diy tl speakers with b&w cwm650

[r!sc!]

Hi, I found two B&W drivers CWM650 and I want to combine them with Vifa D27TG-05-06. This is totaly new for me, I never made loudspeakers. Can U help with box design and suggest the crossover too .

Here it is TS parameters for both drivers:

Vifa D27TG-05-06: http://www.d-s-t.com/vifa/data/d27tg-05-06a.htm

Nominal impedance [ohm] 6
Voice coil resistance [ohm] 4.6
Nominal power [W] 100
Short term max power [W] 400
Long term max power [W] 200
Operating power [W] 3.2
Sensitivity [dB] 92
Frequency range [kHz] 2.5-30
Free air resonance [Hz] 1000
Voice coil diameter [mm] 26
Voice coil height [mm] 1.6
Air gap height [mm] 2
Voice coil inductance [mH] -
Eff. diaphragm Area [cm?] 7.1
Moving mass [g] 0.3
Magnet weight [g]/[oz] 240/8.5
Force factor [Bl] 2.7
VAS [l] 0.006
Qms 2.15
Qes 1.19
Qts 0.77

B&W CWM650:

- Mechanical Parameters -

Fs = 74Hz
Qms = 4,653
Vas = 7,558 liters
Cms = 0,332 mm/N
Mms = 13,95 g
Rms = 1,394 kg/s
P-Dia = 127 mm
Sd = 126,7 sq.cm

- Electrical Parameters -

Qes = 0,824
Re = 3,91 Ohm
Le = 0,328 mH
Z = 4 Ohm
BL = 5.547 Tm
Pe = 60 watts

- Electromech. Parameters -

Qts = 0,7
no = 0,358 %
1-W SPL = 87.69 dB
2.83-V SPL = 90.8 dB


Thanks.

[r!sc!]

...another view on B&W...

[drVelinov]

Do you have any sugestion?

[drVelinov]

What you think about Daline?Answer me please.

[GM]

Greets!

T/S specs? Anyway, Dalines work best with low Qts, Vas drivers, otherwise the cab can get really big.

GM

[drVelinov]

Here what i got.Driver is 6,5 inch 130w,8ohm.kevlar membrana.


B&W CWM650:

- Mechanical Parameters -

Fs = 74Hz
Qms = 4,653
Vas = 7,558 liters
Cms = 0,332 mm/N
Mms = 13,95 g
Rms = 1,394 kg/s
P-Dia = 127 mm
Sd = 126,7 sq.cm

- Electrical Parameters -

Qes = 0,824
Re = 3,91 Ohm
Le = 0,328 mH
Z = 4 Ohm
BL = 5.547 Tm
Pe = 60 watts

- Electromech. Parameters -

Qts = 0,7
no = 0,358 %
1-W SPL = 87.69 dB
2.83-V SPL = 90.8 dB

[planet10]

Nice looking driver (for the yellow kevlar look). Qt is high for any BR enclousre, but the parameters look decent for an alpha TL.

Here is a small spreadsheet GM did for calculating an alpha TL.

dave

[GM]

Greets!

I'm curious where you found these, all I found in a search was an in-wall speaker with just basic specs. Anyway, these are best suited for a relatively large sealed cab or well stuffed (~aperiodic) TL to mimic an IB. Frankly, considering the high Fs, sticking it in a 1-1.5 ft^3 sealed cab is what I'd do. If you want a TL, then Rick's Alpha TL design tuned to ~104 Hz is as good as any for a ~compact cab:

L = 29.21"
CSA (w x d) = 73.613"^2

Stuff to suit, a sim suggests 36 oz distributed along ~80% of the line or a bit more if a more IB like response is desired.

For sure it's not suitable for a Daline. With no Xmax given, no idea what the excursion limited power might be.

GM

[GM]

Originally posted by planet10
Nice looking driver (for the yellow kevlar look). Qt is high for any BR enclousre, but the parameters look decent for an alpha TL.

Here is a small spreadsheet GM did for calculating an alpha TL.

dave

Greets!

Oops! I forgot I was supposed to make the spreadsheet more user friendly. Maybe I'll have some time this week. At least it's on my long 'to do' list now.

GM

[BassAwdyO]

Another thread using the SAME speaker....

http://www.diyaudio.com/forums/showt...threadid=49041