New Tweeters: In or Out of Phase?

.5 dB is most likely the cause of the brightness you're hearing. If you know what you're doing, you could add a resistor to bring the level on the tweeter back to normal. A less optimal option would be to adjust the treble on your preamp.

Phase is crucial. Checking it is easy. Take a C or D cell battery and connect the + to one lead, the - to the other. If the dome moves forward, you have the + to wired to the + on the tweeter, if backward, then you know that the - is connected to the + on the tweeter. Usually there's some indication of which lead is the positive.

You also need to know whether the original tweeters were wired in phase or out. Depending on the crossover, out of phase might be correct.

If you have the phase is wrong, there will be a very audible drop in the frequency response in the crossover region. Use an SPL meter and a test CD with sine waves to double check.

Hi

All Vifa tweeters have a positive indicatuion of +/- its "moulded" into the face plate on the back can be hard to see but it is there - another way to chack is apply a battery to the terminals of the tweeter, positive to the positive terminal and negative to the negative terminal will result in a outwards movement of the dome.

Thanks

Peter

Don't be afraid to put a resistor in series with the tweeter. The crossover probably already has such a resistor (called the "tweeter padding resistor). Just increase its value until you like the sound.