Good woofer 2-way dipole

FORNO · 3rd February 2010, 10:25 PM

Do you have any advice for a woofer that works well up to 2500..3000 Hz and that can be used for a 2-way dipole ?

I want to use it with a HEIL twitter.

Thanks for any response...

InclinedPlane · 3rd February 2010, 10:43 PM

I'm considering a similar project. I don't know what to think when I see replacement AMT diaphragms on the same sales page as the AMT unit, though. I hope they are reliable.

You're going to have to think woofer(s) as in more than one if you want to match output passively. But if biamping, I'd try the AE dipole 15. It would help if you described your listening habits, design desires and what source electronics you have.

ScottG · 3rd February 2010, 11:19 PM

Quote:

Originally Posted by FORNO

Do you have any advice for a woofer that works well up to 2500..3000 Hz and that can be used for a 2-way dipole ?

I want to use it with a HEIL twitter.

Thanks for any response...

215 SIGNATURE SUPRAVOX

FORNO · 4th February 2010, 08:51 AM

Thanks for the advice.

I've already assembled the crossover shown in figure number 2 in this PDF:

http://www.audioreview.it/documenti/...ER_DR_HEIL.pdf

The sound is very nice!

Even a friend advised me the "215 SIGNATURE SUPRAVOX.

What do you think?

el`Ol · 02:01 PM

What shall be the crossover frequency to the sub?
Is a dipole sub desired?
Wow wide will be the baffle?
What kind of amp?
Is high SPL required?

FORNO · 4th February 2010, 03:17 PM

"What shall be the crossover frequency to the sub?"

I do not know, the twetter cross cut is 2500Hz acoustic, I need help to build the woofer crossover !

"Is a dipole sub desired?"

Yes

"Wow wide will be the baffle?"

I have no space limitations

"What kind of amp?"

Densen B-150 Integrated Amplifier

"Is high SPL required?"

?

el`Ol · 4th February 2010, 05:37 PM

This is how a wide baffle looks like:
PHY-HP (Haut parleurs)® - Baffle Plan

FORNO · 5th February 2010, 11:14 AM

I decided to supravox.

215 SIGNATURE SUPRAVOX

Someone advised me how to do the crossover for the woofer?

How to cut?

Consider that I have already built the crossover shown in figure number 2 in this PDF: http://www.audioreview.it/documenti/...ER_DR_HEIL.pdf

Thanks for any help!

FORNO · 5th February 2010, 11:17 AM

Ohps....

http://www.audioreview.it/documenti/...ER_DR_HEIL.pdf

el`Ol · 5th February 2010, 01:34 PM

The 18 Ohm resistor is used to adapt the sensitivity of the Heil to that of the midbass driver. Usually I use the "cookbook" crossovers with the resistor before the driver, not before the crossover, but I think also in this variation a change of the resistance will change the cutoff frequency if the value of the following capacitor stays the same. The Supravox has an impedance rise towards the top end that will have to be corrected. The simple formula for that often doesn't work. You won't get around using a simulation software, measurement equipment will give further improvement. Not rocket science, however, and I think the result will be worth the effort.

3rd February 2010, 10:25 PM	#1
FORNO diyAudio Member Join Date: Dec 2009	Good woofer 2-way dipole Do you have any advice for a woofer that works well up to 2500..3000 Hz and that can be used for a 2-way dipole ? I want to use it with a HEIL twitter. Thanks for any response...

3rd February 2010, 10:43 PM	#2
InclinedPlane diyAudio Member Join Date: Jan 2007 Location: Maine	I'm considering a similar project. I don't know what to think when I see replacement AMT diaphragms on the same sales page as the AMT unit, though. I hope they are reliable. You're going to have to think woofer(s) as in more than one if you want to match output passively. But if biamping, I'd try the AE dipole 15. It would help if you described your listening habits, design desires and what source electronics you have. __________________ I must confess my favorite music is that made by the Rolls Royce Merlin.

4th February 2010, 01:58 PM	#5
el`Ol diyAudio Member Join Date: May 2005 Location: Bavarian Forest	What shall be the crossover frequency to the sub? Is a dipole sub desired? Wow wide will be the baffle? What kind of amp? Is high SPL required? Last edited by el`Ol; 4th February 2010 at 02:01 PM.

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4th February 2010, 08:51 AM	#4
FORNO diyAudio Member Join Date: Dec 2009	Thanks for the advice. I've already assembled the crossover shown in figure number 2 in this PDF: http://www.audioreview.it/documenti/...ER_DR_HEIL.pdf The sound is very nice! Even a friend advised me the "215 SIGNATURE SUPRAVOX. What do you think?

4th February 2010, 03:17 PM	#6
FORNO diyAudio Member Join Date: Dec 2009	"What shall be the crossover frequency to the sub?" I do not know, the twetter cross cut is 2500Hz acoustic, I need help to build the woofer crossover ! "Is a dipole sub desired?" Yes "Wow wide will be the baffle?" I have no space limitations "What kind of amp?" Densen B-150 Integrated Amplifier "Is high SPL required?" ?

4th February 2010, 05:37 PM	#7
el`Ol diyAudio Member Join Date: May 2005 Location: Bavarian Forest	This is how a wide baffle looks like: PHY-HP (Haut parleurs)® - Baffle Plan

5th February 2010, 11:14 AM	#8
FORNO diyAudio Member Join Date: Dec 2009	I decided to supravox. 215 SIGNATURE SUPRAVOX Someone advised me how to do the crossover for the woofer? How to cut? Consider that I have already built the crossover shown in figure number 2 in this PDF: http://www.audioreview.it/documenti/...ER_DR_HEIL.pdf Thanks for any help!

5th February 2010, 11:17 AM	#9
FORNO diyAudio Member Join Date: Dec 2009	Ohps.... http://www.audioreview.it/documenti/...ER_DR_HEIL.pdf

5th February 2010, 01:34 PM	#10
el`Ol diyAudio Member Join Date: May 2005 Location: Bavarian Forest	The 18 Ohm resistor is used to adapt the sensitivity of the Heil to that of the midbass driver. Usually I use the "cookbook" crossovers with the resistor before the driver, not before the crossover, but I think also in this variation a change of the resistance will change the cutoff frequency if the value of the following capacitor stays the same. The Supravox has an impedance rise towards the top end that will have to be corrected. The simple formula for that often doesn't work. You won't get around using a simulation software, measurement equipment will give further improvement. Not rocket science, however, and I think the result will be worth the effort.

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