Will the XPA-2 Gen3 damage the Motion XT B100?

No. The XPA-2 Gen3 is rated for the Motion XT B100's 4 Ω load as it comes.

What impedance setting should I use for the Motion XT B100 on the XPA-2 Gen3?

None: the Motion XT B100 is 4 Ω, and the XPA-2 Gen3 needs no change for it.

Is the XPA-2 Gen3 powerful enough for the Motion XT B100?

More than you need. From a seat 2 m away, loud 95 dB movie peaks take about 7 W per speaker, and the XPA-2 Gen3 is rated 300 W per channel. Cinema reference level, 105 dB peaks, takes about 64 W.

Does the MartinLogan Motion XT B100 work with the Emotiva XPA-2 Gen3?

Verdict

Yes

The Motion XT B100 is 4 Ω, and the XPA-2 Gen3 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

300 W

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

How to connect them

Connect the XPA-2 Gen3'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 B100 to one of the XPA-2 Gen3's channels with speaker wire.

Plan the Motion XT B100 and XPA-2 Gen3 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 B100

Impedance: 4 Ω
Sensitivity: 93 dB
Recommended amplifier power: 20–250 W
MSRP: $850 each (MSRP, September 2026)

All Motion XT B100 specs and pairings

Emotiva XPA-2 Gen3

Channels: 2
Lowest impedance: 4 Ω
MSRP: $1,499 each (MSRP, September 2026)

All XPA-2 Gen3 specs and pairings

Questions about the Motion XT B100 and XPA-2 Gen3

Does the Motion XT B100 work with the XPA-2 Gen3?: Yes. The Motion XT B100 is 4 Ω, and the XPA-2 Gen3 is rated for speakers down to 4 Ω, so it drives them as is.
Will the XPA-2 Gen3 damage the Motion XT B100?: No. The XPA-2 Gen3 is rated for the Motion XT B100's 4 Ω load as it comes.
What impedance setting should I use for the Motion XT B100 on the XPA-2 Gen3?: None: the Motion XT B100 is 4 Ω, and the XPA-2 Gen3 needs no change for it.
Is the XPA-2 Gen3 powerful enough for the Motion XT B100?: More than you need. From a seat 2 m away, loud 95 dB movie peaks take about 7 W per speaker, and the XPA-2 Gen3 is rated 300 W per channel. Cinema reference level, 105 dB peaks, takes about 64 W.

Swap one of them

MartinLogan Motion XT B100 + Marantz Cinema 70sWorks
MartinLogan Motion XT B100 + Denon AVR-X3800HNeeds a setting change
KEF Q6 Meta + Emotiva XPA-2 Gen3Works
KEF Q750 + Emotiva XPA-2 Gen3Works

References

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

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