Will the TX-NR6100 damage the Signature Elite ES20?

No. The TX-NR6100 is rated for the Signature Elite ES20's 8 Ω load as it comes.

What impedance setting should I use for the Signature Elite ES20 on the TX-NR6100?

None: the Signature Elite ES20 is 8 Ω, and the TX-NR6100 needs no change for it.

Is the TX-NR6100 powerful enough for the Signature Elite ES20?

More than you need. From a seat 2 m away, loud 95 dB movie peaks take about 21 W per speaker, and the TX-NR6100 is rated 100 W per channel. Cinema reference level, 105 dB peaks, takes about 201 W.

Does the Polk Signature Elite ES20 work with the Onkyo TX-NR6100?

Verdict

Yes

The Signature Elite ES20 is 8 Ω, and the TX-NR6100 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

100 W

More than you need. About 21 W gives 95 dB peaks at 2 m

How to connect them

Connect the Signature Elite ES20 speakers to the TX-NR6100's front terminals with speaker wire.
Run AccuEQ with its microphone at your seat.

Plan the Signature Elite ES20 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

Polk Signature Elite ES20

Impedance: 8 Ω
Sensitivity: 88 dB
Recommended amplifier power: 20–150 W
MSRP: $399 a pair (MSRP, September 2026)

All Signature Elite ES20 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 Signature Elite ES20 and TX-NR6100

Does the Signature Elite ES20 work with the TX-NR6100?: Yes. The Signature Elite ES20 is 8 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 Signature Elite ES20?: No. The TX-NR6100 is rated for the Signature Elite ES20's 8 Ω load as it comes.
What impedance setting should I use for the Signature Elite ES20 on the TX-NR6100?: None: the Signature Elite ES20 is 8 Ω, and the TX-NR6100 needs no change for it.
Is the TX-NR6100 powerful enough for the Signature Elite ES20?: More than you need. From a seat 2 m away, loud 95 dB movie peaks take about 21 W per speaker, and the TX-NR6100 is rated 100 W per channel. Cinema reference level, 105 dB peaks, takes about 201 W.

Swap one of them

ELAC A4.2 + Onkyo TX-NR6100Works
ELAC DB53 + Onkyo TX-NR6100Works

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.