The KEF Q150 ranks #23 out of 63 total Medium Size Bookshelf Speakers for sound quality. See Top Recommended Speakers By Attribute for all the top speaker suggestions.

Brand: KEF

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KEF Q150 - ranked #23 of 63 Medium Size Bookshelf Speakers · Editor's rating 3.7/5

Check price at Amazon ($350 Discontinued) →

#23 KEF Q150: $350 Discontinued Amazon eBay

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.

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.

How it compares: Just above it: Tekton Troubadour - $650 more, 3Hz higher bass extension (-3dB). Just below it: Parts Express C-Note - $250 cheaper, 2Hz lower bass extension (-3dB).

Bass Extension (-10dB)	44Hz (measured, Erin's Audio Corner)
Bass Extension (-3dB)	51Hz (measured, Erin's Audio Corner)
Dimensions	11.9"H x 7.1"W x 10.9"D (303 x 180 x 278 mm)
Discontinued	Yes
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)
Weight	12.3 lbs / 5.6 kg each
Woofer Cabinet	ported, rear

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