Can martin 215 mk3 or f2b keep up with es18 or usb

Isn't the quite well respected Martin WSX horn slot loaded too?

Or is the fact it's folded and therefore bandwidth limited in its favour in keeping the nastiness out of the sound?

I think compression is worst on mid high definately

The bms drivers have different compression ratios, I use 4538 / 4540nd and like them very much, they're tiny & not that powerfull talking watts, but the sensivity is high!
The compression is pretty low for a 1" driver, the diaphragm is 1,5" (38mm) 1:2,25
I found that I liked this by ear, later comparisons showed me that they have a lot less compression above 4 khz than other drivers.
I use mine only above 4 khz, hitting full power above 5khz.

But still has nothing to do with the kick compression, I like martin audio 215, I also like the xtro kick, which is straight, but won't go as low, guess it has less compression too.

So anyone up for designing a kick?
Perhaps the compression is a part of what makes them so popular


Edited by tv00 - 20 November 2014 at 6:34pm

Why ask them? It's so easy to calculate, unless theres something in the front chamber / phaseplug in the driver that I'm no aware of.
The diaphragm is 1,5"
The throat is 1"
the area of a circle is pi x radius^2
So I would say the compression must be:
pi x 0,75^2 / pi x 0,5^2

You're starting to make sense to me, I work with low distortion in high/mid and play adjust it to play loud with no earplugs & no tinnitus.
The bms 4538 have a polyester diaphragm, are you saying that you use a different one? I wish they would sell 4538 16 ohm!

Nevertheless we should stick within the topic: kickcompression


Edited by tv00 - 20 November 2014 at 7:06pm

jazomir wrote: And to think in another thread that people thought that Danley Jericho systems were too big to handle even for big events. Wonder how long this lot would have taken to rig, how many people were needed and what the whole thing weighs. Oh, and how many cranes and/or fork lifts were used? Bet it was loud, though!

This job was in 1990, things were done differently in them days!

There were chain hoists to get the speakers onto the platforms, boxes were hoisted in pairs. Then stacked and positioned by the array designer (me) and 4 local crew (with 2 more landing the boxes and feeding them to the stackers). Obviously you can do the ground stacks and the opposite side concurrently, if you have the people and an accurate system plan.

The staging was built from May 28th to 30th. Lights loaded in on the 31st.
Sound crew were called for 1400 on May 31st to load in and start rigging the main stacks. The next day was a full sound fitup / rigging day to finish the PA build and test the system.
June 2nd was soundcheck day, final rig tuning then bands and a camera rehearsal.
Show day was June 3rd. There was stuff going on all day but the bands performed from 1945 to 2330. Towards the end of the evening there were, according to press reports, about a quarter of a million people in the audience.
The next day was allocated for technical strike and loadout, I can't remember when it finished but typically these things derig a lot quicker than you might expect. Probably around mid-day.

Show timings had to be spot on as it was going out live on Channel 4 TV. There was a panic when the Stage Manager called the start of the show on his GP300. He was standing next to the stage power distro, and that's when we found the RCD's could be tripped by RF...
This being 1990, of course some of the bands had loads of keyboard kit that had to be reset and re-loaded from disk after the power was restored. Meanwhile, I'm sure the people in the TV scanner were having a lovely time...

Here's a set of pictures taken from the top deck. These were taken during the early evening before the field really filled up with people. You can see the SL Lx tower, with a bit of the SL audio delay tower just visible behind it, FOH, the SR audio delay and the SR Lx tower. FOH ws about 50m from stage, and the field delays 100m.
http://www.spamabyss.net/pictures/BDcrowd2.jpg



Edited by madboffin - 20 November 2014 at 10:48pm

Whilst we are discussing Horns here May i ask a Question relating to Hornresp which I have no need of so have never used.

does it take into account any objects placed within the Horn?

Just formidable that's gotta be my fave photo of the F2 Kyle