I'm seeking feedback from the community about the quality of my system based on my measurements, and if you can see opportunities for improvement.
4-way system:
dual 15" in compact enclosure, 20-115Hz, LR8
Dual 8" 115Hz-500Hz, LR8,
Coaxial 6.5" mid, 500Hz-2kHz, LR8
Coaxial 1" tweeter, >2kHz, LR8
Measurements are from my single (mono) tower speaker, microphone is near my listening position at 2m, tweeter level.
System equalized (roughly) to the target harman house curve. (actually sounds really nice to me).
Waterfall shows everything falls off by at least 30dB, inside of 250ms...including the 43Hz room mode.
Same system, but if the bass were equalized relatively flat, just to show decay rates in a "normalized" way.
I was told the excess group delay was a good parameter to optimize. This is what mine looks like after time aligning the drivers:
And here's the frequency / phase response(s)
Here are my "walk around the room" horizontal off-axis responses, 0-15-30-45-60-75 degrees, normalized to 15deg (15deg chosen as ref since tweeter has on-axis dip, but it doesn't offend off-axis). These were taken at 2m from the speaker, re-positioning the microphone throughout the room.
Here's some vertical off axis plots, taken at 2m from the speaker, without normalizing. A this distance, another 15deg up and I'd be on the ceiling...lol.
This is the best speaker I've designed acoustically (although it's a prototype and not currently pretty to look at). This is the first speaker I've designed where it's so consistent as I walk around the room. I'm wondering if Dirac Live would be able to make a noticeable improvement to this system? (I'm pretty happy with it thus far, but I'm also pretty new to Hi-Fi loudspeaker design)
I'd welcome the community's thoughts if there are noticeable improvements to make, and suggestions how to make them.
Cheers,
Brandon
4-way system:
dual 15" in compact enclosure, 20-115Hz, LR8
Dual 8" 115Hz-500Hz, LR8,
Coaxial 6.5" mid, 500Hz-2kHz, LR8
Coaxial 1" tweeter, >2kHz, LR8
Measurements are from my single (mono) tower speaker, microphone is near my listening position at 2m, tweeter level.
System equalized (roughly) to the target harman house curve. (actually sounds really nice to me).
Waterfall shows everything falls off by at least 30dB, inside of 250ms...including the 43Hz room mode.
Same system, but if the bass were equalized relatively flat, just to show decay rates in a "normalized" way.
I was told the excess group delay was a good parameter to optimize. This is what mine looks like after time aligning the drivers:
And here's the frequency / phase response(s)
Here are my "walk around the room" horizontal off-axis responses, 0-15-30-45-60-75 degrees, normalized to 15deg (15deg chosen as ref since tweeter has on-axis dip, but it doesn't offend off-axis). These were taken at 2m from the speaker, re-positioning the microphone throughout the room.
Here's some vertical off axis plots, taken at 2m from the speaker, without normalizing. A this distance, another 15deg up and I'd be on the ceiling...lol.
This is the best speaker I've designed acoustically (although it's a prototype and not currently pretty to look at). This is the first speaker I've designed where it's so consistent as I walk around the room. I'm wondering if Dirac Live would be able to make a noticeable improvement to this system? (I'm pretty happy with it thus far, but I'm also pretty new to Hi-Fi loudspeaker design)
I'd welcome the community's thoughts if there are noticeable improvements to make, and suggestions how to make them.
Cheers,
Brandon
