Will the AVR-S670H damage the CDT-5650-C II?

No. Without Dolby Atmos or DTS:X decoding, the AVR-S670H simply has no height channel to send to the CDT-5650-C II.

What impedance setting should I use for the CDT-5650-C II on the AVR-S670H?

None: the CDT-5650-C II is 8 Ω, and the AVR-S670H needs no change for it.

Is the AVR-S670H powerful enough for the CDT-5650-C II?

More than you need. From a seat 2 m away, loud 95 dB movie peaks take about 6 W per speaker, and the AVR-S670H is rated 75 W per channel. Cinema reference level, 105 dB peaks, takes about 51 W.

Does the Klipsch CDT-5650-C II 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

75 W

More than you need. About 6 W gives 95 dB peaks at 2 m

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 CDT-5650-C II.

Plan the CDT-5650-C II 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 CDT-5650-C II

Impedance: 8 Ω
Sensitivity: 94 dB (2.83 V, 1 m)
MSRP: $125 each (MSRP, September 2026)

All CDT-5650-C II 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 CDT-5650-C II and AVR-S670H

Does the CDT-5650-C II 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 CDT-5650-C II?: No. Without Dolby Atmos or DTS:X decoding, the AVR-S670H simply has no height channel to send to the CDT-5650-C II.
What impedance setting should I use for the CDT-5650-C II on the AVR-S670H?: None: the CDT-5650-C II is 8 Ω, and the AVR-S670H needs no change for it.
Is the AVR-S670H powerful enough for the CDT-5650-C II?: More than you need. From a seat 2 m away, loud 95 dB movie peaks take about 6 W per speaker, and the AVR-S670H is rated 75 W per channel. Cinema reference level, 105 dB peaks, takes about 51 W.

Swap one of them

Klipsch CDT-5650-C II + Denon AVR-X1700HWorks
Klipsch CDT-5650-C II + Monoprice M7100XWorks
Klipsch CDT-3650-C II + Denon AVR-S670HNot recommended
JBL Stage 240B + Denon AVR-S670HWorks

References

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

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