Consensus Project

[Stee]

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/Altoparlanti/VIFA/XT25TG30-04.pdf
http://www.audiokit.it/ITAENG/Altoparlanti/VIFA/P13WH-00-08.pdf

 

[PeteMcK]

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

 

[Stee]

around 40 Hz reflex

with only tweeter filter

 

[PeteMcK]

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]

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

 

[PeteMcK]

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/pages/projects/speakers/ariel/ariel.htm

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

 

[Andy G]

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]

yes are not good for bass

also this idea about double bass effect is rubbish

 

[lineup]

Re: yes are not good for bass

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

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.

... 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.