Short answer: the Sony SS-CS5 M2. It ranks #87 of 160 bookshelf speakers by sound quality, rated 3.2/5, at $153; the Q Acoustics 5020 ranks #140, rated 2.2/5, and costs $1,199, which makes this an easy call rather than a real tradeoff.
The Sony SS-CS5 M2 is the better-sounding, deeper-bass choice. Added internal bracing (corners, sides, front baffle) plus an updated crossover meaningfully reduce the resonance issues that plagued the original SS-CS5, giving a smoother, more neutral character overall. Its bass reaches about 80Hz before falling 3dB, against 103Hz for the Q Acoustics 5020. The tradeoff: Mild sibilance in the 3-5kHz range stands out on S and T sounds in vocals.
The case for the Q Acoustics 5020: Attractively finished compact standmount with a 5-inch Continuous Curved Cone woofer and carefully engineered cabinet details. The catch: Erin found the tonal balance distinctly too crisp, forward and treble-heavy: the top end is roughly 3-5dB elevated while the 1-3kHz region is recessed, so vocals change level unnaturally as they move through their range.
Buy the Sony SS-CS5 M2. It is rated higher for sound quality than the Q Acoustics 5020 and costs less, which makes it the one to get unless you need something the other one does better.
Looking for alternatives? See the complete Passive Home rankings.
Specifications Side By Side
| Sony SS-CS5 M2 | Q Acoustics 5020 | |
|---|---|---|
| Price | $153.00 per pair | $1,199.00 per pair |
| Ranked | #87 of 160 in Medium Size Bookshelf Speakers | #140 of 160 in Medium Size Bookshelf Speakers |
| Bass Extension (-10dB) | 54Hz (measured, Erin’s Audio Corner) | 48Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-3dB) | 80Hz (measured, Erin’s Audio Corner) | 103Hz (measured, Erin’s Audio Corner) |
| Dimensions | 13.2”H x 7”W x 8.7”D (335 x 178 x 220 mm) | 11.2”H x 7.1”W x 11.5”D |
| Impedance | 6 ohms | 6 ohms nominal, 3.3 ohms minimum (manufacturer specified) |
| Sensitivity | 82.5dB | 87.1dB (2.83V/1m, measured, Erin’s Audio Corner; 87.9dB manufacturer specified) |
| Drivers | 5.12” woofer, 0.98 in tweeter; 0.75-inch supertweeter; 0.75-inch supertweeter; 0.75-inch supertweeter; 0.75-inch supertweeter | 5” (125mm) C3 mid/bass driver, 1” (25mm) tweeter |
| Weight | 9.5 lbs (4.3 kg) each | 15.4 lbs (7.0 kg) each |
| Woofer Cabinet | ported, rear | rear-ported |
| DIY Kit | No | No |
| Crossover Frequency | - | 2.5kHz (manufacturer specified) |
| Frequency Response | - | 53Hz - 30kHz (-6dB, manufacturer specified) |
| Recommended Power | - | 25W - 100W (manufacturer specified) |
| Spinorama Preference Score | - | 3.63 |
| Spinorama Preference Score with Perfect Sub | - | 6.55 |
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The Two Speakers In Full
Sony SS-CS5 M2: $153.00 per pair Amazon eBay
Older model: the Sony SS-CS5 (ranked higher, rated 3.5/5).
Same family: the Sony SS-CS3 M2 (floorstanding, estimated 3/5) and the Sony SS-CS8 M2 (center, estimated 2.8/5).
Pros: Added internal bracing (corners, sides, front baffle) plus an updated crossover meaningfully reduce the resonance issues that plagued the original SS-CS5, giving a smoother, more neutral character overall. A modest mid-range dip (about 1-2dB) is present but tolerable, and the reviewer would rather have this dip than a peak in that region. Slightly deeper bass than the previous version, measuring about 2dB more output around 60Hz. Distortion drops noticeably when crossed to a subwoofer around 80-120Hz, meaningfully improving midrange clarity and detail versus running full-range. Easy to drive on a standard AVR: no need for a dedicated high-power amplifier. More modern, understated waveguide look compared to the previous version’s glossy trim. Measured bass extension of 80Hz (-3dB).
Cons: Mild sibilance in the 3-5kHz range stands out on S and T sounds in vocals. Some forwardness in the midrange noticeable on certain vocal recordings. Soundstage and sense of envelopment are comparatively flat and two-dimensional, especially next to reference-quality speakers with strong 3D imaging. Marketed as a “three-way” design mainly due to an added super-tweeter that the reviewer considers largely superfluous: it engages only at very high frequencies and adds complexity without a clearly audible benefit, when that cost might have been better spent on the main crossover. Output-limited: realistic ceiling is around the mid-90s dB SPL at a few meters, with comfortable listening closer to 75-85dB at 3-4 meters before distortion and compression become audible. Bass noticeably compresses/shelves below about 120Hz as volume increases, softening kick-drum impact at higher output. Smaller drivers and a lighter motor structure than rivals like the Polk XT20, which the reviewer generally prefers for its better directivity and higher SPL capability. Still needs a subwoofer for any real bass extension.
Full Sony SS-CS5 M2 review and specifications →
| Bass Extension (-10dB) | 54Hz (measured, Erin’s Audio Corner) |
|---|---|
| Bass Extension (-3dB) | 80Hz (measured, Erin’s Audio Corner) |
| DIY Kit | No |
| Dimensions | 13.2”H x 7”W x 8.7”D (335 x 178 x 220 mm) |
| Drivers | 5.12” woofer, 0.98 in tweeter; 0.75-inch supertweeter; 0.75-inch supertweeter; 0.75-inch supertweeter; 0.75-inch supertweeter |
| Impedance | 6 ohms |
| Sensitivity | 82.5dB |
| Weight | 9.5 lbs (4.3 kg) each |
| Woofer Cabinet | ported, rear |
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Q Acoustics 5020: $1,199.00 per pair Amazon eBay
Same family: the Q Acoustics 5010 (smaller bookshelf, ranked higher, estimated 3.5/5), the Q Acoustics 5040 (smaller floorstanding, rated 4.1/5), the Q Acoustics 5050 (larger floorstanding, estimated 4.3/5) and the Q Acoustics 5090 (center, estimated 3.7/5).
Pros: Attractively finished compact standmount with a 5-inch Continuous Curved Cone woofer and carefully engineered cabinet details. Erin found distortion well controlled at normal levels: below 1% down to about 50Hz at 86dB/1m. Its 87dB measured sensitivity is unremarkable rather than hard to drive, and it maintains acceptable output for typical 80-85dB listening. The rear port can be plugged for placement flexibility. Measured bass extension of 103Hz (-3dB), with a measured sensitivity of 87.1dB.
Cons: Erin found the tonal balance distinctly too crisp, forward and treble-heavy: the top end is roughly 3-5dB elevated while the 1-3kHz region is recessed, so vocals change level unnaturally as they move through their range. The shallow woofer crossover and steeper tweeter slope contribute to the off-axis discontinuity, while the port has a strong 1kHz resonance. Bass is limited: Erin measured F3 103Hz and F10 48Hz; at 96dB distortion reaches about 3% by 100Hz, and he bottomed the woofer when pushed hard. He preferred the less-expensive 3020i’s linearity and did not recommend the 5020 for neutral listening without EQ.
Full Q Acoustics 5020 review and specifications →
| Bass Extension (-10dB) | 48Hz (measured, Erin’s Audio Corner) |
|---|---|
| Bass Extension (-3dB) | 103Hz (measured, Erin’s Audio Corner) |
| Crossover Frequency | 2.5kHz (manufacturer specified) |
| DIY Kit | No |
| Dimensions | 11.2”H x 7.1”W x 11.5”D |
| Drivers | 5” (125mm) C3 mid/bass driver, 1” (25mm) tweeter |
| Frequency Response | 53Hz - 30kHz (-6dB, manufacturer specified) |
| Impedance | 6 ohms nominal, 3.3 ohms minimum (manufacturer specified) |
| Recommended Power | 25W - 100W (manufacturer specified) |
| Sensitivity | 87.1dB (2.83V/1m, measured, Erin’s Audio Corner; 87.9dB manufacturer specified) |
| Spinorama Preference Score | 3.63 |
| Spinorama Preference Score with Perfect Sub | 6.55 |
| Weight | 15.4 lbs (7.0 kg) each |
| Woofer Cabinet | rear-ported |
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- Reviews, Comparisons and Sound Samples
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