Flash flare -- nothing to do with a clean lens -- just shows how shiny Chris got the boxes....
besides those pics are over 2 years old.
dave
besides those pics are over 2 years old.
dave
nice
Thank you very much! Please tell me how low this my driver can play music in alpha TL ? 50Hz -more or less? And is there any chanse for this driver to play nice in some other tipe of TL speakers. Building of boxes is not a problem .
Thank you. I realy want to make something like DALINE.
Thank you very much! Please tell me how low this my driver can play music in alpha TL ? 50Hz -more or less? And is there any chanse for this driver to play nice in some other tipe of TL speakers. Building of boxes is not a problem .
Thank you. I realy want to make something like DALINE.
Re: nice
With an Fs of 74 you aren't going to get 50 hz out of it. Best to tune a bit higher. GM knows what he is doing... i'd go with his suggestion.
Given the way B&W designs things, i'd suggest they intended this for misrange use, and not as a midbass driver (i could be totally wrong)
dave
drVelinov said:
With an Fs of 74 you aren't going to get 50 hz out of it. Best to tune a bit higher. GM knows what he is doing... i'd go with his suggestion.
Given the way B&W designs things, i'd suggest they intended this for misrange use, and not as a midbass driver (i could be totally wrong)
dave
Re: nice
Greets!
You're welcome!
Same as in a large sealed cab, though of course it's excursion will limit how loud it plays before audible distortion begins.
A T/S max flat ML-TL will have much more gain to a lower Fb (aneochoically flat to ~40 Hz) than any TL, but below Fb it rolls off at 24 dB/octave, so if you have source material that goes lower you'll have to use some form of EQ to protect the driver if it doesn't have much Xmax.
One more time, high Q drivers are not good candidates for Dalines. The large filter chamber required when combined with the correct size/taper/length TL vent will result in a very underdamped alignment tuned way too low. Once stuffed enough, you wind up with a ~IB response, so might as well just make a simple sealed cab of the same total Vb.
If you use a small, underdamped filter chamber to allow the use of the correct TL vent, then once it's stuffed enough to damp most of the ripple out of it, you wind up with a lower gain version of a Fs = Fp Alpha TL, only it will be larger, more labor intensive, costly.
The 104 Hz Alpha TL I suggested has more gain than either in the midbass, is smaller, and has a 30Hz efficiency only a couple of dB lower than the other two, so for me, the choice is a 'no-brainer'.
All based on MJK WS sims and published specs of course, so as always YMMV.
If you still want to build the custom Daline:
filter chamber:
Vb = 0.23 ft^3
TL vent:
So = 29.4578"^2
SL = 19.6385"^2
I leave it to you to adapt these dims to Robert Fris's Daline design posted on the net (Dave P-10's site?) and of course experiment with stuffing density. FYI I wound up with 0.8 lbs/ft^3 (polyfil).
GM
drVelinov said:
Greets!
You're welcome!
Same as in a large sealed cab, though of course it's excursion will limit how loud it plays before audible distortion begins.
A T/S max flat ML-TL will have much more gain to a lower Fb (aneochoically flat to ~40 Hz) than any TL, but below Fb it rolls off at 24 dB/octave, so if you have source material that goes lower you'll have to use some form of EQ to protect the driver if it doesn't have much Xmax.
One more time, high Q drivers are not good candidates for Dalines. The large filter chamber required when combined with the correct size/taper/length TL vent will result in a very underdamped alignment tuned way too low. Once stuffed enough, you wind up with a ~IB response, so might as well just make a simple sealed cab of the same total Vb.
If you use a small, underdamped filter chamber to allow the use of the correct TL vent, then once it's stuffed enough to damp most of the ripple out of it, you wind up with a lower gain version of a Fs = Fp Alpha TL, only it will be larger, more labor intensive, costly.
The 104 Hz Alpha TL I suggested has more gain than either in the midbass, is smaller, and has a 30Hz efficiency only a couple of dB lower than the other two, so for me, the choice is a 'no-brainer'.
All based on MJK WS sims and published specs of course, so as always YMMV.
If you still want to build the custom Daline:
filter chamber:
Vb = 0.23 ft^3
TL vent:
So = 29.4578"^2
SL = 19.6385"^2
I leave it to you to adapt these dims to Robert Fris's Daline design posted on the net (Dave P-10's site?) and of course experiment with stuffing density. FYI I wound up with 0.8 lbs/ft^3 (polyfil).
GM
Re: Re: nice
I found on B&W site that this drivers are from inwall speakers. And they are midbass.If you want you can check.They also say that this speakers play from 50HZ.What do you mean abouit it.
planet10 said:
I found on B&W site that this drivers are from inwall speakers. And they are midbass.If you want you can check.They also say that this speakers play from 50HZ.What do you mean abouit it.
Re: Re: nice
I didn't understud everything. The reason is my bad english,and my profesion-I am a medical doctor.
🙂 🙂
Please can you explane me what is:IB,Vb,So ,SL, FYI.
Can you do it conversion in internationals measures(ft^3,"^2 in L and cm^2 or m^3 and m^2)
And can you calculate me dimensiones for Daline with my drivers,and draw me the plan.PLEASE
I hope I don't asking too much.And haw deep will play this driver in alpha TL ,and in Daline.
GM said:
I didn't understud everything. The reason is my bad english,and my profesion-I am a medical doctor.
🙂 🙂
Please can you explane me what is:IB,Vb,So ,SL, FYI.
Can you do it conversion in internationals measures(ft^3,"^2 in L and cm^2 or m^3 and m^2)
And can you calculate me dimensiones for Daline with my drivers,and draw me the plan.PLEASE
I hope I don't asking too much.And haw deep will play this driver in alpha TL ,and in Daline.
Re: Re: Re: nice
Yes as you say "Midbass" 50 hz is nearly into the 'sub' bass area dude. 😀
drVelinov said:
Yes as you say "Midbass" 50 hz is nearly into the 'sub' bass area dude. 😀
Re: Re: Re: nice
IB = Infinite Baffle (ie big sealed box)
Vb = volume of box
So = cross-section at the start of the line.
Sl = cross-section at the end of the line.
FYI - for your information
GM has designed 2 boxes for you... you should take that and work out the box details yourself... that will ensure that you have an understanding of what you are doing. Understanding is important.
dave
drVelinov said:
IB = Infinite Baffle (ie big sealed box)
Vb = volume of box
So = cross-section at the start of the line.
Sl = cross-section at the end of the line.
FYI - for your information
GM has designed 2 boxes for you... you should take that and work out the box details yourself... that will ensure that you have an understanding of what you are doing. Understanding is important.
dave
Re: Re: Re: Re: nice
What you want to say? The people in B&W are layers? I don't anderstud
Madmike2 said:
What you want to say? The people in B&W are layers? I don't anderstud
Re: Re: nice
I still have some questions:
How long line (pipe) should be in Daline for my driver?
Is it Vb for whole box or just for chamber?
Is it So of the shambre,or start of the line?
THank you very much for all your answers.
I still have some questions:
How long line (pipe) should be in Daline for my driver?
Is it Vb for whole box or just for chamber?
Is it So of the shambre,or start of the line?
THank you very much for all your answers.
>I still have some questions:
How long line (pipe) should be in Daline for my driver?
Is it Vb for whole box or just for chamber?
Is it So of the shambre,or start of the line?
THank you very much for all your answers.
====
Greets!
Oops! 43.46" long.
Just the driver chamber.
Start of the TL vent, like Dave said, and tapers down to the smaller area (SL).
I don't do drawings. As it is, I probably freely share far more of my hard earned knowledge than you do medical help if you're a typical doctor.
I use this little program for my measurement conversions: http://www.joshmadison.com/software/convert/
GM
How long line (pipe) should be in Daline for my driver?
Is it Vb for whole box or just for chamber?
Is it So of the shambre,or start of the line?
THank you very much for all your answers.
====
Greets!
Oops! 43.46" long.
Just the driver chamber.
Start of the TL vent, like Dave said, and tapers down to the smaller area (SL).
I don't do drawings. As it is, I probably freely share far more of my hard earned knowledge than you do medical help if you're a typical doctor.
I use this little program for my measurement conversions: http://www.joshmadison.com/software/convert/
GM
I am ewerything else but a typical doctor.Typical doctor in Serbia? -mission imposible!GM said:
🙂
43,46" is just line without chamber ? I just want to be sure.
Is it TL vent on the end of the chambre and on begining of the line? Thank you again.🙂
Greets!
====
>43,46" is just line without chamber ? I just want to be sure.
Is it TL vent on the end of the chambre and on begining of the line? Thank you again.
====
Just the line. 'Line' and 'TL vent' means the same thing so is attached to the filter chamber where the driver is.
====
>I have TL speakers with jvc midbass drivers. And I put B&W in them. They sound very good, but have a less bass then JVC>This is plan for My speakers.
>I am ewerything else but a typical doctor.Typical doctor in Serbia? -mission imposible!
====
OK, but this tells me nothing about you WRT my comment, so all I have to form an opinion of you is your posts, which implies to me that because you're a doctor we all should freely spend as much of our quality time as required to do your bidding and I resent your PM ~politely demanding I review/redesign your drawing to suit your new drivers. I've given you all the info necessary for either you or one of your friends/relatives/staff/whatever to do it.
GM
====
>43,46" is just line without chamber ? I just want to be sure.
Is it TL vent on the end of the chambre and on begining of the line? Thank you again.
====
Just the line. 'Line' and 'TL vent' means the same thing so is attached to the filter chamber where the driver is.
====
>I have TL speakers with jvc midbass drivers. And I put B&W in them. They sound very good, but have a less bass then JVC>This is plan for My speakers.
>I am ewerything else but a typical doctor.Typical doctor in Serbia? -mission imposible!
====
OK, but this tells me nothing about you WRT my comment, so all I have to form an opinion of you is your posts, which implies to me that because you're a doctor we all should freely spend as much of our quality time as required to do your bidding and I resent your PM ~politely demanding I review/redesign your drawing to suit your new drivers. I've given you all the info necessary for either you or one of your friends/relatives/staff/whatever to do it.
GM
GM said:
You didnt understend me! And I never said that you must answer me, becouse I am a doctor or anything else.The "tYpical doctor "was a joke! If you think that you spend too much your time answering me I am sorry. in our contry we use forums for frendly help and exchange informationes! We not expect any regard for it.I draw plan myself, I am asking you to redraw- not becouse I am a doctor and I am too lazy. NO, I am asking you becouse I am not sure that my opinion and understending is correct.At the end here is the plan. Is it OK? The measures are in centimeters.
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