Short answer: the ELAC Debut 3.0 DB63, because the Fosi Audio SP601’s response is erratic. The SP601 is a two-way with a 6.5-inch paper/aluminum-alloy composite cone woofer and 1.5-inch silk dome tweeter, but it shows an unusually up-and-down frequency response: a scooped midrange followed by an upper-mid bump, a dip and another small bump. The DB63’s worst fault is a much simpler 1.5dB dip from 300-600Hz that reduces vocal warmth.
The Fosi Audio SP601 is the deeper-bass choice. A budget bookshelf speaker with a 6.5 inch woofer and respectable bass that improves noticeably with simple EQ. Its bass reaches about 59Hz before falling 3dB, against 76Hz for the ELAC Debut 3.0 DB63. The tradeoff: 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 ELAC Debut 3.0 DB63. It is rated higher for sound quality, and saving $70 with the Fosi Audio SP601 does not make up for the sound-quality gap.
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Specifications Side By Side
| ELAC Debut 3.0 DB63 | Fosi Audio SP601 | |
|---|---|---|
| Price | $469.99 per pair | $399.99 per pair |
| Ranked | #49 of 222 in Large Size Bookshelf Speakers | #201 of 222 in Large Size Bookshelf Speakers |
| Bass Extension (-10dB) | 40Hz (measured, Erin’s Audio Corner) | 40Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-3dB) | 76Hz (measured, Erin’s Audio Corner) | 59Hz (measured, Erin’s Audio Corner) |
| Dimensions | 13.3”H x 7.7”W x 11.7”D (337.8 x 195.6 x 297.2 mm) | 14.5”H x 9.1”W x 14”D (368.3 x 231.1 x 355.6 mm) |
| Impedance | 6 ohms nominal (4.4 ohms minimum, measured, Erin’s Audio Corner) | 4 ohms nominal, 4.1 ohms minimum (measured, Erin’s Audio Corner) |
| Sensitivity | 86.2dB (measured, Erin’s Audio Corner) | 85.4dB (measured, Erin’s Audio Corner) |
| Drivers | 6.5” Aramid Fiber woofer, 1” soft dome tweeter | 6.5” woofer, 1.5” Silk Dome Tweeters |
| Weight | 17.2 lbs (7.8 kg) each | 11.5 lbs (5.2 kg) |
| Woofer Cabinet | ported, rear | ported, rear |
| DIY Kit | No | No |
| App | - | No |
| EQ | - | No |
| DSP | - | No |
| Power Handling | - | 80w RMS Per Speaker |
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