crown etc) designed to run all day and night at two ohms, is very happy at 2.6-3.2, I especially recommend this as your minimum with older used amps (and I will enforce it with a baseball bat).
I NEVER bridge my amps unless they are driving ONE speaker. The slight differences between channels when pushed by idiots always results in a fried channel and many times a dc burnt speaker coil.
If the amp is not designed for 2 ohms, only use 2 speakers or 4 ohms. Read the fine print carefully and the back of the amp. There are some amps with a two ohm rating...... that rating is for 1/10th of a second before the amp fries or basically a LIE. Dj amps are notorious for this. Read carefully before going to a 3 cab per amp channel setup. Amp manual may say 2 ohm but back of amp says 4 ohm minimum, that's a clue.

Example rig: Crest Ca12, 3 kappa lite 15 per side. Running almost 3 years now, hardly ever clipped. No problems as yet. Avg sound pressure level in club 110db constant on the dance floor, 108 at console 40 feet away.
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Old 26th October 2011, 06:02 PM   #1130
Djim is offline Djim  Netherlands
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Found an interesting 'cheap' NEO replacement for the Eminence 3015LF that sims very similar but has on paper slighly better specs, the Monacor SP-15/500FH. In Europe you can find it for less than 200 Euro's and has an Xmax of 9,25mm, power rating of 500Watt rms - 1000Watt max and weights 4,4Kg.

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Last edited by Djim; 26th October 2011 at 06:27 PM.
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