At t-linespeakers.org the PLLXO calculator is showing capacitor values in nano-farad andwhen converting it to micro-farad the values becoming so small and not available in commercial sites.
Is the worksheet updated and what to do in case the required micro- farad value is too small and not available??
Is the worksheet updated and what to do in case the required micro- farad value is too small and not available??
I was using the link in the t-linespeaker.org site to calculate component values for a PLLXO. My target is 300 hz for a 1 st order high pass and low pass. My question is to get a flat frequency response and to avoid a bump at the crossover point, do I need to choose different low pass ( e.g. 220 hz) and high pass (e.g. 314 hz ) crossover calculation or it is already factored in the calculation formula provided in site mentioned?
Can you be more precise please? If i choose a 300hz crossover point, should i put 300 hz in the calculation pf both low pass and high pass filter? If not then what should be the ideal frequencies in low pass and high pass section in order to get a crossover point of 300 hz and also a almost flat frequency response?
This depends on where your drivers are playing at 300Hz. Is there already some rolloff that you are going to add to using these filters? Maybe your drivers are down 3dB already or are they flat?
From the free air frequency response graphs, both the drivers are almost Playing at 90 db at 300 Hz. My drivers are Markaudio Alpair 7 ms and Peerless 830869 woofer.
Your crossover point is uncertain at this point.
The Peerless looks easy to deal with.
The Alpair has a 3dB/octave rise below 300Hz which will confound your attempt to bring it down first order. There may be a baffle related rise above 300Hz as well.
One possible method of dealing with both of these is to use a higher Q second order filter. At line level you could use an inductor, or you could bring the highs down with an RC.
Do you use equalisation?
The Peerless looks easy to deal with.
The Alpair has a 3dB/octave rise below 300Hz which will confound your attempt to bring it down first order. There may be a baffle related rise above 300Hz as well.
One possible method of dealing with both of these is to use a higher Q second order filter. At line level you could use an inductor, or you could bring the highs down with an RC.
Do you use equalisation?
No i don't intend to use equalization. If 2nd order filter is used for high pass section and 1 st order is used in case of low pass, do you think it will work? How about if I use Alpair 5.3 in place of Alpair 7ms. Here is the spec sheet of Alpair 5.3
I have an idea. Maybe the best way to answer this is to ask someone who has worked with this driver. Because your speaker will be a (FAST/WAW) how would you feel about moving this question to the full-range forum?
Yes if that helps then why not. But i really don't know how to do that..can you do it for me please?
Thread split and moved here.