No. Fastness is related to spl level and the hability to stay flat towards the highs. Again, bigger cone moves slower than little cone to reach the same spl level because it has less distance to cross to do so.
The 15PR400 is a pretty good 15" woofer. As you've stated, it's very clean up to 1khz and beyond. I find the midbass response to be more than adequate for high SPL level listening. I use it in a larger sealed enclosure. No complaints or regrets for my use (+6000 cu. ft. room). It's very well suited for large format 2 ways ... whereas the K140 may not have the mid range qualities needed for such an arrangement. Choosing which one depends on what the design calls for.
Some actual data on the K140:http://www.audioheritage.org/vbulle...and-aplication&p=351490&viewfull=1#post351490
Last edited:
Yes maybe it is rigth. PA drivers and old drivers have big VAS.
Modern drivers are made for low Fs and littlier VAS.
Between a Seas 24RLYO ands its 20 liters needed and the Faital 12PR320 maybe more towards 75l load needs. And 500 hz your need, I will not throw a definitive conclusion.
Ok the Seas has heavy metal cone but also break ups according the slope you want in your filter. Faitals more linear in the highs...
If I rember the wop24 was tested in the site justdiyit.
And tour room is difficult: perfect square and low ceilling...I would not put a 15 in this, but just my opinion.
If vented is for you, maybe have a look to what Mbrenwa member made in his Open Source Monkey Box with that 12 Faital...the cut off should be close to what your are needing with the 500 hz.
Just 2 cents...there are many ways to skin a cat as members already imputed above.
Last edited:
It depends on the application. 15" mid driver is logical choise if one wants have narrow directivity speaker, just for directivity. Nice bonus is that cone area is huge (15" equals roughly three 10") so excursion stays low and non-linear distortion does not become an issue in home use, sensitivity is high and also amplifier non-linear distortion stays at bay. Then, choose driver that has least amount of problems in the passband, like edge resonance. Whats your passband, the application? Do not sacrifice midrange performance for low bass, because one can always add more woofers to make better low bass which would also make sense to take control of response in room modal region.
10" drivers are fine if it suits a system directivity and SPL requirements. Any driver size is fine that is proper size for the system at hand. Comparing 10" driver to 15" without system context is pointless as they have very different properties just in the size alone, before even touching motors or moving mass. If its for subwoofer duty then go biggest you can fit and afford, displacement is king.
Last edited:
Narrow directivity in the higher frequencies then. Because below Schroeder room frequrncy...often below 250 to 300 hz, room dominates and driver is more 2Pi radiating towards the lows anyway.
You re rigth, what the size of the uper cone or driver is what the filter cares...idealy.
You re rigth, what the size of the uper cone or driver is what the filter cares...idealy.
Then why don't people use 15" up to 1500Hz, like they do with 10"? Devore Orangutan O/96 is the example I am thinking about.
When I say faster, I mean it can play midrange without distorting into cardboard ugliness.
Due to directivity, 15" starts narrowing response much below 1000hz and no direct radiating tweeter can crossover so low. Even 10" is too big to be crossed over to 1" direct radiating tweeter without issues, power response dip. Then all the cone resonances are lower in frequency the bigger the cone is. Many reasons.
However, with waveguide it doesn't matter that much as the narrowing directivity allows the tweeter to play lower, also bigger tweeter can be used (compression driver) which again lowers possible crossover point. Its just matching directivity of the waveguide to a woofer or to another waveguide for example. 15" can be crossed over to 1" compression driver in roughly 15" waveguide.
However, with waveguide it doesn't matter that much as the narrowing directivity allows the tweeter to play lower, also bigger tweeter can be used (compression driver) which again lowers possible crossover point. Its just matching directivity of the waveguide to a woofer or to another waveguide for example. 15" can be crossed over to 1" compression driver in roughly 15" waveguide.
Last edited:
Even it's center I doubt a 15" can match the quality of the midrange from a 10" woofer. Maybe a very special vintage 14-15" can do it.
It could be so but the midrange is affected by all possible problems loudspeakers have it is impossible to say or state without context, very hard to compare even with context. Biggest difference is in the directivity, both require different crossover points for similar shape of polar pattern but still they would be at different frequency (or different polar pattern if crossover was on same frequency) and now hearing system perceives stuff differently and what not.
I bet that good sounding system can be made with either, or with any other size drivers, but the systems would be different in many ways. Each could be better than others for some application.
I bet that good sounding system can be made with either, or with any other size drivers, but the systems would be different in many ways. Each could be better than others for some application.
In my case I crossover at 25-210Hz, so even if I use a 10" I don't believe ultimate fidelity comes from a 2-way of any size. I should probably cross higher than 25Hz and use a few dedicated subwoofers. But right now it just works and it has enough bass for my small room. The 15" drivers I have tried has not been able to reach 30Hz in the manner of the Seas Excel Nextel W26FX002 10" easily did. I would need a huge 150-170L box to make the 15PR400 do anything similar. I tried it in 75L, ported.
Yeah for subwoofer / bass duty with few hindred hertz crossover 10" or 15" no difference in directivity, only in displacement and overall system size, and with max SPL capability. 15" box is much bigger but would take loads of amplifier power and play much much louder than a 10". If 10" has enough SPL capability for the application (before distortion) then there is no need to go bigger.
Last edited:
After hearing jbl horn and gt sound in Japan , I think the key of ultimate two way requires compression drive.
Although it lack the realistic human voice fullness dynaudio consequence presented, the overall the dynamics in real life soundstage is hard to beat.
Not so lucky. Huge peak at 43Hz. I wish it was a little bit taller (I wish I was a baller) and 5 x 5 m. They have resonance peaks at 30-35 Hz. Lucky bastards.
Last edited:
I doubt a Dynaudio D52 dome midrange can compete with a $10000 Goto compression driver.
Last edited:
So their coils are larger and can handle higher temperatures. Why would distortion be higher in a more robust driver?
This is what I get for challenging the 15" consensus with my personal experiences.
I forgot to mention (because it was so bad) that I recently tried a modern 15" woofer.
https://www.bcspeakers.com/en/products/lf-driver/15-0/8/15fw76
It was the worst on my list, and I am soon rebuilding it to wooden cone and thread spider, because why not, and I like the size of the magnet.
Last edited: