diy tl speakers with b&w cwm650

Status
This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.
Jump to Latest
J

jorgovanko

Member
Joined 2003
B&W CWM650 driver and Vifa D27TG-05-06

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.
 

Attachments

  • b&w_cwm650_2.jpg
    b&w_cwm650_2.jpg
    26.7 KB · Views: 352
D

drVelinov

Member
Joined 2005
ts parameters

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
 
GM

GM

Member
Joined 2003
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

GM

Member
Joined 2003
planet10 said:
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
Click to expand...

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
 
Status
This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.
Top Bottom