Hi guys.
I am searching for a suitable tweeter to match my P17RCY to be used as a mid.
The P17RCY is quite sensitive, at 91dB 1w/1m, but what does that translate to in 2,83v/1m?
I get that it has to do with the voice coil resistance, ie the same driver in 4 ohm will have a higher rating than a 8 ohm version, but how do I get the 1w/1m sensitivity calculated over to 2,83v/1m?
This is probably quite simple, I just don't know how to do it and thus, I ask you 🙂
I am searching for a suitable tweeter to match my P17RCY to be used as a mid.
The P17RCY is quite sensitive, at 91dB 1w/1m, but what does that translate to in 2,83v/1m?
I get that it has to do with the voice coil resistance, ie the same driver in 4 ohm will have a higher rating than a 8 ohm version, but how do I get the 1w/1m sensitivity calculated over to 2,83v/1m?
This is probably quite simple, I just don't know how to do it and thus, I ask you 🙂
Ohms law, 2.83v at 8 ohms gives 1W, when you keep the voltage the same and change the impedance the current changes. A 4 ohm load draws twice as much current as an 8 ohm one at the same voltage.
Use this calculator to make it easy
Voltage current resistance and electric power calculation
Most manufacturers use 2.83v as the test input for all drivers and then give the sensitivity figure based on a nominal impedance which is never unlikely to be the same across the whole bandwidth.
Use this calculator to make it easy
Voltage current resistance and electric power calculation
Most manufacturers use 2.83v as the test input for all drivers and then give the sensitivity figure based on a nominal impedance which is never unlikely to be the same across the whole bandwidth.
@MIJK explained the power part. My question is, why do you ask? I assume you are trying to match a tweeter? Do you have a particular one in mind? Do you have a response curve for your P17RCY? If so, the best bet is to check SEAS curves made the same way. Every manufacturer does things a bit differently, so you cannot compare curves across manufacturers. The curves have to be made in the same way on the same equipment. Then for actual crossover work there is no substitute for doing your own measurements.