Will the AVR-X1800H damage the Q750?

No. The AVR-X1800H is rated for the Q750's 8 Ω load as it comes.

What impedance setting should I use for the Q750 on the AVR-X1800H?

None: the Q750 is 8 Ω, and the AVR-X1800H needs no change for it.

Is the AVR-X1800H powerful enough for the Q750?

More than you need. From a seat 2 m away, loud 95 dB movie peaks take about 21 W per speaker, and the AVR-X1800H is rated 80 W per channel. Cinema reference level, 105 dB peaks, takes about 201 W.

Does the KEF Q750 work with the Denon AVR-X1800H?

Verdict

Yes

The Q750 is 8 Ω, and the AVR-X1800H 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

80 W

More than you need. About 21 W gives 95 dB peaks at 2 m

How to connect them

Connect the Q750 speakers to the AVR-X1800H's front terminals with speaker wire.
Run Audyssey MultEQ XT with its microphone at your seat.

Plan the Q750 and AVR-X1800H 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 Q750

Impedance: 8 Ω
Sensitivity: 88 dB (2.83 V, 1 m)
Recommended amplifier power: 15–150 W
MSRP: $900 each (MSRP, January 2025)

All Q750 specs and pairings

Denon AVR-X1800H

Amplifier channels: 7
Height formats: Dolby Atmos, DTS:X
Lowest speaker impedance: 4 Ω
MSRP: $849 each (MSRP, September 2026)

All AVR-X1800H specs and pairings

Questions about the Q750 and AVR-X1800H

Does the Q750 work with the AVR-X1800H?: Yes. The Q750 is 8 Ω, and the AVR-X1800H is rated for speakers down to 4 Ω, so it drives them as is.
Will the AVR-X1800H damage the Q750?: No. The AVR-X1800H is rated for the Q750's 8 Ω load as it comes.
What impedance setting should I use for the Q750 on the AVR-X1800H?: None: the Q750 is 8 Ω, and the AVR-X1800H needs no change for it.
Is the AVR-X1800H powerful enough for the Q750?: More than you need. From a seat 2 m away, loud 95 dB movie peaks take about 21 W per speaker, and the AVR-X1800H is rated 80 W per channel. Cinema reference level, 105 dB peaks, takes about 201 W.

Swap one of them

KEF Q750 + Emotiva XPA-2 Gen3Works
KEF Q750 + Denon AVR-X3800HWorks
KEF Q350 + Denon AVR-X1800HWorks
Bowers & Wilkins 606 S3 + Denon AVR-X1800HWorks

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.