I've just finished off a build for a pro audio setup using 12" B&C coaxials for mains, 8" coaxials for monitors and an 18" sub. The system sounds great but definitely isn't suited to running at low volumes inside my lounge room😀. I did hook it up as a 4.1 surround system, nice cinema level sound, but im sure the neighbours didn't appreciate it and the amp noise (powersoft m28q and K3) was also far to load for normal listening levels.
Anyway, it's time to start a new project to keep myself busy.
I had been following this build and really love the concept:
Scanspeak 4 Way Active DSP Build with Illuminator/Revelator Drivers
Im looking for some advice on building a slightly scaled down version using 8/4/T/4/10" drivers in a single piece enclosure. Looking at the following drivers:
Tweeter: SB acoustics SATORI TW29RN-B-8
Midranges: 2x SB acoustics sb12mnrx2-25-4
Woofer: SB acoustics SB23NRXS45-8
Subwoofer: SB acoustics SB29NRX75-6
I have a minidsp 2x8 to run the crossovers and for the moment a Lab Gruppen C20:8x (8x 250w) to drive everything during testing. I would need to swap this out for a hifi amp, probably a Nord or KJF ncore 8 channel.
I have access to a CNC machine so would be using a translam construction. I originally made up a design with a front face that is cut separately:
Fusion
I will probably ditch the seperatefront face for simplicity.
Would love some feedback on the driver selection.
Anyway, it's time to start a new project to keep myself busy.
I had been following this build and really love the concept:
Scanspeak 4 Way Active DSP Build with Illuminator/Revelator Drivers
Im looking for some advice on building a slightly scaled down version using 8/4/T/4/10" drivers in a single piece enclosure. Looking at the following drivers:
Tweeter: SB acoustics SATORI TW29RN-B-8
Midranges: 2x SB acoustics sb12mnrx2-25-4
Woofer: SB acoustics SB23NRXS45-8
Subwoofer: SB acoustics SB29NRX75-6
I have a minidsp 2x8 to run the crossovers and for the moment a Lab Gruppen C20:8x (8x 250w) to drive everything during testing. I would need to swap this out for a hifi amp, probably a Nord or KJF ncore 8 channel.
I have access to a CNC machine so would be using a translam construction. I originally made up a design with a front face that is cut separately:
Fusion
I will probably ditch the seperatefront face for simplicity.
Would love some feedback on the driver selection.
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Played around a bit more with the cabinet shape and I think I have settled on drivers, although any comments welcome:
Fusion
It makes a 41L sealed cabinet for the SB23NRXS45-8 and an 83L vented box for the SB29NRX75-6 (less driver / port volumes etc.)
At least its going to look a lot more aesthetically pleasing then my last build:
B&C Coaxial Rig - Google Photos
Fusion
It makes a 41L sealed cabinet for the SB23NRXS45-8 and an 83L vented box for the SB29NRX75-6 (less driver / port volumes etc.)
At least its going to look a lot more aesthetically pleasing then my last build:
B&C Coaxial Rig - Google Photos
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41 liter for sealed 8" sounds crazy! Something around 10 perhaps, what are you planning for xo?
SB29 NRX is 10" so actually small as subwoofer, I think this desing is't balanced right
SB29 NRX is 10" so actually small as subwoofer, I think this desing is't balanced right
41 seamed large to me too but is at the lower end of the manufacturer recommended size for a sealed box (38-75L).
http://sbacoustics.com/wp-content/uploads/2020/02/8in-SB23NRXS45-8.pdf
The 10" sub is small, but I am restricted on space.
http://sbacoustics.com/wp-content/uploads/2020/02/8in-SB23NRXS45-8.pdf
The 10" sub is small, but I am restricted on space.
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Realised I had been modelling the sb29nrx75 instead of the sbswnrx-s75 in winISD. The sub is tuned to a much smaller cabinet 25-40L, not sure either the sub or the 8" woofer is suited for the cabinet size in the wmtmw form.
Entered a SEAS based system into winISD and had much better results using the L26ROY XM001-04 for a sub, the CA22RNY for the woofer and MCA12RC for kids. Undecided on the tweeter from seas.
Entered a SEAS based system into winISD and had much better results using the L26ROY XM001-04 for a sub, the CA22RNY for the woofer and MCA12RC for kids. Undecided on the tweeter from seas.
So, i am most of the way through re-modelling the cabinet.
Looking to be:
Mids: 2 X SEAS MCA12RC in a 6L sealed cabinet
Woofer: SEASCA22RNY in a 15L sealed cabinet
Sub: SEAS L26ROY XM001-04 in a 67L ported cabinet (100mm port / 56cm long - will need an elbow)
Still undecided on the tweeter, was looking at the SEAS 27TBCD/GB-DXT waveguide model.
Would love to hear from people that have used these drivers.
Looking to be:
Mids: 2 X SEAS MCA12RC in a 6L sealed cabinet
Woofer: SEASCA22RNY in a 15L sealed cabinet
Sub: SEAS L26ROY XM001-04 in a 67L ported cabinet (100mm port / 56cm long - will need an elbow)
Still undecided on the tweeter, was looking at the SEAS 27TBCD/GB-DXT waveguide model.
Would love to hear from people that have used these drivers.
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One advice: Use WinISD for any speaker that has no highpass in the crossover. Use more sophisticated software for other applications, even Basta! does better when you're using highpass.
Do you have any ideas about designing the crossover already? And about acquiring the response data needed for that?
Do you have any ideas about designing the crossover already? And about acquiring the response data needed for that?
Thanks, I'll take a look at Basta.
The crossovers will be active using a minidsp, so plenty of room for trial and error. Measurements will be more difficult as I only have one reference mic and do not have access to a treated room to do proper measurements in - although theres plenty of reasons to make new friends 😉.
The crossovers will be active using a minidsp, so plenty of room for trial and error. Measurements will be more difficult as I only have one reference mic and do not have access to a treated room to do proper measurements in - although theres plenty of reasons to make new friends 😉.