Will the TX-NR6100 damage the A4.2?

No. The TX-NR6100 is rated for the A4.2's 6 Ω load as it comes.

What impedance setting should I use for the A4.2 on the TX-NR6100?

None: the A4.2 is 6 Ω, and the TX-NR6100 needs no change for it.

Is the TX-NR6100 powerful enough for the A4.2?

Comfortable. From a seat 2 m away, loud 95 dB movie peaks take about 41 W per speaker, and the TX-NR6100 is rated 100 W per channel. Cinema reference level, 105 dB peaks, takes about 401 W.

Does the ELAC A4.2 work with the Onkyo TX-NR6100?

Verdict

Yes

The A4.2 is 6 Ω, and the TX-NR6100 is rated for speakers down to 4 Ω, so it drives them as is.

Speaker load

6 Ω speaker, rated down to 4 Ω

Power

100 W

Comfortable. About 41 W gives 95 dB peaks at 2 m

Height decoding

Yes

Dolby Atmos and DTS:X

How to connect them

Connect the A4.2 speakers to the TX-NR6100's height terminals with speaker wire.
Run AccuEQ with its microphone at your seat.

Plan the A4.2 and TX-NR6100 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

ELAC A4.2

Impedance: 6 Ω
Sensitivity: 85 dB (2.83 V, 1 m)
Recommended amplifier power: 20–80 W
MSRP: $399 a pair (MSRP, September 2026)

All A4.2 specs and pairings

Onkyo TX-NR6100

Amplifier channels: 7
Height formats: Dolby Atmos, DTS:X
Lowest speaker impedance: 4 Ω
MSRP: $799 each (MSRP, May 2025)

All TX-NR6100 specs and pairings

Questions about the A4.2 and TX-NR6100

Does the A4.2 work with the TX-NR6100?: Yes. The A4.2 is 6 Ω, and the TX-NR6100 is rated for speakers down to 4 Ω, so it drives them as is.
Will the TX-NR6100 damage the A4.2?: No. The TX-NR6100 is rated for the A4.2's 6 Ω load as it comes.
What impedance setting should I use for the A4.2 on the TX-NR6100?: None: the A4.2 is 6 Ω, and the TX-NR6100 needs no change for it.
Is the TX-NR6100 powerful enough for the A4.2?: Comfortable. From a seat 2 m away, loud 95 dB movie peaks take about 41 W per speaker, and the TX-NR6100 is rated 100 W per channel. Cinema reference level, 105 dB peaks, takes about 401 W.

Swap one of them

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.