I found this at www.radioshack.com It's not the complete T/S params, but it's a start. I'd do a search on the Full Range Driver Forum http://f18.parsimony.net/forum31999/ to see if the info is there. If not, post a message. Many folks on that forum have worked with the RS 40-1197. MikeS
GENERAL
Nominal Impedance:.........................8 Ohm +/- 15% at 1.6 V & 400 Hz
Resonance Frequency:..............................80 Hz +/- 15 Hz at 1.6 V
Sound Pressure Level:................................90 dB/W (1m) +/- 2 dB
Power Handling Capacity:...............................................3 W
Music Power:..........................................................15 W
Weight:...................................................590 g (20.85 oz)
MAGNET
Dimensions:................................................80 x 40 x 10 mm
Weight:..................................................188.5 g (6.65 oz)
VOICE COIL
Nominal Diameter:......................................20.32 mm (0.8 inch)
Bobbin Material:.....................................................Paper
Wire Size:.........................................................0.12 mm
DC Resistance:.....................................................7.6 Ohm
Turns/Layers:............................................76 Turns/2 Layers
Winding Length:.....................................................5.6 mm
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