Hi there!
I am building my first diy speaker and its all quite new to me.
Plan is simple:
- Computer based dsp active speaker with power amps
- Rme multiface ufx 8 channels as da
- 3 way, 15"woofer + 5" mid + 1"cd xt1086 horn
- Crossover frequency 400Hz and 1800Hz (and up)
- 18sound nsd1095 + xt1086 horn i already have
Been thinking about 5" midrange for example b&c 5mdn38
My question is how does that fit with the xt1086´s directivity which is 60 degrees at 1800Hz ?
I am confused about different drivers in the same size category having different directivity. Is it so?
Any other suggestions for a midrange 5" or max 6,5" that fits perfectly with the xt1086. I can always cross higher if needed.
Thanks in advance!
I am building my first diy speaker and its all quite new to me.
Plan is simple:
- Computer based dsp active speaker with power amps
- Rme multiface ufx 8 channels as da
- 3 way, 15"woofer + 5" mid + 1"cd xt1086 horn
- Crossover frequency 400Hz and 1800Hz (and up)
- 18sound nsd1095 + xt1086 horn i already have
Been thinking about 5" midrange for example b&c 5mdn38
My question is how does that fit with the xt1086´s directivity which is 60 degrees at 1800Hz ?
I am confused about different drivers in the same size category having different directivity. Is it so?
Any other suggestions for a midrange 5" or max 6,5" that fits perfectly with the xt1086. I can always cross higher if needed.
Thanks in advance!
XT1086 directivity is 80 degrees horizontal (60 vertical). It is a good match for a 10" midrange crossed at around 1300 Hz. Search for 'Econowave' + 'XT1086' to find more information about similar designs and imagine they have an additional 15" woofer.
A 5 to 6.5" midrange does not match the dispersion of the horn, unless you cross over at a high frequency. A high crossover point to a 'small' (smaller than 10") midrange reduces the frequency range over which the horn operates, at which you obtain a constant directivity. Below the crossover, the patten will widen: all cone drivers have a wide dispersion at low and narrow at high frequencies. The transition between these lies at a higher frequency for smaller drivers. Unless you are building a PA speaker, the reduced power handling of a horn crossed at a 'low' (1300 Hz) frequency is not likely to be a problem.
A 5 to 6.5" midrange does not match the dispersion of the horn, unless you cross over at a high frequency. A high crossover point to a 'small' (smaller than 10") midrange reduces the frequency range over which the horn operates, at which you obtain a constant directivity. Below the crossover, the patten will widen: all cone drivers have a wide dispersion at low and narrow at high frequencies. The transition between these lies at a higher frequency for smaller drivers. Unless you are building a PA speaker, the reduced power handling of a horn crossed at a 'low' (1300 Hz) frequency is not likely to be a problem.
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Thanks a lot from these,
Couple of questions:
How can i calculate crossover frequency that matches xt1086 directivity of 5" mid or 6.5" mid? I am quessing 6.5" 2500Hz-3000Hz and 5" 3000Hz -3500Hz
Will i lose something with nsd1095+xt1086 from crossing so high (3KHz)? At least i could follow the "No crossover in the midrange 400Hz - 3kHz"- rule
Couple of questions:
How can i calculate crossover frequency that matches xt1086 directivity of 5" mid or 6.5" mid? I am quessing 6.5" 2500Hz-3000Hz and 5" 3000Hz -3500Hz
Will i lose something with nsd1095+xt1086 from crossing so high (3KHz)? At least i could follow the "No crossover in the midrange 400Hz - 3kHz"- rule
Those crossover points will work. Can always mess around with it and compare one to another with presets. Crossing that high won't be problem except for maybe a narrower listening window.
This is a bit unorthodox but I would recommend trying the compression driver directly mounted behind the baffle as well. There are no perfect answers when it comes to directivity preferences.
I've messed around with horns and waveguides for years and have recently found a strong preference for non waveguide/horn setups. Prosound based of course.
This is a bit unorthodox but I would recommend trying the compression driver directly mounted behind the baffle as well. There are no perfect answers when it comes to directivity preferences.
I've messed around with horns and waveguides for years and have recently found a strong preference for non waveguide/horn setups. Prosound based of course.
Directivity has been extensively discussed before, I would recommend to use the search function. 'No crossover in the midrange' is at least partially related to directivity.
Troels Gravensen "The Loudspeaker" uses
1300Hz crossover between
18 Sound XT1086
18 Sound NSD1095N
----
10NDA610 10" midrange
The-Loudspeaker
1300Hz crossover between
18 Sound XT1086
18 Sound NSD1095N
----
10NDA610 10" midrange
The-Loudspeaker
I recommend to forget "rules" like No crossover in the midrange and learn more about directivity matching. You have too big horn for 5" or 6" mid.
I would take smaller horn and good 8" mid (for example 18sound 8M400) with 15" woofer.
I would take smaller horn and good 8" mid (for example 18sound 8M400) with 15" woofer.
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