eminence sigma pro 18 in the house ?

jeeracing · 22nd December 2010, 08:04 PM

hi guys, I just want to know what you thing about sigma 18" driver for home environnement? with about 200watt/8ohm amplifier

it will be for 95% musique and live music show on dvd. 5% movie.

I'm limited to 180-200 liters box (probably use the recommeded BR 7cu/ft box from eminence f3:40htz)

I'm a newbie with PA woofers. i know it will be not go realy down but it's for ALL type of music.

I look for large diameter driver but cheap price if you have another suggestion

thank you.

Boscoe · 22nd December 2010, 08:28 PM

I think you would be better off doing a horn design like I am, I don't have the money or room for 18" drivers so I'm doing THIS design. There are also designs for 15" drivers with are supposed to be able to beat 18" of similar power levels I think.

There are also a lot more horn designs of course!

jeeracing · 09:01 PM

yes, I look abaout the cubo 15 and 18 , this is very interesting.

I'm not familiar with this type of box, what is the biger differance compare to a BR for example?

Boscoe · 22nd December 2010, 10:17 PM

I don't know that much but there are others in this section of forum who will be very able to tell you in detail but I can tell you they are a type of rear loaded horn they are pften called hybrids.

I can't teall you about horn theory I have no clue but they are supposed to yield very good sensitivity.

bjorno · 23rd December 2010, 12:50 AM

FYI:

Hi-Fi...Lo-FI comparison:

b

nigelwright7557 · 01:05 AM

I use one for home and disco use.
I love the bass response from this speaker.
If I remember correct it also works upto 2.5KHz.
I complement it with a midrange 4 by 10inch cabinet for mid to high frequencies.

I just used a basic box with a 4 inch vent in the rear.

djk · 23rd December 2010, 09:13 AM

About 6 cu ft (net) with the port tuned to 28hz and a high-pass filter with a Q=2 at 28hz will give you a -3dB point of 28hz with the SIGMA PRO 18A-2.

Most common plate amplifiers have a hi-pass filter than can be changed as per the above requirements.

jeeracing · 23rd December 2010, 02:24 PM

Quote:

Originally Posted by djk

About 6 cu ft (net) with the port tuned to 28hz and a high-pass filter with a Q=2 at 28hz will give you a -3dB point of 28hz with the SIGMA PRO 18A-2.

Most common plate amplifiers have a hi-pass filter than can be changed as per the above requirements.

I don't know how you get 28htz in F3, I make a simulation with BBpro and it give me 62htz with your specs.. how you get that ?

jeeracing · 23rd December 2010, 03:24 PM

I have also an active controler for subwoofer, (with:high-cut, low-cut, bass boost etc)

djk · 23rd December 2010, 11:05 PM

"I don't know how you get 28htz in F3, I make a simulation with BBpro and it give me 62htz with your specs.. how you get that ? "

"and a high-pass filter with a Q=2 at 28hz "

22nd December 2010, 08:04 PM	#1
jeeracing diyAudio Member Join Date: Mar 2008	eminence sigma pro 18 in the house ? hi guys, I just want to know what you thing about sigma 18" driver for home environnement? with about 200watt/8ohm amplifier it will be for 95% musique and live music show on dvd. 5% movie. I'm limited to 180-200 liters box (probably use the recommeded BR 7cu/ft box from eminence f3:40htz) I'm a newbie with PA woofers. i know it will be not go realy down but it's for ALL type of music. I look for large diameter driver but cheap price if you have another suggestion thank you. __________________ jee.

22nd December 2010, 08:58 PM	#3
jeeracing diyAudio Member Join Date: Mar 2008	yes, I look abaout the cubo 15 and 18 , this is very interesting. I'm not familiar with this type of box, what is the biger differance compare to a BR for example? __________________ jee. Last edited by jeeracing; 22nd December 2010 at 09:01 PM.

22nd December 2010, 10:17 PM	#4
Boscoe diyAudio Member Join Date: Feb 2010 Location: England	I don't know that much but there are others in this section of forum who will be very able to tell you in detail but I can tell you they are a type of rear loaded horn they are pften called hybrids. I can't teall you about horn theory I have no clue but they are supposed to yield very good sensitivity. __________________ I thought about it once, but then thought again.

23rd December 2010, 12:54 AM	#6
nigelwright7557 diyAudio Member Join Date: Apr 2008 Location: Carlisle, England	I use one for home and disco use. I love the bass response from this speaker. If I remember correct it also works upto 2.5KHz. I complement it with a midrange 4 by 10inch cabinet for mid to high frequencies. I just used a basic box with a 4 inch vent in the rear. __________________ http://www.murtonpikesystems.co.uk PCBCAD40 pcb design software. Last edited by nigelwright7557; 23rd December 2010 at 01:05 AM.

23rd December 2010, 09:13 AM	#7
djk diyAudio Member Join Date: Feb 2001 Location: USA	About 6 cu ft (net) with the port tuned to 28hz and a high-pass filter with a Q=2 at 28hz will give you a -3dB point of 28hz with the SIGMA PRO 18A-2. Most common plate amplifiers have a hi-pass filter than can be changed as per the above requirements. __________________ Candidates for the Darwin Award should not read this author.


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22nd December 2010, 08:28 PM	#2
Boscoe diyAudio Member Join Date: Feb 2010 Location: England	I think you would be better off doing a horn design like I am, I don't have the money or room for 18" drivers so I'm doing THIS design. There are also designs for 15" drivers with are supposed to be able to beat 18" of similar power levels I think. There are also a lot more horn designs of course!

23rd December 2010, 03:24 PM	#9
jeeracing diyAudio Member Join Date: Mar 2008	I have also an active controler for subwoofer, (with:high-cut, low-cut, bass boost etc) __________________ jee.

23rd December 2010, 11:05 PM	#10
djk diyAudio Member Join Date: Feb 2001 Location: USA	"I don't know how you get 28htz in F3, I make a simulation with BBpro and it give me 62htz with your specs.. how you get that ? " "and a high-pass filter with a Q=2 at 28hz " __________________ Candidates for the Darwin Award should not read this author.

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