Fyne Audio F501SP Floorstanding Speaker

The F501SP is the mid-range floorstander in Fyne Audio's F500 Special Production series — a UK-built 2.5-way design that adds a dedicated 150mm bass driver below the IsoFlare unit to extend low-frequency reach and increase output capability beyond what the F500SP standmount can achieve. Frequency response extends to 36Hz, sensitivity is 91dB, and it handles up to 180W RMS. The F500 SP concept brings driver and crossover engineering from the F700 and F1 series into a more accessible cabinet format, tuned by Technical Director Dr Paul Mills and hand-built at Fyne's Scottish factory. For listeners who want the IsoFlare point-source midrange and treble from the SP series but need more bass weight and dynamic headroom, the F501SP is the natural step up from the standmount.

The F500 SP — Special Production Series

The Special Production concept distils engineering from Fyne Audio's high-end series into more accessible loudspeaker designs. Designed and tuned by Dr Paul Mills and hand-built at Fyne's UK factory, the F500 SP series brings driver, crossover, and bass tuning expertise from the F700 and F1 ranges into the more compact F500 series cabinet format. The F501SP takes that architecture and puts it into a floorstanding enclosure, sitting on an anodised machined aluminium plinth with diamond machine-cut detailing on the aluminium driver chassis. Four finish options are available: Natural Walnut, Piano Gloss Walnut, Piano Gloss Black, and Piano Gloss White.

IsoFlare Driver Technology

The IsoFlare driver places the bass/midrange cone and the high-frequency compression tweeter on a shared axis — the tweeter fires from the centre of the cone — so both drivers radiate sound from a single point in space. This point-source behaviour keeps the time relationship between frequencies consistent across the listening area, and off-axis performance is substantially better than a conventional arrangement where the tweeter sits physically above the bass/midrange unit.

In the F501SP, the IsoFlare driver is a 150mm multi-fibre cone with a FyneFlute roll surround, paired with a 25mm magnesium dome compression driver with neodymium magnet system. Below the IsoFlare unit sits a second 150mm multi-fibre bass driver with a FyneFlute surround, crossing over at 250Hz, which allows the IsoFlare unit to operate across a narrower, more controlled band — reducing distortion and improving dynamic composure at higher listening levels.

BassTrax and Port System

The F501SP uses a downfiring port with a BassTrax Tractrix diffuser built into the aluminium plinth. The Tractrix profile reduces reflections as bass energy leaves the port and smooths its integration into the room. The practical result is a floorstander that is less sensitive to floor-boundary effects and easier to position than most rear-ported designs — the 36Hz extension is achieved with less placement compromise than a conventional cabinet of comparable size.

Cinema Use

The F501SP pairs naturally with the Fyne Audio F57SP-6 centre channel speaker, which uses the same IsoFlare driver and crossover frequencies. Running matched IsoFlare drivers across the front three channels gives consistent timbre from left to centre to right — which matters considerably more in a cinema context than most listeners realise until they hear it done properly.

Technical Specifications

Who Is It For?

The F501SP suits a listener who wants a full-range floorstander built around serious driver engineering, in a room where both music and cinema matter. The 91dB sensitivity and 8Ω load are straightforward for most integrated amplifiers — 30 watts is a realistic minimum, and the 180W upper limit gives headroom for larger rooms and more powerful amplification. For buyers who have heard the F500SP and want more bass extension and output, the F501SP is the direct next step. Those building a home cinema system should also consider the F502SP for even greater bass authority with its 200mm IsoFlare and 30Hz extension.

For those ready to step into the F700 series, the F702 introduces twin-cavity loading and the full F700 cabinet engineering. The F704SP represents the top of the SP range, and the F1-5 is the entry point into the flagship F1 series for those whose budgets allow the step further still.

Buying from Martins Hi-Fi

Martins Hi-Fi has been in Norwich since 1968. Elizabeth Gould runs the business today, and we stock only brands we have heard properly and stand behind. The F501SP is available to hear in our Norwich showroom — call ahead and we will have it set up for you. Dave and Chris can advise on system pairing, room matching, and whether the F501SP or the F500SP standmount is the right choice for your space.

Contact us at info@martinshifi.co.uk, call 01603 627010, or WhatsApp on 07554 687137. You can read more about how we work on our Why Martins Hi-Fi page. We are at 85–91 Ber Street, Norwich, NR1 3EY.