Samsung is clearing out its 2025 soundbar lineup during Prime Day, and the HW-B400F has landed at a price that undercuts Amazon’s own audio hardware. It’s sitting at $79, knocked down from $139, an all-time low by a significant margin for this 2.0ch soundbar with built-in subwoofer, 40W output, HDMI connectivity, Surround Sound Expansion, and Voice Enhance mode. No Prime membership required.
A built-in subwoofer at a price that usually gets you neither
Most soundbars under $100 offer a single speaker bar with no bass driver, which produces thin, flat audio that’s marginally better than a TV’s built-in speakers but not by enough to justify the purchase. The Samsung HW-B400F includes a built-in subwoofer in the same unit, which means the bass is handled by a dedicated driver rather than the main speaker trying to reproduce low frequencies it’s not designed for. The result is balanced sound with actual low-end presence at a price point where that combination almost never exists.
Voice Enhance mode automatically amplifies dialogue so conversations and narration stay clear over music beds and effects, which is the feature most people actually want from a soundbar when they’re watching TV and missing what characters are saying. Night mode lowers the volume and minimizes bass for late-night viewing without waking everyone else in the house, which is a practical detail that cheaper soundbars in this range consistently skip.
Surround Sound Expansion projects audio in multiple directions to fill the room rather than pointing sound directly forward from a single bar. HDMI and Bluetooth connectivity cover both wired and wireless setups, and Samsung’s One Remote Control integration means a single Samsung TV remote controls the soundbar’s power, volume, and sound modes without needing a second remote or the soundbar’s own controller. Setup involves no cable clutter beyond the HDMI connection: pair it and play.
Cheaper than Amazon’s own audio hardware, no membership needed
Amazon’s Echo Studio sits at $199. The Echo fourth-generation runs $59 but delivers a single smart speaker rather than a dedicated TV soundbar with a subwoofer and HDMI output. At $79 for a 2025 Samsung soundbar with a built-in bass driver and full TV integration, the HW-B400F undercuts Amazon’s own audio lineup on value per dollar for the specific use case of improving TV audio, and it does it without requiring a Prime membership or a smart home ecosystem to function.
The 40W output is sufficient for standard living room and bedroom use, and the 2025 model includes Samsung’s current generation of audio processing for surround expansion and voice clarity. For a first soundbar purchase, a secondary TV setup, or a bedroom upgrade, the HW-B400F at $79 delivers more than any competing option in this price range has historically offered.
A 2025 Samsung soundbar with a built-in subwoofer at an all-time low that beats Amazon’s own audio hardware on price is a combination that didn’t exist before this Prime Day deal. At $79 with no membership required, the window to grab it at this price is open to everyone and won’t last past the end of Prime Day.