You want to upgrade your TV’s sound without spending a fortune. A soundbar with a subwoofer can transform movie nights and music sessions, bringing depth and clarity to every scene. But with so many options under $300, finding the right one can feel overwhelming. In this guide, we compare the two best soundbars with subwoofer under $300 for 2026, focusing on features that matter most: bass performance, connectivity, and ease of use. Whether you need a compact setup for a bedroom or a full 5.1-channel system with Dolby Atmos, we have you covered. For a broader look at options, visit our Soundbars category page.

Buying Guide: What to Look for in a Soundbar with Subwoofer Under $300

Sound Quality and Bass Performance

Deep, punchy bass is the main reason to add a subwoofer. Look for a wired subwoofer for reliable low-frequency response, as wireless models can sometimes introduce latency. The Assistrust Sound Bar with Subwoofer offers a 110W boost and a dedicated sub that turns flat sound into stereo depth. The ULTIMEA 5.1CH system, on the other hand, uses an 18 mm high-excursion driver in a wooden cabinet for tighter, more controlled bass. Both deliver room-filling sound without distortion.

Connectivity Options

Your TV and soundbar need to communicate seamlessly. HDMI eARC is the gold standard for lossless Dolby Atmos, but optical and AUX inputs work well for older TVs. The ULTIMEA model supports HDMI eARC and Bluetooth 5.4 for stable streaming, while the Assistrust relies on ARC (not eARC) but includes Bluetooth 5.3. If you prioritize future-proof connectivity, the ULTIMEA is a solid choice. For more on connectivity and value, check out our best soundbars under $400.

Room Size and Placement

Where you place the soundbar affects how it sounds. The Assistrust offers four placement modes: standing tabletop, wall mount, horizontal tabletop, and wall mount again, each tuned for different room layouts. The ULTIMEA is a single-bar design that creates a wide soundstage without rear speakers, making it ideal for medium to large living rooms. Measure your space and choose accordingly.

EQ Modes and Customization

Having preset EQ modes saves you from manual adjustments. The Assistrust includes Movie, Music, and News modes, all balanced to avoid excessive treble or bass. The ULTIMEA goes further with the Ultimea app, offering a 10-band graphic EQ, 121 sound presets, and 13 surround levels. If you love tweaking audio, the ULTIMEA is more customizable. For a deep dive into adjustable sound, read our Top Value Soundbars with Dolby Atmos guide.

Final Thoughts

Choosing between these two top soundbars depends on your priorities. If you want a budget-friendly, versatile setup with easy EQ presets and multiple placement options, the Assistrust Sound Bar with Subwoofer delivers impressive bass and clear dialogue for daily streaming. For a more immersive home theater experience with genuine Dolby Atmos and advanced app control, the ULTIMEA 5.1CH Surround Sound Bar System with Dolby offers powerful surround sound and deeper customization, perfect for movie lovers and gamers alike.

Frequently Asked Questions

Can I use a soundbar with subwoofer for music?
Absolutely. Both models handle music well. The Assistrust has a dedicated Music EQ mode that enriches melodies and vocals, while the ULTIMEA’s app lets you fine-tune frequencies for any genre.

Do I need a separate subwoofer if the soundbar has built-in bass?
Built-in bass drivers can’t match the depth of a dedicated subwoofer. Both reviewed models include wired subwoofers that deliver deep, room-rattling lows for a more immersive experience.

How do I connect a soundbar to my TV?
Use HDMI eARC for the best audio quality with Dolby Atmos, or optical if your TV is older. The Assistrust works with ARC, optical, and AUX, while the ULTIMEA supports HDMI eARC. Always use the dedicated ARC port on your TV. For more connection tips, see our ULTIMEA poseidon M60 review.

What is the difference between ARC and eARC?
eARC (enhanced Audio Return Channel) supports higher bandwidth for lossless audio formats like Dolby Atmos TrueHD, while standard ARC is limited to compressed formats. If you want the best sound quality, choose a soundbar with eARC.