Does the AVR-S670H support 5.1?

Yes, on its own amplifier channels. Its 5 built-in amplifier channels cover all 5 5.1 needs.

How many speakers do I need for 5.1?

5.1 uses 5 speakers and a subwoofer.

Do I need an external amplifier for 5.1 on the AVR-S670H?

No — its 5 built-in amplifier channels cover all 5 5.1 needs.

Can the Denon AVR-S670H run 5.1?

Verdict

Yes

Its 5 amplifier channels cover all 5 speakers 5.1 uses.

Speakers

5 floor, plus a sub

Amp channels

One for every speaker

Processing

Decodes all 5

5 floorSubwoofer

What 5.1 takes

5 floor speakers: front left and right, a center and two surrounds
A subwoofer

Denon AVR-S670H has no speaker pre-outs, and 2 subwoofer outputs.

Plan 5.1 with the AVR-S670H in your own room.

Draw your room in 3D, place the speakers where they go, and see every connection checked and how it sounds at your seat. Designing is free.

Build it in your room

Other layouts on the AVR-S670H

The AVR-S670H powers 5 speakers and processes 5. In a layout like 7.1.4, the 7 is floor speakers, the 1 a subwoofer and the 4 height speakers.

Questions about the AVR-S670H and 5.1

Does the AVR-S670H support 5.1?: Yes, on its own amplifier channels. Its 5 built-in amplifier channels cover all 5 5.1 needs.
How many speakers do I need for 5.1?: 5.1 uses 5 speakers and a subwoofer.
Do I need an external amplifier for 5.1 on the AVR-S670H?: No — its 5 built-in amplifier channels cover all 5 5.1 needs.

References for the AVR-S670H

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

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