Short answer: the AsciLab C6B. It ranks #6 of 203 bookshelf speakers by sound quality (rated 4.7/5) at $1,145 and is still sold new; the Focal Aria 906 ranks #150 (rated 3.3/5) and is discontinued, so it is only an option used. The Focal Aria 906’s replacement, the Focal Aria Evo X N°1, is rated 3.5/5.
The case for the Focal Aria 906: CEA2034 spinorama shows very flat bass response, with the reviewer rating overall performance “good.” Watch for: 3dB dip around 2.8kHz.
The AsciLab C6B is the more accurate, deeper-bass pick. Two-way design pairing a 1” aluminum ceramic dome tweeter on a large waveguide with a 6” aluminum ceramic cone woofer, crossed over at 1.1kHz, plus a rear passive radiator. Its measured preference score, a predictor of how neutral it sounds, is 6.33 against 4.64 for the Focal Aria 906. Its bass reaches about 54Hz before falling 3dB, against 63Hz for the Focal Aria 906. The tradeoff: Bass rolls off around 50Hz in-room (F3 54Hz, F10 35Hz), so a subwoofer is needed for real extension below that.
Buy the AsciLab C6B. It is rated higher for sound quality; the Focal Aria 906 is no longer sold new.
Looking for alternatives? See the complete Passive Home rankings.
Specifications Side By Side
| Focal Aria 906 | AsciLab C6B | |
|---|---|---|
| Price | $2,199.00 per pair used, Discontinued | $1145 per pair |
| Ranked | #150 of 203 in Large Size Bookshelf Speakers | #6 of 203 in Large Size Bookshelf Speakers |
| Bass Extension (-10dB) | 47Hz (measured, Erin’s Audio Corner) | 35Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-3dB) | 63Hz (measured, Erin’s Audio Corner) | 54Hz (measured, Erin’s Audio Corner) |
| Impedance | 4 ohms nominal (4.8 ohms minimum above 80Hz, measured by Erin’s Audio Corner) | 4 ohms nominal, 2.6 ohms minimum (measured, Erin’s Audio Corner) |
| Sensitivity | 86.5dB (measured average, Erin’s Audio Corner) | 85.6dB (measured, Erin’s Audio Corner) |
| Drivers | 26mm tweeter + 165mm mid-woofer | 6” Aluminium Ceramic Cone with cast Aluminium Chassis woofer, 1” Aluminium Ceramic Dome tweeter |
| Weight | 39.9 lbs (18.1 kg) | 18.5 lbs (8.4 kg) each |
| Dimensions | 15.4”H x 8.9”W x 11”D (390.0 x 225.0 x 280.0 mm) | 15.7”H x 8”W x 10.4”D (398.8 x 203.2 x 264.2 mm) |
| Woofer Cabinet | ported, front | passive radiator |
| Spinorama Preference Score | 4.64 | 6.33 |
| Spinorama Preference Score with Perfect Sub | 7.00 | 8.28 |
| DIY Kit | No | No |
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Prices on this page were last checked October 7, 2026 at 9:25 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
Focal Aria 906: $2,199.00 per pair used Discontinued Amazon eBay
Newer model: the Focal Aria Evo X N°1, ranked higher, estimated 3.5/5.
Pros: CEA2034 spinorama shows very flat bass response, with the reviewer rating overall performance “good.” Predicted in-room response is almost perfect prior to 1kHz. Horizontal dispersion of about ±60 degrees is good and stays even out to about -12dB before getting erratic. Woofer distortion is quite low at 86dB SPL/1m. Measured bass extension of 63Hz (-3dB), with a measured sensitivity of 86.5dB.
Cons: 3dB dip around 2.8kHz. Some resonance around 800Hz, small directivity error around 7kHz. A dip in the upper midrange also shows up in the predicted in-room response. Distortion becomes problematic at 96dB SPL/1m, with a notable peak around 1.3-1.5kHz alongside broader midrange elevation. Discontinued.
Full Focal Aria 906 review and specifications →
| Bass Extension (-10dB) | 47Hz (measured, Erin’s Audio Corner) |
|---|---|
| Bass Extension (-3dB) | 63Hz (measured, Erin’s Audio Corner) |
| DIY Kit | No |
| Dimensions | 15.4”H x 8.9”W x 11”D (390.0 x 225.0 x 280.0 mm) |
| Drivers | 26mm tweeter + 165mm mid-woofer |
| Impedance | 4 ohms nominal (4.8 ohms minimum above 80Hz, measured by Erin’s Audio Corner) |
| Sensitivity | 86.5dB (measured average, Erin’s Audio Corner) |
| Spinorama Preference Score | 4.64 |
| Spinorama Preference Score with Perfect Sub | 7.00 |
| Weight | 39.9 lbs (18.1 kg) |
| Woofer Cabinet | ported, front |
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AsciLab C6B: $1145 per pair Ascilab eBay
Same family: the AsciLab C5B (smaller bookshelf, rated 4.2/5).
Pros: Two-way design pairing a 1” aluminum ceramic dome tweeter on a large waveguide with a 6” aluminum ceramic cone woofer, crossed over at 1.1kHz, plus a rear passive radiator. Unusual trait: horizontal radiation actually widens at higher frequencies instead of narrowing like most two-way designs, which keeps image focus and soundstage depth consistent whether you toe the speakers in or out (5-10° off-axis was the sweet spot in testing). Vertical radiation also stays wide straight through the 2kHz crossover region, so the sound doesn’t collapse when standing up: unusual at this price. CA2034 measurements show strong on-axis linearity, listening window, early reflections, and directivity. Midrange and tweeter distortion stay very low even at 96dB, holding up against a $5,900 Arendal speaker in that regard despite roughly a 5x price gap. At $1145 shipped to the US, the reviewer calls it the best-value bookshelf speaker he’s tested, rivaling speakers 2-5x the price. Measured bass extension of 54Hz (-3dB), with a measured sensitivity of 85.6dB.
Cons: Bass rolls off around 50Hz in-room (F3 54Hz, F10 35Hz), so a subwoofer is needed for real extension below that. Low-frequency harmonic distortion increases substantially at 96dB versus 86dB, though it’s second-order and less audible than it looks on paper. Minimum impedance dips to 2.6 ohms (EPDR as low as 1.2 ohms), so it wants an amplifier comfortable driving 4-ohm loads, ideally 100W or more. At 102dB, compression noticeably eats into midrange, bass, and some treble output. Shipping to the US adds roughly $200 on top of AsciLab’s list price. Against the reviewer’s reference Audiofirst Fidelia at a similar price, has slightly less lower-midrange body (about 1dB difference) and a smaller perceived soundstage size.
Full AsciLab C6B review and specifications →
| Bass Extension (-10dB) | 35Hz (measured, Erin’s Audio Corner) |
|---|---|
| Bass Extension (-3dB) | 54Hz (measured, Erin’s Audio Corner) |
| DIY Kit | No |
| Dimensions | 15.7”H x 8”W x 10.4”D (398.8 x 203.2 x 264.2 mm) |
| Drivers | 6” Aluminium Ceramic Cone with cast Aluminium Chassis woofer, 1” Aluminium Ceramic Dome tweeter |
| Impedance | 4 ohms nominal, 2.6 ohms minimum (measured, Erin’s Audio Corner) |
| Sensitivity | 85.6dB (measured, Erin’s Audio Corner) |
| Spinorama Preference Score | 6.33 |
| Spinorama Preference Score with Perfect Sub | 8.28 |
| Weight | 18.5 lbs (8.4 kg) each |
| Woofer Cabinet | passive radiator |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons