Will the AT525NC damage the Motion XT C100?

No. The AT525NC is rated for the Motion XT C100's 5 Ω load as it comes.

What impedance setting should I use for the Motion XT C100 on the AT525NC?

None: the Motion XT C100 is 5 Ω, and the AT525NC needs no change for it.

Is the AT525NC powerful enough for the Motion XT C100?

More than you need. From a seat 2 m away, loud 95 dB movie peaks take about 7 W per speaker, and the AT525NC is rated 200 W per channel. Cinema reference level, 105 dB peaks, takes about 64 W.

Does the MartinLogan Motion XT C100 work with the ATI AT525NC?

Verdict

Yes

The Motion XT C100 is 5 Ω, and the AT525NC is rated for speakers down to 4 Ω, so it drives them as is.

Speaker load

5 Ω speaker, rated down to 4 Ω

Power

200 W

More than you need. About 7 W gives 95 dB peaks at 2 m

How to connect them

Connect the AT525NC's inputs to the pre-outs of your receiver or processor: a power amplifier has no volume control of its own.
Connect each Motion XT C100 to one of the AT525NC's channels with speaker wire.

Plan the Motion XT C100 and AT525NC 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 XT C100

Impedance: 5 Ω
Sensitivity: 93 dB
Recommended amplifier power: 20–300 W
MSRP: $1,600 each (MSRP, September 2026)

All Motion XT C100 specs and pairings

ATI AT525NC

Channels: 5
Lowest impedance: 4 Ω
MSRP: $3,995 each (MSRP, September 2026)

All AT525NC specs and pairings

Questions about the Motion XT C100 and AT525NC

Does the Motion XT C100 work with the AT525NC?: Yes. The Motion XT C100 is 5 Ω, and the AT525NC is rated for speakers down to 4 Ω, so it drives them as is.
Will the AT525NC damage the Motion XT C100?: No. The AT525NC is rated for the Motion XT C100's 5 Ω load as it comes.
What impedance setting should I use for the Motion XT C100 on the AT525NC?: None: the Motion XT C100 is 5 Ω, and the AT525NC needs no change for it.
Is the AT525NC powerful enough for the Motion XT C100?: More than you need. From a seat 2 m away, loud 95 dB movie peaks take about 7 W per speaker, and the AT525NC is rated 200 W per channel. Cinema reference level, 105 dB peaks, takes about 64 W.

Swap one of them

MartinLogan Motion XT C100 + Denon AVR-X6800HNeeds a setting change
MartinLogan Motion XT C100 + Parasound Halo A 21+Works
Focal Vestia N°3 + ATI AT525NCWorks
KEF Q11 Meta + ATI AT525NCWorks

References

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

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