Need help with BIB design

[jbloud47]

OK well im new here and really dont know that much about home audio, but i wanted to try to build BIB enclusure for two full range speakers that i have laying around the house. Question is how do i know how tall to make the enclosure and how big to make the throat of the enclosure? any imput is welcomed

[gmilitano]

That depends on what drivers you will be using.

[jbloud47]

I just have two 4 inch full range speakers dont know any specs on them im just playing around with the idea to see what i can get them to sound like. I seemed like a fun project to mess with

[gychang]

Originally posted by jbloud47
I just have two 4 inch full range speakers dont know any specs on them im just playing around with the idea to see what i can get them to sound like. I seemed like a fun project to mess with

look around here

http://www.zillaspeak.com/bib.asp

gychang

[GM]

Greets!

Unfortunately, we're not wizards, so with no driver info beyond them being 4", about all I can say is build T.C.'s BIB and experiment with stuffing up in the pointed end, around the driver, and down on its 'floor' until you get the best sound and it is what it is.

GM

[jbloud47]

thanks for the info like i said i didnt know the formulas to how these type boxes are designed that thats why i ask

But i have narrowed my sellection down I think im going to pic up a pair of 4.5" pioneers or a pair of Tangband 4" 1052SA. Im looking for them to be as loud as possible since they will be for sound in my garage and i would like them do get as low.

pioneer spacs.
Power handling: 20 watts RMS/30 watts max * Voice coil diameter: 1" * Impedance: 8 ohms * Frequency response: 70-15,000 Hz * Magnet weight: 9.3 oz. * Fs: 70 Hz * SPL: 90 dB 1W/1m * Vas: .31 cu. ft. * Xmax: 1.1mm * Qms: 1.40 * Qes: .47 * Qts: .35 * Net weight: 2 lbs. * Manufacturer model number: A11EC80-02F * Dimensions: Overall Diameter: 4-1/2", Cutout Diameter: 4-1/8", Mounting Depth: 2-3/8", Magnet Diameter: 3-1/8", Magnet Height: 1".

TangBand:
Specifications: Power Handling: 45 watts RMS/90 watts max *VCdia: 1" *Znom: 4 ohms *Re: 3.80 ohms *Frequency range: 60-15,000 Hz *Fs: 63 Hz *SPL: 90 dB 2.83V/1m *Vas: .26 cu. ft. *Qms: 4.52 *Qes: .49 *Qts: .44 *Xmax: 4 mm *Dimensions: Overall Diameter: 4-9/16", Cutout Diameter: 3-3/4", Mounting Depth: 2-1/4".

[brucedal1]

http://www.zillaspeak.com/BIB-Tangband.asp

I built one with the 1052SA and I liked it a lot. The tweeter helped though

[jbloud47]

thats the design i was thinkign of going with and adding a piezo tweet but i just dont know about the placement and what kind of cap or resistor to use and how to wire it in.

[Godzilla]

http://www.zillaspeak.com/Bamboo.asp

You can try it on the back like the above.

- Piezo on back connected to .33 uf capacitor + 20 ohm resistor across. -

Godzilla

[GM]

Originally posted by jbloud47
thanks for the info like i said i didnt know the formulas to how these type boxes are designed that thats why i ask

Greets!

You're welcome, but I sure didn't get this from your earlier posts. Anyway, here's what I came up with to allow anyone to 'roll their own': http://www.diyaudio.com/forums/showt...24#post1229324

GM