Will the Cinema 70s damage the Q750?

No. The Cinema 70s is rated for the Q750's 8 Ω load as it comes.

What impedance setting should I use for the Q750 on the Cinema 70s?

None: the Q750 is 8 Ω, and the Cinema 70s needs no change for it.

Is the Cinema 70s powerful enough for the Q750?

Comfortable. From a seat 2 m away, loud 95 dB movie peaks take about 21 W per speaker, and the Cinema 70s is rated 50 W per channel. Cinema reference level, 105 dB peaks, takes about 201 W.

Does the KEF Q750 work with the Marantz Cinema 70s?

Verdict

Yes

The Q750 is 8 Ω, and the Cinema 70s 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

50 W

Comfortable. About 21 W gives 95 dB peaks at 2 m

How to connect them

Connect the Q750 speakers to the Cinema 70s's front terminals with speaker wire.
Run Audyssey MultEQ XT with its microphone at your seat.

Plan the Q750 and Cinema 70s 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

Marantz Cinema 70s

Amplifier channels: 7
Height formats: Dolby Atmos, DTS:X
Lowest speaker impedance: 4 Ω
MSRP: $1,300 each (MSRP, September 2026)

All Cinema 70s specs and pairings

Questions about the Q750 and Cinema 70s

Does the Q750 work with the Cinema 70s?: Yes. The Q750 is 8 Ω, and the Cinema 70s is rated for speakers down to 4 Ω, so it drives them as is.
Will the Cinema 70s damage the Q750?: No. The Cinema 70s is rated for the Q750's 8 Ω load as it comes.
What impedance setting should I use for the Q750 on the Cinema 70s?: None: the Q750 is 8 Ω, and the Cinema 70s needs no change for it.
Is the Cinema 70s powerful enough for the Q750?: Comfortable. From a seat 2 m away, loud 95 dB movie peaks take about 21 W per speaker, and the Cinema 70s is rated 50 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 + Marantz Cinema 70sWorks
Klipsch RP-8000F II + Marantz Cinema 70sWorks

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.