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Hi all,
I am trying to design my next-gen upgrade for my super-sentra. My design goal is to have the best axis response possible throughout the frequency response range.
I was reviewing graphs and think I have a winning pair. First, I wanted the best midrange performer I could get that has at least a decent extention in flat response until the off-axis response starts crapping on it. Then I wanted a tweeter that could go low, real low and yet still have a very good extention before off-axis response is corrupted. Third, I wanted to keep the crossover point low enough to keep it out of the critical 2.5KHz - 6KHz range. Well, I think I have my combo.
The Scanspeak 12m 4.5 midrange:
http://www.tymphany.com/datasheet/printview.php?id=72
Please note that the off-axis response starts crapping out at around 2KHz. My plan is to eventually get a sound processor with a 48db/octave slope capability and use that to highpass this driver at 1.5KHz to help avoid the off-axis response problems above 2KHz.
Then we have the ADI (Tang Band) ceradome with an incredible response graph:
CeraDome Tweeter
You'll notice this tweeter can go low, real low. I plan to highpass this at 1.5KHz, again with the 48db/octave slope to avoid the rising distortion below this point as much as possible. Also, notice the off-axis response crapping out at 15KHz!!!! Wow. That's perfect.
With a proper A-pillar build, this should be a really nice combo that will give a really smooth response, even off-axis throughout the critical frequency ranges of 250Hz to 15KHz. That's some good chit mang.
What do you guys think of my plan?
I am trying to design my next-gen upgrade for my super-sentra. My design goal is to have the best axis response possible throughout the frequency response range.
I was reviewing graphs and think I have a winning pair. First, I wanted the best midrange performer I could get that has at least a decent extention in flat response until the off-axis response starts crapping on it. Then I wanted a tweeter that could go low, real low and yet still have a very good extention before off-axis response is corrupted. Third, I wanted to keep the crossover point low enough to keep it out of the critical 2.5KHz - 6KHz range. Well, I think I have my combo.
The Scanspeak 12m 4.5 midrange:
http://www.tymphany.com/datasheet/printview.php?id=72
Please note that the off-axis response starts crapping out at around 2KHz. My plan is to eventually get a sound processor with a 48db/octave slope capability and use that to highpass this driver at 1.5KHz to help avoid the off-axis response problems above 2KHz.
Then we have the ADI (Tang Band) ceradome with an incredible response graph:
CeraDome Tweeter
You'll notice this tweeter can go low, real low. I plan to highpass this at 1.5KHz, again with the 48db/octave slope to avoid the rising distortion below this point as much as possible. Also, notice the off-axis response crapping out at 15KHz!!!! Wow. That's perfect.
With a proper A-pillar build, this should be a really nice combo that will give a really smooth response, even off-axis throughout the critical frequency ranges of 250Hz to 15KHz. That's some good chit mang.
What do you guys think of my plan?