Hello,
Apologies if this is too simple or has been asked before, I did look but could not find. Is there a way to set up 2 drivers so that:
One rolls LF off naturally, the other has HP filter set so that the net result of both drivers together is greater LF extension (combined higher amplitude at lower frequency) than if both drivers were simply connected in parallel.
Is this credible, and if so, is it used commonly?
Thanks
Isaac.
Apologies if this is too simple or has been asked before, I did look but could not find. Is there a way to set up 2 drivers so that:
One rolls LF off naturally, the other has HP filter set so that the net result of both drivers together is greater LF extension (combined higher amplitude at lower frequency) than if both drivers were simply connected in parallel.
Is this credible, and if so, is it used commonly?
Thanks
Isaac.
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Sorry if I'm reading this incorrectly, but if one has a HPF, then they'll sum in the midbass/mids, not in the LF.
If you meant LPF on one driver, then yes it would work, same as it does for a 0.5 way in a conventional box speaker.
I may have read it wrong as I've broken my specs and am reading on a small screen.
If you meant LPF on one driver, then yes it would work, same as it does for a 0.5 way in a conventional box speaker.
I may have read it wrong as I've broken my specs and am reading on a small screen.
Thank you.
Ah, sorry, and yes.. I mean HPF - let the low frequencies through!..
Is anyone aware of online calculator I can use to work this through, or even a simple formula?.
Thanks again.
Ah, sorry, and yes.. I mean HPF - let the low frequencies through!..
Is anyone aware of online calculator I can use to work this through, or even a simple formula?.
Thanks again.
No, low freq output doesn't benefit anything compapred to both playing same signal.
This kind of arrangement is often called .5 "way" and it is used to baffle step compensation and to get lower bass distortion compared to a single driver. A 2-way system made to 2.5 will get most benefit from this, better acoustic match to tweeter than two stacked woofers.
Open baffle bass will need lots of compensation, and .5 might give some help if 2x15" system is asked to play higher than say 500Hz. But, if done passively, one must get a helluva huge coil...
This kind of arrangement is often called .5 "way" and it is used to baffle step compensation and to get lower bass distortion compared to a single driver. A 2-way system made to 2.5 will get most benefit from this, better acoustic match to tweeter than two stacked woofers.
Open baffle bass will need lots of compensation, and .5 might give some help if 2x15" system is asked to play higher than say 500Hz. But, if done passively, one must get a helluva huge coil...
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HPF = High Pass Filter.
ie, high frequencies are passed, and low frequencies are blocked.
Your best bet is to measure each driver in turn and load the curves into XSim or similar.
Alternatively, a passive crossover calculator will give you some ideas of values.
Chris
the problem with a 0.5 way is phase shifts which can lead to problems or at least a lot more difficult integration with the midrange drivers because you are adding an additional crossover point. Just using them in paralell and us EQ to compensate for the roll-off most probably leads to better results, at least that was my experience.
Thanks for the responses.
It seems that there is nothing to gain from doing this if using a plate amp with DSP etc.
I have another related question but probably best suited to another post.
Thanks again.
It seems that there is nothing to gain from doing this if using a plate amp with DSP etc.
I have another related question but probably best suited to another post.
Thanks again.
Using a passive HPF on one of two drivers has the benefit of providing the desired response using only a single channel of DSP/amplification.
Regarding "phase shifts which can lead to problems", rolling off the HF response of one of the woofers ges not affect the phase of the driver not using the filter, integration with the midrange drivers can be more seamless as the number of point sources in the acoustic crossover region are reduced.
So I bought 4x 15PR400 drivers and two miniDSP ICE125 plate amps..
Anyone familiar with the Linkwitz LXsub4 arrangement (bottom page) LXmini-woofer
My thought is that I can try this arrangement, and if it sucks, I can build either a straight mid bass horn (volvotreter or inlow), or LaScala.
Anyone familiar with the Linkwitz LXsub4 arrangement (bottom page) LXmini-woofer
My thought is that I can try this arrangement, and if it sucks, I can build either a straight mid bass horn (volvotreter or inlow), or LaScala.