Apples n' oranges; the bass cab is grossly out of phase over a BW that's critical for consonants' impact on high speech intelligibility whereas the MC is nominally in phase, only off over a narrow arc, so one has to be pretty close to a multi-cell to notice it and even then I have to listen for it.
Assuming Altec didn't tweak their measurements, the MC's have smoother rising on axis response than the sectoral horns, which are pretty good, all things considered.
GM
Better if we have driver specs, but can convert the design's vent system to a multiple pipe one.
GM
Thank you GM, this is what I've gathered.
25cm -1O inch FULL RANGE SPEAKER 10F-60 . lmpedance:8 ohm. Program source Input:60W. Frequency response. fo-20,000hz . Lowest resonance frequency 30Hz . Output sound pressure leve: 94 db Total magnetic flux. 210,000 maxwell. Weight:6.8kg (14 96 lbs).
Recommended cabinet internal dimensions :345mm W x 635mm HT x 250mm D
Rectangular reflex port internal dimension :150mm W x 60mm HT x 200mm D
Cabinet internal volume : 55 litres
Many thanks again GM.
25cm -1O inch FULL RANGE SPEAKER 10F-60 . lmpedance:8 ohm. Program source Input:60W. Frequency response. fo-20,000hz . Lowest resonance frequency 30Hz . Output sound pressure leve: 94 db Total magnetic flux. 210,000 maxwell. Weight:6.8kg (14 96 lbs).
Recommended cabinet internal dimensions :345mm W x 635mm HT x 250mm D
Rectangular reflex port internal dimension :150mm W x 60mm HT x 200mm D
Cabinet internal volume : 55 litres
Many thanks again GM.
These are the minimum numbers needed to clculate a basic box:
Fs = 30 Hz
Qt = ?
Vas = ?
dave
Thank you Dave, I'm afraid I'm in total darkness here too, could never find any other data accept this. Looks like I've got to gather some tools & learn to measure T/S.
Many thanks
Many thanks
Manage to find some addition info from Japanese site Dave
Effective vibration radius (a) 10.7cm
Vibration system equivalent mass (mo) 29g
Qo 0.45
Effective vibration radius (a) 10.7cm
Vibration system equivalent mass (mo) 29g
Qo 0.45
Hi,
Not sure an onken is a good idea for a full range with thin and light cone.
You need the Fs in Hz, Vas in liters, Qts which is maybe your Qo while it could be the Qe so mechanical behavior Qm number is missing to calculate the Qts. Yes go for the little Dayton gadget at 45 usd...
You should use this FR above your Onken. In your shoes but if you have a very huge listening room, I will buy a Fostex for a mini Onken instead, low Fs around 25 Hz, steef and heavy paper cone enough for bass as the old US drivers Japan guys were picking.
But your Coral should work fine with a closed sub servo controled with integrated low pass filter you can set up between 100 hz to 150 Hz but notice the caps needed for the high pass filter with the Coral if first order is morenthan 360 uF and perhaps too near from the Coral Fs for its survey... ????
Why not a mini design a la vojce of the theater as GM is here to advice ? Lkw end of the Coral towards 80 Hz, a sealed sedvo sub bellow and a driver of your choice above your coral = hapyness ?
Cheers
Not sure an onken is a good idea for a full range with thin and light cone.
You need the Fs in Hz, Vas in liters, Qts which is maybe your Qo while it could be the Qe so mechanical behavior Qm number is missing to calculate the Qts. Yes go for the little Dayton gadget at 45 usd...
You should use this FR above your Onken. In your shoes but if you have a very huge listening room, I will buy a Fostex for a mini Onken instead, low Fs around 25 Hz, steef and heavy paper cone enough for bass as the old US drivers Japan guys were picking.
But your Coral should work fine with a closed sub servo controled with integrated low pass filter you can set up between 100 hz to 150 Hz but notice the caps needed for the high pass filter with the Coral if first order is morenthan 360 uF and perhaps too near from the Coral Fs for its survey... ????
Why not a mini design a la vojce of the theater as GM is here to advice ? Lkw end of the Coral towards 80 Hz, a sealed sedvo sub bellow and a driver of your choice above your coral = hapyness ?
Cheers
Nice to see you here diyiggy. Your not reading my post clearly. This happens to be a 10 inch wide band woofer with an FS of 30hz. Why would I want to put it on top of the Onken cabinet? The cones aren't thin, I already have the speaker at hand besides it sounded very good when I test it on an OB so am curious to heat how it would sound in an Onken box.
Btw my idea is to use it in a 2way but the box has to come first. As far as specs are concern, short of having to learn how to measure myself, this is all that I can find.
Cheers
Btw my idea is to use it in a 2way but the box has to come first. As far as specs are concern, short of having to learn how to measure myself, this is all that I can find.
Cheers
I was on te Multiway forum and saw your post... well it's not a dac, but you have now my thoughs 🙂... But you have some serious specialists here who really know, I don't !
Fs is not the end of the story whil I believe the resonance frequency of the Onken has to be tunned above for a good result at ears from the guy I know which has one Onken with two big JBL. Certainly OK for most rooms which dominates the bass behavior imho ! No it's just seem to me the FR behavior of the Coral could be affected by the too small weight of the cone (as many FR are) if too much in use in the low end?!
So maybe a VotT design while not resolving your bass needs will be gooder for this Coral, cause of its snappy behavior in the upper bass (>80 Hz) and its short lens for the directivity? if you had the Qts of the driver it will be easier for you to decide... So the Dayton thingy not to be in the dark ?
I'm just guessing though, dunno what it could give in real life ! I really think you will have more sucess with a controlled sub for the first two octaves to focus on diy for the upper registers, just my 2 cents, YMMV of course.
Hopes all is fine at spore and Indo 🙂
Fs is not the end of the story whil I believe the resonance frequency of the Onken has to be tunned above for a good result at ears from the guy I know which has one Onken with two big JBL. Certainly OK for most rooms which dominates the bass behavior imho ! No it's just seem to me the FR behavior of the Coral could be affected by the too small weight of the cone (as many FR are) if too much in use in the low end?!
So maybe a VotT design while not resolving your bass needs will be gooder for this Coral, cause of its snappy behavior in the upper bass (>80 Hz) and its short lens for the directivity? if you had the Qts of the driver it will be easier for you to decide... So the Dayton thingy not to be in the dark ?
I'm just guessing though, dunno what it could give in real life ! I really think you will have more sucess with a controlled sub for the first two octaves to focus on diy for the upper registers, just my 2 cents, YMMV of course.
Hopes all is fine at spore and Indo 🙂
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I will assum Qo is Qt
Fs = 30 Hz
Qt = 0.45
Vas = ?
Now the last number. These numbers are usually good for a box using my alignment, just need the last number to figure out how nig the box needs to be.
dave
Fs = 30 Hz
Qt = 0.45
Vas = ?
Now the last number. These numbers are usually good for a box using my alignment, just need the last number to figure out how nig the box needs to be.
dave
It's a Full Orange Sumotan said !
Could this thing gives the true numbers Pano needs ? Dayton Audio DATS V3 Computer Based Speaker & Audio Component Test System
Cause datasheet are not always acurate and the driver had a life (Qm and Qts moved ? Fs higher ?)
Could this thing gives the true numbers Pano needs ? Dayton Audio DATS V3 Computer Based Speaker & Audio Component Test System
Cause datasheet are not always acurate and the driver had a life (Qm and Qts moved ? Fs higher ?)
Many times claims of inaccurate data sheets have measured the T/S of a driver at a different place on the curve. T/S are not the single numbers we use, but curves. The numbers we get depend on where on the curve the numbers are taken.
DTS 3 guess the T/S (as per the authour of the SW). The closest you will get to useful numbers is the Smith + Larson WT2.
dave
DTS 3 guess the T/S (as per the authour of the SW). The closest you will get to useful numbers is the Smith + Larson WT2.
dave
BVR
He said he just wanted to 'rig' up a box to hear how it sounds, so no real accuracy required to find out if he likes a multi-vent BVR's 'tone', so with a 55 L net Vb*1.44 = ~79.2 L Vas, which falls in line with other Coral, Phillips, et al of the day and probably 'close enough' for a finished design, ditto Fs, Qo = Qts.
Anyway, with a 55 L net cab, all that's left is to find Coral's recommended vent tuning to convert it to a [6] or [8] slot vent system, which to save time, effort can be tubes glued together and to the cab's side walls.
GM
He said he just wanted to 'rig' up a box to hear how it sounds, so no real accuracy required to find out if he likes a multi-vent BVR's 'tone', so with a 55 L net Vb*1.44 = ~79.2 L Vas, which falls in line with other Coral, Phillips, et al of the day and probably 'close enough' for a finished design, ditto Fs, Qo = Qts.
Anyway, with a 55 L net cab, all that's left is to find Coral's recommended vent tuning to convert it to a [6] or [8] slot vent system, which to save time, effort can be tubes glued together and to the cab's side walls.
GM
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Coral says tuned to 44 Hz, HR = 41.7 Hz [-driver, bracing losses, so 42+Hz]: http://diyparadise.com/w/wp-content/uploads/images/stories/corals/coral_reflex_sealed.jpg
Much too high for a 30 Hz Fs, especially with a > 0.4 Qts. Based on these specs' discrepancy, this is too much of a crap shoot, so need at least a measured Fs.
GM
Many thanks again GM & Planet Dave. Will find a way to measure Vas.
Looks like I will have to purchase a WT2 Dave but I've read some threads here that service or support is not good, don't know if such device are robust or ????
Thank you again Gents
Looks like I will have to purchase a WT2 Dave but I've read some threads here that service or support is not good, don't know if such device are robust or ????
Thank you again Gents
Hi Sumotan,
AllenB suggested me elsewhere a driver can be a measured with some free softs with a little more diy... learning curve certainly longer but much more interessant if you have time when retired... when I see the manuals of Arta and REW, I cry due to my low level in english language...
AllenB suggested me elsewhere a driver can be a measured with some free softs with a little more diy... learning curve certainly longer but much more interessant if you have time when retired... when I see the manuals of Arta and REW, I cry due to my low level in english language...