The Wharfedale Diamond 250 Speakers have bass and mid-range cones fashioned from woven Kevlar and incorporate semi- elliptical ‘break-up’ areas – visible as raised ‘V’ shapes on the cone’s surface – that smooth the response throughout the audible range.The new design improvements inside the Wharfedale Diamond 250 Speakers, enhance the sound quality in comparison to the already highly acclaimed Diamond 100 Series. Bass unit motor systems have been further refined, with corresponding increases in magnet size, making the speakers easier to drive and boosting transient acoustic power.
Furthermore, Wharfedale have taken note of how most users are placing their speakers in their rooms. These days, loudspeakers are often expected to blend into room furnishings rather than take up a significant amount of space. This is particularly true of low-cost speakers like those in the Diamond 200 Series, which are expected to fit seamlessly into average-size living rooms. For this reason, the ability to be positioned close to a rear wall is important.
The balance of the Wharfedale Diamond 250 Speakers takes this into account, with the stand mount speakers having a recommended minimum of 50mm to the rear wall, alongside a minimum of 200mm for the floorstanders – considerably closer positioning than is possible with many similar-sized designs. This freedom of positioning is aided by the Slot-Loaded Distributed Port, again grown out of our research into the Jade Aperiodic bass loading system.While the Diamond 200 Series bass system is strictly bass reflex, with its attendant bonus of high sensitivity, the slot-loaded port, which uses a gap between the plinth and the port exit in the base of the cabinet, aids the pressure differential between the port and the air in the room, increasing the energy transfer and making the system more efficient. Attendant with the increase in bass driver power, Diamond 200 Series speakers now have an added degree of airflow control to the port exit, which effectively reduces turbulence in this region and reduces low-frequency distortion.
The Wharfedale Diamond 250 Speakers dust cap is blended and treated to provide a smooth transition with the treble unit, which incorporates an advanced ferrite magnet system and a carefully constructed waveguide around the fabric dome for optimal dispersion. Bass performance is enhanced by a newly refined version of the Slot-Loaded Distributed Port, first introduced in the outgoing Diamond 100 Series.
Instead of the usual circular reflex port, all Diamond 200 Series models incorporate a port that exits at the base of the speaker cabinet, loaded by a slot that is created by the plinth. This equalises the air pressure to mimic that inside the cabinet, allowing smooth transition between the pressure variation in the cabinet and the low frequency sound developed in the room.
The result is deep, articulate and well-integrated bass, without the ‘chuffing’ that is often associated with regular front- or rear-mounted ports. No other speaker range at such affordable price points implements an advanced bass loading system of this kind. The Wharfedale Diamond 250 Speakers come in a choice of four finishes – black, walnut and rosewood (White is a special order) - adding to their smart aesthetics and excellent value for money.