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Patrik 
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Joined: 27 July 2006 Location: Sweden Status: Offline Points: 19 |
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 Posted: 04 May 2007 at 11:20am |
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I have taken some measurments. the angels given ar not exact, only aprox!! The microphone was placed 1m in front af the horn an then moved to the side by 20 cm increments.
 Was looking at the bms horn (the biggest 2") first. but they were very big and I hade these p.audio horns lieing around. I tested them and was satisfied with the result.
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soundsystemdan
Young Croc 
Joined: 04 April 2005 Location: Leeds UK Status: Offline Points: 716 |
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Posted: 05 May 2007 at 10:34am |
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That great Patrik, useful enough. using trirgonometry on your rough measurments means the blue line is about 30deg off axis, which is the stated -6dB point of that horn.
I think I'll split the budget between a cheaper 2" and a tweeter to cover 10KHz+. Thanks again. |
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soundsystemdan
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Joined: 04 April 2005 Location: Leeds UK Status: Offline Points: 716 |
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Posted: 05 May 2007 at 10:37am |
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oh btw, did you rotate the mic as you moved it sideways? (so it was still pointing directly to the horn)
or was it an omnidirectional or what? |
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Patrik
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Joined: 27 July 2006 Location: Sweden Status: Offline Points: 19 |
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Posted: 07 May 2007 at 1:43pm |
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Yes, the blue is about 30 deg. The mic is a behringer measurment mic. it is omnidirectional.
Should mention that i used a active crossover set at 6,3k, 24db, but, for this test. If you tinker with the crossover settings you could get a litte flatter response in the 5k area.
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Tekasis
Old Croc 
Joined: 03 July 2006 Status: Offline Points: 6492 |
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Posted: 10 September 2007 at 9:09am |
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Got a few brief questions:
1) Is there anyone who's tried this ? Sounds like a good idea then just strap them down.
2) Is there an advantage of having the comp in between the two 12''s instead of on top ?
3) I see most use Neo 12'' mid drivers, any preferred ferrite 12's that would work effectively in these MT122's despite the extra weight ?
Cheers.
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Mark James
Old Croc
Joined: 15 January 2006 Location: rig side Status: Offline Points: 5306 |
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Posted: 10 September 2007 at 3:38pm |
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i believe the reason that the comp was mounted in between the 12s on the original mt122 was because vocals/most mid sounds play up to say at least 3khz, so putting the comp which plays some of these frequencys in between so even though a given sound is split between two drivers [comp and 12] it at least comes from the same/similar place, so that it is in phase.
ok thats a lame answer but it does make sense..... |
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insert silly sentence here
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Tekasis
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Joined: 03 July 2006 Status: Offline Points: 6492 |
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Posted: 11 September 2007 at 10:26pm |
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Sounds good! - You could be right. Cheers.
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Heathrow_B_line
Old Croc
Joined: 11 January 2006 Location: United Kingdom Status: Offline Points: 7339 |
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Posted: 12 September 2007 at 3:38pm |
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i would think they were design like that is to minise comb filtering. if you have a look at the plan you will also see that the horizontal flare is kept quite acute compared to the veritcal flare.
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Produce a killer sound. Take no prisoners.
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adambomb
Old Croc
Joined: 10 April 2006 Location: United Kingdom Status: Offline Points: 3220 |
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Posted: 13 September 2007 at 11:01am |
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HBL knows.
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Sequence Empire:::..
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Joined: 13 January 2009 Location: New Zealand Status: Offline Points: 84 |
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Posted: 19 March 2009 at 9:19pm |
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What brand/model HF Flare is this? Like the look of it for my MT121 Build... Cheers |
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heinrich
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Joined: 21 February 2007 Location: Calindagan Status: Offline Points: 280 |
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Posted: 20 March 2009 at 1:37am |
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so when do they start to comb filter? maybe at 900hz or approximately over the crossover point, let's say for example: if the 12's are placed together one over the other and the 2" is atop the other 12" so by this arrangement the other 12" the one below most will comb filter against the 2" which is at the top most side..... meaning there would be some anomalies at crossover point............? well only between lowest 12" and the 2" atop...... ??? Edited by heinrich - 20 March 2009 at 1:38am |
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.....power is nothing without control....
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Patrik wrote: