Will the VSX-LX505 damage the Q250c?

No. The VSX-LX505 is rated for the Q250c's 8 Ω load as it comes.

What impedance setting should I use for the Q250c on the VSX-LX505?

None: the Q250c is 8 Ω, and the VSX-LX505 needs no change for it.

Is the VSX-LX505 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 VSX-LX505 is rated 120 W per channel. Cinema reference level, 105 dB peaks, takes about 253 W.

Does the KEF Q250c work with the Pioneer VSX-LX505?

Verdict

Yes

The Q250c is 8 Ω, and the VSX-LX505 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

120 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 VSX-LX505's front terminals with speaker wire.
Run Advanced MCACC with its microphone at your seat.

Plan the Q250c and VSX-LX505 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

Pioneer VSX-LX505

Amplifier channels: 9
Height formats: Dolby Atmos, DTS:X
Lowest speaker impedance: 4 Ω
MSRP: $1,399 each (MSRP, February 2025)

All VSX-LX505 specs and pairings

Questions about the Q250c and VSX-LX505

Does the Q250c work with the VSX-LX505?: Yes. The Q250c is 8 Ω, and the VSX-LX505 is rated for speakers down to 4 Ω, so it drives them as is.
Will the VSX-LX505 damage the Q250c?: No. The VSX-LX505 is rated for the Q250c's 8 Ω load as it comes.
What impedance setting should I use for the Q250c on the VSX-LX505?: None: the Q250c is 8 Ω, and the VSX-LX505 needs no change for it.
Is the VSX-LX505 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 VSX-LX505 is rated 120 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.

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