The Fosi Audio SP601 ranks #46 out of 48 total Large Size Bookshelf Speakers for sound quality. See Top Recommended Speakers By Attribute for all the top speaker suggestions.
#46 Fosi Audio SP601: $399.99 Fosiaudio Amazon
Pros: Two-way bookshelf design with a 6.5” paper/aluminum-alloy composite cone woofer and 1.5” silk dome tweeter. Bass reaches a respectable 60-70Hz in most rooms (F3 59Hz, F10 40Hz) for a budget bookshelf speaker. Distortion at 86dB and 96dB measures reasonably well at face value, and compression issues at extreme output are generally in line with what’s expected for a speaker at this price point. The overall tonal character can be substantially improved with basic EQ - the reviewer found a boost around 400Hz plus a cut around 4kHz brought it to an acceptable baseline.
Cons: 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 4-7kHz peak gives a sharp, sibilant edge to S and T sounds in vocals. A strong diffraction dip around 4kHz followed by a peak can’t be fully corrected with EQ; the reviewer recommends sidewall absorption panels instead, since off-axis energy in the 2-7kHz range actually exceeds the direct sound reaching the listener. Multitone distortion becomes more noticeable and grainy at higher volumes, concentrated in the upper-midrange where hearing is most sensitive. A peaking distortion issue right at the crossover region suggests a possible combination of tweeter distortion and midwoofer/crossover-component strain. The enclosure sounds notably hollow when tapped, and a flashlight inspection suggested a lack of internal damping material, along with likely insufficient bracing. Vertical listening position is fairly tightly constrained around the tweeter axis. Still requires a subwoofer for real kick-drum impact and bass authority.
How it compares: Just above it: Chesky LC1 - $600 more. Just below it: Yamaha NS-10 - $99 more.
| App | No |
|---|---|
| Bluetooth | No |
| DSP | No |
| Dimensions | 14.5"H x 9.1"W x 14.0"D (368.3 x 231.1 x 355.6 mm) |
| Driver | 6.5" woofer, 1.5" Silk Dome Tweeters |
| EQ | No |
| Output Power | 80w RMS Per Speaker |
| Weight | 11.5 lbs / 5.2 kg |
- Reviews, Comparisons and Sound Samples
- Links
As an Amazon Associate I earn from qualifying purchases.
Product prices and availability were last checked August 7, 2026 at 5:43 AM UTC and are subject to change; the price and availability shown on Amazon at the time of purchase will apply to the purchase of this product.