Biggest Spl Per £

bob123 · 23rd April 2006, 06:06 PM

Hi, i have recently blown a bass driver for my sub,

Can anyone recomend a very sensitive budget driver?
Bass response down to bout 40hz, 500-1000w, 15".
So far im looking at the eminence drivers.

Rademakers · 23rd April 2006, 06:37 PM

What are the enclosure specifications of your sub?

Wkr Johan

bob123 · 23rd April 2006, 06:53 PM

200 litres. 18mm mdf
1 x 0.5 x 0.5 Meters
Bass reflex tuned to 40hz. (5 ports rear firing)

Rademakers · 24th April 2006, 07:15 AM

Are you using it at home or as PA (it seems a bit big for that usage) or any other special SPL requirement? Eminence has some suitable drivers but they will about all introduce a powerdip even in a normal sized enclosure. In 200 ltrs tuned to 40 Hz about every 15" PA speaker will have a powerdip making it easy to keep blowing your speakers. Especially with budget drivers.

Wkr Johan

bob123 · 24th April 2006, 02:31 PM

it is for PA. i would like a very high SPL at about 50 - 100Hz (to give that resonance feeling in the chest). My old drivers were absolutly S***. I think they were about 90db/w/m.

Any suggestions? i have about £100 to spend on it but it would be prepared to spend more if a MUCH better driver is at a slight increase in cost.

Rademakers · 24th April 2006, 08:39 PM

For PA usage your current box is pretty big, it would actually almost be more suited as a double 15" reflex. Most 15" PA speakers perform best in a 80 - 140 ltr cab.
For kick you can tune a bit higher say 45-50 Hz. Your chest/lungs (if fullgrown) will resonate around 120 Hz, so cross around there or a bit over, it will make the speaker sound louder anyway.

From Eminence the Kappa 15LF will show good value for the money. Any series beneath it lacks Xmax (that's bad).
It will be around 95 dB/W/m. In your cab as it is 300 Wrms will be about the max. power it can handle. 110 ltr tuned to 47 hz would raise the powerhandling with about 200 watts. In any case it would be a big step up form what you have now.

You might be interested in going hornloaded by the way. You could easily raise the sensitivity over 100 dB/W/m

and still have a cab of equal size. If you're in for high SPL but on a budget it's the way to go.

Wkr Johan

bob123 · 24th April 2006, 09:27 PM

my cab does have twin drivers! but i have blown one of them.
Also could i reduce the volume by putting an object inside the cab?

simon5 · 25th April 2006, 07:42 AM

Yes you can put objects in the cab if they don't vibrate or move (heavy things, better if you glue them). It's a bit of a waste of space, better to get two drivers or build a new cab hehe!

dangus · 25th April 2006, 07:48 AM

The Omega Pro 15" should take some abuse; 4 inch voicecoils. Bigger voice coils dissipate more heat. The Magnums or the Kilomax look nice too. I don't know if any of those are suitable as horn drivers.

Blocks of styrofoam would do to take up volume; you want something stiff but light, unless you don't need to move the cabinet.

Check out: http://www.speakerplans.com/index.php?id=home

The Kappa 15LF is one of the suggested drivers for this cabinet:
http://www.speakerplans.com/index.php?id=hd15horn

I'm tempted to build a couple of these since I have the Omega 18's already: http://www.speakerplans.com/index.php?id=186horn

bob123 · 25th April 2006, 05:31 PM

What is the gain in db of a typical horn?
Is there a downside apart from size of building a horn?

23rd April 2006, 06:06 PM	#1
bob123 diyAudio Member Join Date: Jun 2004 Location: Southampton UK	Biggest Spl Per £ Hi, i have recently blown a bass driver for my sub, Can anyone recomend a very sensitive budget driver? Bass response down to bout 40hz, 500-1000w, 15". So far im looking at the eminence drivers.

23rd April 2006, 06:37 PM	#2
Rademakers diyAudio Member Join Date: Jan 2005 Location: Rotterdam, NL	What are the enclosure specifications of your sub? Wkr Johan __________________ Impossibilities we do immediatly, miracles take slightly longer.

24th April 2006, 07:15 AM	#4
Rademakers diyAudio Member Join Date: Jan 2005 Location: Rotterdam, NL	Are you using it at home or as PA (it seems a bit big for that usage) or any other special SPL requirement? Eminence has some suitable drivers but they will about all introduce a powerdip even in a normal sized enclosure. In 200 ltrs tuned to 40 Hz about every 15" PA speaker will have a powerdip making it easy to keep blowing your speakers. Especially with budget drivers. Wkr Johan __________________ Impossibilities we do immediatly, miracles take slightly longer.

24th April 2006, 08:39 PM	#6
Rademakers diyAudio Member Join Date: Jan 2005 Location: Rotterdam, NL	For PA usage your current box is pretty big, it would actually almost be more suited as a double 15" reflex. Most 15" PA speakers perform best in a 80 - 140 ltr cab. For kick you can tune a bit higher say 45-50 Hz. Your chest/lungs (if fullgrown) will resonate around 120 Hz, so cross around there or a bit over, it will make the speaker sound louder anyway. From Eminence the Kappa 15LF will show good value for the money. Any series beneath it lacks Xmax (that's bad). It will be around 95 dB/W/m. In your cab as it is 300 Wrms will be about the max. power it can handle. 110 ltr tuned to 47 hz would raise the powerhandling with about 200 watts. In any case it would be a big step up form what you have now. You might be interested in going hornloaded by the way. You could easily raise the sensitivity over 100 dB/W/m and still have a cab of equal size. If you're in for high SPL but on a budget it's the way to go. Wkr Johan __________________ Impossibilities we do immediatly, miracles take slightly longer.

25th April 2006, 07:42 AM	#8
simon5 diyAudio Member Join Date: Nov 2004 Location: Québec, Québec	Yes you can put objects in the cab if they don't vibrate or move (heavy things, better if you glue them). It's a bit of a waste of space, better to get two drivers or build a new cab hehe! __________________ DIYaudio for President !


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23rd April 2006, 06:53 PM	#3
bob123 diyAudio Member Join Date: Jun 2004 Location: Southampton UK	200 litres. 18mm mdf 1 x 0.5 x 0.5 Meters Bass reflex tuned to 40hz. (5 ports rear firing)

24th April 2006, 02:31 PM	#5
bob123 diyAudio Member Join Date: Jun 2004 Location: Southampton UK	it is for PA. i would like a very high SPL at about 50 - 100Hz (to give that resonance feeling in the chest). My old drivers were absolutly S***. I think they were about 90db/w/m. Any suggestions? i have about £100 to spend on it but it would be prepared to spend more if a MUCH better driver is at a slight increase in cost.

24th April 2006, 09:27 PM	#7
bob123 diyAudio Member Join Date: Jun 2004 Location: Southampton UK	my cab does have twin drivers! but i have blown one of them. Also could i reduce the volume by putting an object inside the cab?

25th April 2006, 07:48 AM	#9
dangus diyAudio Member Join Date: May 2004 Location: Vancouver Island	The Omega Pro 15" should take some abuse; 4 inch voicecoils. Bigger voice coils dissipate more heat. The Magnums or the Kilomax look nice too. I don't know if any of those are suitable as horn drivers. Blocks of styrofoam would do to take up volume; you want something stiff but light, unless you don't need to move the cabinet. Check out: http://www.speakerplans.com/index.php?id=home The Kappa 15LF is one of the suggested drivers for this cabinet: http://www.speakerplans.com/index.php?id=hd15horn I'm tempted to build a couple of these since I have the Omega 18's already: http://www.speakerplans.com/index.php?id=186horn

25th April 2006, 05:31 PM	#10
bob123 diyAudio Member Join Date: Jun 2004 Location: Southampton UK	What is the gain in db of a typical horn? Is there a downside apart from size of building a horn?

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