I am finally getting back to posting about my all HiVi tower build since the forum move. Here is a link to the previous forum.
Love that RT1.3WE tweeter! Here’s the measurements of one of mine I took this morning. 0, 15, 30, 45, and 60 degs:
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You have me curious - what’s the purpose of notch filter in the tweeter HP?
There was a pretty large bump in the 12k-15k region.
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Being the CR lifts top end, I wonder if the 2 filters could be consolidated.
That made a pretty system!
It REALY is a good looking alignment!
Reet, that is really close to what I have actually. For some reason in this build I have a weird top end bump and roll off with this tweeter. I have used it before and it was much flatter. I may have to play around with some felt and try to see what is causing it. Overall though, I am happy with the alignment. I have been listening to these and messing with the crossover for about 3 weeks. I am about to solder it up and think about veneer and paiint.
Bringing them to Iowa?
I was hoping to come to Iowa this year. I have been wanting to come to an event for a long time. My wife has to go to an appointment at the Mayo clinic that week for some heart issues, so it’s not looking good.
I don’t know what you use for measuring, but I would double check that the mic calibration was loaded. It’s unlikely for top octave lumps to be diffraction related, that stuff generally is focused on <6kHz frequencies. It is typical for mic calibrations to primarily affect the top end response however.
In the simplified filter circuit I provided above, you should be able to tune / voice the top end to taste by varying the resistor value.
This is what I measured. I am running an Omnimic, and I have the cal loaded, and just measured a Focal bookshelf for a friend, and it measured where we expected in the high frequencies.
I probably wouldn’t bother to try and “correct” that little bump, it likely provides some benefit considering narrowing directivity of all speakers in the top octave. Listen and enjoy, adjust crossover and/or EQ to taste if you don’t like it.
I did that at first. That is why there is the notch filter. It was a bit too much. I tried the notch, and liked it a lot more. They are still really detailed.
Awesome looking towers!!
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