Short answer: the Fosi Audio SP601, though neither ranks well in its class. It ranks #201 of 222 bookshelf speakers by sound quality (rated 2.7/5) at $399.99 and is still sold new; the Dayton Audio MK602X ranks #211 (rated 2.4/5) and is discontinued, so it is only an option used. Both are rated below 3.0/5 among the 222 bookshelf speakers; for better sound, the ELAC Debut 3.0 DB63 ranks #49 at $469.99.
The Fosi Audio SP601 is the better-sounding, deeper-bass pick. 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 72Hz for the Dayton Audio MK602X. 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.
The case for the Dayton Audio MK602X: An inexpensive compact Dayton bookshelf speaker with a 6.5 inch woofer, decent bass for its size and a tidy cabinet. The tradeoff: The top end sits roughly 5dB above the midband, producing brightness that can masquerade as detail.
Buy the Fosi Audio SP601. It is rated higher for sound quality; the Dayton Audio MK602X is no longer sold new.
Want more options? Browse the full Passive Home rankings.
Measured Differences
- Close enough not to matter: bass extension (40 Hz vs 43 Hz, 10 dB down).
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Specifications Side By Side
| Fosi Audio SP601 | Dayton Audio MK602X | |
|---|---|---|
| Price | $399.99 per pair | $149 per pair Discontinued |
| Ranked | #201 of 222 in Large Size Bookshelf Speakers | #211 of 222 in Large Size Bookshelf Speakers |
| Drivers | 6.5” woofer, 1.5” Silk Dome Tweeters | 1” silk-dome tweeter; 6.5” glass-fiber midwoofer |
| Weight | 11.5 lbs (5.2 kg) | - |
| Dimensions | 14.5”H x 9.1”W x 14”D (368.3 x 231.1 x 355.6 mm) | 15.1”H x 8.6”W x 11.8”D |
| App | No | - |
| EQ | No | - |
| DSP | No | - |
| Power Handling | 80w RMS Per Speaker | - |
| Sensitivity | 85.4dB (measured, Erin’s Audio Corner) | Approximately 85dB/2.83V/1m (measured, Erin’s Audio Corner) |
| Impedance | 4 ohms nominal, 4.1 ohms minimum (measured, Erin’s Audio Corner) | 4 ohms nominal (manufacturer specified; Erin’s impedance measurement confirms a low-impedance load) |
| Woofer Cabinet | ported, rear | ported, rear |
| Bass Extension (-10dB) | 40Hz (measured, Erin’s Audio Corner) | 43Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-3dB) | 59Hz (measured, Erin’s Audio Corner) | 72Hz (measured, Erin’s Audio Corner) |
| DIY Kit | No | No |
| Spinorama Preference Score | - | 4.39 |
| Spinorama Preference Score with Perfect Sub | - | 6.91 |
Where the Ratings Come From
- Fosi Audio SP601: reviews by Erin’s Audio Corner and Audio Science Review Fosi Audio SP60.
- Dayton Audio MK602X: 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.
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