Will the TX-NR7100 damage the Q250c?

No. The TX-NR7100 is rated for the Q250c's 8 Ω load as it comes.

What impedance setting should I use for the Q250c on the TX-NR7100?

None: the Q250c is 8 Ω, and the TX-NR7100 needs no change for it.

Is the TX-NR7100 powerful enough for the Q250c?

More than you need. From a seat 2 m away, loud 95 dB movie peaks take about 26 W per speaker, and the TX-NR7100 is rated 100 W per channel. Cinema reference level, 105 dB peaks, takes about 253 W.

Does the KEF Q250c work with the Onkyo TX-NR7100?

Verdict

Yes

The Q250c is 8 Ω, and the TX-NR7100 is rated for speakers down to 4 Ω, so it drives them as is.

Speaker load

8 Ω speaker, rated down to 4 Ω

Power

100 W

More than you need. About 26 W gives 95 dB peaks at 2 m

How to connect them

Connect the Q250c speakers to the TX-NR7100's front terminals with speaker wire.
Run Dirac Live with its microphone at your seat.

Plan the Q250c and TX-NR7100 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

KEF Q250c

Impedance: 8 Ω
Sensitivity: 87 dB (2.83 V, 1 m)
Recommended amplifier power: 10–100 W
MSRP: $600 each (MSRP, October 2025)

All Q250c specs and pairings

Onkyo TX-NR7100

Amplifier channels: 9
Height formats: Dolby Atmos, DTS:X
Lowest speaker impedance: 4 Ω
MSRP: $1,300 each (MSRP, August 2024)

All TX-NR7100 specs and pairings

Questions about the Q250c and TX-NR7100

Does the Q250c work with the TX-NR7100?: Yes. The Q250c is 8 Ω, and the TX-NR7100 is rated for speakers down to 4 Ω, so it drives them as is.
Will the TX-NR7100 damage the Q250c?: No. The TX-NR7100 is rated for the Q250c's 8 Ω load as it comes.
What impedance setting should I use for the Q250c on the TX-NR7100?: None: the Q250c is 8 Ω, and the TX-NR7100 needs no change for it.
Is the TX-NR7100 powerful enough for the Q250c?: More than you need. From a seat 2 m away, loud 95 dB movie peaks take about 26 W per speaker, and the TX-NR7100 is rated 100 W per channel. Cinema reference level, 105 dB peaks, takes about 253 W.

Swap one of them

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.