HiFi Subjectivist ¦ Audio Forum ¦ NVA User Group

Good evening guys, my friend asked me to try my AP20 on his Kef speakers. Kef impedence is 4 ohm. I don't remember if our ampli is designed to work with 4 ohm speakers. I am ising NVA speaker cables.
kef 103/4 reference from the 90's.
Thanks in advance

It depends on the shape of the curve - how long it is down around that number, and at what frequencies.

Can you post the plot for it?

If that 4 ohms is the nominal figure quoted by the manufacturer then it is likely to dip even lower than 4 ohms.

karatestu wrote: ↑Wed Sep 30, 2020 4:18 pm If that 4 ohms is the nominal figure quoted by the manufacturer then it is likely to dip even lower than 4 ohms.

Yes, but if it is in the high frequencies it will be benign to NVA amps. If it is in the low frequencies, the NVA amps will not like it.

MarcoPisa wrote: ↑Wed Sep 30, 2020 4:22 pm https://us.kef.com/explore-kef/kef-muse ... 34-1992-95

Required power: 50 to 200 watts.

The AP20 is around 35 watts.

Complex looking crossover.

Not what NVA is designed for.

Thanks a lot. Do I risk to spoil the ampli if I test it with those speakers?

Keep a check on the temperature of the amp (place your hand under and along the acrylic base). NVA amps should run moderately warm, at the very most. If it is too hot to touch, it's too late.

I cannot see the AP20 being a good match for those KEFs, regardless.

Thanks again

Don’t risk it