The Concord IV
KEF Concord IV is a free-standing loudspeaker system incorporating many features resulting 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 obtained on programme peaks.
Concord IV Features:
- High power handling capacity: 100 watts per channel.
- High acoustic output: 107dB spl on programme peaks.
- For use with amplifiers of more than 10 watts per channel.
Interchangeable grille covers in 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: within ± 2dB of axial response up to 10kHz for ± 20º Vertical: within ± 2dB of axial response up to 20kHz for ± 5º |
| Maximum output | 107dB spl on programme peaks under typical listening conditions |
| Character sensitivity level | 87dB spl at 1m on measuring axis for pink noise input 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 measuring axis at mean spl of 90dB, anechoic conditions |
| Enclosure type | Closed box |
| Programme rating | 100W |
| Maximum continuous sinusoidal input | 28V rms from 60Hz to 2kHz reducing 10Vrms from 2.5kHz to 20kHz |
| Minimum amplifier requirements | 10W |
| Nominal impedance | 8 ohms |
| Resonance frequency | 68Hz |
| Total system Q | 0.8 |
| Dimensions | 692 x 280 x 315 mm |
| Weight | 12.7kg (28lb) |
| Internal volume | 38 litres |
| Finishes | Choice of black or brown plinth and top with black or brown grille fabric as appropriate. Beige, blue, red, green or grey grille covers available as optional accessories. |
Concord IV Benefits
The addition of quality loudspeakers to an existing 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 loudspeakers, 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 maintaining realistic tonal quality.
Concord IV is a medium-sized (38 litres) loudspeaker system combining 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 ensuring reduced distortion and remarkable power handling capability.
To obtain 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 operating with the tweeter.
To allow the sound to reach the listener directly without troublesome reflections from walls, floor ceiling the drive units are arranged within the enclosure so that the full frequency response is enjoyed when the loudspeakers are positioned between 9” and 12” from the floor.
Optional stands, the ULS 40 and 60, allow the speaker to be conveniently and elegantly positioned.
Concord IV can be easily matched to any home decor scheme with the moulded base and top available in either brown or black. In addition, interchangeable grille sleeves are supplied in a choice of seven colours.