Author Topic: The Monolith open baffle planar array  (Read 2476 times)

Offline HAL

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Re: The Monolith open baffle planar array
« Reply #45 on: January 07, 2018, 02:16:40 PM »
Rich,
Here is my prototype of The Monoliths.  The open baffle planar section will probably change, but good enough to start the full design.  They will be mirror image pairs. 

Offline richidoo

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Re: The Monolith open baffle planar array
« Reply #46 on: January 07, 2018, 07:44:52 PM »
Oh yeah, I remember those.

Boy the Neo10 is huge!  I don't know why I thought it was smaller, but never seen it in context like that your picture. That's what you need to get down to 200Hz.

What's the advantage of measuring with ground plane mic?
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Offline HAL

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Re: The Monolith open baffle planar array
« Reply #47 on: January 07, 2018, 08:01:17 PM »
For subs it minimized room effects on measurements.  Should really be a hard surface for the mic for it to work correctly.  That was to test the system was working and it is.

Did a nearfield measurement of the upper woofer to check and it works, so Room EQ Wizard at 24bit/192KHz will now be a standard install for dspMusikLCD systems on the MS-3.  Very simple measurement suite to help dial in a system using the same hardware as the crossover.




Offline HAL

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Re: The Monolith open baffle planar array
« Reply #48 on: January 08, 2018, 06:36:58 PM »
The second 2x12 H-Frame is loaded with servo drivers and ready for wiring.

Offline HAL

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Re: The Monolith open baffle planar array
« Reply #49 on: January 09, 2018, 07:08:28 AM »
Wiring done and tested.  Both subs are done and working!



Offline HAL

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Re: The Monolith open baffle planar array
« Reply #50 on: January 11, 2018, 11:53:46 AM »
My HX300-8OB sub amps are off to Rythmik Audio to be moded to HX300-12OB for the 2x12 use.  The EQ for the open baffle changes significantly between the two size drivers.

Hope to have them back late Jan for use.

Offline HAL

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Re: The Monolith open baffle planar array
« Reply #51 on: January 19, 2018, 04:43:05 AM »
The update from Rythmik Audio today is they have received the HX300-8OB for mod to HX300-12OB and should be completed and shipped by Monday.

Should have them next week and start new measurements to complete the dspMusikLCD digital crossover design.



Offline rollo

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Re: The Monolith open baffle planar array
« Reply #52 on: January 19, 2018, 10:34:15 AM »
Cool stuff Hal keep it coming.


charles
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Offline HAL

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Re: The Monolith open baffle planar array
« Reply #53 on: January 19, 2018, 12:29:14 PM »
Hoping for some massive news next week!  This should be interesting!   :thumb:

Offline HAL

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Re: The Monolith open baffle planar array
« Reply #54 on: January 20, 2018, 07:45:11 AM »
Have a pair of Parasound Halo A23 stereo amps ready for the open baffle planar top when the HX300-12OB amps arrive for a triamp setup with the dspMusikLCD digital crossover being used with the MS-3 for the entire system to run The Monoliths.  The A23's sound great with the line arrays, so going in this system for trials as well.

The dspMusikLCD will allow time alignment of the top baffle and sub drivers using time delay for the top to match the subs.  This allows both wavefronts to align correctly. 

Still more news next week.   :D

Offline Nick B

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Re: The Monolith open baffle planar array
« Reply #55 on: January 20, 2018, 08:42:13 PM »
Have a pair of Parasound Halo A23 stereo amps ready for the open baffle planar top when the HX300-12OB amps arrive for a triamp setup with the dspMusikLCD digital crossover being used with the MS-3 for the entire system to run The Monoliths.  The A23's sound great with the line arrays, so going in this system for trials as well.

The dspMusikLCD will allow time alignment of the top baffle and sub drivers using time delay for the top to match the subs.  This allows both wavefronts to align correctly. 

Still more news next week.   :D


Rich,
Regarding the time delay aspect, does the software make the adjustment automatically or do you do it manually?
What time frame would that usually be? Is this measured in milliseconds?
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Offline HAL

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Re: The Monolith open baffle planar array
« Reply #56 on: January 21, 2018, 08:01:55 AM »
Nick,
There is a delay built in to offset the head sitting.on the sub. 

It is a fraction of a millisecond.  Actually measured in time samples.  The resolution is 0.071" for.each time sample.  It can be modes when programmed, but at this time not user adjustable.  There is software in work for updates by the user.  That is tbd.

Offline HAL

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Re: The Monolith open baffle planar array
« Reply #57 on: January 30, 2018, 06:41:59 PM »
The Rythmik Audio HX300-12OB servo amps arrived today and now installed with the subs.

Tomorrow will be testing with the dspMusikLCD 2x8 and see what happens.

Offline HAL

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Re: The Monolith open baffle planar array
« Reply #58 on: January 31, 2018, 07:02:10 AM »
The HX300-12OB servo amps are up and running with the 2x12 H-Frame subs.  With pink noise, they make some very nice low frequency rumble and broadband bass, but no boom. 

Offline rollo

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Re: The Monolith open baffle planar array
« Reply #59 on: January 31, 2018, 11:49:36 AM »
Excellent Hal. My bet better than the mega four or six pack pack per side.


charles
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Lamm - Aqua Acoustic Formula & La Scala DAC- INNUOS  - Rethm Speakers - PI Audio Uberbuss - Triode Wire Labs- Kuzma - Furutech - Audio Hungry Qualiton - Fritz Carrera speakers -Gigawatt