12"+8"+1" Mid/High Plan |
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bmf2
Registered User Joined: 04 November 2007 Location: United States Status: Offline Points: 68 |
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Posted: 16 January 2008 at 3:29am |
Been working some more on a previous mid/high idea and thought I'd get some opinions.
B&C 12PE32 12"
Eminence Alph 8MRA 8"
Selenium D210TI 1" (crossed at 3.5K)
90 X 40 Rotatable Comp Horn
Plan on making a removable filler panel for the 8" to reduce the coverage angle when arrayed. Just plug in the panels and rotate the horn. Dispersion of the lower freq is somewhat of a compromise but shouldn't be as noticable in that range.
Heres the box
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You say it's too loud-I say your hearing is too good
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Mark James
Old Croc Joined: 15 January 2006 Location: rig side Status: Offline Points: 5309 |
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one question.... why not use the 8pe21?????
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me so horny me love you long throw
horn loaded for her pleasure |
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mylesound
Registered User Joined: 08 August 2007 Status: Offline Points: 351 |
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lol i was thinking about something like that.
but to make it simple i was going to use the 8" section from the Xtro and do a simple reflex 15" with a 1" on top wasnt sure if that was a good idea so it kinda died in my mind. i think you have something going. almost like a compact solution to the Xtro. how low do you think it will go? |
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djstefanos
Old Croc Joined: 18 November 2005 Status: Offline Points: 2355 |
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how about making a skeleton. sort of like the JBL HLA touring series. Looking at that its a heck of a heavy cabinet and waste of space.
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Mark James
Old Croc Joined: 15 January 2006 Location: rig side Status: Offline Points: 5309 |
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nice idea though yeah, whats the crossover point between 12 and 8?
youve got to 3.5k with an 8mr???? fair play!!! nice idea! |
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me so horny me love you long throw
horn loaded for her pleasure |
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bmf2
Registered User Joined: 04 November 2007 Location: United States Status: Offline Points: 68 |
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The main reason for the alpha over the b&c is price. I can buy these alphas for $30! The 8pe21 will cost me right at $100. The second reason is the closed back simplifies construction. I'm not sure how low it will play. The lower section is the same as a mt122. I need to get to 150hz so I'm not real confident of this part. I thought Super's 1 X 12" might fit this better. Maybe he could PM me the specs?
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You say it's too loud-I say your hearing is too good
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bmf2
Registered User Joined: 04 November 2007 Location: United States Status: Offline Points: 68 |
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djstefanos,
The mid/high cabinets we are using now have two horns, an 8", and a 15" so I don't think the guys will make any complants about the weight.
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You say it's too loud-I say your hearing is too good
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mylesound
Registered User Joined: 08 August 2007 Status: Offline Points: 351 |
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if weight is not a problem why not just go for the xtro?
lol |
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Mark James
Old Croc Joined: 15 January 2006 Location: rig side Status: Offline Points: 5309 |
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good point!!!
the mt122 12" should be fine down to 120hz |
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me so horny me love you long throw
horn loaded for her pleasure |
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bmf2
Registered User Joined: 04 November 2007 Location: United States Status: Offline Points: 68 |
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Mark, According to B&C the 12 will play all the way up to 2K smoothly. I have no intention of running it anywhere near that high. I will probably use some trial and error with an rta to find the best crossover point. The 8" starts to fall off right about where I want to cross it. It does have a dip at about 2K. |
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You say it's too loud-I say your hearing is too good
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bmf2
Registered User Joined: 04 November 2007 Location: United States Status: Offline Points: 68 |
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If the mt122 design is good down to 120hz I'll stick with this design as it will be simple to build.
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You say it's too loud-I say your hearing is too good
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Mark James
Old Croc Joined: 15 January 2006 Location: rig side Status: Offline Points: 5309 |
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mt121 isnt that easy but hey, how low can you get the 8" down to and still play up to 3khz???
might like to see the 8" plans lol..... |
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me so horny me love you long throw
horn loaded for her pleasure |
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