Short answer: the March Audio Sointuva AWG, if you are buying new. The March Audio Sointuva ranks higher than the Buchardt Audio E50 (#8 vs #16 of 222 bookshelf speakers) but is discontinued; its replacement, the March Audio Sointuva AWG, is rated 4.7/5 at $4,150 and is still sold new.
The March Audio Sointuva is the more accurate choice. A compact bookshelf speaker with Purifi drivers, extremely low distortion, and deep bass from passive radiators, now discontinued but worth buying used. Its measured preference score, a predictor of how neutral it sounds, is 6.80 against 5.84 for the Buchardt Audio E50. The catch: Erin measured a 3.8-ohm minimum and an average load near four ohms; combined with ~83dB sensitivity, this demands a powerful four-ohm-stable amplifier even though the drivers tolerate that power cleanly.
The Buchardt Audio E50 is the deeper-bass option. 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 50Hz for the March Audio Sointuva. 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 March Audio Sointuva AWG, the replacement for the discontinued March Audio Sointuva; it is rated higher for sound quality than the Buchardt Audio E50.
Looking for alternatives? See the complete Passive Home rankings.
Measured Differences
- Tonal accuracy above the bass: with a subwoofer taking the low end, the March Audio Sointuva scores 8.4 against 7.6 for the Buchardt Audio E50 on the Spinorama preference scale. Its frequency response and off-axis sound are smoother, so voices and instruments sound closer to the recording.
- Close enough not to matter: bass extension (32.7 Hz vs 34 Hz, 10 dB down).
Prices on this page were last checked November 14, 2026 at 6:17 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.
As an eBay Partner, we may be compensated if you make a purchase.
Specifications Side By Side
| March Audio Sointuva | Buchardt Audio E50 | |
|---|---|---|
| Price | $3,995 per pair Discontinued | $4600 per pair |
| Ranked | #8 of 222 in Large Size Bookshelf Speakers | #16 of 222 in Large Size Bookshelf Speakers |
| Bass Extension (-3dB) | ~50Hz (measured, Erin’s Audio Corner) | 40Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-10dB) | 32.7Hz (measured, Erin’s Audio Corner) | 34Hz (measured, Erin’s Audio Corner) |
| Sensitivity | ~83dB/2.83V/1m (measured, Erin’s Audio Corner) | 83.1dB (2.83V/1m, measured by Erin’s Audio Corner) |
| Impedance | ~4 ohms average; 3.8 ohms minimum (measured, Erin’s Audio Corner) | 4 ohms nominal |
| Drivers | 6.5-inch Purifi woofer; Satori waveguided dome tweeter; dual passive radiators | 1” Scanspeak dome tweeter with waveguide, 6.5” Purifi extended-stroke woofer, dual 6.5” passive radiators |
| Enclosure | Dual passive radiator | - |
| Spinorama Preference Score | 6.80 | 5.84 |
| Spinorama Preference Score with Perfect Sub | 8.45 | 7.61 |
| Dimensions | 17.7”H x 9.4”W x 8.7”D (450 x 240 x 220 mm) | 15.6” x 7.5” x 11.2” (395 x 190 x 284 mm) |
| Weight | 14.6 lbs (6.6 kg) each | 19 lbs (8.6 kg) each |
| DIY Kit | No | No |
| Woofer Cabinet | - | Passive radiator loaded |
| Crossover Frequency | - | 2000Hz |
| Frequency Response | - | 36Hz - 30kHz ±3dB (Manufacturer specified) |
| Recommended Power | - | 60W - 200W |
| Country | - | Denmark |
Where the Ratings Come From
- March Audio Sointuva: Spinorama.org measurements and reviews by Erin’s Audio Corner video.
- Buchardt Audio E50: Spinorama.org measurements and reviews by Erin’s Audio Corner.
This comparison is generated from the ratings, specifications and measurements on each product’s own page, and it updates when that data changes. How we rank explains how each rating is decided.
Related Speaker Comparisons
How March Audio Sointuva compares with other leading options: