B&C 21SW150
Hi, just found this one: B&C 21SW150.
http://www.usspeaker.com/B&C-21SW150-1.htm
http://www.bcspeakers.com/index.php?sez=1&categoria=2&prodotto=201
In a 2'x2'x7.7' box it makes for a killer tapped horn in Hornresp.
🙂
Hi, just found this one: B&C 21SW150.
http://www.usspeaker.com/B&C-21SW150-1.htm
http://www.bcspeakers.com/index.php?sez=1&categoria=2&prodotto=201
In a 2'x2'x7.7' box it makes for a killer tapped horn in Hornresp.
🙂
Attachments
Re: David have you seen....
That does look interesting. After a quick look, I'm not sure if there is any advantages over the tapped horn. But heck, more choices is a good thing. 😀
Read patent in PDF format here---> http://www.pat2pdf.org/patents/pat5177329.pdf
moray james said:
That does look interesting. After a quick look, I'm not sure if there is any advantages over the tapped horn. But heck, more choices is a good thing. 😀
Read patent in PDF format here---> http://www.pat2pdf.org/patents/pat5177329.pdf
Fig.1 looks like a TH with a reflex like port. Maybe this goes under mass loading? Probably lowers the tuning and sensitivity, compared to a normal TH.
Fig.2 is completely different due to 2 paths. I wonder how this device would perform compared to a normal TH.
Fig.2 is completely different due to 2 paths. I wonder how this device would perform compared to a normal TH.
does anyone know where i can get a active or passive high pass subsonic filter set at 20hz, very impotent, i played this speaker with 10hz frequency's at a very low volume, and it easily exceeds its xmax
i don't think the horn prevents this below the tuning frequency's so i really need this, anyone know, looked on google but cannot seem to find
i don't think the horn prevents this below the tuning frequency's so i really need this, anyone know, looked on google but cannot seem to find
You already found one. Half the values of the frequency setting resistors to double the cut-off frequency to 20hz (or build one from scratch).
someone mentioned one, but i couldn't find where to get it, there was now web link, im a bit new to building crossovers but like everything im willing to learn
i have finally learned how the horn resp values relate to a atual plan, i was having problems with this, but thanks to a diagram i found in a earlier post, i thinks ive got it, im sure u get abit pissed off with newbies like me!
i will post my final design and horn resp sim soon, i have the driver, and im buying 25mm mdf tomorrow, i think as im using mdf, 25 is better than 18 and will make bracing less necessary. its flat from 25hz to 75hz.... its sure going to be heavy though 😀
thanks for all the help so far guys, like someone said, its easy when u know how 🙂
i have finally learned how the horn resp values relate to a atual plan, i was having problems with this, but thanks to a diagram i found in a earlier post, i thinks ive got it, im sure u get abit pissed off with newbies like me!
i will post my final design and horn resp sim soon, i have the driver, and im buying 25mm mdf tomorrow, i think as im using mdf, 25 is better than 18 and will make bracing less necessary. its flat from 25hz to 75hz.... its sure going to be heavy though 😀
thanks for all the help so far guys, like someone said, its easy when u know how 🙂
ok FINAL design i hope, i think i finally after months of learning have this thing right, and can convert between plan and simulation easly enough now
(here is the plan)
(and here is the prediction in horn resp)
(i used this method)
so as far as i can see im good to go, could someone just confirm that i have done this correctly? thanks
and anyone feel free to use this if u like, but im sure there is better options, ah well live and learn
(here is the plan)
An externally hosted image should be here but it was not working when we last tested it.
(and here is the prediction in horn resp)
An externally hosted image should be here but it was not working when we last tested it.
(i used this method)
An externally hosted image should be here but it was not working when we last tested it.
so as far as i can see im good to go, could someone just confirm that i have done this correctly? thanks
and anyone feel free to use this if u like, but im sure there is better options, ah well live and learn
come on guys lol, im building this tomorrow! gotta make sure i haven't made some stupid mess up that will ruin all the hard work😱
"someone mentioned one, but i couldn't find where to get it"
Naudio []
diyAudio Member
Offline
Registered: Sep 2007
Location: kent
Post #1683
from reading past posts, it seems that i will need a subsonic filter to protect the eminence from bottoming out.
i cannot find many, im guessing i should use 1 at 20hz but this set at 10
http://store.xmfanstore.com/linedriver.html
will it suffice?
also is it possible to use my pc as a subsonic filter, so the card would cut off unwanted output below 20hz
Last edited by Naudio on 05-01-2008 at 12:54 PM
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I think you should dig up the 59,00 € and buy this crossover with subsonic filter:
http://www.reckhorn.com/index.php?ln=en&prod=b1
Naudio []
diyAudio Member
Offline
Registered: Sep 2007
Location: kent
Post #1683
from reading past posts, it seems that i will need a subsonic filter to protect the eminence from bottoming out.
i cannot find many, im guessing i should use 1 at 20hz but this set at 10
http://store.xmfanstore.com/linedriver.html
will it suffice?
also is it possible to use my pc as a subsonic filter, so the card would cut off unwanted output below 20hz
Last edited by Naudio on 05-01-2008 at 12:54 PM
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I think you should dig up the 59,00 € and buy this crossover with subsonic filter:
http://www.reckhorn.com/index.php?ln=en&prod=b1
Hi Naudio - Good luck with your project! Everything looks on the up-and-up to me. Of course, I don't know which Eminence speaker you're using, and how hard you plan to push it.
Why are you worried about 10-20 Hz output? Organ music, Synth or DVD playback sometimes gets down that low.
Why are you worried about 10-20 Hz output? Organ music, Synth or DVD playback sometimes gets down that low.
thanks, im glad its all in order, just needed to be sure. i made a few minor mistakes but i have ironed them out now, for example i get a extra 1db!!!!!lol from making the mouth a tiny bit larger. the driver is the definimax 12"
this looks great http://www.reckhorn.com/index.php?ln=en&prod=b1 thanks
with this i can set the sub up for its optimal range 20-75hz, and if i need to push the sub really hard i can just raise the subsonic filter to 30/40hz, but this seems to do everything i need, i have a 180w amp that will go nicely with this. perfect 🙂
going to be hard to buy from that site, it links me to one in another language, but they ship to england so should be fine, will have 2 use a translator
this looks great http://www.reckhorn.com/index.php?ln=en&prod=b1 thanks
with this i can set the sub up for its optimal range 20-75hz, and if i need to push the sub really hard i can just raise the subsonic filter to 30/40hz, but this seems to do everything i need, i have a 180w amp that will go nicely with this. perfect 🙂
going to be hard to buy from that site, it links me to one in another language, but they ship to england so should be fine, will have 2 use a translator
Naudio_Eminence_TH
Hi Naudio:
From what I can see I agree with Don Snyder, assuming that you are still going with the Eminence Definimax 4012HO. As a learning experience I redrew you enclosure, and attached the Hornresp labels for a four section horn. Naturally, it models just the same. It does give you another degree of freedom for you simulations though.
You may want to take a look at the dimensions at the turn-around in the long horn section, I don't come up with the same dimension as you do. Also, the location of "s3area" in your sketch should not be at the bottom end of the horn, but belongs at the point where the wave coming from S2 along the "L23" path interacts with the loudspeaker and the wave along the "L34" path. Neither one of those items changes the model significantly. According to Hornresp,this box/speaker combination seems to be very forgiving. I came up with one simulation that has a fairly similar frequency response with a system volume of 194.1 liters.
Have fun with you project.🙂
Hi Naudio:
From what I can see I agree with Don Snyder, assuming that you are still going with the Eminence Definimax 4012HO. As a learning experience I redrew you enclosure, and attached the Hornresp labels for a four section horn. Naturally, it models just the same. It does give you another degree of freedom for you simulations though.
You may want to take a look at the dimensions at the turn-around in the long horn section, I don't come up with the same dimension as you do. Also, the location of "s3area" in your sketch should not be at the bottom end of the horn, but belongs at the point where the wave coming from S2 along the "L23" path interacts with the loudspeaker and the wave along the "L34" path. Neither one of those items changes the model significantly. According to Hornresp,this box/speaker combination seems to be very forgiving. I came up with one simulation that has a fairly similar frequency response with a system volume of 194.1 liters.
Have fun with you project.🙂
love your plan. much cooler looking than my paint doodle
u seem to have added s5 into the design, is that just a way of making it more accurate, were your simulations similar enough to mine?
i ran a sim with your specs in horn resp, and it gives a very erratic response, it seems to think that s3 is the opposite side to the driver s2,
not sure why, im guessing it may be to do with me having the older horn resp, as the newer one wont work on my pc for some reason
could u post me up a quick response pic with your input methods?
u seem to have added s5 into the design, is that just a way of making it more accurate, were your simulations similar enough to mine?
i ran a sim with your specs in horn resp, and it gives a very erratic response, it seems to think that s3 is the opposite side to the driver s2,
not sure why, im guessing it may be to do with me having the older horn resp, as the newer one wont work on my pc for some reason
could u post me up a quick response pic with your input methods?
confirm speaker used?
can you confirm the speaker you used in that simulation please? you talked about two different types last page but I couldn't find where you decided what to use.
can you confirm the speaker you used in that simulation please? you talked about two different types last page but I couldn't find where you decided what to use.
fair enough, did take me a while before i got somewhere, i went with the eminence definimax in the end, i thought the added excursion of the peerless was unnecessary, also it has a low bl, and i heard this wasn't good. the frequency response as oliver said, was alot more forgiving of small changes than the peerless, getting wood tomorrow, oh wait 2.26am! today it is then
http://www.eminence.com/proaudio_sp...=DEFINIMAX4012HO&speaker_size=12&SUB_CAT_ID=1
this may not be true, the sound from the speaker isnt sent directly up the horn, some of it must "bounce" off the bottom before traveling up the horn, just a thought..
http://www.eminence.com/proaudio_sp...=DEFINIMAX4012HO&speaker_size=12&SUB_CAT_ID=1
this may not be true, the sound from the speaker isnt sent directly up the horn, some of it must "bounce" off the bottom before traveling up the horn, just a thought..
Naudio_Eminence_TH_4 Sections
Hi Naudio,
I'll attach the four section Hornresp data. There are some minor differences in the speaker parameters, I used Hornresp to recalculate the values, and they differ slightly from the Manufacturers. Rg is at 0.25, that should have been changed, again the difference is minor. Hornresp version used: 1910-080423.
Regards,
Hi Naudio,
I'll attach the four section Hornresp data. There are some minor differences in the speaker parameters, I used Hornresp to recalculate the values, and they differ slightly from the Manufacturers. Rg is at 0.25, that should have been changed, again the difference is minor. Hornresp version used: 1910-080423.
Regards,
Attachments
Naudio: The latest version of HornResp allows you to use more sections ... which will confuse you by changing the meaning of S3, S4, L23, etc. This complication won't help with the simple design you are using.
What you did is correct for a 3 section horn.
Remember, leaks are a horn's worst problem ... fit and assemble carefully.
What you did is correct for a 3 section horn.
Remember, leaks are a horn's worst problem ... fit and assemble carefully.
thanks for the reply.
i'm trying to run through the design process with the tang band 1138 5.25" sub. in an attempt to see what can be done with this arrangement and a small but capable driver. but it's back to the research cause its just not working in the program simulation....nothing is. so i know its me thats the problem, also i guess i have a different version than you have and its throwing me for a loop.
understanding.....the first step 🙂
i'm trying to run through the design process with the tang band 1138 5.25" sub. in an attempt to see what can be done with this arrangement and a small but capable driver. but it's back to the research cause its just not working in the program simulation....nothing is. so i know its me thats the problem, also i guess i have a different version than you have and its throwing me for a loop.
understanding.....the first step 🙂
I am playing Hornresp 1910-080422. I decided to see what I can do with some Dayton Titanic III 10" specs. I used the Parts Express DuMax report rather than the MFR specs.
I sure as heck can't get the pretty flat curves you guy's seem to get. Can someone please point me in the right direction?
Below is what I have so far.
I chose the Titanics because I currently have two in small sealed enclosures begging to be set free.
Paul
I sure as heck can't get the pretty flat curves you guy's seem to get. Can someone please point me in the right direction?
Below is what I have so far.
I chose the Titanics because I currently have two in small sealed enclosures begging to be set free.
Paul
