Short answer: the Adam Audio T5V. It ranks #8 of 24 powered bookshelf speakers at $239.99; the KEF LSX II LT ranks #17 and costs $449.99, so there is not much of a tradeoff to weigh.
On the Adam Audio T5V side: Better than the HS5 in terms of vocals detail and better low end. Set against that: Elevated, slightly uneven top end from the AMT tweeter, shared with Adam’s other T-series monitors - the rear treble trim only tilts.
The case for the KEF LSX II LT: Coaxial (Uni-Q-style) driver keeps the tweeter centered in the midrange. The tradeoff: Small drivers mean it’s SPL-limited: bass compression kicks in around 88-92dB/1m per speaker.
Buy the Adam Audio T5V if the ranking matters more than the price. Buy the KEF LSX II LT if the price matters more than the ranking.
Specifications Side By Side
| Adam Audio T5V | KEF LSX II LT | |
|---|---|---|
| Price | $239.99 | $449.99 |
| Ranked | #8 of 24 in Medium Size Powered Bookshelf Speakers | #17 of 24 in Medium Size Powered Bookshelf Speakers |
| Dimensions | 11.7"H x 7.0"W x 11.7"D (297.2 x 177.8 x 297.2 mm) | 9.5"H x 6.1"W x 7.1"D (241.3 x 154.9 x 180.3 mm) |
| Frequency Response | 58Hz - 24kHz (-3dB) (Manufacturer specified) | - |
| Inputs | XLR, RCA | Wifi, USB-C, HDMI, Optical, Bluetooth |
| Weight | 12.6 lbs / 5.7 kg each | 15 lbs / 6.8 kg |
| Drivers | 5" (127mm) woofer | 115mm (4.5in.) magnesium/aluminium alloy cone woofer, 19mm (0.75in.) aluminium dome tweeter |
| App | No | No |
| Bluetooth | No | No |
| EQ | Yes (Room adjustment) | No |
| Output Power | 70w Per Speaker | 100w RMS Per Speaker |
| Outputs | - | RCA Subwoofer |
The Two Speakers In Full
Adam Audio T5V: $239.99 Amazon
Pros: Better than the HS5 in terms of vocals detail and better low end.
Cons: Elevated, slightly uneven top end from the AMT tweeter, shared with Adam’s other T-series monitors - the rear treble trim only tilts the response rather than flattening it. Distortion, while better controlled than most speakers in this price range, isn’t reference quality.
| App | No |
|---|---|
| Bluetooth | No |
| Dimensions | 11.7"H x 7.0"W x 11.7"D (297.2 x 177.8 x 297.2 mm) |
| Drivers | 5" (127mm) woofer |
| EQ | Yes (Room adjustment) |
| Frequency Response | 58Hz - 24kHz (-3dB) (Manufacturer specified) |
| Inputs | XLR, RCA |
| Output Power | 70w Per Speaker |
| Weight | 12.6 lbs / 5.7 kg each |
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- Head-to-Head Comparisons
- Links
KEF LSX II LT: $449.99 Amazon
Pros: Coaxial (Uni-Q-style) driver keeps the tweeter centered in the midrange, giving wide and consistent dispersion both horizontally and vertically (about ±60° each) - a wide sweet spot for multiple seats or positions. The KEF Connect app provides genuinely useful DSP control: desk/wall boundary compensation, adjustable bass contour (standard/less/extra), treble trim, and subwoofer integration, letting you tune the sound to wherever it’s placed. Distortion at a moderate 86dB looks good for the speaker’s compact size. Tonal profile stays consistent from 0° to 30° off-axis, so side-seat listeners hear essentially the same balance as someone centered. Extensive connectivity for its size: HDMI, USB, optical, sub output, plus Wi-Fi/Bluetooth. Clearly outperformed the reviewer’s soundbars, including ones bundled with their own subwoofers, as a TV audio replacement.
Cons: Small drivers mean it’s SPL-limited: bass compression kicks in around 88-92dB/1m per speaker, and multitone distortion crosses the reviewer’s 3% threshold around 96dB - not intended for loud or large-room duty. F3 of 55Hz and F10 of 46Hz mean it loses much of its bass by around 50Hz; a subwoofer (controllable through the same app) is needed for real low end. Diffraction dips appear around 4-5kHz and again near 8kHz, likely tied to the tweeter housing or surround, giving a mild reduction in treble attack and sibilance. A possible port or enclosure resonance shows up around 800Hz in the rear-radiation measurements, though the reviewer wasn’t certain of the exact cause or whether it’s audible. No analog input on this LT variant, so a turntable can’t be connected directly - only the pricier standard LSX II model includes one.
| App | No |
|---|---|
| Bluetooth | No |
| Dimensions | 9.5"H x 6.1"W x 7.1"D (241.3 x 154.9 x 180.3 mm) |
| Drivers | 115mm (4.5in.) magnesium/aluminium alloy cone woofer, 19mm (0.75in.) aluminium dome tweeter |
| EQ | No |
| Inputs | Wifi, USB-C, HDMI, Optical, Bluetooth |
| Output Power | 100w RMS Per Speaker |
| Outputs | RCA Subwoofer |
| Weight | 15 lbs / 6.8 kg |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Links
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Product prices and availability were last checked August 9, 2026 at 6:57 AM UTC and are subject to change; the price and availability shown on Amazon at the time of purchase will apply to the purchase of this product.