Will the AVR-S670H damage the SS-CS8?

No. The AVR-S670H is rated for the SS-CS8's 6 Ω load as it comes.

What impedance setting should I use for the SS-CS8 on the AVR-S670H?

None: the SS-CS8 is 6 Ω, and the AVR-S670H needs no change for it.

Is the AVR-S670H powerful enough for the SS-CS8?

Comfortable. From a seat 2 m away, loud 95 dB movie peaks take about 32 W per speaker, and the AVR-S670H is rated 75 W per channel. Cinema reference level, 105 dB peaks, takes about 318 W.

Does the Sony SS-CS8 work with the Denon AVR-S670H?

Verdict

Yes

The SS-CS8 is 6 Ω, and the AVR-S670H is rated for speakers down to 4 Ω, so it drives them as is.

Speaker load

6 Ω speaker, rated down to 4 Ω

Power

75 W

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

How to connect them

Connect the SS-CS8 speakers to the AVR-S670H's front terminals with speaker wire.
In the AVR-S670H's speaker setup, set speaker impedance to 6 Ω.
Run Audyssey MultEQ with its microphone at your seat.

Plan the SS-CS8 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

Sony SS-CS8

Impedance: 6 Ω
Sensitivity: 86 dB (2.83 V, 1 m)
MSRP: $169 each (MSRP, September 2014)

All SS-CS8 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 SS-CS8 and AVR-S670H

Does the SS-CS8 work with the AVR-S670H?: Yes. The SS-CS8 is 6 Ω, and the AVR-S670H is rated for speakers down to 4 Ω, so it drives them as is.
Will the AVR-S670H damage the SS-CS8?: No. The AVR-S670H is rated for the SS-CS8's 6 Ω load as it comes.
What impedance setting should I use for the SS-CS8 on the AVR-S670H?: None: the SS-CS8 is 6 Ω, and the AVR-S670H needs no change for it.
Is the AVR-S670H powerful enough for the SS-CS8?: Comfortable. From a seat 2 m away, loud 95 dB movie peaks take about 32 W per speaker, and the AVR-S670H is rated 75 W per channel. Cinema reference level, 105 dB peaks, takes about 318 W.

Swap one of them

Sony SS-CS8 + Denon AVR-X1700HWorks
Sony SS-CS8 + Monoprice M7100XWorks
Sony SS-CS5 + Denon AVR-S670HWorks
Polk Monitor XT15 + Denon AVR-S670HWorks

References

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

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