Will the AVR-S670H damage the SP-FS52?

No. The AVR-S670H is rated for the SP-FS52's 6 Ω load as it comes.

What impedance setting should I use for the SP-FS52 on the AVR-S670H?

None: the SP-FS52 is 6 Ω, and the AVR-S670H needs no change for it.

Is the AVR-S670H powerful enough for the SP-FS52?

Comfortable. From a seat 2 m away, loud 95 dB movie peaks take about 26 W per speaker, and the AVR-S670H is rated 75 W per channel. Cinema reference level, 105 dB peaks, takes about 253 W.

Does the Pioneer SP-FS52 work with the Denon AVR-S670H?

Verdict

Yes

The SP-FS52 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 26 W gives 95 dB peaks at 2 m

How to connect them

Connect the SP-FS52 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 SP-FS52 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

Pioneer SP-FS52

Impedance: 6 Ω
Sensitivity: 87 dB (2.83 V, 1 m)
MSRP: $130 each (MSRP, September 2026)

All SP-FS52 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 SP-FS52 and AVR-S670H

Does the SP-FS52 work with the AVR-S670H?: Yes. The SP-FS52 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 SP-FS52?: No. The AVR-S670H is rated for the SP-FS52's 6 Ω load as it comes.
What impedance setting should I use for the SP-FS52 on the AVR-S670H?: None: the SP-FS52 is 6 Ω, and the AVR-S670H needs no change for it.
Is the AVR-S670H powerful enough for the SP-FS52?: Comfortable. From a seat 2 m away, loud 95 dB movie peaks take about 26 W per speaker, and the AVR-S670H is rated 75 W per channel. Cinema reference level, 105 dB peaks, takes about 253 W.

Swap one of them

Pioneer SP-FS52 + Denon AVR-X1700HWorks
Pioneer SP-FS52 + Monoprice M7100XWorks
Klipsch CDT-3650-C II + Denon AVR-S670HNot recommended
Klipsch CDT-5650-C II + Denon AVR-S670HNot recommended

References

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

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