Sensitivity match in a 3-way system? all of equal sensitivity? or bass is 6db more?

rhythmdiy · 4th November 2007, 03:35 PM

Dear friends,
I ve been fiddling over the net for knowing the right sensitivity of the drivers as its said that sensitivity of the woofer driver in a 3 way system will be 6 db more than that of the mids and highs....where mids and highs will be having the same sensitivity. Its said that the room absorbs that 6db. How far this is true?

please guide me.

thanks,
Ken

myhrrhleine · 4th November 2007, 05:30 PM

No, the room may add sound level.
Depending on speaker placement.
Go for equal SPL ratings.

sreten · 5th November 2007, 10:17 AM

Hi,

In a 3 way the nominal sensitity of the bass units should be ~ 4dB
higher than the midrange unit, giving some flexibilty to pad the
mid a dB or so back. The tweeter should be few dB above the mid
so this can also be attenuated back to match the midrange.

Buying them all the same sensitivity is wrong .......
If you do you will need to attenuate both mid and treble ~ 4 to 5 dB.

/sreten.

DeonC · 5th November 2007, 10:24 AM

Hi Ken

It will be good for the bass to be 6dB more efficient if your XO point is at or higher than the baffle step frequency (just do a search to find out more). Other guys can comment more (and more competantly) on this.

Deon

sreten · 5th November 2007, 11:25 AM

Hi,

6dB is generally too much as you may not be able to lift the mid and
treble above your nominal bass level, attenuating bass is not good.

/sreten.

tinitus · 5th November 2007, 11:33 AM

If you use 18" woofers you probably wont need any BSC

4th November 2007, 03:35 PM	#1
rhythmdiy diyAudio Member Join Date: Dec 2006	Sensitivity match in a 3-way system? all of equal sensitivity? or bass is 6db more? Dear friends, I ve been fiddling over the net for knowing the right sensitivity of the drivers as its said that sensitivity of the woofer driver in a 3 way system will be 6 db more than that of the mids and highs....where mids and highs will be having the same sensitivity. Its said that the room absorbs that 6db. How far this is true? please guide me. thanks, Ken

4th November 2007, 05:30 PM	#2
myhrrhleine diyAudio Member Join Date: Jan 2006 Location: Avalon Island	Re: Sensitivity match in a 3-way system? all of equal sensitivity? or bass is 6db mor No, the room may add sound level. Depending on speaker placement. Go for equal SPL ratings. __________________ Just because you can't hear it doesn't mean no one can.

5th November 2007, 10:24 AM	#4
DeonC diyAudio Member Join Date: May 2002 Location: Kimberley, South-Africa	Hi Ken It will be good for the bass to be 6dB more efficient if your XO point is at or higher than the baffle step frequency (just do a search to find out more). Other guys can comment more (and more competantly) on this. Deon __________________ Have a look at my favorite thread: Interesting YouTube video clips

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5th November 2007, 10:17 AM	#3
sreten diyAudio Member Join Date: Nov 2003 Location: Brighton UK	Hi, In a 3 way the nominal sensitity of the bass units should be ~ 4dB higher than the midrange unit, giving some flexibilty to pad the mid a dB or so back. The tweeter should be few dB above the mid so this can also be attenuated back to match the midrange. Buying them all the same sensitivity is wrong ....... If you do you will need to attenuate both mid and treble ~ 4 to 5 dB. /sreten.

5th November 2007, 11:25 AM	#5
sreten diyAudio Member Join Date: Nov 2003 Location: Brighton UK	Hi, 6dB is generally too much as you may not be able to lift the mid and treble above your nominal bass level, attenuating bass is not good. /sreten.

5th November 2007, 11:33 AM	#6
tinitus diyAudio Moderator Join Date: Nov 2005	If you use 18" woofers you probably wont need any BSC

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