Consensus Project

Stee · 23rd August 2008, 11:07 AM

My new project is based on the principle of double bass
small signal
great resonance

I took a loudspeaker and refinement with 10 litres of equal volume
in configuration isobarica become 5
put on a volume of 40 litres with reflex tube
means having a volume 10 times greater than necessary

http://www.audiokit.it/ITAENG/Altopa...T25TG30-04.pdf
http://www.audiokit.it/ITAENG/Altopa...13WH-00-08.pdf

PeteMcK · 24th August 2008, 10:40 AM

that sims very badly in Winisd, what freq do you intend to tune the box?

Stee · 24th August 2008, 06:56 PM

with only tweeter filter

PeteMcK · 24th August 2008, 09:47 PM

using 40L, there will be a huge peak at 40Hz, the best you can hope for is a -6dB alignment using 7.5L.
I'd forget about isobaric, and use these drivers with a good woofer, they aren't that good for LF

Andy G · 24th August 2008, 09:56 PM

there is also no way the XT will sound any good with the simple series x-o you show in the first post.

PeteMcK · 24th August 2008, 10:54 PM

Looking around the web, the only projects I could find using a pair of P13WHs were Lynn's Ariel & ME2: http://www.audiocraftworks.gr/gr/pag...riel/ariel.htm

The P13s are very good drivers, just not good at bass...

Andy G · 25th August 2008, 06:04 AM

I agree with Pete. The P13WH is a VERY good mid driver, but it looses all that mid niceness if you ask it to do too much bass.

Far better to use it in a 3-way design where it will just do mid duties.

The XT tweeter is also a VERY nice tweeter, but you have to stay away from its res freq or put a whooping LCR circuit on it. The proposed series x-o does neither.

Stee · 25th August 2008, 01:28 PM

also this idea about double bass effect is rubbish

lineup · 25th August 2008, 01:39 PM

Quote:

Originally posted by PeteMcK
[B]
The P13s are very good drivers, just not good at bass... /B]

Quote:

Originally posted by Andy Graddon
I agree with Pete. The P13WH is a VERY good mid driver, but it looses all that mid niceness if you ask it to do too much bass.

Quote:

Originally posted by Stee
... this idea about double bass effect is rubbish

I have to agree, if we mean to get lower NORMAL bass.
One 5 inch ( 130 mm ) will never make more than small monitor bass sound.
VIFA small woofers, mid woofers, are good in quality
and especially very good in Performance/Price comparison.

Double, TWO 130 mm woofers will not change towards the lower bass.
It can however reduce the midrange distortion.
As each woofer makes 50% of the sound only.

24th August 2008, 10:40 AM	#2
PeteMcK diyAudio Member Join Date: Feb 2002 Location: Sydney	that sims very badly in Winisd, what freq do you intend to tune the box? __________________ ‘today… there lives alongside the twentieth century the tenth or thirteenth. A hundred million people use electricity and still believe in the magic power of signs and exorcisms” Trotsky

24th August 2008, 09:47 PM	#4
PeteMcK diyAudio Member Join Date: Feb 2002 Location: Sydney	using 40L, there will be a huge peak at 40Hz, the best you can hope for is a -6dB alignment using 7.5L. I'd forget about isobaric, and use these drivers with a good woofer, they aren't that good for LF __________________ ‘today… there lives alongside the twentieth century the tenth or thirteenth. A hundred million people use electricity and still believe in the magic power of signs and exorcisms” Trotsky

24th August 2008, 10:54 PM	#6
PeteMcK diyAudio Member Join Date: Feb 2002 Location: Sydney	Looking around the web, the only projects I could find using a pair of P13WHs were Lynn's Ariel & ME2: http://www.audiocraftworks.gr/gr/pag...riel/ariel.htm The P13s are very good drivers, just not good at bass... __________________ ‘today… there lives alongside the twentieth century the tenth or thirteenth. A hundred million people use electricity and still believe in the magic power of signs and exorcisms” Trotsky

25th August 2008, 01:28 PM	#8
Stee diyAudio Member Join Date: Jul 2005 Location: milan	yes are not good for bass also this idea about double bass effect is rubbish __________________ visit my best audio idea http://www.esafono.it/DACTONE.htm

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24th August 2008, 09:56 PM	#5
Andy G diyAudio Member Join Date: Apr 2002 Location: Newcastle, Australia	there is also no way the XT will sound any good with the simple series x-o you show in the first post.

25th August 2008, 06:04 AM	#7
Andy G diyAudio Member Join Date: Apr 2002 Location: Newcastle, Australia	I agree with Pete. The P13WH is a VERY good mid driver, but it looses all that mid niceness if you ask it to do too much bass. Far better to use it in a 3-way design where it will just do mid duties. The XT tweeter is also a VERY nice tweeter, but you have to stay away from its res freq or put a whooping LCR circuit on it. The proposed series x-o does neither.

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