KEF Concord IV Floor Standing Loudspeakers in FWO/ VGC
KEF Concord IV is a free-<strong>stand<strong>instrong>gstrong> loudspeaker system <strong>instrong>corporat<strong>instrong>g many features result<strong>instrong>g from KEF’s programme of advanced research and development. Concord IV offers precise and stable stereo reproduction for the serious listener together with ample volume for the most extreme domestic use. A maximum acoustic output of 107dB spl can be obta<strong>instrong>ed on programme peaks. Concord IV Features: High power handl<strong>instrong>g capacity: 100 watts per channel. High acoustic output: 107dB spl on programme peaks. For use with amplifiers of more than 10 watts per channel. <strong>Instrong>terchangeable grille covers <strong>instrong> black, brown, beige, blue, red green or grey to suit your decor. Concord IV Specifications Frequency range: - 60Hz to 20kHz ± 3dB at 2m on reference axis (-10dB at 40Hz and 25kHz); Directional characteristics: - Horizontal: with<strong>instrong> ± 2dB of axial response up to 10kHz for ± 20º - Vertical: with<strong>instrong> ± 2dB of axial response up to 20kHz for ± 5º; Maximum output: - 107dB spl on programme peaks under typical listen<strong>instrong>g conditions; Character sensitivity level: - 87dB spl at 1m on measur<strong>instrong>g axis for p<strong>instrong>k noise <strong>instrong>put of 1W; Distortion: - Second harmonic: less than 2% from 20Hz to 80Hz, less than 1% from 80Hz to 20kHz; Third harmonic: less than 1% from 20Hz to 20kHz; Measured at 1m on measur<strong>instrong>g axis at mean spl of 90dB, anechoic conditions Enclosure type: - Closed box Programme rat<strong>instrong>g: - 100W Maximum cont<strong>instrong>uous s<strong>instrong>usoidal <strong>instrong>put 28V rms from 60Hz to 2kHz reduc<strong>instrong>g 10Vrms from 2.5kHz to 20kHz M<strong>instrong>imum amplifier requirement: - 10W Nom<strong>instrong>al impedance: - 8 ohms Resonance frequency: - 68Hz Total system Q: - 0.8 Dimensions: - 692 x 280 x 315 mm Weight: - 12.7kg (28lb) <strong>Instrong>ternal volume: - 38 litres Concord IV Benefits The addition of quality <strong>loudspeakersstrong> to an exist<strong>instrong>g rack system or music centre - or even a portable radio - will dramatically improve sound quality. As loudspeaker specialists, KEF concentrate on the design and production of high fidelity <strong>loudspeakersstrong>, and have employed the latest computer aided analysis techniques to develop Concord IV. With and amplifier output of as little as 10 watts per channel, Concorde IV will produce more than enough volume to fill a generous sized room. With larger amplifiers, considerably louder volume levels can be achieved whilst ma<strong>instrong>ta<strong>instrong><strong>instrong>g realistic tonal quality. Concord IV is a medium-sized (38 litres) loudspeaker system comb<strong>instrong><strong>instrong>g a 25mm soft dome tweeter with two 200mm bass units to give extended bass performance down to 40Hz. The two identical bass units are arranged to work together over the lower part of the frequency range ensur<strong>instrong>g reduced distortion and remarkable power handl<strong>instrong>g capability. To obta<strong>instrong> an even distribution of sound a new filter system progressively reduces the output of the lower bass unit above 200Hz. At crossover frequency only one bass unit is operat<strong>instrong>g with the tweeter. To allow the sound to reach the listener directly without troublesome reflections from walls, <strong>floorstrong> ceil<strong>instrong>g the drive units are arranged with<strong>instrong> the enclosure so that the full frequency response is enjoyed when the <strong>loudspeakersstrong> are positioned between 9” and 12” from the <strong>floorstrong>. Happy to demonstrate