Will the AVR-S670H damage the R-40SA?

No. Without Dolby Atmos or DTS:X decoding, the AVR-S670H simply has no height channel to send to the R-40SA.

What impedance setting should I use for the R-40SA on the AVR-S670H?

None: the R-40SA is 8 Ω, and the AVR-S670H needs no change for it.

How many watts does the R-40SA need?

Klipsch doesn't publish the R-40SA's sensitivity or impedance, so we can't work out a wattage for it. Compare the AVR-S670H's power rating with Klipsch's recommendation.

Does the Klipsch R-40SA work with the Denon AVR-S670H?

Verdict

Not recommended

Denon AVR-S670H has no Dolby Atmos or DTS:X decoding for height speakers. Choose a receiver with Dolby Atmos.

Speaker load

8 Ω speaker, rated down to 4 Ω

Power

—

Sensitivity not published

Height decoding

No Dolby Atmos or DTS:X

What works instead

Choose a receiver with Dolby Atmos. These receivers near the AVR-S670H's price do work with the R-40SA.

Plan the R-40SA and AVR-S670H 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 R-40SA

Impedance: 8 Ω
MSRP: $675 a pair (MSRP, September 2026)

All R-40SA specs and pairings

Denon AVR-S670H

Amplifier channels: 5
Height formats: None
Lowest speaker impedance: 4 Ω
MSRP: $649 each (MSRP, September 2026)

All AVR-S670H specs and pairings

Questions about the R-40SA and AVR-S670H

Does the R-40SA work with the AVR-S670H?: Not recommended. Denon AVR-S670H has no Dolby Atmos or DTS:X decoding for height speakers. Choose a receiver with Dolby Atmos.
Will the AVR-S670H damage the R-40SA?: No. Without Dolby Atmos or DTS:X decoding, the AVR-S670H simply has no height channel to send to the R-40SA.
What impedance setting should I use for the R-40SA on the AVR-S670H?: None: the R-40SA is 8 Ω, and the AVR-S670H needs no change for it.
How many watts does the R-40SA need?: Klipsch doesn't publish the R-40SA's sensitivity or impedance, so we can't work out a wattage for it. Compare the AVR-S670H's power rating with Klipsch's recommendation.

Swap one of them

Klipsch R-40SA + Denon AVR-X1700HWorks
Klipsch R-40SA + Monoprice M7100XWorks
KEF Q1 Meta + Denon AVR-S670HNeeds a setting change
Klipsch RP-600M II + Denon AVR-S670HWorks

References

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

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