What cutof frequency ?

Fradbut · 29th January 2007, 02:20 PM

Hi Folks, I've got a 2 way ported design going on. A Vifa PL18WO09-08 & Vifa XT25TG30-04. What do you reckon is a good starting point in estimating the bass & treble cutoff frequency ?

richie00boy · 29th January 2007, 03:45 PM

Bass - when directivity narrows. Work out what wavelength is the same as the cone piston diameter.

Treble - keep at least an octave above tweeter resonance frequency.

Fradbut · 29th January 2007, 05:01 PM

Ouch Richie you lost me for a minute............... whats that in English ? can you give a rough guesstimate ? 2 to 2.5 kHz ?

richie00boy · 29th January 2007, 07:07 PM

It's simply not possible to estimate anything given the scant information given. I suggest you read up a bit more about drivers before trying to design blind.

29th January 2007, 02:20 PM	#1
Fradbut diyAudio Member Join Date: Jan 2007 Location: UK	What cutof frequency ? Hi Folks, I've got a 2 way ported design going on. A Vifa PL18WO09-08 & Vifa XT25TG30-04. What do you reckon is a good starting point in estimating the bass & treble cutoff frequency ?

29th January 2007, 03:45 PM	#2
richie00boy Did it Himself diyAudio Member Join Date: Nov 2003 Location: Gloucestershire, England, UK	Bass - when directivity narrows. Work out what wavelength is the same as the cone piston diameter. Treble - keep at least an octave above tweeter resonance frequency. __________________ www.readresearch.co.uk my website for UK diy audio people - designs, PCBs, kits and more

29th January 2007, 05:01 PM	#3
Fradbut diyAudio Member Join Date: Jan 2007 Location: UK	lost me Ouch Richie you lost me for a minute............... whats that in English ? can you give a rough guesstimate ? 2 to 2.5 kHz ?

29th January 2007, 07:07 PM	#4
richie00boy Did it Himself diyAudio Member Join Date: Nov 2003 Location: Gloucestershire, England, UK	It's simply not possible to estimate anything given the scant information given. I suggest you read up a bit more about drivers before trying to design blind. __________________ www.readresearch.co.uk my website for UK diy audio people - designs, PCBs, kits and more

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