Short answer: the Monitor Audio Silver 50 7G. It ranks #14 of [92 bookshelf speakers](/passive/bookshelf-medium/#monitor-audio-silver-50-0 lbs (7 g)) by sound quality (rated 4.2/5) at $799 and is still sold new; the KEF Q150 ranks #26 (rated 3.7/5) and is discontinued, so it is only an option used.
Buy the Monitor Audio Silver 50 7G. It is rated higher for sound quality, and the KEF Q150 is discontinued, so it is only available used.
Looking for alternatives? See the complete Passive Home rankings.
Specifications Side By Side
| Monitor Audio Silver 50 7G | KEF Q150 | |
|---|---|---|
| Price | $799 per pair | $350 per pair Discontinued |
| Ranked | #14 of 92 in Medium Size Bookshelf Speakers | #26 of 92 in Medium Size Bookshelf Speakers |
| Enclosure | ported | - |
| Drivers | 1” C-CAM Gold Dome tweeter, 5.25” C-CAM RST II mid bass driver | 130mm (5.25”) aluminium Uni-Q woofer, 25mm (1”) vented aluminium dome tweeter |
| Dimensions | 11.1”H x 6.5”W x 10.7”D (282 x 165 x 272 mm) | 11.9”H x 7.1”W x 10.9”D (303 x 180 x 278 mm) |
| Weight | 12.3 lbs (5.6 kg) each | 12.3 lbs (5.6 kg) each |
| Sensitivity | 86dB @ 2.83V/1m | ~85dB (300Hz-3kHz on-axis, measured, Erin’s Audio Corner) |
| Impedance | 8 ohms nominal, 3.9 ohms minimum | 8 ohms nominal, about 4.7 ohms minimum (measured, Erin’s Audio Corner) |
| Bass Extension (-3dB) | 87.9Hz (measured, Erin’s Audio Corner) | 51Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-10dB) | 50.7Hz (measured, Erin’s Audio Corner) | 44Hz (measured, Erin’s Audio Corner) |
| Crossover Frequency | 2.6kHz | - |
| Port Tuning | 58Hz | - |
| Power Handling | 100W RMS handling, 40-100W recommended amplifier power | - |
| Warranty | Lifetime, parts and labor | - |
| Country | China | - |
| Maximum SPL | 104dB (manufacturer specified) | - |
| Spinorama Preference Score | 5.40 | 4.86 |
| Spinorama Preference Score with Perfect Sub | 8.01 | 7.06 |
| DIY Kit | No | No |
| Woofer Cabinet | - | ported, rear |
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Prices on this page were last checked October 3, 2026 at 10:26 PM 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
Monitor Audio Silver 50 7G: $799 per pair Crutchfield eBay
Pros: The 7th generation C-CAM Gold Dome tweeter with UD Waveguide II and RST II mid bass driver produce a listening window smoothness score of 0.50 at an accessible price, earning a Hi-Fi News Outstanding Product Award. A HiVe II reflex port system is tuned to 58Hz for real bass weight from a compact 5.25 inch two way. Measured bass extension of 87.9Hz (-3dB).
Cons: The on axis response trends noticeably upward toward the treble (rising about 0.5dB per octave, a steep tilt), which can read as bright on already bright recordings. Off axis sound also tracks the on axis response less consistently than most speakers here. Bass extension is limited to a measured 87.9Hz at -3dB, so a subwoofer is recommended for full range use, and minimum impedance dips to 3.9 ohms at 250Hz.
Full Monitor Audio Silver 50 7G review and specifications →
| Bass Extension (-10dB) | 50.7Hz (measured, Erin’s Audio Corner) |
|---|---|
| Bass Extension (-3dB) | 87.9Hz (measured, Erin’s Audio Corner) |
| Country | China |
| Crossover Frequency | 2.6kHz |
| DIY Kit | No |
| Dimensions | 11.1”H x 6.5”W x 10.7”D (282 x 165 x 272 mm) |
| Drivers | 1” C-CAM Gold Dome tweeter, 5.25” C-CAM RST II mid bass driver |
| Enclosure | ported |
| Impedance | 8 ohms nominal, 3.9 ohms minimum |
| Maximum SPL | 104dB (manufacturer specified) |
| Port Tuning | 58Hz |
| Power Handling | 100W RMS handling, 40-100W recommended amplifier power |
| Sensitivity | 86dB @ 2.83V/1m |
| Spinorama Preference Score | 5.40 |
| Spinorama Preference Score with Perfect Sub | 8.01 |
| Warranty | Lifetime, parts and labor |
| Weight | 12.3 lbs (5.6 kg) each |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
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KEF Q150: $350 per pair Discontinued Amazon eBay
Newer model: the KEF Q1 Meta, ranked lower, rated 3.6/5.
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