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IMF ALS40 mkII Floorstanding Loudspeakers ALS. Advanced Line System, closed box, no vents but still Transmission Line technology, hallmark of IMF speakers, perhaps where it all started from. This set has white surround on the upper bass unit. Mid driver has had its surrounds replaced, with no other modifications or intervention. Key Specifications: Frequency Response: 30Hz – 20kHz Power Handling: 50W – 100W (RMS) Impedance: 8 ohms Sensitivity: 89dB at 1 watt/1 meter Drivers: Two 8" (200mm) bass drivers for extended, punchy low frequencies 4" (100mm) midrange driver for detailed vocal clar
Compared with a decent pair of alternatives at this level, A$1,400 is clearly above the recent used market here: it sits well over the A$1,075 75th percentile and far above the A$502 median, so I’d call it ambitious rather than fair. Unless this is unusually fresh, complete, or locally scarce, the asking price is asking for a premium that the comparable AUD data doesn’t really support.
That said, these are respected floorstanders with a strong reputation for scale, image, and lively dynamics when set up properly, so the upside is real if the pair is genuinely clean and original. If the cabinets, drivers, and grilles are all intact and the seller can confirm no driver fatigue, crossover issues, or repairs, it’s still a worthwhile listen — just one where the premium should be justified by condition and provenance rather than the model name alone.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
IMF is a classic British hi-fi name founded in 1961, originally tied to Irving M. “Bud” Fried, a transmission-line loudspeaker advocate whose initials gave the brand its name. The trademark was registered at the suggestion of Saul Marantz, and the company became associated with advanced audio reproduction rather than a broad consumer-electronics lineup. Its strongest historical identity is rooted in the UK speaker scene, with a transatlantic connection to the American market.
IMF is primarily known for loudspeakers, especially its transmission-line designs such as the Reference Standard and other monitor-style models. The brand name has also appeared in connection with a wider range of audio components in its early history, including cartridges, tonearms, amplifiers, and other supporting hardware, but speakers are the core of the IMF story. It is not generally known as a maker of modern DACs, headphones, or cables.
In the market, IMF sits firmly in the vintage-collector and enthusiast category rather than mainstream mass market. Its reputation rests on engineering credibility, large-scale monitor speakers, and a distinctive sound that appeals to serious hi-fi buyers and restoration-minded collectors. For today’s shopper, IMF is best understood as a niche heritage brand with historical importance, not a current broad-line audio manufacturer.
See all IMF listings on RADAR.
