Hand exercised only.
Loudspeaker parameters (Radio Shack advertised in paranthesis):
Fs = 39.09 Hz (39)
Re = 2.58 ohms[dc] (2.9)
Le = 154.64 uH
L2 = 516.05 uH
R2 = 13.01 ohms
Qt = 0.58 (0.59)
Qes = 0.70 (0.72)
Qms = 3.35 (3.26)
Mms = 24.34 grams
Rms = 1.784746 kg/s
Cms = 0.000681 m/N
Vas = 43.72 liters (36.8L)
Sd= 213.82 cm^2
Bl = 4.708406 Tm
ETA = 0.35 %
Lp(2.83V/1m) = 92.49 dB
Added Mass Method:
Added mass = 40.00 grams
Diameter= 16.50 cm
Soooo... reasonably close to advertised, and another good example of how drivers used to be engineered for sealed box applications, rather than just throwing a High Q motor under a cone and advertising them for use in sealed enclosures.
To wit: in one heavily stuffed cubic foot, this driver has F3/6/10 of 55/43/33 and a Q of 0.74
I calculate about 5mm +/- of coil throw, and I was not able to bottom the coil out against the back plate, so even with the 3.35mm "peak to peak" excursion advertised, I am guessing this woofer will exceed that figure fairly gracefully. I used to have a pair in an old S-10 Blazer and my experience seems to indicate my guess to be fairly accurate.
so here we have an 8" driver that will dig fairly low in a small sealed box whole offering very, very nice sensitivity (check out that 2.83V number, folks). This appears to be a reasonably well designed driver, even by modern budget driver standards.
Here is the impedance curve along with the overlay I took for calculating Vas:

Here is a modeled response:

Here are a couple snapshots of the driver itself:


Classic treated, ribbed paper cone and stamped basket. Wonderful walk down memory lane holding this in my hands.
I have a signature.
Comments
InDIYana Event Website