2. reading from your mic to ur measurements software, either REW, HolmImpulse or Omnimic.
4. use your mic
5. same as 4
6. if you have 4 binding post, just jumper it + to + and - to -, then both drivers will play together.
4. use your mic
5. same as 4
6. if you have 4 binding post, just jumper it + to + and - to -, then both drivers will play together.
if you want, send me your FRD and tell me more about your speakers:
1. Baffle Size
2. CTC between woofer and tweeter.
To measure impedance, DATS is very useful or you can use REW with your soundcard, you have to read the manuals though as i dont use REW.
1. Baffle Size
2. CTC between woofer and tweeter.
To measure impedance, DATS is very useful or you can use REW with your soundcard, you have to read the manuals though as i dont use REW.
I don't have DAT to measure the impedance, I use Holm to measure the drivers frecuency response. What's FRD: frecuency response?
I can't attach the tweeter in box without filter zip because is 1Mb and diyA forum can support. Can I send you an email?
Last edited:
Are you sure your email si right?
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Last edited:
thats my address, please edit it, as spam can use it. whats ur email, ill email to u then u cab reply back
Received your email, what when answered still same Delivery Status Notification as recipient failed😕
Felipe, let me try this again.
First, it still looks like the measurement of your tweeter is not quite right yet. Graphs below:
1. Seas measurement
2. Zaph's measurement
3. your cabinet's baffle effects with the chamfer using BDS (note the very magnified scale)
4. what your measurement should more or less look like when 2 and 3 are combined
5. what your measurement actually look like
So you're showing a 5dB rise at 7k and about a 10dB rise at about 15k that probably shouldn't be there.
Secondly, besides Troels design with the 18W8545-00 that you already posted (attachment 6), Vance Dickason did a design with the 18W8545K0 (attachment 7) which although slightly different, has a very similar FR to the 18W8545-00. Each takes a different but equally valid approach to the the xo. Troels uses a combination of a smaller inductor (1.2mH) with an LCR contour filter that squashes the remaining peak at about 800-1000Hz to bring the SPL level down to about 84/85dB. Dickason elects not to use the contour filter and therefore uses a much larger inductor value (3mH) to bring the level at 800-1000Hz down to about 82/83dB to compensate a little more for baffle step loss.
Because you are trying to put a xo together with the limited number of parts that you already have, I am suggesting that you follow Dickason's approach here - I don't think you will have the values necessary to implement Troels' LCR contour filter as well as the rest of the xo.
So 1 more time, using PCD and your measurement of the 18W8545 on your baffle but spliced to a vented response below 300Hz with 6dB baffle step loss and graph 4's simulated response of your tweeter, attachment 8 is the xo that I previously suggested as a good starting point for you. Put it together and see how it sounds. The last graph shows the summed response. Place the speaker where you will have it normally playing and turn it up to normal listening levels. Run it in mono. If there is too much bass, we need to lower the inductor value to 2.7mH; if there is too much we need to raise it. Tweeter resistance may need to be tweaked as well. Measure it too and we can can all work on it but listen with your ears not just the microphone.
First, it still looks like the measurement of your tweeter is not quite right yet. Graphs below:
1. Seas measurement
2. Zaph's measurement
3. your cabinet's baffle effects with the chamfer using BDS (note the very magnified scale)
4. what your measurement should more or less look like when 2 and 3 are combined
5. what your measurement actually look like
So you're showing a 5dB rise at 7k and about a 10dB rise at about 15k that probably shouldn't be there.
Secondly, besides Troels design with the 18W8545-00 that you already posted (attachment 6), Vance Dickason did a design with the 18W8545K0 (attachment 7) which although slightly different, has a very similar FR to the 18W8545-00. Each takes a different but equally valid approach to the the xo. Troels uses a combination of a smaller inductor (1.2mH) with an LCR contour filter that squashes the remaining peak at about 800-1000Hz to bring the SPL level down to about 84/85dB. Dickason elects not to use the contour filter and therefore uses a much larger inductor value (3mH) to bring the level at 800-1000Hz down to about 82/83dB to compensate a little more for baffle step loss.
Because you are trying to put a xo together with the limited number of parts that you already have, I am suggesting that you follow Dickason's approach here - I don't think you will have the values necessary to implement Troels' LCR contour filter as well as the rest of the xo.
So 1 more time, using PCD and your measurement of the 18W8545 on your baffle but spliced to a vented response below 300Hz with 6dB baffle step loss and graph 4's simulated response of your tweeter, attachment 8 is the xo that I previously suggested as a good starting point for you. Put it together and see how it sounds. The last graph shows the summed response. Place the speaker where you will have it normally playing and turn it up to normal listening levels. Run it in mono. If there is too much bass, we need to lower the inductor value to 2.7mH; if there is too much we need to raise it. Tweeter resistance may need to be tweaked as well. Measure it too and we can can all work on it but listen with your ears not just the microphone.
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