Short answer: the KEF Q3 Meta. It ranks #156 of 222 bookshelf speakers by sound quality, rated 3.4/5, at $899.99. The HSU Research MFL-6 ranks #166, rated 3.3/5, at $558, $341.99 cheaper, which does not close the gap in sound quality.
The KEF Q3 Meta is the more accurate, deeper-bass option. Coaxial bookshelf speakers with very wide dispersion, punchy kick drums and bass tuning that works close to a wall. Its measured preference score, a predictor of how neutral it sounds, is 4.66 against 2.63 for the HSU Research MFL-6. Its bass reaches about 52Hz before falling 3dB, against 77.6Hz for the HSU Research MFL-6. The tradeoff: Not well suited to high-output use: compression and strain in the 1-2kHz region emerge above about 90dB at 10 feet, so a high-output home theater setup isn’t the best application.
What the HSU Research MFL-6 does well: An affordable high output bookshelf speaker with a horn loaded tweeter, easy to drive, that can sit on a wall, stand or sideways. The tradeoff: Its response deviation is substantial and the horn narrows dispersion, so tonal balance and seating coverage are less even than the best conventional monitors.
Buy the KEF Q3 Meta. It is rated higher for sound quality, and saving $341.99 with the HSU Research MFL-6 does not make up for the sound-quality gap.
Still deciding? The full Passive Home rankings cover every ranked option.
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Specifications Side By Side
| KEF Q3 Meta | HSU Research MFL-6 | |
|---|---|---|
| Price | $899.99 per pair | $558 per pair |
| Ranked | #156 of 222 in Large Size Bookshelf Speakers | #166 of 222 in Large Size Bookshelf Speakers |
| Bass Extension (-10dB) | 37Hz (measured, Erin’s Audio Corner) | about 41.0Hz (measured, Audio Science Review) |
| Bass Extension (-3dB) | 52Hz (measured, Erin’s Audio Corner) | 77.6Hz (measured, spinorama.org) |
| Impedance | 4 ohms nominal, 3.7 ohms minimum (measured above 80Hz, Erin’s Audio Corner) | 8 ohms |
| Sensitivity | 84.5dB (measured average 300Hz-3kHz @ 2.83V/1m, Erin’s Audio Corner; 87dB manufacturer specified) | 85.6dB (measured average 300Hz-3kHz @ 2.83V/1m, spinorama.org) |
| Drivers | 165 mm (6.5 in.) aluminium cone woofer, 25 mm (1 in.) vented aluminium dome with MAT tweeter | 1” horn-loaded tweeter, 6.5” paper-cone woofer |
| Woofer Cabinet | ported, rear | - |
| Weight | 15.9 lbs (7.2 kg) | 13 lbs (5.9 kg) each |
| Dimensions | 14.1”H x 8.3”W x 12”D (357.0 x 210.0 x 305.0 mm) | 16H x 8W x 6.25-10.375D in |
| Spinorama Preference Score | 4.66 | 2.63 |
| Spinorama Preference Score with Perfect Sub | 6.50 | 4.77 |
| DIY Kit | No | No |
| Enclosure | - | 2-way bass reflex |
| Frequency Response | - | 60Hz-20kHz +/-2dB |
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