Loudspeakers

While it's not uncommon for planar-type tweeters to suffer high distortion and complex resonances, FinkTeam's pleated AMT driver (operating above 2.2kHz in the KIM) is exceptionally 'clean' – the CSD waterfall showing only minor modes at 10-20kHz [Graph 2, below] while distortion is typically <0.5% from 3-20kHz (re. 90dB SPL/1m). The forward response [Graph 1] is free of any significant narrowband peaks or dips, showing a smooth uplift in treble (+3dB/10kHz re. 1kHz) following a mild –2dB 'BBC trough' between 1-4kHz, after which the extreme HF rolls swiftly away to –6dB/29kHz [pink shaded area, Graph 1]. Incidentally, there was absolutely no measurable difference in the KIM's forward HF response in either the '+1' or '–1' High settings.

Otherwise, pair matching was excellent at 0.6dB while the mild ±2.6dB/±2.7dB response errors account for the very similar 86.0dB/1kHz and 85.6dB (500Hz-8kHz) sensitivities – bang on Fink's own 86dB specification. The KIM's amplifier loading is also largely as advertised – a 5.8ohm/165Hz minimum increasing to >8ohm from 415Hz-60kHz where there's a very mild (maximum) +20° phase angle. The highest angles occur at LF, but at high impedance: –60°/75Hz and +46°/18Hz, both at 17ohm. The impedance drops very slightly to 5.6ohm and 5.4ohm/165Hz with the 'damping' control at 2 and 3, respectively. Its low frequency loading/37Hz port tuning is expertly judged – the 200mm bass/mid unit offering a smooth, gently uptilted sub-2kHz response and a very fine diffraction-corrected LF extension of 46Hz [–6dB/200Hz; green shaded area, Graph 1]. PM