Lacking any more sophisiticated measuring equipment right now than a Radio Shack SPL meter, is there any formula that can be used with SPL measurements to "rough in" a different sensitivity tweeter replacement in an old two way speaker? I'm assuming that at the same input level, the tweeter is going to be much lower SPL than the mid/woofer, but hoping that that difference is linear enough at different levels to be able to apply a formula.
It's presently got a protection cap and single 2ohm resistor in series with the tweeter. Along with the new tweeter I plan on replacing the series resistor with a circuit from the following table
http://reviews.ebay.co.uk/Tweeter-At...00000004030106
Do I understand the theory correctly here in that if I were to simply put a 23ohm resistor parallel on the present 2ohm series circuit, the level and FR of the tweeter would remain unchanged but the load on the amplifier would be more 8 ohm normalized?
If an SPL meter is not useful, is level matching pretty much always done by ear?
It's presently got a protection cap and single 2ohm resistor in series with the tweeter. Along with the new tweeter I plan on replacing the series resistor with a circuit from the following table
http://reviews.ebay.co.uk/Tweeter-At...00000004030106
Do I understand the theory correctly here in that if I were to simply put a 23ohm resistor parallel on the present 2ohm series circuit, the level and FR of the tweeter would remain unchanged but the load on the amplifier would be more 8 ohm normalized?
If an SPL meter is not useful, is level matching pretty much always done by ear?