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nickyburnell wrote: Top bloke, keep the knowlege coming smiley20
If lev is talking about my mods, yes is the same that you did plus others, but the internal layout is very similar to mk1.
nickyburnell wrote: These MS18 mods the same ones I did?
Absolutly none scientifically. Have a friend who has lots (and I mean lots) of Opus 2x18's. His take is that his horn loaded stuff (modded USB) although a lot less of it, cuts through the crowd in dense situations better, giving the perception of a louder rig.
Pehaps this just isn't measurable?
No, I don't think the Y tag is good for that. If port coupling make difference at 1 meter in the response curve, it must be the same at 10 meters. If you make the sim at 1 meter, then if you put the port at 2 meters high, you can see the level decrease in lower bass. But if you make the same sim at 10 meters, you see only a minor difference, because I think akabak just change gain from distance of the virtual mic measurement sim, and not from coupling. When the mic is at 10 meters, the difference path between speaker and port at 2 meters high is not very different, but if you put the mic at 1 meters, yes it makes a big difference. It's just geometry.
JJD, in your opinion at 1m using y tag, is that a good approximation of ground coupling? Did you get a better method? I'm just rember something in mighty dubpass thread.
This belongs on the brands and in what country you live. In England pd cost less than rcf, in Italy is the opposite. But to me the equation is a bit more complex,I mean the same driver driven with same watts how do it perform in a mini scoop or in double reflex (same external dimension)? Does the way of stacking affect so much the performances? Indoor or outdoor what is better and why? ...and we can continue for hours and we are for that smiley2
Gee136 wrote: .....Also the main factor was cost, check the equation: x1 PD 1850 in a decent scoop £700 as opposed to x2 XB's in a double box (Gsub) £450 enough said!!!
Gee136 wrote: My sound is a roots soundsystem, & we use double 18's, on our bass section (not a scoop in sight) for many years I've been in & around various roots sounds, most of them using scoops, when we built up our sound Goverment a few years ago, we decided that we wasn't going to transport a 4ft bass box with one driver in it, as opposed to two drivers!! Now this was for many reasons, one main reason that I've notice over the years is how deep a reflex box can play!! The ease of achieving our specified deepness without stressing the box (speakers ain't crying!! smiley36 ) Also the main factor was cost, check the equation: x1 PD 1850 in a decent scoop £700 as opposed to x2 XB's in a double box (Gsub) £450 enough said!!!
When we play out, more often than not, soundmen are surprised!! Now I'm saying that they are stupid, but what I've notice in the soundsystem game over the 26 years I've been following sounds, is that everybody follows everybody smiley36 !!! Only a tiny minority will do their own live testing & specification gathering (We did before we decided to build our sound) to assess what is required for them!! Oh and another thing, we play our soundsystem 2way through a pre amp!! Our set will stand up against any sound playing 5way, 4way or 3way!!!
As my Dad (RIP) used to say: experience over enthusiasm always prevails!!!!