Thanks in advance!

Brand Electro Voice
Model EVM-15B
Description
Range / type Woofer
Typical use PA
Recomended enclosure
Series Pro-Line
Manufacturer
Order nr
Production status Discontinued
Nom. diamerer [inch] 15
Vas [Liters] 260
Qts 0,3
Qes 0,31
Qms 13
Fs [Hz] 43
Sensitivity [dB] 101
Max Power [W] 400
Power definition continous
Lower freq [Hz] 60
Upper freq [Hz] 3500
Rec. Filter freq [Hz]
xmax [mm] 3,25
Moving mass [g] 48
Disp area [m2] 0,086
Disp Vol [cm3]
xdamage [mm] 12,5
Air gap [mm]
Coil height [mm]
Coil diameter [mm] 62,5
Cms [mm/N] 0,214
Rms [N*s/m] 1,4
Magnet weight [gr] 2,225
Magnet height [mm]
Magnet diameter [mm]
Magnet material -
Re [ohm] 5,2
Z [ohm] 8
L [mH] 0,5
Bl [Tm] 17,5
Magnetic flux [Wb]
Flux density [T]
Outer diam. [mm]
Bolt circle [mm]
Nr of bolts [Nr]
Cutout [mm]
Weight [Kg] 9,08
Height [mm]
Depth [mm]
Driver volume [Liters]
Frequency SPL / Z
Home page [URL] http://www.electrovoice.com
Data sheet [URL}
Enterd by -
Date reviewed 2003-11-09
Date added 2003-11-09

The EVM series and the SP series aren't the same. The SP-15B is a smaller magnet version of the SP-15, both of which were originally designed for hi-fi use (complete with whizzer cone). They are lower Fs, higher Qts, and lower sensitivity than the EVM's. The Electrovoice website does give a suggested box/vent size, but I'd sure like to find the detailed T/S numbers and see what a Pi-aligned enclosure would look like.

Thanks very much for the info, and your effort. The search continues ...

James

• More TS parameters

I'm probably wrong, but the limited literature I've been able to find on the EV SP-15B indicates that it's closer to the SP-15, both with whizzer cones, ceramic mags, stamped-steel baskets, and intended for hi-fi use. The SP-15 even had a midrange/treble control. The SP-15A has a cast basket, and an Alnico mag (I think).

You may well be right that there is little difference among them, but in one piece of EV lit I found regarding the SP-15B, it was suggested that it's best use was in an infinite baffle. If I understand that application correctly, which I probably don't, then it might be that the SP-15B has a much higher Qts, making it a very different animal.

I think I'm going to get that woofer tester from PE.

Thanks again for the link ... I found info on several other speakers I was having trouble finding.

Happy Thanksgiving to all!

Best,

Jim

• Smith & Larson measurement equipment

Happy Thanksgiving!
Bill