Short answer: the Carmody S2000. It ranks #29 of 160 bookshelf speakers by sound quality (rated 4.0/5) at $251.06 and is still sold new; the KEF Q150 ranks #49 (rated 3.7/5) and is discontinued, so it is only an option used. The KEF Q150’s replacement, the KEF Q1 Meta, is rated 3.6/5.
The KEF Q150 is the deeper-bass option. Two-way coaxial (Uni-Q) design with a 1” dome tweeter and 5.25” mid-range time-aligned in a single driver assembly, available in ported or sealed configuration. Its bass reaches about 51Hz before falling 3dB, against 64.5Hz for the Carmody S2000. The tradeoff: A high-frequency lift in the estimated in-room response makes it sound noticeably brighter in an untreated room than in a heavily acoustically-treated one: a real preference factor depending on your room’s furnishings.
What the Carmody S2000 does well: CEA2034 spinorama shows good response between 100Hz and 3kHz with low room dependency thanks to smooth early-window reflections, plus reasonably wide horizontal beamwidth and directivity. Watch for: Energy falls off above 3kHz with a resonance around 11kHz, and directivity errors show up around the 4-5kHz crossover region.
Buy the Carmody S2000. It is rated higher for sound quality; the KEF Q150 is no longer sold new.
Looking for alternatives? See the complete Passive Home rankings.
Specifications Side By Side
| KEF Q150 | Carmody S2000 | |
|---|---|---|
| Price | $350 per pair Discontinued | $251.06 per pair |
| Ranked | #49 of 160 in Medium Size Bookshelf Speakers | #29 of 160 in Medium Size Bookshelf Speakers |
| Bass Extension (-10dB) | 44Hz (measured, Erin’s Audio Corner) | 49.8Hz (derived, log-interpolated between spinorama.org -9dB/-12dB points) |
| Bass Extension (-3dB) | 51Hz (measured, Erin’s Audio Corner) | 64.5Hz (measured, Audio Science Review) |
| Dimensions | 11.9”H x 7.1”W x 10.9”D (303 x 180 x 278 mm) | 6” x 15” x 9” (152 x 381 x 229 mm) |
| Impedance | 8 ohms nominal, about 4.7 ohms minimum (measured, Erin’s Audio Corner) | below 4 ohms minimum |
| Sensitivity | ~85dB (300Hz-3kHz on-axis, measured, Erin’s Audio Corner) | 84dB (measured, Audio Science Review) |
| Drivers | 130mm (5.25”) aluminium Uni-Q woofer, 25mm (1”) vented aluminium dome tweeter | small woofer + tweeter, 3kHz crossover (DIY kit) |
| Weight | 12.3 lbs (5.6 kg) each | 11 lbs (5.0 kg) |
| Woofer Cabinet | ported, rear | Baltic Birch plywood |
| Spinorama Preference Score | 4.86 | 4.42 (spinorama.org) |
| Spinorama Preference Score with Perfect Sub | 7.06 | 6.89 (spinorama.org) |
| DIY Kit | No | Yes |
| Frequency Response | - | 50Hz - 20kHz (+/-5.9dB); 80Hz - 20kHz (+/-4.1dB) (measured, Audio Science Review) |
Related Speaker Comparisons
More top alternatives to Carmody S2000:
- KEF LS50 Meta vs Carmody S2000
- Carmody S2000 vs Wharfedale Diamond 12.1
- Carmody S2000 vs Monoprice Monolith THX Compact Satellite
- KEF Q150 vs Emotiva B1+
- KEF Q150 vs JBL Control 1 Pro
Prices on this page were last checked October 9, 2026 at 8:01 AM UTC. Product prices and availability are accurate as of that date/time 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.
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The Two Speakers In Full
KEF Q150: $350 per pair Discontinued Amazon eBay
Newer model: the KEF Q1 Meta, ranked lower, rated 3.6/5.
Older model: the KEF Q100 (ranked lower, rated 2.4/5).
Same family: the KEF Q350 (larger bookshelf, rated 3/5), the KEF Q250c (smaller center, rated 3.9/5) and the KEF Q650c (larger center, rated 3.7/5).
Pros: Two-way coaxial (Uni-Q) design with a 1” dome tweeter and 5.25” mid-range time-aligned in a single driver assembly, available in ported or sealed configuration. Exceptional soundstage depth, a hallmark of KEF’s coaxial designs that the reviewer says few other speakers match. Bass extension reaches into kick-drum territory, respectable for a compact bookshelf speaker. Resonances present in measurements are consistent across on- and off-axis readings, meaning they can be effectively corrected with EQ. Distortion profile is essentially the same whether run sealed or ported, since a subwoofer crossover point sits above where the differences would matter anyway. At its sale price (around $300, sometimes seen at $400), the reviewer considers it a clear step up from his previous budget favorite in this range, the Emotiva B1+, mainly due to the superior soundstage depth. Measured bass extension of 51Hz (-3dB), with a measured sensitivity of 85dB.
Cons: A high-frequency lift in the estimated in-room response makes it sound noticeably brighter in an untreated room than in a heavily acoustically-treated one: a real preference factor depending on your room’s furnishings. A mild dip in the 1-2kHz region reduces vocal fullness somewhat. Unexplained resonances appear in measurements and persist in both sealed and ported configurations, pointing to enclosure or panel vibration rather than the port. Horizontal radiation is narrower than the reviewer generally prefers from KEF’s lineup, with directivity that widens somewhat around 1.2kHz (near a resonance) and again above about 5kHz. Compression testing at high output (102dB) shows significant nonlinearity, especially at lower frequencies: noticeably worse than a comparable Arendal bookshelf speaker costing over twice as much, which held up better until 80Hz. Not intended for loud listening without a subwoofer: the woofer will over-exert itself without a high-pass filter, and the reviewer recommends crossing over at 80-120Hz. At full retail price (around $600/pair), the value proposition is far less certain than at sale pricing. Discontinued.
Full KEF Q150 review and specifications →
| Bass Extension (-10dB) | 44Hz (measured, Erin’s Audio Corner) |
|---|---|
| Bass Extension (-3dB) | 51Hz (measured, Erin’s Audio Corner) |
| DIY Kit | No |
| Dimensions | 11.9”H x 7.1”W x 10.9”D (303 x 180 x 278 mm) |
| Drivers | 130mm (5.25”) aluminium Uni-Q woofer, 25mm (1”) vented aluminium dome tweeter |
| Impedance | 8 ohms nominal, about 4.7 ohms minimum (measured, Erin’s Audio Corner) |
| Sensitivity | ~85dB (300Hz-3kHz on-axis, measured, Erin’s Audio Corner) |
| Spinorama Preference Score | 4.86 |
| Spinorama Preference Score with Perfect Sub | 7.06 |
| Weight | 12.3 lbs (5.6 kg) each |
| Woofer Cabinet | ported, rear |
- Links
- Reviews, Comparisons and Sound Samples
- Erin’s Audio Corner: Kef’s Cheapest Bookshelf. Is the Q150 worth your money? More from Erin’s Audio Corner →
- Erin’s Audio Corner Website KEF Q150
- GR-Research: KEF Q150… can it get any BETTER? More from GR-Research →
- Erin’s Audio Corner: 5 AWESOME SPEAKERS Under $1000 You Won’t Regret
- Erin’s Audio Corner: Budget Stereo Systems You Will Love
- Erin’s Audio Corner Measurements (spinorama.org)
- Head-to-Head Comparisons
Carmody S2000: $251.06 per pair Cinergy Audio eBay
Pros: CEA2034 spinorama shows good response between 100Hz and 3kHz with low room dependency thanks to smooth early-window reflections, plus reasonably wide horizontal beamwidth and directivity. A DIY kit built around a small woofer and tweeter with a 3kHz crossover, priced around $126 per pair before assembly labor. Measured bass extension of 64.5Hz (-3dB), with a measured sensitivity of 84dB.
Cons: Energy falls off above 3kHz with a resonance around 11kHz, and directivity errors show up around the 4-5kHz crossover region. Low 84dB efficiency and an impedance that dips below 4 ohms both call for a capable amplifier. Vertical listening angle is sensitive: move off axis and you fall into a response “ditch” that loses energy.
Full Carmody S2000 review and specifications →
| Bass Extension (-10dB) | 49.8Hz (derived, log-interpolated between spinorama.org -9dB/-12dB points) |
|---|---|
| Bass Extension (-3dB) | 64.5Hz (measured, Audio Science Review) |
| DIY Kit | Yes |
| Dimensions | 6” x 15” x 9” (152 x 381 x 229 mm) |
| Drivers | small woofer + tweeter, 3kHz crossover (DIY kit) |
| Frequency Response | 50Hz - 20kHz (+/-5.9dB); 80Hz - 20kHz (+/-4.1dB) (measured, Audio Science Review) |
| Impedance | below 4 ohms minimum |
| Sensitivity | 84dB (measured, Audio Science Review) |
| Spinorama Preference Score | 4.42 (spinorama.org) |
| Spinorama Preference Score with Perfect Sub | 6.89 (spinorama.org) |
| Weight | 11 lbs (5.0 kg) |
| Woofer Cabinet | Baltic Birch plywood |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons