Hi guys!
First of all, I apologize for my ignorance...but I'm a newbie.
Iìd like to combine two Monacor SP-205 fullrange for each cabinet (a sort of "array system").
This Monacor fullrange has a low frequency of just 100Hz, so my question is:
do you get a lower frequency response by using two Monacor SP-205 for each cabinet?...in other words, I mean: do the low frequencies range increase with two drivers in the same cabinet or they don't change at all?
Thank you for your kindness.
Best regards
First of all, I apologize for my ignorance...but I'm a newbie.
Iìd like to combine two Monacor SP-205 fullrange for each cabinet (a sort of "array system").
This Monacor fullrange has a low frequency of just 100Hz, so my question is:
do you get a lower frequency response by using two Monacor SP-205 for each cabinet?...in other words, I mean: do the low frequencies range increase with two drivers in the same cabinet or they don't change at all?
Thank you for your kindness.
Best regards
Using 2 FR drivers does not get you any lower, it only gets you more. You do have to worry about HF combing, the usual way to deal with that is to filter one driver so that it does not play at HF. This pdf covers off the 2 filter possibilities.
http://www.planet10-hifi.com/downloads/Dual-Driver-Wiring.pdf
dave
http://www.planet10-hifi.com/downloads/Dual-Driver-Wiring.pdf
dave
It depends, if the cabinet is the same size then they are effectively each in a cabinet of half the size, so the system Q will have changed
Dual 8" ?
Dave is right.
I leveled my dual 4" (5" frames) with pennies at 10'.
Vertical sweet spot was so small, i couldn't hunch without losing past 5khz.
Smaller than 8" full range was the vert sweet spot.
I have a theory that you can array 12's, but i sold mine and can't tolerate a 55" tall box.
I'm a bass head and have been trying to increase bass to full ranges.
Dave is right.
I leveled my dual 4" (5" frames) with pennies at 10'.
Vertical sweet spot was so small, i couldn't hunch without losing past 5khz.
Smaller than 8" full range was the vert sweet spot.
I have a theory that you can array 12's, but i sold mine and can't tolerate a 55" tall box.
I'm a bass head and have been trying to increase bass to full ranges.
double horns
Hello,
why do you chose that driver, no data, expensive for the quality,
easy make a coil ~8 mH at + of the seccond driver.
Look your country look SICA.
in my double horns you can increase the bass around one oktave deeper in Bass,
your driver is not useful in horns.
Hello,
why do you chose that driver, no data, expensive for the quality,
easy make a coil ~8 mH at + of the seccond driver.
Look your country look SICA.
in my double horns you can increase the bass around one oktave deeper in Bass,
your driver is not useful in horns.
Attachments
Using two drivers will allow you to EQ the low end more to your liking without running into trouble as soon as with one.
In other words you increase dynamic range.
Using two drivers, it's a terrible waste to low pass filter one of the drivers.
Instead you have a chance to improve directionality of the top end.
To combat attenuation due to interference in the highs do one of the following:
- Splay the drivers (angle them out from each other horizontally).
- Put the drivers one above the other as close as possible. That will limit the radiation pattern vertically which can be beneficial in certain settings and is was to accommodate in many cabinets.
- Finally, you could put one of the drivers on the back in bipole setup to have it reflect of a hard back wall.
In other words you increase dynamic range.
Using two drivers, it's a terrible waste to low pass filter one of the drivers.
Instead you have a chance to improve directionality of the top end.
To combat attenuation due to interference in the highs do one of the following:
- Splay the drivers (angle them out from each other horizontally).
- Put the drivers one above the other as close as possible. That will limit the radiation pattern vertically which can be beneficial in certain settings and is was to accommodate in many cabinets.
- Finally, you could put one of the drivers on the back in bipole setup to have it reflect of a hard back wall.
This has been quite effective with the microTower Castle builds, one driver forward firing, the other facing up Ooptionally with the top panel canted slightly forward). Chris is just about to embark on another version of these for his living room (i think it will be iteration #3).
dave
Wouldn’t that be vertically then? I was thinking more along Time Window or Epicure MT1.
But still yeah, that’s another approach.
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2 FR drivers does get you lower, if you use a 1.5 configuration. That means, you take out one driver fairly low with a coil. Using 2 in parallel isn't advised because you'll get interferences and you'll lose the main reason to use a FR anyway because you don't have a point-sound-source anymore.
No, that's completely wrong! Doing 1.5 does not give you more headroom in THD, IMD or power. None of it. The one driver still has to do the same work, the same excursion, the same power, the same frequency range. You either get more bass SPL or deeper bass, depending on your XO and enclosure. So, no, it does not give you 'more'. You clearly have no concept about how a .5 system works.
I am of course assumming the same enclosure parameters, ie 2x the box size.
If you use a parallel filter on the 1.5 you get 6 dB more bass, usually too much so EQed down you have less power flowing to the drivers, if you do not, then yes the same excursion etc but 6 dB louder.
If you use the series configuation the levels remain the same but driver excursion falls to a forth and you can turn everything up more before encountering the same excursion, etc as a single driver.
dave
If you use a parallel filter on the 1.5 you get 6 dB more bass, usually too much so EQed down you have less power flowing to the drivers, if you do not, then yes the same excursion etc but 6 dB louder.
If you use the series configuation the levels remain the same but driver excursion falls to a forth and you can turn everything up more before encountering the same excursion, etc as a single driver.
dave
No, it won't be louder, only in the bass!
That's also wrong! It's only the case if you let them both run over the full range. But then you won't have a point source anymore, you will have interferences from the upper mid and higher and you won't have deeper basse either.
I'm actually quite sad you cannot grasp the concept of a 1.5 (or 2.5) system. I did not expect that inability from you.
Please stop it with the point source. YOU clearly have no idea of who you’re addressing.
The Qts of the drivers is still the same. Same sound in the same cab.
Only difference is dynamic range.
What happens outside the box is a different matter, but that’s not the main issue here.
The Qts of the drivers is still the same. Same sound in the same cab.
Only difference is dynamic range.
What happens outside the box is a different matter, but that’s not the main issue here.
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From the document i posted earlier it should be clear that i meant 6dB only below the turn over point of the filter.
I well understand 1.5 way. In the series configuration, the extra efficiency of 2 drivers is countered (close to exactly) by the decreased power at LF due to the system impedance doubling… half the power going in and that now split between 2 drivers. So each driver gettin a forth the power, so one can play 6dB louder before running into the same power level limits as a single driver )since those limits are almost always in the bass).
When using a parallel filter one needs to be very careful to set the filter point at or below the baffle step point to use baffle step to cancel (at leasty partially) the gain in level — best done in a room aided by measurement
In the series connection the where is much less critical, just needs to be below the quarter wave-length of the centre-to-centre of the 2 drivers.
I rarely find the need for, or use BSC so the series connection makes the most sense for me.
dave
I well understand 1.5 way. In the series configuration, the extra efficiency of 2 drivers is countered (close to exactly) by the decreased power at LF due to the system impedance doubling… half the power going in and that now split between 2 drivers. So each driver gettin a forth the power, so one can play 6dB louder before running into the same power level limits as a single driver )since those limits are almost always in the bass).
When using a parallel filter one needs to be very careful to set the filter point at or below the baffle step point to use baffle step to cancel (at leasty partially) the gain in level — best done in a room aided by measurement
In the series connection the where is much less critical, just needs to be below the quarter wave-length of the centre-to-centre of the 2 drivers.
I rarely find the need for, or use BSC so the series connection makes the most sense for me.
dave
Ah, well, the only reason you want to create a 1.5 system is acutally to keep the point source. That's in- and outside the the box the same but actually matters outside. Oh and that doesn't matter who I'm adressing since the physics apply if you are 'addressing' it or not.
not that it matters, but jbl had a paper showing as you double the drivers, the excursion halves, and the harmonic distortion drops to a quarter.
I liked my dual 4" run wide open versus using 1 driver as baffle step.
Baffle step is tricky because the Impedence usually goes up, but not always on some drivers.
I found baffle step woofer made zero help at tv volumes, it helped louder, and really made a difference at beyond 105db or so.
I liked my dual 4" run wide open versus using 1 driver as baffle step.
Baffle step is tricky because the Impedence usually goes up, but not always on some drivers.
I found baffle step woofer made zero help at tv volumes, it helped louder, and really made a difference at beyond 105db or so.
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