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The KEF PSW2500 is a compact powered active subwoofer built around a 250 mm ultra long-throw bass driver and a 250-watt amplifier in a sealed enclosure. Aimed at enthusiasts looking for capable low-frequency support at a competitive price, it adds depth and weight without overwhelming a well-balanced system.
This pre-owned unit is in great condition in silver, supplied as-is with no accessories and no original packaging.
With useful extension down to the low-20s and a maximum output of 108 dB, the PSW2500 is well suited to music and movie playback in medium-sized rooms, delivering taut, articulate bass rather than boom.
Visit our Lane Cove showroom to hear how the PSW2500 sub underpins a system with controlled, musical low frequencies.
Why Choose the KEF PSW2500 Subwoofer?
The PSW2500 is a sealed, magnetically shielded compact active sub designed to add authority and depth while remaining easy to place and integrate.
• Controlled Sealed-Box Bass: Closed enclosure and long-throw driver favour tightness and definition over one-note rumble.
• Dedicated 250 W Amplification: On-board power keeps the main amplifier free for midrange and treble duties.
• Useful System Flexibility: Movie/Music modes, variable low-pass behaviour and filtered outputs simplify matching.
• Compact, Shielded Cabinet: Relatively modest footprint and magnetic shielding aid placement near screens or furniture.
• Competitive High-Value Performance: Genuine KEF engineering at a pre-owned price that makes serious bass more accessible.
Audition the KEF PSW2500 at our Lane Cove showroom to assess its integration, extension and control with a pair of main speakers.
The sealed 17-litre cabinet and ultra long-throw 250 mm driver give the PSW2500 a character that suits both stereo music and film soundtracks.
Frequency coverage from 15 Hz to 140 Hz (with a typical ±3 dB window around 30 Hz–150 Hz) provides genuine low-end support without the port noise sometimes associated with compact vented designs.
Low-level RCA inputs and actively filtered RCA outputs (12 dB/octave at 130 Hz) make it straightforward to insert the sub into an existing chain.
Combined with switchable Movie/Music voicing, the KEF PSW2500 can be tuned for impact or for a more even musical foundation—an appealing option for listeners seeking capable bass at a competitive price.
Technical Specifications
• Product Type: Pre-owned
• Type: Powered/active subwoofer, sealed-box enclosure
• Drive Unit: 1 × 250 mm (10 in) ultra long-throw bass driver
• Amplifier Power: 250 W built-in
• Frequency Range: 15 Hz – 140 Hz
• Frequency Response: Typically 30 Hz – 150 Hz (±3 dB)
• Maximum Output (SPL): 108 dB
• Internal Volume: 17 litres
• Magnetic Shielding: Yes
• Inputs: Low-level RCA
• Outputs: Filtered low-level RCA (12 dB/octave at 130 Hz)
• Operating Modes: Switchable Movie / Music
• Power Requirements: 115 V AC or 230 V AC
• Power Consumption: 220 VA
• Dimensions (H × W × D): 360 × 495 × 325 mm
• Weight: 14.5 kg
• Finish: Silver
Learn more about the KEF PSW2500 on HiFi Engine here.
Let us show you the remarkable PSW2500 sub at Len Wallis Audio. Explore our second-hand hi-fi & AV collection here or contact our team to audition the PSW2500 at our Lane Cove showroom or enquire online.
Len Wallis Audio Excellence Promise
Since 1978, Len Wallis Audio has been a trusted name in hi-fi, curating premium audio solutions from our Lane Cove showroom in Sydney. For over four decades, we’ve selected products that deliver outstanding performance and quality.
Our focus on innovation ensures every item meets audiophile standards. Whether upgrading or building a new system, our team helps you find the ideal audio solution for your needs.
Experience the PSW2500 in person with an audition at our Lane Cove showroom. With expert guidance and a commitment to satisfaction, we make your audio journey seamless and rewarding.
Ready for compact, controlled bass with the KEF PSW2500 Subwoofer?
Call (02) 9427 6755
Email [email protected]
Or visit us at 64 Burns Bay Road, Lane Cove, NSW, 2066
Is this priced like a smart buy, or are you paying too much for a competent older sub? At A$590, it sits well above the A$471 75th percentile and is firmly ambitious versus the recent used market, where the median is A$353 and the 25th percentile is A$331. That doesn’t make it a bad sub, but it does mean the asking price needs strong condition, proof of proper operation, or extras to justify itself.
The upside is that KEF’s PSW series is generally well regarded for clean, musical bass rather than boom, so a tidy example can still be appealing for a two-channel or home-theater setup. If it’s genuinely well cared for and fully functional, you’re buying something that can still do a respectable job; just be sure the amplifier, driver, and auto-on behavior are all solid, because at this price you want a no-surprises unit.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
KEF traces its roots to 1961, when British engineer Raymond Cooke founded the company in a modest Nissen hut on the grounds of the Kent Engineering and Foundry in Maidstone, England. A former BBC engineer and Wharfedale veteran, Cooke was driven by a passion for music and a commitment to technological innovation, aiming to reproduce sound as faithfully as the original performance. From its inception, KEF pioneered materials like foil-stiffened polystyrene diaphragms and Melinex tweeters in its debut K1 loudspeaker, setting a benchmark for engineering precision that propelled the brand to early acclaim.
KEF has long specialized in loudspeakers, establishing itself as a leader with iconic innovations such as the Uni-Q coaxial driver and computer-aided design techniques that revolutionized driver and enclosure development. While drive units supplied to other manufacturers fueled its growth, the brand's core output remains high-fidelity speakers across categories like floorstanders, bookshelves, and home theater systems, including early THX-approved setups. Active wireless models and reference-grade series extend its portfolio, though it eschews amplifiers, turntables, DACs, headphones, or cables.
Renowned for its science-driven heritage, KEF occupies a premium position in the hi-fi market, blending accessible high-end performance with cutting-edge technology. Collectors prize vintage BBC monitors and Bextrene-driver classics, while modern buyers seek its precise, natural soundstaging. Decades of awards affirm KEF's status as a respected innovator, appealing to discerning audiophiles who value engineering over hype.
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