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Porn Horn V3 ideas |
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Heathrow_B_line 
Old Croc 
Joined: 11 January 2006 Location: United Kingdom Status: Offline Points: 7344 |
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 Topic: Porn Horn V3 ideasPosted: 21 October 2007 at 2:59pm |
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Something like this would be cool!
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Disco Stu
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Joined: 03 March 2005 Location: United Kingdom Status: Offline Points: 2487 |
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Posted: 21 October 2007 at 7:36pm |
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Whats wrong with the V2?
Why do you want a coaxial? You are then limited to 1 per stack unless you dont care about comb filtering in which case why are you trying to use such a high quality cab if youre just going to ruin it with bad placement.
IMO the Porn V2 is a flawed design because you cant stack if unless you turn it on its side and then the trap shape makes that awkward. The mouth isnt really low enough to get down to 80Hz on its own so you either need a sub that goes up to meet it or multiples (which you cant do without combing)
However why Rog didnt seem to care about this I dont know, all I know is that I hear combing, I hear it very clearly, something about my hearing tells me it sounds bad so I avoid it at all costs
Stu
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Heathrow_B_line
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Posted: 21 October 2007 at 8:51pm |
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IF you heard one you would not tink it was flawed.
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JaKe
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Joined: 14 September 2007 Location: N.E. Wales Status: Offline Points: 684 |
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Posted: 21 October 2007 at 8:58pm |
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It looks very similar to the insides of one of these http://www.dbaudio.com/en/systems/c_series/c4_top/
JaKe |
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ceharden
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Posted: 21 October 2007 at 10:52pm |
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There's a good chance that pic is actually the skeletal version of the C4 top.
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Heathrow_B_line
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Posted: 22 October 2007 at 1:32am |
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yea it is the c4 but without the cab... c4 is alot smaller then the porn horn though.
I am loving the D&B gear these days, the b2 looks wicked. On a plus point there are links to the C4 top, C4 sub and b2 plans this site, so provides food for thought.
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mykey
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Posted: 22 October 2007 at 8:59am |
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And I agree with HBL, when you listen to them side by side they are very nice indeed
no need to stack them.
Bit more expensive than the MX12 though HBL
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Disco Stu
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Posted: 22 October 2007 at 11:48am |
Heathrow - I have heard enough Void Cabs to know the quality of Rogs designing and yes you are right its good!
Mykey - BUT....
What if you need more SPL?
Porn horn is what 106dB with 300W would give a theoretical 131dB which is a fair amount but what happens when you need more? OR more importantly what happens when you need more extension to go down to meet a sub at 100Hz.
So the design forces you to choose subs that go up to 140Hz since a) No sane person crosses a single 12" on a horn with a small mouth at 120Hz and b) You need something left in the response of the speaker below the crossover point to make the transition smooth at that frequency.
It doesnt cover the vocal range on its own (doesnt go down to 100Hz) so MUST be used in a proper stack with the kick bass at at least chest height or the vocals will sound thin
Those arent criticisms for a lot of people because I am sure many will have the ability to set up a system like this - but it means you always have to take out a monster rig to get them to sound good in conjunction with the rest of the rig - Whether they sound good on their own is irrelevant as they dont make up a complete sound system - and you tested them with 4 HDs and 4 X1s!
Im sure it sounded great but lack of flexibility is the phrase that comes to mind.
Stu
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Heathrow_B_line
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Posted: 22 October 2007 at 12:24pm |
when you think it would take 2 or 3 mx12 boxes to be as loud as one porn it soon starts looking like the cheap option.
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ceharden
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Posted: 22 October 2007 at 12:26pm |
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Just thinking.... You're finding all these issues with the Porn Horns, don't go low enough, not loud enough etc.... I assume therefore that you must have even more issues with every other cab based around a horn loaded 12" driver. The Porn horn, because of it's size should actually go lower and louder than most of the other designs. Even with multiple cabs they still won't get much lower because it's mainly determined by the horn length rather than mouth size in this case.
I run direct-radiating twin 12" mid tops which are capable of going well below 100Hz but I actually run the crossover to the subs at 110-130Hz, sometimes higher without any problem with the vocals. Most of my work is live bands. If you want to use a Porn Horn or any other horn loaded midrange then you have to design the system around them... |
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Disco Stu
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Posted: 22 October 2007 at 2:32pm |
Yes I do and I have only heard them sounding good when part of a 4/5 way system installed - which is not practical for small scale touring - Double 12 versions of such cabs usually perform a lot better for smaller applications IMO and for me would give a much more useful solution. In the same way that 1x Bass horn is not "useful", 1x12" horn is also not "useful" for a wide range of applications and since the only place the Porn seems to be pushed is this forum surely the design brief is somewhat misguided for the target audience? Either that or the suggested setup - I think setup with 2x12" horns and 1xHF you would have a much more complete system.
The Porns dispersion is wide enough that you can only have 2 cabs spaced to handle roughly 180 degrees horizontal and because of its typical horn on top of mid rather than horn alongside mid there is about only one way to stack and thats MTTM so you would have to be content with 4 cabs per cluster if you arranged this way - I presume this is an acceptable compromise for most - Either way I think Rog has missed a trick by not going with a standard double 12" config in keeping with MT122
As you say you use double 12"s but reflex are very different things as the stress on a driver below the cutoff of a horn is much greater than in a standard reflex so you can do this - I think thats why 4560 type designs still have their merits.
Stu
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All you need to know is:
Sensitivity + Power Handling - Power Compression = Max Output My acts: www.myspace.com/thebowiexperience www.myspace.com/scheisseelektronisches |
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ceharden
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Posted: 22 October 2007 at 2:50pm |
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I think the point is that you should only be using horn loaded midranges like the Porns in large systems when the disadvantages aren't an issue. They were never designed for small scale touring. If you want to just run a 3 way system with one or two tops per side then I think direct radiating 12" or 15" mids are a much better solution.
The system I've been taking out to do bands recently is (per side) one twin 18" sub and one twin 12" + 1.4" mid-top. That's been doing venues of a few hundred capacity without even breaking a sweat (rarely reaching -6dB on the LMS). On the other hand, one of the venues I work in for live bands has two Martin F1 tops per side (single 12" horn loaded + HF) for a capacity of up to 500-800 people. Assuming the Porns are louder than that I don't think you really need more than 2 of them per side for a lot of applications. |
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mykey wrote: