Short answer: the GR-Research NX-Studio. It ranks #4 of 222 bookshelf speakers by sound quality (rated 4.8/5); the AsciLab F6Bs ranks #20 (rated 4.5/5).
What the AsciLab F6Bs does well: A slim, sealed bookshelf speaker that mounts flat on a wall bracket, with accurate sound and wide, even dispersion for a great price. Watch for: AsciLab’s own site shows the F6Bs sold out, though it remains in stock through resellers like Audiophonics and Tested Audio.
What the GR-Research NX-Studio does well: A DIY kit bookshelf speaker with a ribbon tweeter for wide open, detailed sound, superb imaging, and tight, fast sealed bass. Watch for: Bass will be very tight but won’t be quite as deep as others due to the sealed woofer enclosure.
Buy the GR-Research NX-Studio. It is rated higher for sound quality than the AsciLab F6Bs.
Still deciding? The full Passive Home rankings cover every ranked option.
A slim, sealed bookshelf speaker that mounts flat on a wall bracket, with accurate sound and wide, even dispersion for a great price.
A DIY kit bookshelf speaker with a ribbon tweeter for wide open, detailed sound, superb imaging, and tight, fast sealed bass.
Prices on this page were last checked October 31, 2026 at 7:11 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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Specifications Side By Side
| AsciLab F6Bs | GR-Research NX-Studio | |
|---|---|---|
| Price | €799 per pair | $3630 per pair |
| Ranked | #20 of 222 in Large Size Bookshelf Speakers | #4 of 222 in Large Size Bookshelf Speakers |
| Enclosure | sealed | - |
| Drivers | 1” aluminum dome tweeter with waveguide and phase plug, 6” fiber cone woofer | GR-Research M165NQ 6.5” paper cone, non-resonant polymer frame, copper shorting rings and aluminum phase plug sealed enclosure woofer, GR-Research Neo3 Planar Magnetic Ribbon open baffle tweeter |
| Dimensions | 14.5”H x 8”W x 6.1”D (368 x 203 x 154 mm) | 18”H x 8.5”W x 15.5”D (457.2 x 215.9 x 393.7 mm) |
| Weight | 12.3 lbs (5.6 kg) each | 20.5 lbs (9.3 kg) each |
| Sensitivity | 85.2dB @ 2.83V/1m (measured, Audio Science Review) | 87dB |
| Impedance | 4 ohms nominal, 3.7 ohms minimum | 8 ohms |
| Bass Extension (-3dB) | 82.0Hz (measured, Audio Science Review) | - |
| Bass Extension (-10dB) | 50.1Hz (measured, Audio Science Review) | - |
| Crossover Frequency | 1kHz | - |
| Mounting | VESA 100 wall mount compatible | - |
| Warranty | 2 years | - |
| Country | South Korea | - |
| Maximum SPL | 100dB full bandwidth, 102dB above 100Hz (manufacturer specified) | - |
| Spinorama Preference Score | 5.24 | - |
| Spinorama Preference Score with Perfect Sub | 7.90 | - |
| DIY Kit | No | Yes |
| Woofer Cabinet | - | sealed |
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