Onkyo TX-SR3100 Review: A Budget-Friendly, Feature-Rich Receiver for Home Theater Enthusiasts That Transforms the Audio Experience

Onkyo TX-SR3100 Review

Sometimes, technology can be transformative. It doesn’t have to be transformative in a life-altering way; it can be subtle, a single experience that offers more richness, more, well, more.

In 1992, I bought a new television and a surround sound stereo system so the family could experience the release of Titanic on videotape. The system consisted of a 27-inch television and a JVC stereo. That JVC system has survived to this day. It became the backup sound system to my Polk Audio Command Sound Bar, its optical signal routed through a digital-to-analog converter.

My current 65-inch Samsung TV has an audio glitch that we attribute to the television, as it seems to lose its connection to other devices occasionally. All of a sudden, the sound would switch to the television speakers. It would no longer recognize the HDMI Arc connection to the soundbar, so we would switch to the stereo and its optical input. While this re-route worked, the television often forgot that interface as well.

Eventually, we would need to unplug the television and with that, reboot its connections. Weeks, even months, would go by without an issue. However, I’m not reviewing glitchy televisions in this post, although the phenomenon continues with the new stereo system, making the Samsung television the clear culprit in the missing sound issue.

That stereo ran backup for over fifteen years. It still works, though its analog technology is increasingly only useful for picking up FM radio stations.
Following a CES 2024 interaction, Onkyo sent me a TX-SR3100 for review. The receiver includes multiple HDMI inputs, as well as an optical input. It also supports Bluetooth® for streaming. Its intelligent surround sound listens to the room to optimize the audio experience.

The KLH speakers I purchased at the time of the Titanic release still work, though with the new configuration, the passive subwoofer has been retired in favor of a new Klipsch R-100SW 10″ active subwoofer that reverberates with new sonic aggression throughout our home. And BTW, if a single subwoofer isn’t enough, the TX-SR3100 will handle two.

While the Polk soundbar emulated a 3.1 speaker configuration, it did not hold an audio candle to the richness of the Onkyo surround that shakes our seats and startles us with the sound of glass breaking over our shoulders, nor did it fill the room with the sound of crowds, placing us in a much more realized version of our favorite sports.

Transformational is subjective. I think I built a model in this review that demonstrates how the features of the Onkyo TX-SR3100 transform the audio experience of home entertainment not just in a qualitative way but in a quantitative way as well.

What we like

Pros

• Affordable price point ($399)
• Supports Dolby Atmos and DTS:X
• 80 watts per channel into 8 ohms
• 4 HDMI 2.1 inputs with support for 8K 60 and 4K 120
• eARC and ARC support for enhanced audio return
• AccuEQ Room Calibration for easy setup
• Vocal Enhancer for improved dialogue clarity
• Dolby Atmos Height Virtualizer
• Bluetooth for basic wireless audio streaming
• Variable Refresh Rate (VRR) and Auto Low Latency Mode (ALLM) for gaming
• Dynamic HDR support (Dolby Vision, HDR10+)
• Two subwoofer pre-outs
• Compact design and easy to use

There is a lot to cover when looking at a home theater system receiver. This review will focus on the key pros and then offer a more detailed review of the experience.

Affordable price point ($399): At $399, the TX-SR3100 is competitively priced, offering a feature set typically found in more expensive models.

Compact design and easy to use: The TX-SR3100’s sleek and user-friendly design ensures that it fits well in most entertainment centers while remaining accessible for operation. Its straightforward interface makes it easy for users to navigate and adjust settings without frustration.

Supports Dolby Atmos and DTS:X: With support for advanced audio formats like Dolby Atmos and DTS:X, this receiver enables a more immersive sound experience. Users can enjoy multi-dimensional audio that elevates movie-watching and gaming, placing sound all around them for a more engaging experience.

80 watts per channel into 8 ohms: The 80 watts per channel output provides ample power for driving various speakers, ensuring clear and dynamic sound at reasonable volume levels. This performance is especially beneficial in mid-sized rooms where additional power can make a noticeable difference.

4 HDMI 2.1 inputs with support for 8K 60 and 4K 120: The inclusion of four HDMI 2.1 inputs, along with support for 8K60 and 4K120 video resolutions, ensures that the TX-SR3100 is future-proofed for the latest gaming consoles and 4K content. This versatility is vital for consumers who want to keep their systems up to date.

eARC and ARC support for enhanced audio return: The eARC (Enhanced Audio Return Channel) support allows users to send high-quality audio back to the receiver from their TV, which is particularly beneficial for streaming services that offer high-definition audio. This feature simplifies connections and enhances the overall audio experience.

AccuEQ Room Calibration for easy setup: The Onkyo TX-SR3100 AccuEQ Room Calibration system simplifies the setup process, allowing users to optimize their audio environment with minimal effort. Automatically adjusting speaker settings to match the room’s acoustics helps ensure balanced sound without extensive manual tweaking.

Vocal Enhancer for improved dialogue clarity: The Vocal Enhancer feature specifically boosts dialogue, making it clearer and easier to understand, especially during action-packed scenes where background noise often overshadows spoken words. This feature is a boon for movie watchers who value clarity in dialogue-heavy content.

Dolby Atmos Height Virtualizer: This innovative feature simulates height channels, creating a surround sound effect even without a full speaker setup. It allows users to experience a more immersive audio experience without investing in additional speakers, making it perfect for those with space constraints.

Bluetooth for basic wireless audio streaming: The inclusion of Bluetooth enables users to easily connect their smartphones or tablets for wireless audio playback. This added convenience allows for spontaneous listening sessions without the need for cumbersome wiring.

Variable Refresh Rate (VRR) and Auto Low Latency Mode (ALLM) for gaming: These gaming-centric features enhance the experience for gamers, reducing lag and providing smoother gameplay. They allow for a responsive and enjoyable gaming environment, making the TX-SR3100 a strong option for home entertainment setups focused on gaming.

Dynamic HDR support (Dolby Vision, HDR10+): With support for major HDR formats like Dolby Vision and HDR10+, the Onkyo TX-SR3100 ensures stunning picture quality with vibrant colors and exceptional contrast. This capability enriches the viewing experience, making it ideal for film enthusiasts who want the best visual quality.

Two subwoofer pre-outs: The dual subwoofer pre-outs allow users to connect two subwoofers, enhancing the bass response and overall sound experience in larger rooms. This feature adds flexibility for those looking to optimize their audio setup.

Going deep

The Onkyo TX-SR3100 offers an impressive balance of affordability and capability, positioning itself as a strong contender in the budget AV receiver market. It caters to the needs of home theater newcomers and experienced audiophiles seeking a feature-rich entry-level receiver. While it may not challenge high-end models, the SR3100 easily handles a wide range of modern audio-visual demands.

Design and Build

The Onkyo TX-SR3100 may appear a little overwhelming at first. There is a lot going on and many options to choose from, but the intuitive front panel offers clearly laid out controls, with easy access to input selectors, a large volume knob, and basic tonal adjustments. Though it might not win any awards for innovation in design, its somewhat retro vibe harkens back to the JVC unit it replaces. Weighing in at 18 pounds, it feels sturdy and well-built, and its compact dimensions make it ideal for most AV racks or shelves.

On the rear, the connectivity is adequate for most AV needs. The 3100 includes four HDMI 2.1 inputs, one supporting ARC/ eARC, including 4K 120 and 8K 60 content. The 4K and 8K support makes this receiver particularly appealing for gamers who require high refresh rates and low latency. The receiver also supports variable refresh rates (VRR) and auto-low latency mode (ALLM). Although it lacks an Ethernet port and built-in Wi-Fi, Bluetooth allows for basic wireless audio streaming. The lack of integrated streaming might disappoint some, but the omission prevents redundancy for those already using external streamers like their phone or an Apple TV.

Performance

The TX-SR3100 shines (or glows rather with its LED pane) for its price. Although the massive output of the 3100 was funneled through 26-year-old speakers, it delivered a solid, well-rounded experience across both configurations. Despite its price, the TX-SR3100 held up even when driving the more demanding Focal speakers, showcasing its ability to work across a range of speaker types and price points. However, the receiver’s class AB amplifier will inevitably fall short when pushed beyond certain volume levels, particularly with more power-hungry setups.

In terms of audio formats, support for Dolby Atmos and DTS defines this as a modern receiver. The Onkyo TX-SR3100 easily handles a 3.1.2 Atmos setup, although its ceiling caps at 5.2 channels, leaving out more elaborate configurations like 5.1.2 Atmos systems. This limitation is worth noting for those who plan to expand their home theater systems in the future. Still, the inclusion of the Dolby Atmos Height Virtualizer offers a decent alternative for simulating height effects without dedicated speakers, though the result is predictably less precise than a full speaker array.

Dialogue clarity can be enhanced by the Vocal Enhancer feature, which boosts the center channel output to ensure speech remains intelligible, especially in movies with complex sound mixes like anything Marvel. However, this feature can sometimes distort the overall soundstage if overused, making it best employed sparingly.

Room Calibration and Setup

The blaring white noise took me aback. I wasn’t expecting this level of set-up automation, nor that actual experience of being in the room during calibration. Setting up the TX-SR3100 is an easy process, thanks in part to the AccuEQ Room Calibration system. While not as sophisticated as more premium options like Dirac or Audyssey, AccuEQ provides good correction for most environments. The calibration process compensates for speaker placement and room acoustics, ensuring balanced sound without requiring excessive manual tweaking. It’s particularly useful for those new to home theater setups or those who only change their speaker system every quarter of a century or so.

Setting up the Onkyo TX-SR3100 was relatively easy, though the discovery of a passive subwoofer resulted in a multi-day installation as I waited for Amazon to deliver the new subwoofer. I ended up calibrating the system for the available speakers so we could watch television. Silly me, thinking I could just connect the massive new subwoofer and move on. Lights flickered, and the stereo let out a nearly audible moan as it attempted to recognize a subwoofer that wasn’t there before. I ended up restarting the setup and recalibrating the system. I have had no issues since I went through that painless troubleshooting effort.

The only other issue I encountered was getting the speaker wires connected. I would like to see the holes for inserting the wires more accessible. Once in, of course, they won’t be touched, but given the space and the configuration, my daughter and I had to do a little bendy-wendy to get the wires in and tightened down. This wiring accessibility is also noted below, under “What can be improved: Lacks advanced speaker binding posts.”

Music and Stereo Playback

Despite the common perception that AV receivers are inferior to dedicated Hi-Fi components for music playback, the Onkyo TX-SR3100 makes a strong case for itself. In stereo mode, it delivers a balanced, neutral sound profile that maintains clarity and detail across various genres. Compared to small-form amps or standalone DACs, the Onkyo holds its own, avoiding the harshness or overemphasized treble often heard in cheaper components. I plugged in a pair of OneOdio Monitor 80 headphones with its long cable to enjoy stereo music (and television) without bothering other people in the house.

OneOdio Monitor 80 Review: Profound Sound and Outstanding Value

Gaming and Video Capabilities

Gamers will appreciate the TX-SR3100’s HDMI 2.1 ports and support for 4K 120, offering smooth, low-latency visuals that are great for first-person shooters and other demanding games. Paired with a PlayStation 5 or Xbox Series X, the receiver should handle fast-paced action without noticeable lag. It also includes ALLM and VRR for fluid gaming experiences.

On the video side, support for HDR10+, Dolby Vision, and other dynamic HDR formats ensures the receiver can handle the latest high-quality content with ease. While it won’t rival a dedicated video processor, it gets the job done, making it a reliable backbone for modern home theaters.

What could be improved

Cons

• No Wi-Fi or Ethernet connectivity
• Lacks built-in streaming services
• No independent subwoofer level control
• Limited to 3.1.2 Dolby Atmos configuration
• No phono preamp for vinyl enthusiasts
• AccuEQ less advanced than Dirac or Audyssey
• Lacks advanced speaker binding posts
• Dialog Enhancer can affect overall tonality
• Packaging needs to be more sustainable

The Onkyo TX-SR3100, while packed with features for its price, does come with a few compromises.

No Wi-Fi or Ethernet connectivity: One of the more notable omissions is the lack of built-in Wi-Fi or Ethernet, which means there is no native network streaming. This is a missed opportunity, given that many modern receivers offer some form of streaming integration.

Lacks built-in streaming services: Without Wi-Fi or Ethernet, built-in streaming services like Spotify Connect, Tidal, or AirPlay are out of the question. This forces users to rely on external streamers, adding complexity and cost to an otherwise simple setup.

No independent subwoofer level control: The subwoofer pre-outs are parallel, meaning there’s no ability to control the level or delay independently for each subwoofer. This could be limiting for those who use dual subwoofers in different room placements and want finer control.

Limited to 3.1.2 Dolby Atmos configuration: While the Onkyo TX-SR3100 supports Dolby Atmos, it is capped at a 3.1.2 configuration, which might disappoint those aiming for a more immersive 5.1.2 or 7.1.2 setup. This limits its potential for larger or more advanced home theaters.

No phono preamp for vinyl enthusiasts: Vinyl lovers must invest in an external phono preamp or a turntable with one built-in. Any of the available inputs will handle an amped turntable.

AccuEQ less advanced than Dirac or Audyssey: The Onkyo TX-SR3100’s AccuEQ Room Calibration system does its job well, but it isn’t as advanced in room correction systems like Dirac or Audyssey, which offer more granular control over audio adjustments. Audiophiles seeking the best possible room correction might find AccuEQ somewhat limited, but non-audiophiles will be happy with the results, even if they are startled when it starts up…if they avoid reading manuals as I do.

Lacks advanced speaker binding posts: The binding posts on the TX-SR3100 are functional but basic. They don’t offer the higher-quality, banana-plug-friendly posts that you might expect on more expensive models, limiting connectivity options and overall build quality. This goes hand-in-hand with my comments about placing the wires. Although the banana plug requires extra work, it creates a robust installation.

Dialog Enhancer can affect overall tonality: The Vocal Enhancer feature is useful for boosting dialogue clarity, but it comes with a trade-off—using it can affect the overall sound balance, making other elements of the audio mix less natural. This feature should be used sparingly to avoid compromising the overall listening experience.

Sustainable packaging: Much progress has been made in sustainable packaging, but I would like to see Onkyo ditch Styrofoam and adopt a more organic material packaging design.

Despite these limitations, the Onkyo TX-SR3100 stands as a competitive option in its price range, offering more than enough for the average home theater enthusiast while leaving room for a few improvements.

Onkyo TX-SR3100: The bottom line

For $399, the Onkyo TX-SR3100 offers an enticing blend of features, including Dolby Atmos, HDMI 2.1 support, and a solid amplification system. Its limitations—such as the lack of Wi-Fi, phono preamp, and fully independent subwoofer controls—are forgivable at this price point. The receiver delivers a satisfying home theater experience without overwhelming the budget-conscious buyer.

Onkyo provided the TX-SR3100 for review. Images courtesy of Onkyo unless otherwise noted.

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