@dentdog, that sounds like a very nice pairing to me.
It appears that the amp would be driving a pair of "full range" drivers in your Zu Def IVs that are specified to cover 30 Hz to 12 kHz, plus a tweeter. While the speaker also incorporates a powered sub specified to cover 12 Hz to 80 Hz. Given that the speaker is an easy load the phase angles of its impedance probably don’t reach any extreme values, i.e., the impedance is probably mainly resistive. In which case it can be calculated that the dip from 8 ohms to 6 ohms, driven by 2.5 ohms, would result in a dip in frequency response of only about 0.7 db, relative to the response a very low output impedance would result in. And if that proves to be noticeable, which I doubt, chances are that a slight tweak of the controls of the speaker’s subwoofer section would compensate.
Enjoy the new amp! Regards,
-- Al
It appears that the amp would be driving a pair of "full range" drivers in your Zu Def IVs that are specified to cover 30 Hz to 12 kHz, plus a tweeter. While the speaker also incorporates a powered sub specified to cover 12 Hz to 80 Hz. Given that the speaker is an easy load the phase angles of its impedance probably don’t reach any extreme values, i.e., the impedance is probably mainly resistive. In which case it can be calculated that the dip from 8 ohms to 6 ohms, driven by 2.5 ohms, would result in a dip in frequency response of only about 0.7 db, relative to the response a very low output impedance would result in. And if that proves to be noticeable, which I doubt, chances are that a slight tweak of the controls of the speaker’s subwoofer section would compensate.
Enjoy the new amp! Regards,
-- Al