2.5way to reduce F3 for 3" woofer

goldyrathore · 1st December 2003, 02:09 PM

Bravox 3" woofer available at partsexpress has Fs of 150 Hz. There is an example of a 2way with Tang Band tweeter. Can I throw in another Bravox 3" woofer and get down the F3 to say 80Hz. How will it sound? The XMAX is just 1 mm. Can anyone predict the success of this combination? I am willing to go active

sreten · 1st December 2003, 03:11 PM

IMO the Bravox unit doesn't qualify as a bass unit and
will be next to impossible to get down to 80Hz by adding
an identical unit.

You could add a better bass unit in parallel, but if you add
the cost of the two units perhaps starting off with a better
unit for 80Hz would be a better idea ?

/sreten.

Solid Snake · 2nd December 2003, 11:33 AM

Add weight to the cone.

sreten · 2nd December 2003, 12:46 PM

HI SS,

Adding weight to the mid driver is a no-no.

Adding weight to the 'additional' driver won't work for several
reasons, tiny Vas, Q is too high, excursion is too low.
To get Fs down an octave, 150 to 75hz you need to quadruple
the wieght of the cone and efficiency will go completely down the
pan, so it would be pointless to add.

These are simply not bass drivers of any sort, look at the Vas for
a start, (then Fs, Q and excursion)

/sreten.

1st December 2003, 02:09 PM	#1
goldyrathore diyAudio Member Join Date: Nov 2002 Location: Bangalore, India	2.5way to reduce F3 for 3" woofer Bravox 3" woofer available at partsexpress has Fs of 150 Hz. There is an example of a 2way with Tang Band tweeter. Can I throw in another Bravox 3" woofer and get down the F3 to say 80Hz. How will it sound? The XMAX is just 1 mm. Can anyone predict the success of this combination? I am willing to go active __________________ Audio enthusiast/hobbyist

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Reduce "pop" noise when power on/off	veckans	Class D	11	28th January 2009 09:53 AM
"reduce rail voltage 20% > pick up on sonics"	rick57	Solid State	7	13th April 2006 12:45 AM
suspending a small tweeter in front of woofer for "coaxial" effect?	bikehorn	Multi-Way	3	2nd January 2006 02:04 PM
WTB: Focal & Audiom & Volts 11", 12", 13", 15" woofer	gengis	Swap Meet	0	17th March 2005 02:29 AM
cheap 6" or 8" woofer to make great bass for a standard cab pick up	zuki	Subwoofers	12	15th February 2005 07:54 AM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

1st December 2003, 03:11 PM	#2
sreten diyAudio Member Join Date: Nov 2003 Location: Brighton UK	IMO the Bravox unit doesn't qualify as a bass unit and will be next to impossible to get down to 80Hz by adding an identical unit. You could add a better bass unit in parallel, but if you add the cost of the two units perhaps starting off with a better unit for 80Hz would be a better idea ? /sreten.

2nd December 2003, 11:33 AM	#3
Solid Snake diyAudio Member Join Date: Feb 2003	Add weight to the cone.

2nd December 2003, 12:46 PM	#4
sreten diyAudio Member Join Date: Nov 2003 Location: Brighton UK	HI SS, Adding weight to the mid driver is a no-no. Adding weight to the 'additional' driver won't work for several reasons, tiny Vas, Q is too high, excursion is too low. To get Fs down an octave, 150 to 75hz you need to quadruple the wieght of the cone and efficiency will go completely down the pan, so it would be pointless to add. These are simply not bass drivers of any sort, look at the Vas for a start, (then Fs, Q and excursion) /sreten.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)