Short answer: the AsciLab C6B. It ranks #6 of 222 bookshelf speakers by sound quality, rated 4.7/5, at $1,145; the Buchardt Audio E50 ranks #16, rated 4.5/5, and costs $4,600, so there is little reason to consider the other one.
What the AsciLab C6B does well: Bookshelf speakers with very accurate sound and an unusually wide, stable soundstage, for any seating position. Watch for: Bass rolls off around 50Hz in-room (F3 54Hz, F10 35Hz), so a subwoofer is needed for real extension below that.
The Buchardt Audio E50 is the deeper-bass choice. A bookshelf speaker with remarkably deep bass for its size, a very neutral midrange, and low distortion, with no need to sit near a wall. Its bass reaches about 40Hz before falling 3dB, against 54Hz for the AsciLab C6B. The catch: A roughly 3dB dip in the upper midrange/lower treble softens attack and dialogue clarity: the reviewer’s main complaint, and it’s baked into the crossover rather than a directivity artifact, so it’s audible both on and off axis.
Buy the AsciLab C6B. It is rated higher for sound quality than the Buchardt Audio E50 and costs less, so it is the default pick unless a specific strength of the other one matters more to you.
Want more options? Browse the full Passive Home rankings.
Bookshelf speakers with very accurate sound and an unusually wide, stable soundstage, for any seating position.
A bookshelf speaker with remarkably deep bass for its size, a very neutral midrange, and low distortion, with no need to sit near a wall.
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Specifications Side By Side
| AsciLab C6B | Buchardt Audio E50 | |
|---|---|---|
| Price | $1145 per pair | $4600 per pair |
| Ranked | #6 of 222 in Large Size Bookshelf Speakers | #16 of 222 in Large Size Bookshelf Speakers |
| Bass Extension (-10dB) | 35Hz (measured, Erin’s Audio Corner) | 34Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-3dB) | 54Hz (measured, Erin’s Audio Corner) | 40Hz (measured, Erin’s Audio Corner) |
| Dimensions | 15.7”H x 8”W x 10.4”D (398.8 x 203.2 x 264.2 mm) | 15.6” x 7.5” x 11.2” (395 x 190 x 284 mm) |
| Impedance | 4 ohms nominal, 2.6 ohms minimum (measured, Erin’s Audio Corner) | 4 ohms nominal |
| Sensitivity | 85.6dB (measured, Erin’s Audio Corner) | 83.1dB (2.83V/1m, measured by Erin’s Audio Corner) |
| Drivers | 6” Aluminium Ceramic Cone with cast Aluminium Chassis woofer, 1” Aluminium Ceramic Dome tweeter | 1” Scanspeak dome tweeter with waveguide, 6.5” Purifi extended-stroke woofer, dual 6.5” passive radiators |
| Weight | 18.5 lbs (8.4 kg) each | 19 lbs (8.6 kg) each |
| Woofer Cabinet | passive radiator | Passive radiator loaded |
| Spinorama Preference Score | 6.33 | 5.84 |
| Spinorama Preference Score with Perfect Sub | 8.28 | 7.61 |
| DIY Kit | No | No |
| Crossover Frequency | - | 2000Hz |
| Frequency Response | - | 36Hz - 30kHz ±3dB (Manufacturer specified) |
| Recommended Power | - | 60W - 200W |
| Country | - | Denmark |
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