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Onkyo TX-SR3100 5.2 channel AV receiver, 8K review

A 5.2 receiver with an 8K-capable HDMI board — the board is what dates a receiver, and this one is specified for a resolution beyond what most systems will use.

In brief

The accessible receiver with a modern board — right for a 5.1 system that will stay 5.1, and the wrong starting point if height channels are the plan. Key figures: 5.2 channels · 8K HDMI · Bluetooth · DAB tuner. It is a European model with no Amazon.com offer on October 25, 2026. Our score: 7.8/10, specification-checked.

What the board buys

An 8K-capable HDMI section. The content does not exist in any quantity, and the specification is a useful proxy: a board built for that bandwidth generally handles 4K at 120 Hz with variable refresh rate, which is the thing a console actually needs.

Why the channel count is the real decision

5.2 drives five speakers. A 5.1 system fits; a 5.1.2 with height channels does not, because that needs seven amplifiers. If height is ever part of the plan, this receiver is the wrong starting point — and if it is not, the two spare channels on a 7.2 are money unspent.

What is not stated

Room correction. It is the feature that changes a real living room most, and the listing does not say which system, if any, is included. Worth confirming in the full specification.

The tuner

DAB, which turns the receiver into a household radio. Minor, and the kind of thing that gets used far more than the surround processing.

Setting expectations

This is the entry to a real receiver: proper amplification, real speaker terminals, room to place speakers where they belong. That step matters more than anything on the specification sheet above it.

Buying it in the United States

Not sold on Amazon.com when we checked on October 25, 2026. This is a model of the European catalog: we hold Amazon references for it in Europe only, so the button can only run a search on Amazon.com. Read it as a description of the design, and buy from the list below.

  • DAB radio. The DAB/DAB+ tuner listed here has no broadcast to receive in the United States, which uses FM and HD Radio; count that feature out.

On this shelf, with an Amazon.com offer on October 25, 2026:

In its favor, and against it

Strengths

  • An 8K-capable HDMI board, which is the part of a receiver that ages first
  • Five channels and two subwoofer outputs — enough for a full 5.1 with a second subwoofer
  • The most accessible entry into a proper receiver in this catalog

Compromises

  • Five channels leaves no spare for height speakers without replacing the receiver
  • 8K passthrough is a specification most households will never use
  • Room correction is not stated in this listing

Specifications

Channels5.2 — stated
HDMI8K capable — stated
WirelessBluetooth — stated
TunerDAB — stated
Room correctionNot stated in this listing
Amazon referenceB0DK1CV5KJ
EAN4573211155600

What gets asked most

Is 8K passthrough worth anything?

Not for content — there is very little. What the board being specified for 8K usually indicates is that it also handles 4K at 120 Hz with the gaming features, and that is genuinely useful. The headline figure is a proxy for the useful one.

Will 5.2 limit me later?

If you later want height channels, yes: a 5.2 receiver drives five speakers, and a 5.1.2 layout needs seven. That is the specific upgrade this receiver cannot follow you into, and it is worth knowing at purchase rather than discovering.

Our score

7.8/ 10

The accessible receiver with a modern board — right for a 5.1 system that will stay 5.1, and the wrong starting point if height channels are the plan.

Who should pick this one, among AV receivers

A first 5.1 system where the budget matters and the HDMI board should not be the reason to replace it in three years.

Sources

Specifications: the manufacturer sheet and the matching Amazon product page. Prices and availability: Keepa. Every figure on this page names its source.

The method applied to these AV receivers

Prices quoted in these summaries are dated readings. The live price is shown next to each product.