The sound performance from our compact stand mounted loudspeaker will redefine your expectations of what is possible. With the clarity and dynamics of our other Reference loudspeakers and awesome bass power that belies its size, customers with limited space need look no further. "First noted was the detail and speed of sound"- Janine Elliot Key Features Tuned Mass Technology™ 360˚ Bass Diffuser Acuflex™ Technology Musical Obsession Compact perhaps but bursting with technology from our other models. Featuring our Tuned Mass Technology (TMT™) Damper to eliminate harmful vibrations, metal constructed cabinet for sensational clarity and our Bass Diffuser enhancing port air flow. It all adds up to a loudspeaker that ticks every box, a flawlessly sounding one too. "The detail in this speaker is really phenomenal"- Sander van der Heide clarity of sound Channelling unwanted vibration that you normally feel in the loudspeaker cabinet to our Tuned Mass Technology (TMT™) damping element ensures that everything, especially the cone itself remains free of colouration and the sound remains pure and smooth. Reflex loading optimises low frequency performance and our tuned port fires below the cabinet onto our 360° conical diffusing plate minimising location issues and producing a wonderful unfatiguing clarity of sound. "If you are serious about your music you should seriously consider the Reference Four"- Janine Elliot Specifications HF DRIVER: 1x 28mm (Titanium Voice Coil Former) MF/LF DRIVER: 1x 160mm (75mm Titanium Voice Coil Former) FREQUENCY RESPONSE: 30Hz - 22KHz ±3dB SENSITIVITY: 88dB @2.83V/1m RECOMMENDED POWER: 40 - 300W IMPEDANCE: 6.5Ω CROSSOVER TOPOLOGY: 2 WAY, 2ND ORDER CABINET CONSTRUCTION: ALUMINIUM PLATE. ALL INTERNAL VOLUMES SEALED WITH O-RING GASKETS DIMENSIONS: (CABINET) 367 x 210 x 440 (HXWXD)(OVERALL) 995 x 230 x 440 (HXWXD) FINISHES: (CABINET) BLACK(SPACERS) BLACK, RED OR COPPER NET WEIGHT: (LOUDSPEAKER) 25 KG(INC.STAND) 40 KG