Does the Motion XT B100 work with the AVR-X3800H?

Yes, with one setting change. The Motion XT B100 is 4 Ω: set the receiver to 4 Ω in its speaker setup.

Will the AVR-X3800H damage the Motion XT B100?

Not once it is set up for it: the AVR-X3800H is rated for a 4 Ω speaker with its speaker impedance set to 4 Ω.

Is the AVR-X3800H 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 AVR-X3800H is rated 105 W per channel. Cinema reference level, 105 dB peaks, takes about 64 W.

Does the MartinLogan Motion XT B100 work with the Denon AVR-X3800H?

Verdict

Yes, set it to 4 Ω

The Motion XT B100 is 4 Ω: set the receiver to 4 Ω in its speaker setup.

Speaker load

Set 4 Ω

4 Ω speaker, change it in speaker setup

Power

105 W

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

How to connect them

Connect the Motion XT B100 speakers to the AVR-X3800H's front terminals with speaker wire.
In the AVR-X3800H's speaker setup, set speaker impedance to 4 Ω.
Run Audyssey MultEQ XT32 with its microphone at your seat.

Plan the Motion XT B100 and AVR-X3800H 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

Denon AVR-X3800H

Amplifier channels: 9
Height formats: Dolby Atmos, DTS:X
Lowest speaker impedance: 4 Ω
MSRP: $1,799 each (MSRP, September 2026)

All AVR-X3800H specs and pairings

Questions about the Motion XT B100 and AVR-X3800H

Does the Motion XT B100 work with the AVR-X3800H?: Yes, with one setting change. The Motion XT B100 is 4 Ω: set the receiver to 4 Ω in its speaker setup.
Will the AVR-X3800H damage the Motion XT B100?: Not once it is set up for it: the AVR-X3800H is rated for a 4 Ω speaker with its speaker impedance set to 4 Ω.
What impedance setting should I use for the Motion XT B100 on the AVR-X3800H?: 4 Ω. Set the receiver to 4 Ω in its speaker setup.
Is the AVR-X3800H 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 AVR-X3800H is rated 105 W per channel. Cinema reference level, 105 dB peaks, takes about 64 W.

Swap one of them

MartinLogan Motion XT B100 + Emotiva XPA-2 Gen3Works
MartinLogan Motion XT B100 + Marantz Cinema 70sWorks
KEF Q6 Meta + Denon AVR-X3800HNeeds a setting change
KEF Q750 + Denon AVR-X3800HWorks

References

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

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