I am going to try SpeakOn terminated speaker wire with the AHB2 amp that I just bought. I will compare them with my existing Audience Conductor SE speaker wire and it's Banana plugs at the amp end.
https://www.soundstagehifi.com/index.php/opinion/1420-purifi-audios-pint-sized-powerhouses
Speaking of speakONs . . .
When I unpacked the Eigentakt and SPK5s and saw the Neutrik speakON connectors used throughout, I was relieved that Purifi had also sent a package that included the speakON-terminated cables needed to connect the Eigentakt to the SPK5s’ external crossovers and the crossovers to the speakers, as well as a set of cables terminated with speakONs at one end and banana plugs on the other, for connection to other speakers. Purifi makes these cables themselves, using CLS 425 bulk speaker wire made in Germany by Cardial.
Purifi’s reliance on speakONs intrigued me, so I asked them about it. Lars Risbo:
Nearly all binding posts and/or banana plugs available we found to be magnetic and added measurable hysteric distortion. The cheapest plastic speakON passed the test. It seems that Benchmark Media Systems came to the same conclusion with their very low distortion AHB2 amplifier.
Moreover, we run biwiring through the crossover filter to the speaker box. Using the four-pole speakON, we can join the branches right at the amplifier’s sense point, where the output impedance is extremely low. This effectively blocks leakage of distortion products between the drivers. This makes biwiring actually work.