Will the RX500A damage the Monitor XT15?

No. The RX500A is rated for the Monitor XT15's 8 Ω load as it comes.

What impedance setting should I use for the Monitor XT15 on the RX500A?

None: the Monitor XT15 is 8 Ω, and the RX500A needs no change for it.

Is the RX500A powerful enough for the Monitor XT15?

Comfortable. From a seat 2 m away, loud 95 dB movie peaks take about 32 W per speaker, and the RX500A is rated 70 W per channel. Cinema reference level, 105 dB peaks, takes about 318 W.

Does the Polk Monitor XT15 work with the Yamaha RX500A?

Verdict

Yes

The Monitor XT15 is 8 Ω, and the RX500A 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

70 W

Comfortable. About 32 W gives 95 dB peaks at 2 m

How to connect them

Connect the Monitor XT15 speakers to the RX500A's front terminals with speaker wire.
Run Room Correction with its microphone at your seat.

Plan the Monitor XT15 and RX500A 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 Monitor XT15

Impedance: 8 Ω
Sensitivity: 86 dB
Recommended amplifier power: 30–150 W
MSRP: $179 a pair (MSRP, September 2026)

All Monitor XT15 specs and pairings

Yamaha RX500A

Amplifier channels: 7
Height formats: Dolby Atmos, DTS:X
Lowest speaker impedance: 4 Ω
MSRP: $600 each (MSRP, May 2026)

All RX500A specs and pairings

Questions about the Monitor XT15 and RX500A

Does the Monitor XT15 work with the RX500A?: Yes. The Monitor XT15 is 8 Ω, and the RX500A is rated for speakers down to 4 Ω, so it drives them as is.
Will the RX500A damage the Monitor XT15?: No. The RX500A is rated for the Monitor XT15's 8 Ω load as it comes.
What impedance setting should I use for the Monitor XT15 on the RX500A?: None: the Monitor XT15 is 8 Ω, and the RX500A needs no change for it.
Is the RX500A powerful enough for the Monitor XT15?: Comfortable. From a seat 2 m away, loud 95 dB movie peaks take about 32 W per speaker, and the RX500A is rated 70 W per channel. Cinema reference level, 105 dB peaks, takes about 318 W.

Swap one of them

Polk Monitor XT15 + Denon AVR-S670HWorks
Polk Monitor XT15 + Denon AVR-X1700HWorks
Polk Monitor XT30 + Yamaha RX500AWorks
Polk RC60i + Yamaha RX500AWorks

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.