TMMW Design Help

[nextbestthing]

Ok...I am really interested in building something here and am kinda stuck with a TMMW design using PE Drivers. Can any of you experts go over my idea and verify/deny/help my plan. I am planning on building a single enclosure bottom half sealed at 84 cu.ft. for the Dayton DC200 and the upper half ported at .5 cu.ft. for the (2) Tang Bands 3" and Dayton1-1/8".

Questions:
1. What size port for Tang Bands and Vifa?
2. Crossover design I pictured the 3way crossover frequency would be 4200-525?
3. Am I just high on life thinking I have a clue or am I actually doing something right? LOL

JUST SO EVERYONE IS CLEAR I DO MY BEST LEARNING BY DIVING INTO SOMETHING WAY ABOVE MY HEAD, SO FROM NOW ON YOU WILL SEE ME IN HERE ASKING THE WEIRDEST QUESTIONS JUST TO SEE WHY...!

THANKS IN ADVANCE...!


TWEETER = Dayton Audio DC28F-8 1-1/8" Silk Dome Tweeter
Specifications: • Power handling: 50 watts RMS/75 watts max • VCdia: 1-1/8" • Impedance: 8 ohms • Re: 5.5 ohms • Frequency range: 1,300-20,000 Hz • Fs: 637 Hz • SPL: 89 dB 1W/1m • Dimensions: Overall diameter: 4-5/16", Cutout diameter: 3-1/8", Depth: 1-5/8" •

MIDS = Tang Band W3-881SI 3"
Specifications: Power handling: 15 watts RMS/30 watts max *VCdia: 3/4" *Impedance: 8 ohms *Re: 6.6 ohms *Frequency range: 100-20,000 Hz *Fs: 106 Hz *SPL: 84.5 dB 1W/1m *Vas: 0.05 cu. ft. *Qms: 7.17 *Qes: 0.96 *Qts: 0.85 *Xmax: 0.5 mm *Dimensions: Overall diameter: 3-3/16", Cutout diameter: 3", Depth: 2".

WOOFER = Dayton Audio DC200 8"
Specifications: • Power handling: 60 watts RMS/85 watts max • Voice coil diameter: 1-3/8" • Le: 2.36 mH • Impedance: 8 ohms • Re: 6.4 ohms • Frequency response: 29-3,000 Hz • Magnet weight: 15 oz. • Fs: 31 Hz • SPL: 88 dB 1W/1m • Vas: 1.78 cu. ft. • Qms: 2.96 • Qes: 0.47 • Qts: 0.40 • Xmax: 4.5 mm • Dimensions: Overall Diameter: 8-1/16", Cutout Diameter: 7-5/16", Mounting Depth: 3-3/4", Magnet Diameter: 4", Magnet Height: 1-1/4".

[mattp]

Don't port the mids, theres no point. Throwing a port in the woofer cabinet will help the low end a bit, 2"x8" will get you tuned around 32 Hz.


What Vifa are you talking about?

[nextbestthing]

Don't port the mids, theres no point. Throwing a port in the woofer cabinet will help the low end a bit, 2"x8" will get you tuned around 32 Hz.


What Vifa are you talking about?

Sorry, mistake I actually wanted the dayton tweeter listed with specifications...so no port up top? Overall what are your thoughts of the design?

[kmibb]

1. If you're going to have a mid that can cross above 3kHz, I would choose something other (better) than the silkie, you can do better for the money. Look at the Vifa BC25.

2. If you use two of those mids, you'll have 4 ohm in the mids and 8 ohm for the woofer. This might cause problems with amps that aren't good with low impedance (ie receivers.) I'd look for a more sensitive 4-ohm mid pair to put in series or a 4-ohm woofer.

Here's my recommendation:

(1) Vifa BC25SG15-04 1" Shielded Dome Tweeter
(2) Peerless 832444 4-1/2" Shielded Midbass Driver 4 Ohm in series
(1) Dayton Audio DA215-8 8" Aluminum Cone Woofer

Tweeter is same size, better HD, and cheaper. Mids are more sensitive, cheaper, and can be wired in series for an 8-ohm nominal load. Woofer has more Xmax, is slightly more sensitive, and has a lower vas. This would imply that it can go lower in a smaller box. It's also a better made woofer and for only $0.25 more.

[nextbestthing]

Dayton Audio DC130BS-4 5-1/4" Classic Shielded Woofer 4 Ohm
Specifications: • Power handling: 30 watts RMS/45 watts max • VCdia: 1" • Le: 0.61 mH • Impedance: 4 ohms • Re: 3.5 ohms • Frequency range: 55-4,000 Hz • Fs: 59 Hz • SPL: 91.8 dB 2.83V/1m, 88.8 dB 1W/1m • Vas: 0.40 cu. ft. • Qms: 2.18 • Qes: 0.52 • Qts: 0.42 • Xmax: 2.5 mm • Dimensions: A: 5-11/16", B: 4-3/4", C: 3-1/8".

What do you think of this 4ohm woofer and yes I'll turn to the vifa...i like their tweeters beyer anyway...

[dcgold2000]

I'm having a hard time with the "84 cu. ft." woofer enclosure. Surely a typo in there?

[nextbestthing]

Lol....build a shed for an 8"speaker.... (.84) thanks