The Monolith open baffle planar array

[HAL]

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.

[HAL]

The second 2x12 H-Frame is loaded with servo drivers and ready for wiring.

[HAL]

Wiring done and tested.  Both subs are done and working!

[HAL]

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.

[HAL]

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.

[rollo]

Cool stuff Hal keep it coming.


charles

[HAL]

Hoping for some massive news next week!  This should be interesting!   

[HAL]

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.   

[Nick B]

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.   

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?
Nick

[HAL]

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.

[HAL]

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.

[HAL]

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. 

[rollo]

Excellent Hal. My bet better than the mega four or six pack pack per side.


charles

[HAL]

Oh, the 6x12's working correctly will easily outperform the 2x12's.  They need to be on concrete though for structural reinforcement. 

[HAL]

Next stage of the testing.  Add the OB planar top and see how it works.

The dspMusikLCD 2x8 crossover it working and now to make some new measurements with CLIO Pocket.