Hi everyone,
Greetings from India. I am planning to build a 3 way speaker in which mid duties will be assigned to a dome midrange. Here only HiVi dome midrange drivers are available as of now and the driver models are HiVi DM7500 and HiVi DMN-A. Here are the links
https://www.parts-express.com/HiVi-...kFDpp9Zt0DNCKtMdpMJ9iVvmUxueAuqZ_uUllAlHjICmS
https://www.parts-express.com/HiVi-...KycU3BsC9FgpnAl8C9StqGE6gZJmukcXDgBdoWn2qz0JK
The woofer duty will be assigned to SB 23NRXS-45 -8. Cabinet volume will be around 38-40 liters tuned to 35-40 hz. Here is the link to the woofer
https://sbacoustics.com/product/8in-sb23nrxs45-8-norex/
For high frequencies, I have two textile dome tweeters in mind. Both are Wavecor tweeters( Wavecor TW022WA05 and TW030WA07). Reasons behind choosing them are good frequency response, nice off-axis behaviour and low distortion. I also have SB29RDAC with me which I bought previously. Here are the links to the tweeters
https://www.wavecor.com/html/tw022wa05.html
https://www.wavecor.com/html/tw030wa05_to_08.html
https://sbacoustics.com/product/sb29rdac-c000-4/
I have planned to cross the midrange with the woofer at around 700-800 hz ( which might be needed to be stretched around 1000 hz in case of HiVi DMN-A). The midrange to tweeter crossover point will be around 4000-4500 hz.
What are the difficulties which may come in case of dome midrange and crossing it over with the woofer and tweeter? My tonal preference is warm detailed midrange and smooth detailed highs. Please help me with your experiences and suggestions which will be much appreciated. Thanks in advance.
Greetings from India. I am planning to build a 3 way speaker in which mid duties will be assigned to a dome midrange. Here only HiVi dome midrange drivers are available as of now and the driver models are HiVi DM7500 and HiVi DMN-A. Here are the links
https://www.parts-express.com/HiVi-...kFDpp9Zt0DNCKtMdpMJ9iVvmUxueAuqZ_uUllAlHjICmS
https://www.parts-express.com/HiVi-...KycU3BsC9FgpnAl8C9StqGE6gZJmukcXDgBdoWn2qz0JK
The woofer duty will be assigned to SB 23NRXS-45 -8. Cabinet volume will be around 38-40 liters tuned to 35-40 hz. Here is the link to the woofer
https://sbacoustics.com/product/8in-sb23nrxs45-8-norex/
For high frequencies, I have two textile dome tweeters in mind. Both are Wavecor tweeters( Wavecor TW022WA05 and TW030WA07). Reasons behind choosing them are good frequency response, nice off-axis behaviour and low distortion. I also have SB29RDAC with me which I bought previously. Here are the links to the tweeters
https://www.wavecor.com/html/tw022wa05.html
https://www.wavecor.com/html/tw030wa05_to_08.html
https://sbacoustics.com/product/sb29rdac-c000-4/
I have planned to cross the midrange with the woofer at around 700-800 hz ( which might be needed to be stretched around 1000 hz in case of HiVi DMN-A). The midrange to tweeter crossover point will be around 4000-4500 hz.
What are the difficulties which may come in case of dome midrange and crossing it over with the woofer and tweeter? My tonal preference is warm detailed midrange and smooth detailed highs. Please help me with your experiences and suggestions which will be much appreciated. Thanks in advance.
There are three things at least.
With passive crossover the peak at resonance reduce the slope of the crossover (can be fixed by inpedance corrections)
Try crossing over at 1.5 the resonance frequency so 1200 or 500 Hz for the 2" and 3" dome respectively
The small size of the domes compared to midrange cones (4"-5") make them have both a wider radiation pattenrn than a cone and the tend to run out of steam at their low range.
The crossover will not work if you use a textbook one. Try simulation software like Xsim and find out how tricky it is beforehand!
This is the fun part of this hobby...
With passive crossover the peak at resonance reduce the slope of the crossover (can be fixed by inpedance corrections)
Try crossing over at 1.5 the resonance frequency so 1200 or 500 Hz for the 2" and 3" dome respectively
The small size of the domes compared to midrange cones (4"-5") make them have both a wider radiation pattenrn than a cone and the tend to run out of steam at their low range.
The crossover will not work if you use a textbook one. Try simulation software like Xsim and find out how tricky it is beforehand!
This is the fun part of this hobby...
Yes definitely the drivers will be measured after mounting them on the baffle of the enclosure and then I have plans to simulate in vituixcad. Thanks for your response.
surprised that these are not available to you ? https://www.indiamart.com/peerless-fabrikkerne/raw-drivers.html#9433850291 they list both a fabric and metal dome
The HiVi DM7500 is pretty nice. (I'm sure the 2" is too, but haven't heard it directly.) It can crossover as low as 500 Hz (if you really need it to), I crossed it over around 680Hz to a Dayton Audio RS225P-4 10" woofer. It probably needs to crossover to the tweeter around 3.5kHz or lower but that shouldn't be a problem for the tweeters you are considering.
The listed sellers are not very reputable source to procure authentic drivers. In India, Electrocarts.in sells peerless drivers and they don't list the drivers that you mention.
Thank you for your response. How is the frequency response and details retrieval? I was reading about the same driver in Midwestaudioclub and found that the experienced builder who also built a 3 way with an 8 inch woofer, didn't find it easy to work with. Which order crossover you used while crossing it to the Dayton woofer? Does it need any impedance correction near the fs while crossing it to the woofer?
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Some midranges for recreational/home speakers are a love/hate relationship so be careful. Most recent recordings will sound pretty bad and many older recordings made during the productivity era will also.
I’ve used many midrange equipped studio monitor for decades and while the forward ( I call it poking) presentation is great for analyzing phase and timbre, it’s fatiguing or tiresome over time. At home when I want to enjoy music for pleasure and relaxation, I prefer the configuration of an 8” woofer crossed low to a robust dome tweeter. I don’t listen above 95 db at home so this alignment is never an issue. It also allows from a financial standpoint to re purpose the midrange costs and crossover components to a high end tweeter such as Scanspeak, Satori or Seas.
I would add the midrange domes are the BEST choice for home theater and center channel applications though……….mix decisions are often made with location and soundstage in mind and mid domes do very well in this regard.
I’ve used many midrange equipped studio monitor for decades and while the forward ( I call it poking) presentation is great for analyzing phase and timbre, it’s fatiguing or tiresome over time. At home when I want to enjoy music for pleasure and relaxation, I prefer the configuration of an 8” woofer crossed low to a robust dome tweeter. I don’t listen above 95 db at home so this alignment is never an issue. It also allows from a financial standpoint to re purpose the midrange costs and crossover components to a high end tweeter such as Scanspeak, Satori or Seas.
I would add the midrange domes are the BEST choice for home theater and center channel applications though……….mix decisions are often made with location and soundstage in mind and mid domes do very well in this regard.
The SB 23 NRX is really a subwoofer not a woofer.it will not extend high enough to integrate well with a dome mid.Terrible sounding thing in my experience.
Well it is listed in SB acoustic website as a woofer and here is the measurement at Hificompass. Please have a look...
https://hificompass.com/en/speakers/measurements/sbacoustics/sb-acoustics-sb23nrxs45-8
Thank you for your views. Audio is very subjective and preferences differ. Studio monitors are intended for mixing and mastering purposes.. Still I will consider the points you mentioned.
It is probably OK for use below 200hz.But even there I suspect it will sound slow and have a "one note" type sound.A lot of modern woofers sound like that I suppose.Too much excursion,too heavy,too low FS.Built like subwoofers not woofers.
The sound quality is very nice and detailed. The builder at Midwest Audio Club liked the tweeter quite a bit, but yes it is probably harder to work with than a smooth 5 inch cone woofer.
I used something close to 4th order acoustic slopes. I did not do anything with regards to adjusting impedance around Fs but I crossed pretty high. I'm pretty sure the designer on MAC did, but he was also crossing over lower (around 500Hz if I remember correctly).
What is the reason behind ? The measurement clearly shows linear frequency response atleast upto 1200-1500 hz.
That's really informative. If there's no problem, will you please share the crossover schematics? You may omit the values of the components used.
The reason is that is how they sound.Measurements have nothing to do with it.
You might like to investigate the Paul Kittinger designed Vianadi which you could buy the design for.It uses a Scanspeak Discover 8 inch woofer and a Morel dome mid .I have that design but not got around to building it.
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Well I don't know if the tuning in that particular speaker has any problem or not or the woofer you used was faulty maybe, but that woofer has many successful iterations...as for example you can check Troel Gravesen's SB acoustic 3WC. Here is the link ...
http://www.troelsgravesen.dk/SBAcoustics-3WC.htm