Interesting, havent been on there site in a while. Things have changed since they did 4ohm drivers. I remember the specs use to say 101dB sensitivity on the 8 ohms boxes (what I use).
Learned a thing or two, thanks everyone!
While the sensitivity has changed-the max output has not.
Voltage is a much better way to do it. Because you cannot put "power into a loudspeaker-only voltage. The power is a result of it.
For example with the TH115. Let's look at 2 freq that have the same sensitivity 51Hz and 80Hz. So with 10V applied (just a easy to work with number), the wattage at 51 hz is 4.5 watts while at 80Hz the wattage is 20 watts.
Also the current TH115 is NOT 4 ohms-as far as the load it presents to the amplifier.
4 ohms is simply the closest "standard" number for impedance. I would call it 5 ohms. So if you used the "wattage math" then the sensitivity would be off if using the 4 ohm number. yet the voltage sensitivity remains the same.
So if you applied the "wattage" spec then 51Hz would be way louder than 80Hz.
YET with any source material those freq are the same level.
