Bass loading for Alcone AC8HE

DarkOne · 17th January 2008, 02:14 PM

Hi All,
I have a pair of Alcone AC8HE woofers and I'd like to use them in my next project. Only question is about bass loading because they appear to be good performers wherever I put them to. They will play in relative small room at moderate levels.
SQ is most important.
Should I use them in closed or vented enclosure (or any other)?

Datasheet is attached.

Every suggestion is welcome.

sreten · 17th January 2008, 03:11 PM

Hi,

Given that you cannot use them easily in a 2 way I'd go 3 way.
Around 60L to 70L tuned to 30Hz goes low.

/sreten.

DarkOne · 17th January 2008, 03:16 PM

Sreten,
thanks for your quick reply.
Anyway, this woofer will be used in 2-way loudspeaker. My major concern is a little high Qts, so I don't know if it's better to put it in closed box or it's still good for vented.

Leeuwarden · 17th January 2008, 03:35 PM

It will do allright in a two way. I use it with a Dynaudio D260 Esotec.

http://www.lautsprechershop.de/hifi/...fourier_en.htm

DarkOne · 17th January 2008, 03:44 PM

Quote:

Originally posted by Leeuwarden
It will do allright in a two way. I use it with a Dynaudio D260 Esotec.

http://www.lautsprechershop.de/hifi/...fourier_en.htm

Hi Leeuwarden,
If it's possible, could you please show me crossover schematic.

Thanks

Leeuwarden · 17th January 2008, 05:12 PM

As far as I remember it is the same as the woofer section in this link; http://www.audioaktiv.at/fourier.htm
Tweeter part is different ofcourse.

sreten · 17th January 2008, 07:42 PM

Hi,

You can use it easily in a 2-way by sticking your head in the sand.

http://www.zaphaudio.com/audio-speaker17.html

See the discussion on distortion issues of metal cones here.

Seas L18 : note the twin peaks in all distortions due to driver response

The discussion concentrates on F3, it can be seen to be OK below 2KHz.
If you start worrying about F5 do not use metal cones in a 2-way.
Now drop the cone break up an octave as in this case.
Note that the c/o has no effect on the distortion produced by fundamentals.

The drivers also work fine in 30 to 40L sealed.

/sreten.

Leeuwarden · 17th January 2008, 07:49 PM

Quote:

Originally posted by sreten
Hi,

You can use it easily in a 2-way by sticking your head in the sand.

/sreten.

Huh?

DarkOne · 17th January 2008, 07:53 PM

Sreten,
I know about it (anyway, each driver is different), but I bought these drivers few years ago, if I buy drivers now, I'd buy paper or PP coned woofers (CA22RNY looks great for me). I just want to use them in some project and I'm not experienced enough to try to go 3-way. I'll try to get XO as low as possible as I use waveguide tweeter, maybe it will help.

Thanks

No sand here around, may I stick my head to concrete wall?

sreten · 17th January 2008, 08:21 PM

Quote:

Originally posted by DarkOne

No sand here around, may I stick my head to concrete wall?

Hi,

Presumably there are no Ostrich's around either.

http://www.rjbaudio.com/Audiofiles/FRDtools.html
http://www.geocities.com/woove99/Spkrbldg/

Your 2 way is more difficult than a 3-way,
square pegs into round holes and all that .....

/sreten.

17th January 2008, 03:16 PM	#3
DarkOne diyAudio Member Join Date: Oct 2001 Location: Bratislava	Sreten, thanks for your quick reply. Anyway, this woofer will be used in 2-way loudspeaker. My major concern is a little high Qts, so I don't know if it's better to put it in closed box or it's still good for vented. __________________ Regards Robo

17th January 2008, 07:53 PM	#9
DarkOne diyAudio Member Join Date: Oct 2001 Location: Bratislava	Sreten, I know about it (anyway, each driver is different), but I bought these drivers few years ago, if I buy drivers now, I'd buy paper or PP coned woofers (CA22RNY looks great for me). I just want to use them in some project and I'm not experienced enough to try to go 3-way. I'll try to get XO as low as possible as I use waveguide tweeter, maybe it will help. Thanks No sand here around, may I stick my head to concrete wall? __________________ Regards Robo

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17th January 2008, 03:11 PM	#2
sreten diyAudio Member Join Date: Nov 2003 Location: Brighton UK	Hi, Given that you cannot use them easily in a 2 way I'd go 3 way. Around 60L to 70L tuned to 30Hz goes low. /sreten.

17th January 2008, 03:35 PM	#4
Leeuwarden diyAudio Member Join Date: Nov 2002 Location: The Netherlands	It will do allright in a two way. I use it with a Dynaudio D260 Esotec. http://www.lautsprechershop.de/hifi/...fourier_en.htm

17th January 2008, 05:12 PM	#6
Leeuwarden diyAudio Member Join Date: Nov 2002 Location: The Netherlands	As far as I remember it is the same as the woofer section in this link; http://www.audioaktiv.at/fourier.htm Tweeter part is different ofcourse.

17th January 2008, 07:42 PM	#7
sreten diyAudio Member Join Date: Nov 2003 Location: Brighton UK	Hi, You can use it easily in a 2-way by sticking your head in the sand. http://www.zaphaudio.com/audio-speaker17.html See the discussion on distortion issues of metal cones here. Seas L18 : note the twin peaks in all distortions due to driver response The discussion concentrates on F3, it can be seen to be OK below 2KHz. If you start worrying about F5 do not use metal cones in a 2-way. Now drop the cone break up an octave as in this case. Note that the c/o has no effect on the distortion produced by fundamentals. The drivers also work fine in 30 to 40L sealed. /sreten.

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