Hello everyone.
Seek your inputs on choice of loudest possible driver for voice / speech applications which can fit in a sub 2-inch diameter circular cutout.
Weather and ingress protections are highly desirable due to nature of the application.
Presently, have homed on to the following: -
https://www.parts-express.com/Visaton-PL5RV-1-5-8-Full-Range-Driver-4-Ohm-292-636?quantity=1
However, cost being no object, want something which can go really really loud.
Seek your inputs on choice of loudest possible driver for voice / speech applications which can fit in a sub 2-inch diameter circular cutout.
Weather and ingress protections are highly desirable due to nature of the application.
Presently, have homed on to the following: -
https://www.parts-express.com/Visaton-PL5RV-1-5-8-Full-Range-Driver-4-Ohm-292-636?quantity=1
However, cost being no object, want something which can go really really loud.
By loudest you mean the highest output, not the most sensitive?
Can it be bigger than 2" if the cutout is only 2"?
Will you cross it so it doesn't play bass?
Can it be bigger than 2" if the cutout is only 2"?
Will you cross it so it doesn't play bass?
first of all thanks a ton for helping out.
loudest = highest SPL, i.e. best combination of power and sensitivity.
yes, and anything else possible to increase loudness and intelligibility of voice / speech in a noisy background.
It can be, but not much... say 2.5-inch max. the baffle is a metal plate with limited space.
GM, thanks to start with. I will be using a capacitor in series to block the bass.
a series capacitor can "boost" and exacerbate cone excursion when working against a driver/system LF Z peak so keep that in mind.
Sensitivity doesn't matter then, you just need a bigger amplifier to do the same thing.. 😉
just want to generate the maximum possible volume without losing clarity of speech. amplifier power is not an issue.
OK, so that's 'maximum undistorted output'.
Since you are constrained at speaker size, the search is for a driver that will be able to output the maximum output level.
I don't really know which parameter in a spec sheet that would be.
Probably max SPL with 1W (or whatever reference) input?
Jan
Since you are constrained at speaker size, the search is for a driver that will be able to output the maximum output level.
I don't really know which parameter in a spec sheet that would be.
Probably max SPL with 1W (or whatever reference) input?
Jan
jan.didden, basic engineering tells me that max extractable SPL from a loudspeaker will be proportional to its sensitivity (SPL at 1W at 1m) and power rating. since the first figures is in DB (ratio) and second is a unit, some conversion will be required. if both are converted to DB, they can simply be added, else need to be multiplied.
but in a loudspeaker, other factors like Xmax may get exceeded before you can extract that loudness. hence, it may not be as simple, and enclosure / environment will play a big role. to complicate further, which power rating will be relevant - maximum or program?
overall, it can be complicated.
but in a loudspeaker, other factors like Xmax may get exceeded before you can extract that loudness. hence, it may not be as simple, and enclosure / environment will play a big role. to complicate further, which power rating will be relevant - maximum or program?
overall, it can be complicated.
Good points. What you're saying is that there's no simple way to find the driver that will be loudest. It depends.
Jan
Jan
If you fix your constraint to a 2” diameter piston, then sensitivity, power handling and excursion all help.
At higher frequencies excursion matters less. So then thermal power handling eg. Voice coil size and number of turns matter. But the bigger the voice coil the high the moving mass so then and sensitivity goes down. So you need a lighter cone/suspension. eg. Mms and more powerful motor eg. BL
At low frequencies its Vd matters more.
http://www.baudline.com/erik/bass/xmaxer.html
Here’s a shortlist:
http://www.loudspeakerdatabase.com/search/1.6_size_in_2.0/sort=-xmax
My votes are for-
At higher frequencies excursion matters less. So then thermal power handling eg. Voice coil size and number of turns matter. But the bigger the voice coil the high the moving mass so then and sensitivity goes down. So you need a lighter cone/suspension. eg. Mms and more powerful motor eg. BL
At low frequencies its Vd matters more.
http://www.baudline.com/erik/bass/xmaxer.html
Here’s a shortlist:
http://www.loudspeakerdatabase.com/search/1.6_size_in_2.0/sort=-xmax
My votes are for-
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Maybe some 8cm driver put against the opening will maximize output?
If it's possible due to space.
Visaton fr87 and other drivers of similar size.
https://www.visaton.de/de/produkte/chassis/breitband-systeme/fr-87-4-ohm
If the opening is so small, make vibrate with a DML Exciter some surface?
If it's possible due to space.
Visaton fr87 and other drivers of similar size.
https://www.visaton.de/de/produkte/chassis/breitband-systeme/fr-87-4-ohm
If the opening is so small, make vibrate with a DML Exciter some surface?
If it has some large flat surfaces you might look into exciters instead of speakers. Make the whole thing a speaker!
Assuming a direct radiator
Sensitivity for 2" drivers is rather limited.
81 to 84 dB
Max thermal typical to 15 to 40 watts.
Linear excursion 1 to 3mm
Drivers with high xmax make the usual tradeoff
of less senstivity, so max SPL over a broad range of products
on paper may seem better / worse.
But overall Max SPL relatively the same.
Outdoor applications will use a more weatherproof
cone. And usual coated frame
Misco specializes in outdoor waterproof cones
and has numerous 3" speakers for voice range.
Sensitivity also much higher around 84 to 88 dB
Such as Part # RDC3WI
Misco Outdoor 3"
Otherwise outdoor voice would be voice range Horn
Since direct radiators very limited in SPL
3" wont get close to 110 dB at full power
and most horns easily do that at 1 watt
And can go up to 115 to 120 dB
with 10 to 20 watts
DK 8P
Far as direct radiator 91 dB
Faital Pro 3FE25
Or Celestion AN2075
Sensitivity for 2" drivers is rather limited.
81 to 84 dB
Max thermal typical to 15 to 40 watts.
Linear excursion 1 to 3mm
Drivers with high xmax make the usual tradeoff
of less senstivity, so max SPL over a broad range of products
on paper may seem better / worse.
But overall Max SPL relatively the same.
Outdoor applications will use a more weatherproof
cone. And usual coated frame
Misco specializes in outdoor waterproof cones
and has numerous 3" speakers for voice range.
Sensitivity also much higher around 84 to 88 dB
Such as Part # RDC3WI
Misco Outdoor 3"
Otherwise outdoor voice would be voice range Horn
Since direct radiators very limited in SPL
3" wont get close to 110 dB at full power
and most horns easily do that at 1 watt
And can go up to 115 to 120 dB
with 10 to 20 watts
DK 8P
Far as direct radiator 91 dB
Faital Pro 3FE25
Or Celestion AN2075
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Thank you for the inputs mates. Deeply appreciate one and all.
Went with the default choice, i.e.: -
https://www.parts-express.com/Visaton-PL5RV-1-5-8-Full-Range-Driver-4-Ohm-292-636?quantity=1
Got a sample and it is very easy to mount, has great looks, provides weather protection, comes with a capacitor and wire attached, and is quite loud for voice applications. Though, did blow one of them by overpowering during testing 🙂
Went with the default choice, i.e.: -
https://www.parts-express.com/Visaton-PL5RV-1-5-8-Full-Range-Driver-4-Ohm-292-636?quantity=1
Got a sample and it is very easy to mount, has great looks, provides weather protection, comes with a capacitor and wire attached, and is quite loud for voice applications. Though, did blow one of them by overpowering during testing 🙂