Good comments by the others. I would particularly emphasize the question by Swampwalker about how the speaker impedance varies with frequency, if that can be determined.
A lot of two-way speakers have considerably lower impedances at most of the frequencies that are handled by the woofer than their impedance at most of the frequencies that are handled by the tweeter. The impedance often being around 4 ohms at lower frequencies and around 8 ohms at higher frequencies. That can often signify that the speaker is best suited for use with solid state amplification, as the interaction of that kind of impedance variation with the relatively high output impedance of a tube amp, especially a SET amp, will tend to result in excess brightness.
That effect will be somewhat less if the 4 ohm taps are used rather than the 8 ohm taps, so as was suggested you should definitely try the 4 ohm taps if you already haven't. And if you are presently using the 8 ohm taps, going to the 4 ohm taps would also help with respect to the gain issue, although probably just slightly.
Good luck. Regards,
-- Al
A lot of two-way speakers have considerably lower impedances at most of the frequencies that are handled by the woofer than their impedance at most of the frequencies that are handled by the tweeter. The impedance often being around 4 ohms at lower frequencies and around 8 ohms at higher frequencies. That can often signify that the speaker is best suited for use with solid state amplification, as the interaction of that kind of impedance variation with the relatively high output impedance of a tube amp, especially a SET amp, will tend to result in excess brightness.
That effect will be somewhat less if the 4 ohm taps are used rather than the 8 ohm taps, so as was suggested you should definitely try the 4 ohm taps if you already haven't. And if you are presently using the 8 ohm taps, going to the 4 ohm taps would also help with respect to the gain issue, although probably just slightly.
Good luck. Regards,
-- Al