Will the AT525NC damage the Lumina III?

No. The AT525NC 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 AT525NC?

None: the Lumina III is 4 Ω, and the AT525NC needs no change for it.

Is the AT525NC 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 AT525NC is rated 200 W per channel. Cinema reference level, 105 dB peaks, takes about 318 W.

Does the Sonus faber Lumina III work with the ATI AT525NC?

Verdict

Yes

The Lumina III is 4 Ω, and the AT525NC 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

200 W

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

How to connect them

Connect the AT525NC's inputs to the pre-outs of your receiver or processor: a power amplifier has no volume control of its own.
Connect each Lumina III to one of the AT525NC's channels with speaker wire.

Plan the Lumina III and AT525NC 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

ATI AT525NC

Channels: 5
Lowest impedance: 4 Ω
MSRP: $3,995 each (MSRP, September 2026)

All AT525NC specs and pairings

Questions about the Lumina III and AT525NC

Does the Lumina III work with the AT525NC?: Yes. The Lumina III is 4 Ω, and the AT525NC is rated for speakers down to 4 Ω, so it drives them as is.
Will the AT525NC damage the Lumina III?: No. The AT525NC 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 AT525NC?: None: the Lumina III is 4 Ω, and the AT525NC needs no change for it.
Is the AT525NC 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 AT525NC is rated 200 W per channel. Cinema reference level, 105 dB peaks, takes about 318 W.

Swap one of them

Sonus faber Lumina III + Denon AVR-X6800HNeeds a setting change
Sonus faber Lumina III + Parasound Halo A 21+Works
Bowers & Wilkins 603 S3 + ATI AT525NCWorks
MartinLogan Motion XT F100 + ATI AT525NCWorks

References

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

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