Will the AVR-S770H damage the A4.2?

No. The AVR-S770H 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 AVR-S770H?

None: the A4.2 is 6 Ω, and the AVR-S770H needs no change for it.

Is the AVR-S770H 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 AVR-S770H is rated 75 W per channel. Cinema reference level, 105 dB peaks, takes about 401 W.

Does the ELAC A4.2 work with the Denon AVR-S770H?

Verdict

Yes

The A4.2 is 6 Ω, and the AVR-S770H 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

75 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 AVR-S770H's height terminals with speaker wire.
In the AVR-S770H's speaker setup, set speaker impedance to 6 Ω.
Run Audyssey MultEQ with its microphone at your seat.

Plan the A4.2 and AVR-S770H 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

Denon AVR-S770H

Amplifier channels: 7
Height formats: Dolby Atmos, DTS:X
Lowest speaker impedance: 4 Ω
MSRP: $749 each (MSRP, September 2026)

All AVR-S770H specs and pairings

Questions about the A4.2 and AVR-S770H

Does the A4.2 work with the AVR-S770H?: Yes. The A4.2 is 6 Ω, and the AVR-S770H is rated for speakers down to 4 Ω, so it drives them as is.
Will the AVR-S770H damage the A4.2?: No. The AVR-S770H 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 AVR-S770H?: None: the A4.2 is 6 Ω, and the AVR-S770H needs no change for it.
Is the AVR-S770H 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 AVR-S770H is rated 75 W per channel. Cinema reference level, 105 dB peaks, takes about 401 W.

Swap one of them

ELAC A4.2 + Onkyo TX-NR6100Works
ELAC A4.2 + Yamaha RX-V6AWorks
Klipsch RP-500M II + Denon AVR-S770HWorks
Klipsch RP-600M II + Denon AVR-S770HWorks

References

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

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