Short answer: the KEF Q Concerto Meta. It ranks #11 of 222 bookshelf speakers by sound quality, rated 4.6/5, at $999.99. The Fosi Audio SP601 ranks #201, rated 2.7/5, at $399.99, $600 cheaper, which does not close the gap in sound quality.
The KEF Q Concerto Meta is the better-sounding, deeper-bass choice. A neutral three way bookshelf speaker that sounds consistent from seat to seat, with smooth treble that many rivals at its price lack. Its bass reaches about 53Hz before falling 3dB, against 59Hz for the Fosi Audio SP601. Watch for: Radiation pattern measures about ±50°, narrower than the reviewer’s preferred ±60° for a stronger sense of envelopment.
The case for the Fosi Audio SP601: A budget bookshelf speaker with a 6.5 inch woofer and respectable bass that improves noticeably with simple EQ. Watch for: An unusually erratic, up-and-down frequency response (a scooped midrange followed by an upper-mid bump, a dip, another small bump, then a strong 3-4dB peak around 4-7kHz) makes the speaker’s overall character genuinely hard to characterize: the reviewer compared the experience to a similarly disliked model, the Triangle Borea BR03, which has a comparably inconsistent response.
Buy the KEF Q Concerto Meta. It is rated higher for sound quality, and the $600 you would save on the Fosi Audio SP601 does not close the gap.
Still deciding? The full Passive Home rankings cover every ranked option.
Measured Differences
- Close enough not to matter: bass extension (35 Hz vs 40 Hz, 10 dB down).
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Specifications Side By Side
| KEF Q Concerto Meta | Fosi Audio SP601 | |
|---|---|---|
| Price | $999.99 per pair | $399.99 per pair |
| Ranked | #11 of 222 in Large Size Bookshelf Speakers | #201 of 222 in Large Size Bookshelf Speakers |
| Bass Extension (-10dB) | 35Hz (measured, Erin’s Audio Corner) | 40Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-3dB) | 53Hz (measured, Erin’s Audio Corner) | 59Hz (measured, Erin’s Audio Corner) |
| Dimensions | 16.3”H x 8.3”W x 12.4”D (414 x 210.8 x 315 mm) | 14.5”H x 9.1”W x 14”D (368.3 x 231.1 x 355.6 mm) |
| Impedance | 4 ohms nominal (3.3 ohms minimum above 80Hz, measured by Erin’s Audio Corner) | 4 ohms nominal, 4.1 ohms minimum (measured, Erin’s Audio Corner) |
| Drivers | 165 mm (6.5 in.) hybrid aluminium cone woofer, 100 mm (4 in.) aluminium cone midrange, 19 mm (0.75 in.) vented aluminium dome with MAT tweeter | 6.5” woofer, 1.5” Silk Dome Tweeters |
| Sensitivity | 84.2dB (measured average, Erin’s Audio Corner) | 85.4dB (measured, Erin’s Audio Corner) |
| Weight | 20.9 lbs (9.5 kg) each | 11.5 lbs (5.2 kg) |
| Woofer Cabinet | ported, rear | ported, rear |
| Spinorama Preference Score | 6.01 | - |
| Spinorama Preference Score with Perfect Sub | 7.71 | - |
| DIY Kit | No | No |
| App | - | No |
| EQ | - | No |
| DSP | - | No |
| Power Handling | - | 80w RMS Per Speaker |
Where the Ratings Come From
- KEF Q Concerto Meta: Spinorama.org measurements and reviews by Erin’s Audio Corner.
- Fosi Audio SP601: reviews by Erin’s Audio Corner and Audio Science Review Fosi Audio SP60.
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.
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