Short answer: the AsciLab F6Bs. It ranks #20 of 222 bookshelf speakers by sound quality (rated 4.5/5); the Mission LX-3 MKII ranks #138 (rated 3.6/5).
The AsciLab F6Bs is the more accurate pick. A slimmer, sealed, VESA 100 wall mountable variant of the AsciLab F6B, trading the AsciLab F6B’s passive radiator for a shallower 15.4cm deep cabinet that can go straight on a wall bracket. Its measured preference score, a predictor of how neutral it sounds, is 5.24 against 4.17 for the Mission LX-3 MKII. Watch for: AsciLab’s own site shows the F6Bs sold out, though it remains in stock through resellers like Audiophonics and Tested Audio.
The Mission LX-3 MKII is the deeper-bass pick. A large affordable standmount with a 6.5-inch woofer, 88dB rated sensitivity and useful bass. Its bass reaches about 67.4Hz before falling 3dB, against 82Hz for the AsciLab F6Bs. The tradeoff: On-axis smoothness of 0.217 and predicted in-room smoothness of 0.344 reveal clear response unevenness, with a -0.46dB-per-octave downward tilt.
Buy the AsciLab F6Bs. It is rated higher for sound quality than the Mission LX-3 MKII.
Still deciding? The full Passive Home rankings cover every ranked option.
Specifications Side By Side
| AsciLab F6Bs | Mission LX-3 MKII | |
|---|---|---|
| Price | €799 per pair | £249 per pair |
| Ranked | #20 of 222 in Large Size Bookshelf Speakers | #138 of 222 in Large Size Bookshelf Speakers |
| Enclosure | sealed | 2-way, bass-reflex |
| Drivers | 1” aluminum dome tweeter with waveguide and phase plug, 6” fiber cone woofer | 1” microfiber-dome tweeter, 6.5” composite-fiber woofer |
| Dimensions | 14.5”H x 8”W x 6.1”D (368 x 203 x 154 mm) | 13.6H x 8.9W x 12.1D in |
| Weight | 12.3 lbs (5.6 kg) each | 18.5 lbs (8.4 kg) each |
| Sensitivity | 85.2dB @ 2.83V/1m (measured, Audio Science Review) | 88dB |
| Impedance | 4 ohms nominal, 3.7 ohms minimum | 8 ohms nominal, 4.1 ohms minimum |
| Bass Extension (-3dB) | 82.0Hz (measured, Audio Science Review) | 67.4Hz (measured, ASR via spinorama.org) |
| Bass Extension (-10dB) | 50.1Hz (measured, Audio Science Review) | 42.5Hz (derived from ASR on-axis curve, spinorama.org) |
| Crossover Frequency | 1kHz | - |
| Mounting | VESA 100 wall mount compatible | - |
| Warranty | 2 years | - |
| Country | South Korea | United Kingdom (design) |
| Maximum SPL | 100dB full bandwidth, 102dB above 100Hz (manufacturer specified) | - |
| Spinorama Preference Score | 5.24 | 4.17 |
| Spinorama Preference Score with Perfect Sub | 7.90 | 6.42 |
| DIY Kit | No | No |
Frequency Response Compared
Both speakers’ spinorama measurements, overlaid. A flatter line is more neutral: peaks sound forward or harsh, dips sound recessed. Each curve is shifted so its average from 300 Hz to 3 kHz sits at 0 dB, so loudness differences between the two are removed and only the shape is compared.
Measurement data: AsciLab F6Bs (measured by Audio Science Review) and Mission LX-3 MKII (measured by Audio Science Review), via spinorama.org.
Related Speaker Comparisons
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Prices on this page were last checked October 15, 2026 at 5:41 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
AsciLab F6Bs: €799 per pair Audiophonics eBay
Same family: the AsciLab F6B (smaller bookshelf, ranked higher, rated 4.6/5).
Pros: A slimmer, sealed, VESA 100 wall mountable variant of the AsciLab F6B, trading the AsciLab F6B’s passive radiator for a shallower 15.4cm deep cabinet that can go straight on a wall bracket. Off axis sound tracks the on axis response unusually consistently for a sealed 2-way this size, and on axis deviation measures a clean 0.25dB average. Measured bass extension of 82.0Hz (-3dB), with a measured sensitivity of 85.2dB.
Cons: AsciLab’s own site shows the F6Bs sold out, though it remains in stock through resellers like Audiophonics and Tested Audio. Bass extension is measured at 82.0Hz at -3dB, noticeably less than the passive radiator equipped AsciLab F6B, and listening window smoothness measures only a moderate 0.39. The 4 ohm nominal impedance calls for a reasonably capable amplifier.
Full AsciLab F6Bs review and specifications →
| Bass Extension (-10dB) | 50.1Hz (measured, Audio Science Review) |
|---|---|
| Bass Extension (-3dB) | 82.0Hz (measured, Audio Science Review) |
| Country | South Korea |
| Crossover Frequency | 1kHz |
| DIY Kit | No |
| Dimensions | 14.5”H x 8”W x 6.1”D (368 x 203 x 154 mm) |
| Drivers | 1” aluminum dome tweeter with waveguide and phase plug, 6” fiber cone woofer |
| Enclosure | sealed |
| Impedance | 4 ohms nominal, 3.7 ohms minimum |
| Maximum SPL | 100dB full bandwidth, 102dB above 100Hz (manufacturer specified) |
| Mounting | VESA 100 wall mount compatible |
| Sensitivity | 85.2dB @ 2.83V/1m (measured, Audio Science Review) |
| Spinorama Preference Score | 5.24 |
| Spinorama Preference Score with Perfect Sub | 7.90 |
| Warranty | 2 years |
| Weight | 12.3 lbs (5.6 kg) each |
- Links
- Reviews, Comparisons and Sound Samples
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Mission LX-3 MKII: £249 per pair Richer Sounds eBay
Pros: A large affordable standmount with a 6.5-inch woofer, 88dB rated sensitivity and useful bass. ASR measured 48Hz estimated in-room extension, a controlled Q of 0.60, a 6.42 subwoofer-assisted preference score and reasonable +/-55-degree horizontal coverage. Measured bass extension of 67.4Hz (-3dB).
Cons: On-axis smoothness of 0.217 and predicted in-room smoothness of 0.344 reveal clear response unevenness, with a -0.46dB-per-octave downward tilt. The 345mm-tall, 8.4kg cabinet is bulky and current US availability is limited.
Full Mission LX-3 MKII review and specifications →
| Released | Jan 2021 (5 years ago) |
|---|---|
| Bass Extension (-10dB) | 42.5Hz (derived from ASR on-axis curve, spinorama.org) |
| Bass Extension (-3dB) | 67.4Hz (measured, ASR via spinorama.org) |
| Country | United Kingdom (design) |
| DIY Kit | No |
| Dimensions | 13.6H x 8.9W x 12.1D in |
| Drivers | 1” microfiber-dome tweeter, 6.5” composite-fiber woofer |
| Enclosure | 2-way, bass-reflex |
| Impedance | 8 ohms nominal, 4.1 ohms minimum |
| Sensitivity | 88dB |
| Spinorama Preference Score | 4.17 |
| Spinorama Preference Score with Perfect Sub | 6.42 |
| Weight | 18.5 lbs (8.4 kg) each |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Mission LX-3 MKII vs Philharmonic BMR Monitor
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