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I introduce The Cathedrals.
They are an all sealed, active design. They are in the concept and planning stage but comprise the following:
1 x Dayton RSS390HF-4 15" aluminium woofer
1 x SB Acoustics SB17NBAC-4 6" aluminium as a midrange
1 x SB Acoustics SB26ADC 1" aluminium dome tweeter
The SB26ADC may be waveguide loaded, if the profile of the Visaton WG148R is suitable.
Current crossover points are ~ 200hz and ~1900Hz.
What I wanted over my current 3 ways:
- Larger woofer. a 15" should move enough air.
- Lower F3. The Dayton models ~32Hz in a 124L sealed enclosure. There's enough xmax and with an active crossover I can tailor the in-room response with xmax to spare.
- Modular. I want to separate bass and mid/tweeter sections... such that I can replace mid-tweeter or have different options with the RSS390 filling in bass duties
- Wanted to try a waveguide. This may not work in practice. I have a plan B if that is the case.
- Try an active crossover. This will be using a Raspberry Pi, running ecasound LADSPA host and credit to Charlie Laub's Active Crossover Design tools to provide the ecasound filters.
- An all metal design
The relative phase graphs show the phase difference between driver pairs. I'm trying to get these <= 15 degrees at least 2 octaves either side of the XO points. More work required
They are an all sealed, active design. They are in the concept and planning stage but comprise the following:
1 x Dayton RSS390HF-4 15" aluminium woofer
1 x SB Acoustics SB17NBAC-4 6" aluminium as a midrange
1 x SB Acoustics SB26ADC 1" aluminium dome tweeter
The SB26ADC may be waveguide loaded, if the profile of the Visaton WG148R is suitable.
Current crossover points are ~ 200hz and ~1900Hz.
What I wanted over my current 3 ways:
- Larger woofer. a 15" should move enough air.
- Lower F3. The Dayton models ~32Hz in a 124L sealed enclosure. There's enough xmax and with an active crossover I can tailor the in-room response with xmax to spare.
- Modular. I want to separate bass and mid/tweeter sections... such that I can replace mid-tweeter or have different options with the RSS390 filling in bass duties
- Wanted to try a waveguide. This may not work in practice. I have a plan B if that is the case.
- Try an active crossover. This will be using a Raspberry Pi, running ecasound LADSPA host and credit to Charlie Laub's Active Crossover Design tools to provide the ecasound filters.
- An all metal design
The relative phase graphs show the phase difference between driver pairs. I'm trying to get these <= 15 degrees at least 2 octaves either side of the XO points. More work required
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