Will the VSX-LX505 damage the RP-8000F II?

No. The VSX-LX505 is rated for the RP-8000F II's 8 Ω load as it comes.

What impedance setting should I use for the RP-8000F II on the VSX-LX505?

None: the RP-8000F II is 8 Ω, and the VSX-LX505 needs no change for it.

Is the VSX-LX505 powerful enough for the RP-8000F II?

More than you need. From a seat 2 m away, loud 95 dB movie peaks take about 3 W per speaker, and the VSX-LX505 is rated 120 W per channel. Cinema reference level, 105 dB peaks, takes about 21 W.

Does the Klipsch RP-8000F II work with the Pioneer VSX-LX505?

Verdict

Yes

The RP-8000F II is 8 Ω, and the VSX-LX505 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

120 W

More than you need. About 3 W gives 95 dB peaks at 2 m

How to connect them

Connect the RP-8000F II speakers to the VSX-LX505's front terminals with speaker wire.
Run Advanced MCACC with its microphone at your seat.

Plan the RP-8000F II and VSX-LX505 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

Klipsch RP-8000F II

Impedance: 8 Ω
Sensitivity: 98 dB (2.83 V, 1 m) in-room
MSRP: $800 each (MSRP, September 2026)

All RP-8000F II specs and pairings

Pioneer VSX-LX505

Amplifier channels: 9
Height formats: Dolby Atmos, DTS:X
Lowest speaker impedance: 4 Ω
MSRP: $1,399 each (MSRP, February 2025)

All VSX-LX505 specs and pairings

Questions about the RP-8000F II and VSX-LX505

Does the RP-8000F II work with the VSX-LX505?: Yes. The RP-8000F II is 8 Ω, and the VSX-LX505 is rated for speakers down to 4 Ω, so it drives them as is.
Will the VSX-LX505 damage the RP-8000F II?: No. The VSX-LX505 is rated for the RP-8000F II's 8 Ω load as it comes.
What impedance setting should I use for the RP-8000F II on the VSX-LX505?: None: the RP-8000F II is 8 Ω, and the VSX-LX505 needs no change for it.
Is the VSX-LX505 powerful enough for the RP-8000F II?: More than you need. From a seat 2 m away, loud 95 dB movie peaks take about 3 W per speaker, and the VSX-LX505 is rated 120 W per channel. Cinema reference level, 105 dB peaks, takes about 21 W.

Swap one of them

References

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

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