Short answer: the Monacor SOUND-4BT. It ranks #11 of 22 powered bookshelf speakers by sound quality at $310; the Kanto YU4 ranks #12 and costs $479.99, so there is not much of a tradeoff to weigh.
What the Kanto YU4 offers: Phono, optical and Bluetooth inputs, remote control and a subwoofer output make it convenient for a compact multi-source system. ASR’s measured horizontal coverage is broad enough for some freedom of seating position. The ideal-subwoofer preference score of 5.09 indicates that bass support would materially improve its usefulness. Watch for: Standalone preference is only 2.15, with a -3dB point around 86Hz and a 4.2dB midrange response span. Response irregularities remain even after bass extension is removed from the comparison, so a subwoofer alone will not make it neutral. Sensitivity measured at an arbitrary powered-speaker gain setting is not a reliable basis for judging efficiency or maximum volume.
What the Monacor SOUND-4BT offers: The available measurements suggest useful bass for its size, with a -3dB point around 61Hz, and a fairly small 2.8dB response span from 300Hz to 5kHz. Optical and analog inputs, Bluetooth, remote control and a subwoofer output make it versatile for a compact stereo setup. Watch for: Predicted in-room response remains uneven despite the modest midrange span. A subwoofer can add bass reach but does not correct the remaining tonal variations.
Buy the Monacor SOUND-4BT. It ranks higher for sound quality than the Kanto YU4 and costs less, which settles it without a real tradeoff to make.
Specifications Side By Side
| Kanto YU4 | Monacor SOUND-4BT | |
|---|---|---|
| Price | $479.99/pair | $310/pair |
| Ranked | #12 of 22 in Small Size Powered Bookshelf Speakers | #11 of 22 in Small Size Powered Bookshelf Speakers |
| Enclosure | Powered 2-way, rear-ported | 2-way powered stereo pair, bass reflex |
| Drivers | 1" silk-dome tweeter, 4" Kevlar woofer | 1" dome tweeter, 4" woofer |
| Frequency Response | 60Hz-20kHz | - |
| Power Output | 70W RMS / 140W peak per pair | 2 x 30W RMS |
| Inputs | Bluetooth, optical, RCA/phono, 3.5mm | Bluetooth 4.0 aptX, optical, RCA, 3.5mm; sub out |
| Bluetooth Codecs | SBC, aptX | SBC, aptX |
| Outputs | Subwoofer | - |
| Dimensions | 8.7H x 5.5W x 7.5D in | 8.5H x 5.5W x 6.7D in |
| Weight | 6.9 lbs powered / 5.5 lbs passive | 11.5 lbs/pair |
Related Speaker Comparisons
A few more comparisons worth a look in the same class:
- Adam Audio D3v vs Klipsch ProMedia Lumina
- Genelec 8010A vs Audioengine A2+
- Adam Audio D3v vs Audioengine A2+
- Monacor SOUND-4BT vs Audioengine A2+
- Genelec 8010A vs Klipsch ProMedia Lumina
Prices on this page were last checked September 8, 2026 at 6:02 PM UTC. Product prices and availability are accurate as of that date/time 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.
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The Two Speakers In Full
Kanto YU4: $479.99/pair Kanto eBay
Pros: Phono, optical and Bluetooth inputs, remote control and a subwoofer output make it convenient for a compact multi-source system. ASR’s measured horizontal coverage is broad enough for some freedom of seating position. The ideal-subwoofer preference score of 5.09 indicates that bass support would materially improve its usefulness.
Cons: Standalone preference is only 2.15, with a -3dB point around 86Hz and a 4.2dB midrange response span. Response irregularities remain even after bass extension is removed from the comparison, so a subwoofer alone will not make it neutral. Sensitivity measured at an arbitrary powered-speaker gain setting is not a reliable basis for judging efficiency or maximum volume.
Full Kanto YU4 review and specifications →
| Bluetooth Codecs | SBC, aptX |
|---|---|
| Dimensions | 8.7H x 5.5W x 7.5D in |
| Drivers | 1" silk-dome tweeter, 4" Kevlar woofer |
| Enclosure | Powered 2-way, rear-ported |
| Frequency Response | 60Hz-20kHz |
| Inputs | Bluetooth, optical, RCA/phono, 3.5mm |
| Outputs | Subwoofer |
| Power Output | 70W RMS / 140W peak per pair |
| Weight | 6.9 lbs powered / 5.5 lbs passive |
- Links
- Reviews, Comparisons and Sound Samples
Monacor SOUND-4BT: $310/pair LTT Versand eBay
Pros: The available measurements suggest useful bass for its size, with a -3dB point around 61Hz, and a fairly small 2.8dB response span from 300Hz to 5kHz. Optical and analog inputs, Bluetooth, remote control and a subwoofer output make it versatile for a compact stereo setup.
Cons: Predicted in-room response remains uneven despite the modest midrange span. A subwoofer can add bass reach but does not correct the remaining tonal variations.
Full Monacor SOUND-4BT review and specifications →
| Bluetooth Codecs | SBC, aptX |
|---|---|
| Dimensions | 8.5H x 5.5W x 6.7D in |
| Drivers | 1" dome tweeter, 4" woofer |
| Enclosure | 2-way powered stereo pair, bass reflex |
| Inputs | Bluetooth 4.0 aptX, optical, RCA, 3.5mm; sub out |
| Power Output | 2 x 30W RMS |
| Weight | 11.5 lbs/pair |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons