The March Audio Sointuva ranks #6 out of 84 total Large Size Bookshelf Speakers for sound quality. See Top Recommended Speakers By Attribute for all the top speaker suggestions.
#6 March Audio Sointuva: $3,995/pair March Audio
Pros: The Purifi woofer and Satori waveguided tweeter combine class-leading distortion with unusually deep extension for a compact cabinet. Erin measured roughly 83dB sensitivity yet found the speaker could still sustain about 96dB/1m with 3% THD not crossed until ~60Hz; compression remains exceptionally low until the deepest bass at the highest sweep. Horizontal directivity is broad and smooth, the early-reflections trend is readily equalizable, and the passive radiators avoid port turbulence while reaching approximately 50Hz anechoic and lower in-room.
Cons: 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. Vertical directivity shows the unavoidable woofer/tweeter crossover cancellation, so stand height matters. The original waveguide narrows somewhat in the upper treble compared with the later AWG revision, and the premium price is difficult to justify if low-level listening or an 80Hz sub crossover leaves the Purifi woofer’s excursion capability unused.
How it compares: Just above it: March Audio Sointuva AWG - $155 more, 0.6Hz lower bass extension (-3dB). Just below it: AsciLab C6B - $2850 cheaper, 2.6Hz higher bass extension (-3dB).
| Bass Extension (-3dB) | ~50Hz (measured, Erin's Audio Corner) |
|---|---|
| Drivers | 6.5-inch Purifi woofer; Satori waveguided dome tweeter; dual passive radiators |
| Enclosure | Dual passive radiator |
| Impedance | ~4 ohms average; 3.8 ohms minimum (measured, Erin's Audio Corner) |
| Sensitivity | ~83dB/2.83V/1m (measured, Erin's Audio Corner) |
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