The Cantor III
Cantor III is a compact 2-way loudspeaker system incorporating a passive bass radiator to extend low frequency response. Construction and drive units complement resemble that of Chorale III from which it is derived. Styling is simple and restrained with smart front baffle graphics, matching contemporary trends in decor for those who prefer to listen with the grille removed.
Cantor III is intended for those applications which demand small unobtrusive loudspeakers without sacrifice of musical quality or restriction of frequency range.
Optimisation of parameters in the acoustic circuit comprising low frequency driver, passive bass radiator and enclosure extends useful bass output below 50Hz. Frequency response is nominally flat to 70Hz when Cantor III stands clear of room walls. Placing the speakers against a wall will extend the response flat down to 60Hz. Better stereo images will always be perceived however, when the loudspeaker is mounted on stands clear of large flat surfaces. This is because sound diffracted to the rear of the loudspeakers helps to create a more natural, airy effect and an impression of depth due to images formed behind the loudspeakers, unconfused by reflections from a wall.
Its efficiency is medium to high at 87dB/W/m and it will safely handle power from a 60W amplifier without distortion or damage under audiophile (see over) operating conditions. The optimum balance of performance, size and power requirement proves once again the importance of KEF’s engineering approach to loudspeaker design and manufacture.
Cabinet work is finished in top quality simulated walnut with brown textile grille.
Cantor III Specifications
| Frequency Range | 58Hz to 20kHz ± 3dB at 2m on reference axis ( -10dB at 43Hz and 30kHz) |
| Directional characteristics within 2dB of response on reference axis | up to 20kHz for ± 5º vertically up to 12kHz for ± 20º horizontally |
| Maximum Output | 107dB spl on programme peaks under typical listening conditions |
| Characteristic Sensitivity Level | 87dB spl at 1m on reference axis for pink noise input of 1W |
| Distortion Measured at 1m on reference axis at man spl of 90dB, anechoic conditions |
Second harmonic: less than 1% from 90Hz to 20kHz Third harmonic: less than 1% from 40Hz to 20kHz |
| Enclosure Type | Mechanical reflex |
| Internal Volume | 17 litres |
| Nominal Impedance | 8 ohms |
| Maximum amplifier power: |
normal 80W, audiophile 100W |
| Minimum amplifier power: | normal 10W |
| Weight | 6.8kg |
| Weight | 7.75kg (17.15lb) |
| Dimensions | 502 (h) x 247 (w) x 212mm (d) mm |