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Old 08-01-2008, 02:43 PM   #1
Join Date: Apr 2007
Posts: 3

Default Help with designing a crossover

Hey guys,

I was looking to build some basic "garage speakers" and wanted to follow the Parts Express Project - Woodies. You'll notice the guy that submitted the design bought a generic crossover, but I want to aim to do a bit more than that, even though I've never attempted to build/design a crossover before.

I'm not looking for something crazy good, but it'd be nice to get something in the ballpark... The other tough part is the info available on goldwood speakers... Here's all I could find (from Parts-Express, since Goldwood website isn't helpful at all):

Goldwood GT-302/S 1/2" Mylar Dome Tweeter Shielded
Power handling: 30 watts RMS/45 watts max
Voice coil diameter: 1/2"
Impedance: 8 ohms
Frequency response: 4,000 - 19,000 Hz
Magnet weight: 1/2 oz.
Fs: 2,600 Hz
SPL: 90 dB 1W/1m
Net weight: 2 oz.
Manufacturer part number: GT-302/GT-302S
Dimensions: Overall Diameter: 2-3/8" x 2-3/8", Cutout Diameter: 1-15/16", Mounting Depth: 7/8", Magnet Diameter: 1-7/16", Magnet Height: 5/8"

Goldwood GM-85/8 5" Heavy Duty Sealed Back Midrange 8 Ohm
Power handling: 40 watts RMS/55 watts max
Voice coil diameter: 1"
Impedance: 8 ohms
Frequency response: 800-8,000 Hz
Fs: 470 Hz
SPL: 89 dB 1W/1m
Dimensions: Overall Diameter: 5-1/8", Cutout Diameter: 4-1/8", Mounting Depth: 2-1/2", Magnet Diameter: 3-1/8", Magnet Height: 3/4".

Goldwood GW-10PC-40-8 10" Heavy Duty Woofer 8 Ohm
Power handling: 140 watts RMS/270 watts max
Voice coil diameter: 1-1/2"
Le: 1.85 mH
Frequency response: 36-5,000 Hz
Re: 7.22 ohms
Magnet weight: 40 oz.
Fs: 45 Hz
SPL: 90.4 dB 2.83W/1m
Vas: 1.12 cu. ft.
Qms: 4.50
Qes: .52
Qts: .47
Xmax: 3.55mm
Net weight: 7-1/3 lbs.
Dimensions: Overall Diameter: 10-1/4", Cutout Diameter: 9-1/8", Mounting Depth: 4-3/8", Magnet Diameter: 4", Magnet Height: 1-1/4"

Is this enough information to design a crossover? I've got a couple books I've started reading through and some material online as well to refresh my memory on all this. I don't have any test hardware, but I figured y'all would point me in the right direction... I hoped this might be a decent first post around here...

For fun, you may be entertained to know that I'll be powering these with an old school Marantz 2230 (Watch out for its 30x2 watts of fury!)
Thanks for any input...
AUr6 is offline   Reply With Quote

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