Apart from the pedigree design and the amazing quality of materials and construction, one of the hidden secrets to the success of the design is the Mark Audio drive unit of a real live instrument. “The moment I saw the drive unit and its specifications I just knew that this was what I had been waiting for all my life to incorporate into my folded horn speakers. Until the Mark audio driver, there was not a truly single driver unit anywhere that could handle the full ten octaves required for real Hi-Fi reproduction. This is not to say there were not some amazing single driver speakers on the market. There were loads, but none of them had really naturally high frequency coverage and for the deep bass one needed to look at designs that were at times more than two metres tall!
To reproduce the sound of a single cello, the speaker has to handle the ultra-high frequencies of the rosin on the bow scraping against the strings (or the fingers sliding on a string) and the deep warm tones of the sound from the belly of the instrument. And all this sound is produced by the simplest energizing of a string either by the plucking of a finger or bowing. And yet multiple drive unit speakers tend to over emphasize the highs and exaggerate the lows while losing the live natural mid-range sounds by artificially splitting the incoming signal over several different drive units, each with their own special characteristics.
Don’t get me wrong there are a number of amazing multi-unit speaker systems out there in the world but none of them will sound the same or as pure as a Pearl Acoustics enclosure and they will not stand up to the ultra-critical test of side by side comparison.