Will the TX-NR6100 damage the Motion AFX?

No. The TX-NR6100 is rated for the Motion AFX's 4 Ω load as it comes.

What impedance setting should I use for the Motion AFX on the TX-NR6100?

None: the Motion AFX is 4 Ω, and the TX-NR6100 needs no change for it.

Is the TX-NR6100 powerful enough for the Motion AFX?

Comfortable. From a seat 2 m away, loud 95 dB movie peaks take about 51 W per speaker, and the TX-NR6100 is rated 100 W per channel. Cinema reference level, 105 dB peaks, takes about 504 W.

Does the MartinLogan Motion AFX work with the Onkyo TX-NR6100?

Verdict

Yes

The Motion AFX is 4 Ω, and the TX-NR6100 is rated for speakers down to 4 Ω, so it drives them as is.

Speaker load

4 Ω speaker, rated down to 4 Ω

Power

100 W

Comfortable. About 51 W gives 95 dB peaks at 2 m

Height decoding

Yes

Dolby Atmos and DTS:X

How to connect them

Connect the Motion AFX speakers to the TX-NR6100's height terminals with speaker wire.
Run AccuEQ with its microphone at your seat.

Plan the Motion AFX and TX-NR6100 in your own room.

Draw your room in 3D, place both, and see every connection checked and how loud they play at your seat. Designing is free.

Build it in your room

The specs that decide it

MartinLogan Motion AFX

Impedance: 4 Ω
Sensitivity: 87 dB (2.83 V, 1 m)
Recommended amplifier power: 20–200 W
MSRP: $600 a pair (MSRP, September 2026)

All Motion AFX specs and pairings

Onkyo TX-NR6100

Amplifier channels: 7
Height formats: Dolby Atmos, DTS:X
Lowest speaker impedance: 4 Ω
MSRP: $799 each (MSRP, May 2025)

All TX-NR6100 specs and pairings

Questions about the Motion AFX and TX-NR6100

Does the Motion AFX work with the TX-NR6100?: Yes. The Motion AFX is 4 Ω, and the TX-NR6100 is rated for speakers down to 4 Ω, so it drives them as is.
Will the TX-NR6100 damage the Motion AFX?: No. The TX-NR6100 is rated for the Motion AFX's 4 Ω load as it comes.
What impedance setting should I use for the Motion AFX on the TX-NR6100?: None: the Motion AFX is 4 Ω, and the TX-NR6100 needs no change for it.
Is the TX-NR6100 powerful enough for the Motion AFX?: Comfortable. From a seat 2 m away, loud 95 dB movie peaks take about 51 W per speaker, and the TX-NR6100 is rated 100 W per channel. Cinema reference level, 105 dB peaks, takes about 504 W.

Swap one of them

MartinLogan Motion AFX + Yamaha RX-V6ANeeds a setting change
Klipsch RP-500SA II + Onkyo TX-NR6100Works
Klipsch RP-500M II + Onkyo TX-NR6100Works

References

Specs verified against the manufacturer's published data. Last checked September 15, 2026.

Brand names are trademarks of their owners. Not affiliated with or endorsed by any manufacturer. 3D models are our approximations. Prices are manufacturer list prices (MSRP) as of the month shown. How we earn from buy links: affiliate disclosure.