"A" is aluminium, w\o "A" - titanium.
somebody on this forum removed adaptor from 2060(A?).
one replacement phragm saling by dealer for 1460a/2060a.. both are 3".
somebody on this forum removed adaptor from 2060(A?).
one replacement phragm saling by dealer for 1460a/2060a.. both are 3".
yes
Helmuth, Flaesh, Pano,
I thank you all very very much for staying with me.
What I understood is coving 500-16000 range (on and some off axis) with Compression Driver and a suitable horn combination is not that easy in terms of linear f response and low distortion. I will be better off if I go for 1000-16000 range, right? Crossover point at 1k with Petite Onken is no problem.
If I can place onken box against back wall is the question. Also I will have to decide which wood horn to craft myself - any advice? I will choose compression driver with 2'' mouth from your suggested list - these are great drivers anyway.
Thanks again for great help.
Regards
I thank you all very very much for staying with me.
What I understood is coving 500-16000 range (on and some off axis) with Compression Driver and a suitable horn combination is not that easy in terms of linear f response and low distortion. I will be better off if I go for 1000-16000 range, right? Crossover point at 1k with Petite Onken is no problem.
If I can place onken box against back wall is the question. Also I will have to decide which wood horn to craft myself - any advice? I will choose compression driver with 2'' mouth from your suggested list - these are great drivers anyway.
Thanks again for great help.
Regards
With those 2" drivers you should not have any problem crossing at 700Hz. But higher is OK, too. Just be sure the horn mouth is big enough - I would say 50-60cm at least.
If your horns do not have to be wood, have a look at this thread: http://www.diyaudio.com/forums/group-buys/166312-waveguides-horns-36.html#post2434591 They are made in Poland.
A friend of mine in Hawaii just got 2 pair, mids and highs. He says they are very nice.
You can put the Onken against the wall, but it does sound better out in room.
If your horns do not have to be wood, have a look at this thread: http://www.diyaudio.com/forums/group-buys/166312-waveguides-horns-36.html#post2434591 They are made in Poland.
A friend of mine in Hawaii just got 2 pair, mids and highs. He says they are very nice.
You can put the Onken against the wall, but it does sound better out in room.
And cheaper.
The samples I posted are rated down to 800Hz 12 dB oct at given power rating.
But in living room at lower power you can filter 700Hz Or the 2" 550Hz. It is so loud it will not reach x-max. And you can go steeper filter 18dB oct.
And the other factor was given by Pano the horn cuttoff can extend the response and control the X-max of your compression driver. So that in the end you can filter low at lower power then the max power it was designed for.
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Hello Minhai,
I will make a quick caculation for you to show it isn't a problem with your 5Watt 300b-SE to even filter at 500Hz.
When we compare the PHON line at 50Hz and 500Hz you will see the 50Hz needs 10dB more then 500Hz to be as loud experienced as 500Hz.
This means that 500Hz needs 0,1 of the power as at 50Hz.
So 0,1 X 5W= 0,5Watt is the max your HF driver gets at full power of the 300B se.
As we look at the Beyma HF driver http://profesional.beyma.com/ingles/pdf/SMC65Nd.pdfmeasured at 1Watt with out filter. You can see distortion and spl at 1Watt without filter.
The third and second harmonic are about -20dB at 1W and 100-110dB this is 1% distortion. There is also a peak at 650Hz of -10dB this is 10% at 1W and 100dB. But you will maximal do about 0,5W this means less distortion at maximum power of the 300B.
10% distortion at 100dB is a normal value for hifi rated speakers but horn drivers are often upper hand to HIFI stuff what THD to spl concerns.
This beyma not the best performing what distortion figures are showing, but probably for your application a very use full driver. With low distorsion this THD also depends on used horn and loading down to cut-off frequency.
I will make a quick caculation for you to show it isn't a problem with your 5Watt 300b-SE to even filter at 500Hz.
An externally hosted image should be here but it was not working when we last tested it.
When we compare the PHON line at 50Hz and 500Hz you will see the 50Hz needs 10dB more then 500Hz to be as loud experienced as 500Hz.
This means that 500Hz needs 0,1 of the power as at 50Hz.
So 0,1 X 5W= 0,5Watt is the max your HF driver gets at full power of the 300B se.
As we look at the Beyma HF driver http://profesional.beyma.com/ingles/pdf/SMC65Nd.pdfmeasured at 1Watt with out filter. You can see distortion and spl at 1Watt without filter.
The third and second harmonic are about -20dB at 1W and 100-110dB this is 1% distortion. There is also a peak at 650Hz of -10dB this is 10% at 1W and 100dB. But you will maximal do about 0,5W this means less distortion at maximum power of the 300B.
10% distortion at 100dB is a normal value for hifi rated speakers but horn drivers are often upper hand to HIFI stuff what THD to spl concerns.
This beyma not the best performing what distortion figures are showing, but probably for your application a very use full driver. With low distorsion this THD also depends on used horn and loading down to cut-off frequency.
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Well, just because you can, does not mean you should.
Although you are unlikely to destroy these big pro drivers at home listening levels, they still may not sound their best crossed low. group delay and distortion are the limits to work within. They need to be crossed where they sound best, that's the point of building a rig like this, right?
Although you are unlikely to destroy these big pro drivers at home listening levels, they still may not sound their best crossed low. group delay and distortion are the limits to work within. They need to be crossed where they sound best, that's the point of building a rig like this, right?
Well, just because you can, does not mean you should.
Although you are unlikely to destroy these big pro drivers at home listening levels, they still may not sound their best crossed low. group delay and distortion are the limits to work within. They need to be crossed where they sound best, that's the point of building a rig like this, right?
I have done a simulation for a soft-dome mid to determine if it would be within it Xmax.
When you look to the sensitivity of humans in the graphic then you can see at low level 20dB less power is needed to get same spl experience and at medium level 10dB less.
This is 0,01% to 0,1% of the output power of the amp is needed. Then calculate the extrusion of the mid driver.
So it isn't nonsense that I say it can be crossed that low because it will in Minhaj's case never get more then 1Watt when listening music. Then the only limitation is the x-max of the HF driver.
But I have to agree with Pano cross at the best sounding XO point it is not likely you destroy the driver.
Hello minhaj,
I found a very linear 1" driver cost only 100 euro and down to 500Hz! Ideal for hifi level with low XO. If distortion levels are expectable can not be seen in this spec..
The 1,4" PU721T is may better capable to croos low at has perfect impedance behaiviour at cut of and very flat response.(about 300euro)
I found a very linear 1" driver cost only 100 euro and down to 500Hz! Ideal for hifi level with low XO. If distortion levels are expectable can not be seen in this spec..
The 1,4" PU721T is may better capable to croos low at has perfect impedance behaiviour at cut of and very flat response.(about 300euro)
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Dear Helmuth and other, sorry I was away for a while. Meanwhile I have thought about changing my plan in a different way.
I think I will go with split cornscala in a two way config -split cornscala bass section + 850pb/950pb or Fital pro hf200 in 250hz/300hz edgar tractrix diy wood horn. Problem is K33/e or Emienece Kappa 15C/A or Kappa pro 15A is not locally available. Instead can I use this driver? Or I modify the cab for this driver. I like large bass cabs like onken box for altec 515 whick is about900mmx750mmx550mm.
Actually if you can help me to use this 15'' in cornscala style cab I can start my project and fulfill my dream.
I am also no where about the xover config pls help, my ability to use winisd or such SW is limited.
Regards
I think I will go with split cornscala in a two way config -split cornscala bass section + 850pb/950pb or Fital pro hf200 in 250hz/300hz edgar tractrix diy wood horn. Problem is K33/e or Emienece Kappa 15C/A or Kappa pro 15A is not locally available. Instead can I use this driver? Or I modify the cab for this driver. I like large bass cabs like onken box for altec 515 whick is about900mmx750mmx550mm.
Actually if you can help me to use this 15'' in cornscala style cab I can start my project and fulfill my dream.
I am also no where about the xover config pls help, my ability to use winisd or such SW is limited.
Regards
That is a serious woofer minhaj.
Because your in too horns I caculated a basreflex with a 36cm long frontloaded tractrix horn.
the result is 1phi 1meter 1W.
BR 110l pipe 200^2 cm and 25cm long
like in this picture the lowest speaker at the top is a fullrange driver.
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