Looking into buying a used ZMA to go with a pair of Tonians I just bought with 16 ohm PHY drivers. The amp in question has 4 ohm and 8 ohm taps according to the owner. How much degradation (if any) would I get using the 8 ohm taps to drive a 16 ohm speaker? Speaker in question is 99db efficiency of that makes a difference here.

I know in general it's OK but my understanding is that any potential dropoff in sound quality from using the wrong taps varies on amp to amp basis. Wasn't sure what the case was with the ZMA.

Thanks.