Dynaudio Contour 1

The Dynaudio Contour 1 was produced from circa 1989 to 1991.  It was among the first Contour range, along with the Contour 2 and 4.  Then, it was already considered the classic among small speaker systems.  From the Contour 1 came later a Mk2 version, then the Contour 1.3, and currently the 1.3 Mk2 and 1.3 SE.  There was also a special version of the Contour 1, known as the Special One.
One of the main differences between the Contour 1 and the current day 1.3 Mk2 is that the early model is almost a sealed box design, whereas the current model is a bass reflex (ported) system.  The former is 'almost' a sealed box design because it does indeed have a port, albeit a resistive one, called the Variovent.  This makes it a lower efficiency design, but on the other hand endows it with superb bass control when driven with sufficient quality watts.

The tweeter is a D28/2 and the woofer a 17W75.  The Mk2 version features a linearized impedence response and phase-correction circuitry with a frequency crossover slope of 6 dB/oct.  This avoids distorting pulse errors which occurs inevitably with crossovers of higher slope. 
Construction and build is of very high quality.  The sound is on the whole very natural, neutral and uncoloured.  Treble is clear and sparkling, mids are transparent and the bass surprisingly extended and well-controlled.