Hi,
I am wanting to do a 2 way build with beryllium compression driver (if I can find a 4" else 3" diaphragm)
Any thoughts on the purifi PTT10.0X04-NAB-01 (or even 2 of these) vs the 18sound 15NTLW3500
I am wanting to do a 2 way build with beryllium compression driver (if I can find a 4" else 3" diaphragm)
Any thoughts on the purifi PTT10.0X04-NAB-01 (or even 2 of these) vs the 18sound 15NTLW3500
I'm going to use a sub as well up to 120hz if needed that high. What i really want is good clean output from 120hz to 1.2khz.
Something that can keep up with a 4" or 3" beryllium compression driver.
Which do you expect to perform better from 120hz to 1.2khz?
Something that can keep up with a 4" or 3" beryllium compression driver.
Which do you expect to perform better from 120hz to 1.2khz?
Defining this question is really important. You are asking us to compare these two drivers, both of which are very high performance, but high performance in different ways. They are designed for different applications.
Honestly I don't think that either driver is ideally suited for this range. 1.2 k is asking a lot for a 15" woofer, even a very good one, and it will be well into cone break up by that frequency. As for the Purifi 10" woofer, if you high pass filter it at 120 Hz, you are not really using it to its full capability.
If you are looking for high sensitivity, efficiency, and pistonic operation from 120 up to 1.2k, the right driver is probably an array of PTT6.5NAA . An array of 4 of them in series-parallel will give you a lot of Sd, sensitivity, and power handling. There is probably an appropriate EighteenSound driver(s) that can run this range as well.
Thank you, this is really helpful.
I was wondering exactly this. So I could go with an array of drivers to solve this.
When looking at the data the purifi didn't seem to have cone breakup until after 2khz, maybe I missed something?
How about if I move the crossover down to 800hz? Will the 15" 18sound or 10" purifi work?
I was wondering exactly this. So I could go with an array of drivers to solve this.
When looking at the data the purifi didn't seem to have cone breakup until after 2khz, maybe I missed something?
How about if I move the crossover down to 800hz? Will the 15" 18sound or 10" purifi work?
Right thank you.
Do you have an example so I can do some reading and get familiar with this type of data please.
Do you have an example so I can do some reading and get familiar with this type of data please.
The closest I found was the 8" purifi from Erin.
Where would you say this shows cone breakup? 1khz at deviation or 2.5khz because it's smooth until then?
Edit:
I did find this for 10" now.
Where would you say this shows cone breakup? 1khz at deviation or 2.5khz because it's smooth until then?
Edit:
I did find this for 10" now.
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You can definitely get away with a 800 hz crossover with a large format compression drivers.
An array of 6" Purifi or Kartesian vKi would be an excellent low/no compromise direct radiator solution for 80hz to 800hz.
An array of PHL, BMS, or 18 Sound 6"-8" would be great as well.
Or you can use any number of the countless quality 10" - 15" prosound midbasses on the market.
Depends how much you want to spend.
An array of 6" Purifi or Kartesian vKi would be an excellent low/no compromise direct radiator solution for 80hz to 800hz.
An array of PHL, BMS, or 18 Sound 6"-8" would be great as well.
Or you can use any number of the countless quality 10" - 15" prosound midbasses on the market.
Depends how much you want to spend.
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Thanks,
I have an array with 12 x 6" drivers. The drivers are oem and I don't have much information on them. Currently they are used from 80hz to 500hz. May be I can measure to get their polar measurements and from their work out their usable bandwidth frequency. This might give an indication before I buy anything.
In stead of a large number of drivers in the array I was hoping the 2 x 10" purifi would be enough.
I have an array with 12 x 6" drivers. The drivers are oem and I don't have much information on them. Currently they are used from 80hz to 500hz. May be I can measure to get their polar measurements and from their work out their usable bandwidth frequency. This might give an indication before I buy anything.
In stead of a large number of drivers in the array I was hoping the 2 x 10" purifi would be enough.
They would if they meet your spl needs...they have so much xmax and low distortion that you can run them low and overlap with subs if needed.
You might not need subs at all if you can get smooth bass response from your listening position.
You might not need subs at all if you can get smooth bass response from your listening position.
Thanks ErnieM,
I also thought about overlap with the subs.
I am considering the 4" beryllium 18sound or Radian. Looks like due to beryllium shortage there is a 10 month wait, maybe it's more likely to find a 3".
I just want to ensure everything below the hf crossover I. E. 800hz to the sub 120hz it's got enough to keep up with the hf driver.
I also thought about overlap with the subs.
I am considering the 4" beryllium 18sound or Radian. Looks like due to beryllium shortage there is a 10 month wait, maybe it's more likely to find a 3".
I just want to ensure everything below the hf crossover I. E. 800hz to the sub 120hz it's got enough to keep up with the hf driver.
4 inch compression driver like JBL 2450 , Beyma 850N , 18sounds 4015, Radian 950PB , Celestion Axi , or BMS Coaxial will go down to 500HZ easily to mix with a good 15 inch like JBL 2216ND , TAD 1601 , SUPRAVOX 380 , AE TD15 .
"PTT10.0X04-NAB-01 (or even 2 of these) vs the 18sound 15NTLW3500"
So no limits of budget? One Purifi at 900Euro or one 18sound at 500Euro!
With 2x 18sound in a 80-100L sealed box, you will finally catch up with a compressor driver. Then you have 1600Euro to spend for subwoofers! Though using this with proper amps at 50% capacity will get you evicted😆
So no limits of budget? One Purifi at 900Euro or one 18sound at 500Euro!
With 2x 18sound in a 80-100L sealed box, you will finally catch up with a compressor driver. Then you have 1600Euro to spend for subwoofers! Though using this with proper amps at 50% capacity will get you evicted😆
as pointed out: 15” simply starts beaming too much and is not needed if high passed at 120Hz. The PTT10.0X is also overkill from a volume displacement point of view. The PTT8.0X mentioned is a could fit: breakup at around 4kHz and good dispersion at 1.2k. It has the lowest midrange distortion of all PTT drivers. The kink/dip at 1kHz in Erin’s plot is a bit strange. Does not show up like that in independent measurements. There is probably a well damped surround resonance at this frequency.
The 15 would need to move less then the 10" more for the same output. The 15" i suspect would have better group delay? Maybe indicating better transient response with the 15"?
Anyone?
Anyone?
