Will the Cinema 50 damage the Lumina III?

No. The Cinema 50 is rated for the Lumina III's 4 Ω load as it comes.

What impedance setting should I use for the Lumina III on the Cinema 50?

None: the Lumina III is 4 Ω, and the Cinema 50 needs no change for it.

Is the Cinema 50 powerful enough for the Lumina III?

More than you need. From a seat 2 m away, loud 95 dB movie peaks take about 32 W per speaker, and the Cinema 50 is rated 110 W per channel. Cinema reference level, 105 dB peaks, takes about 318 W.

Does the Sonus faber Lumina III work with the Marantz Cinema 50?

Verdict

Yes

The Lumina III is 4 Ω, and the Cinema 50 is rated for speakers down to 4 Ω, so it drives them as is.

Speaker load

4 Ω speaker, rated down to 4 Ω

Power

110 W

More than you need. About 32 W gives 95 dB peaks at 2 m

How to connect them

Connect the Lumina III speakers to the Cinema 50's front terminals with speaker wire.
Run Audyssey MultEQ XT32 with its microphone at your seat.

Plan the Lumina III and Cinema 50 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

Sonus faber Lumina III

Impedance: 4 Ω
Sensitivity: 89 dB (2.83 V, 1 m)
Recommended amplifier power: 50–250 W
MSRP: $3,000 a pair (MSRP, September 2026)

All Lumina III specs and pairings

Marantz Cinema 50

Amplifier channels: 9
Height formats: Dolby Atmos, DTS:X
Lowest speaker impedance: 4 Ω
MSRP: $2,800 each (MSRP, September 2026)

All Cinema 50 specs and pairings

Questions about the Lumina III and Cinema 50

Does the Lumina III work with the Cinema 50?: Yes. The Lumina III is 4 Ω, and the Cinema 50 is rated for speakers down to 4 Ω, so it drives them as is.
Will the Cinema 50 damage the Lumina III?: No. The Cinema 50 is rated for the Lumina III's 4 Ω load as it comes.
What impedance setting should I use for the Lumina III on the Cinema 50?: None: the Lumina III is 4 Ω, and the Cinema 50 needs no change for it.
Is the Cinema 50 powerful enough for the Lumina III?: More than you need. From a seat 2 m away, loud 95 dB movie peaks take about 32 W per speaker, and the Cinema 50 is rated 110 W per channel. Cinema reference level, 105 dB peaks, takes about 318 W.

Swap one of them

References

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

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