Hi all
So after discarding of my old speakers i am now finally prepared for my first “real” diy speaker. I once built one during high school, but with alot less budget and less no knowledge about physics and electronics.
For everything i have until now i used winisd for port and box calc and then i will just calculate crossover by hand.
Planned is a two way for desk use.
Now to my problem:
I havent heard alot of different speaker materials and i dont know how they sound.
Ceramic cones are very new to me, i only heard they have great clarity.
I have the possibility to get two accutons for around 300 dollars for both, from a guy who used them. The model is c173-11-095 the frequency response is very similar to the c173-06-096.
Link: https://www.lautsprechershop.de/pdf/accuton/accuton_c173_11_095.pdf
So im pretty fixxed on this as the mid bass driver.
Im planning to make a bass ported version with a case of around 14 litres.
Low pass frequency would be at 2000 hz and not higher since i need to avoid the resonating area that starts at 2500 hz.
Now, my question is: what tweeters would be a good match for those?
Alu, be, soft dome, electrostats?
What tweeter material besides ceramic would be a good matchup?
If i find accuton tweeters used in good condition i will use those but otherwise they break the bank for me, Im a still a student.
Also if you any particular tweeter for around 100-150 im all ears.
I habe never heard electrostats but there are some accuton 2-ways out there that use them but the ones i saw were around 400 per tweeter...
I could buy two scanspeak R2904/700005 for 370 for both, as dead stock from china. A good price for these as it seems but still breaking the bank.
Thankful for any recommendations 🙂)
So after discarding of my old speakers i am now finally prepared for my first “real” diy speaker. I once built one during high school, but with alot less budget and less no knowledge about physics and electronics.
For everything i have until now i used winisd for port and box calc and then i will just calculate crossover by hand.
Planned is a two way for desk use.
Now to my problem:
I havent heard alot of different speaker materials and i dont know how they sound.
Ceramic cones are very new to me, i only heard they have great clarity.
I have the possibility to get two accutons for around 300 dollars for both, from a guy who used them. The model is c173-11-095 the frequency response is very similar to the c173-06-096.
Link: https://www.lautsprechershop.de/pdf/accuton/accuton_c173_11_095.pdf
So im pretty fixxed on this as the mid bass driver.
Im planning to make a bass ported version with a case of around 14 litres.
Low pass frequency would be at 2000 hz and not higher since i need to avoid the resonating area that starts at 2500 hz.
Now, my question is: what tweeters would be a good match for those?
Alu, be, soft dome, electrostats?
What tweeter material besides ceramic would be a good matchup?
If i find accuton tweeters used in good condition i will use those but otherwise they break the bank for me, Im a still a student.
Also if you any particular tweeter for around 100-150 im all ears.
I habe never heard electrostats but there are some accuton 2-ways out there that use them but the ones i saw were around 400 per tweeter...
I could buy two scanspeak R2904/700005 for 370 for both, as dead stock from china. A good price for these as it seems but still breaking the bank.
Thankful for any recommendations 🙂)
Making mistakes like any young man would, too expensive stuff for the moment believing this will benefit you. 
One of the funniest tersest replies I have ever seen at the forum. What Lojzek is telling you is click on his link.
Actually, I think the tweeter capacitors could have been swapped around. But that is just me.
Actually, I think the tweeter capacitors could have been swapped around. But that is just me.
This is a recipe for a disaster, moreover considering your choice of mid-bass (hard material with high breakup and related high H3 and H5 distortion down). Besides that, we are living in 2020 not 1960, there are good crossover simulation programs to use. However as a first project I'd choose an easier (without nasty breakup) and smaller mid-bass (5-5.5", more suitable for your intended use - small desk). Remember, expensive drivers with a poor crossover can and almost always sound worse than inexpensive drivers with a tailored crossover.
See what some very respected designer and hobbyist has to say: Crossovers
My advice is either to find a suitable published design to build, or to embark in the design-yourself path spending first some money in measurement gear (a calibrated mic is a must). For the latter be prepared to spend lots of time and money, without necessarily having the sure reward of a good/excellent outcome.
Ralf
Thanks for the build idea 🙂 . It looks really nice, however i am really intrigued by the accuton chassis. I am selling my jbl monitors for around 600 dollars and i can buy the accutons for 350 and have an offer for a visaton ke25sc, a ceramic coated tweeter. I could have two of them for 160. So i would be able to have another 90 bucks for crossover and stuff. I think the enclosure i will do by myself and will not cost the world.
So this plan wouldnt break the bank for me.
Do you think the difference in those this speaker plan and yours will not be worth the money?
Best regards kilian
So this plan wouldnt break the bank for me.
Do you think the difference in those this speaker plan and yours will not be worth the money?
Best regards kilian
Hmm ok... i do have some experience building speakers. Not that much but still... the reason i want to do the crossover by myself is that i am studying electrical enginnering since two years this shouldnt be an issue. If i need a simulation i will definitely use it. The break up point of the mids i would correct by using dsp filtering. I have a programmable dsp at home with a calibrated umik-1 measurement mic. I have used this to do room correction and a crossover for a tangband project using the w3-1797s before. Using this i could also play with the xover frequency.
Plan would be to cross a 2 khz using the ke25sc and applying a notch filter at the break up frequency of the mid driver. I saw some people do this for theor accuton projects. Troels crossed different accutons with the helping black plastic dots at 2.3 i believe. This is why i would cross a bit lower and use a notch filter. The prject im referring to is 404 Not Found
OR using the w3-1797s i already have to go even lower thus reducing the effect of the break up freq.
I heard very good things about the accutons on troel gravesens site and found some diy projects from people using 6.5” drivers from accuton for a desk speaker.
OR using the w3-1797s i already have to go even lower thus reducing the effect of the break up freq.
I heard very good things about the accutons on troel gravesens site and found some diy projects from people using 6.5” drivers from accuton for a desk speaker.
I bought Infinity Kappa 600 about 12 years ago. They are produced using Ceramic Metal Matrix Diaphragms technology(CMMD). I listened to theirs several times,maybe because our eardrums are not made of ceramics🙂 I wanted to give theirs to my daughter-in-law, but my daughter was offended. My daughter did not take theirs and I don’t know what to do with theirs for 12 years. Since then I have been listening a simple loudspeaker with a Klangfilm KL405+BMS4524.