Will the AVR-S670H damage the Alpha 8in Carbon Fiber 2-way?

No. Without Dolby Atmos or DTS:X decoding, the AVR-S670H simply has no height channel to send to the Alpha 8in Carbon Fiber 2-way.

What impedance setting should I use for the Alpha 8in Carbon Fiber 2-way on the AVR-S670H?

None: the Alpha 8in Carbon Fiber 2-way is 8 Ω, and the AVR-S670H needs no change for it.

Is the AVR-S670H powerful enough for the Alpha 8in Carbon Fiber 2-way?

More than you need. From a seat 2 m away, loud 95 dB movie peaks take about 13 W per speaker, and the AVR-S670H is rated 75 W per channel. Cinema reference level, 105 dB peaks, takes about 127 W.

Does the Monoprice Alpha 8in Carbon Fiber 2-way 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 13 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 Alpha 8in Carbon Fiber 2-way.

Plan the Alpha 8in Carbon Fiber 2-way 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

Monoprice Alpha 8in Carbon Fiber 2-way

Impedance: 8 Ω
Sensitivity: 90 dB (2.83 V, 1 m)
MSRP: $200 a pair (MSRP, September 2026)

All Alpha 8in Carbon Fiber 2-way 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 Alpha 8in Carbon Fiber 2-way and AVR-S670H

Does the Alpha 8in Carbon Fiber 2-way 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 Alpha 8in Carbon Fiber 2-way?: No. Without Dolby Atmos or DTS:X decoding, the AVR-S670H simply has no height channel to send to the Alpha 8in Carbon Fiber 2-way.
What impedance setting should I use for the Alpha 8in Carbon Fiber 2-way on the AVR-S670H?: None: the Alpha 8in Carbon Fiber 2-way is 8 Ω, and the AVR-S670H needs no change for it.
Is the AVR-S670H powerful enough for the Alpha 8in Carbon Fiber 2-way?: More than you need. From a seat 2 m away, loud 95 dB movie peaks take about 13 W per speaker, and the AVR-S670H is rated 75 W per channel. Cinema reference level, 105 dB peaks, takes about 127 W.

Swap one of them

References

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

Brand names are trademarks of their owners. Not affiliated with or endorsed by any manufacturer. 3D models are our approximations. Prices are manufacturer list prices (MSRP) as of the month shown. How we earn from buy links: affiliate disclosure.