Improving off-axis response of a 15"

alexclaber · 21st March 2008, 01:09 PM

Am thinking about ways to make a single 15" cab viable for bass guitar use without losing all the clarity in the mids and lower treble off-axis. Options for improving this response see to be some kind of whizzer cone attached to the dustcap or some kind of waveguide/dispersion thingummy mounted in front of the driver. Any suggestions for DIY approaches worth trying?

Alex

pjpoes · 21st March 2008, 01:12 PM

well you can make your own dispersion device to go infront of the driver. None the less, a 15" woofer is never going to have good dispersion off axis. A lot of guys who like 15's will mix them with 4-10's and/or a tweeter. You might find that adding a single horn tweeter crossed over at 3-4khz to be a nice way to keep from losing that clarity you want.

Brett · 21st March 2008, 01:57 PM

Either accept it the way it is, as dispersion is determined in large part by the driver size and cone shape, or bite the bullet and add another driver above it. Lots of good possibilities for that incl 6, 8 and 10" drivers. A 4x10 above a 15 is a WOFTAM.

Go to Talkbass, Amps forum and search thread titles under "Boutique". Go to Pt 2 and use Greenboy's design near the end of the thread.

AndrewT · 21st March 2008, 02:15 PM

yes, add another driver with it's own amp.

mashaffer · 21st March 2008, 10:19 PM

Hawthorne Silver Iris.

mike

Brett · 21st March 2008, 11:10 PM

Quote:

Originally posted by mashaffer
Hawthorne Silver Iris.

mike

Not suitable for bass guitar. I'd kill one easily.
A Pro coax would be fine though, but they can be expensive.

alexclaber · 21st March 2008, 11:24 PM

I'm already building myself a 2-way cab with 15" woofer and 6.5" mid (greenboy and I have been cross-pollinating bass cab ideas for a couple of years) but I was hoping to make a cheaper and even lighter cab available using the Kappalite 3015 as that goes high enough on-axis to work ok without a midrange speaker. I totally agree that a 15" isn't ideal for the mids but I'm just wondering if one can at least make it work better!

Alex

Magnetar · 21st March 2008, 11:30 PM

A Karlson cabinet will open it up plus the bass will get better.

http://gainclone.com/Karlson/index.php?board=1.0

Brett · 21st March 2008, 11:37 PM

Quote:

Originally posted by alexclaber
I totally agree that a 15" isn't ideal for the mids but I'm just wondering if one can at least make it work better!

Alex

No. Old school or 2 way. These are your options.

alexclaber · 22nd March 2008, 10:54 AM

Quote:

Originally posted by Brett
No. Old school or 2 way. These are your options.

3rd option: Whizzer cone?

Alex

21st March 2008, 01:09 PM	#1
alexclaber diyAudio Member Join Date: Jan 2005 Location: Brighton	Improving off-axis response of a 15" Am thinking about ways to make a single 15" cab viable for bass guitar use without losing all the clarity in the mids and lower treble off-axis. Options for improving this response see to be some kind of whizzer cone attached to the dustcap or some kind of waveguide/dispersion thingummy mounted in front of the driver. Any suggestions for DIY approaches worth trying? Alex

21st March 2008, 02:15 PM	#4
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	yes, add another driver with it's own amp. __________________ regards Andrew T.

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21st March 2008, 01:12 PM	#2
pjpoes diyAudio Member Join Date: Jan 2005 Location: New York	well you can make your own dispersion device to go infront of the driver. None the less, a 15" woofer is never going to have good dispersion off axis. A lot of guys who like 15's will mix them with 4-10's and/or a tweeter. You might find that adding a single horn tweeter crossed over at 3-4khz to be a nice way to keep from losing that clarity you want.

21st March 2008, 01:57 PM	#3
Brett diyAudio Member Join Date: Jan 2002	Either accept it the way it is, as dispersion is determined in large part by the driver size and cone shape, or bite the bullet and add another driver above it. Lots of good possibilities for that incl 6, 8 and 10" drivers. A 4x10 above a 15 is a WOFTAM. Go to Talkbass, Amps forum and search thread titles under "Boutique". Go to Pt 2 and use Greenboy's design near the end of the thread.

21st March 2008, 10:19 PM	#5
mashaffer diyAudio Member Join Date: Jun 2004 Location: Indiana	Hawthorne Silver Iris. mike

21st March 2008, 11:24 PM	#7
alexclaber diyAudio Member Join Date: Jan 2005 Location: Brighton	I'm already building myself a 2-way cab with 15" woofer and 6.5" mid (greenboy and I have been cross-pollinating bass cab ideas for a couple of years) but I was hoping to make a cheaper and even lighter cab available using the Kappalite 3015 as that goes high enough on-axis to work ok without a midrange speaker. I totally agree that a 15" isn't ideal for the mids but I'm just wondering if one can at least make it work better! Alex

21st March 2008, 11:30 PM	#8
Magnetar Banned Join Date: Feb 2004 Location: Portal 2012	A Karlson cabinet will open it up plus the bass will get better. http://gainclone.com/Karlson/index.php?board=1.0

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