Compound 4
Completely original drivers developed using the highest quality materials led to a breathtaking overall result: the Dynaudio Compound 4.
The Compound 4 realized a whole new loudspeaker concept, one based on years of development, extensive laboratory and listening tests and - of course - the innovative Dynaudio Compound system. A slim loudspeaker was born, one that convinced with its unbelievable sound quality and its phenomenal deep bass response, enthusing even the most discerning hi-fi critics: "...the deep bass is certainly top-notch… the bass impulses are delivered with a fantastic punch and accuracy…" (Sound, April '86).
The advanced performance was made possible by original bass drivers developed in conjunction with the Compound-system: a 2-chamber enclosure in which an inner driver creates the effect of an infinite air space behind the external bass driver while absorbing the bass driver's back-wave energy. Powerful amplifier signals were now reproduced without restriction, the bass was deep, tight and totally accurate with the highest level of precision. The bass driver itself delivered an incredible combination of speed and extension, a combination of attributes only realized through the Dynaudio Compound system.
Full dynamic range
The Compound 4 utilized a 76 mm soft-dome mid-range equipped with a large diameter voice coil to reproduce the mid-band (500-5,000Hz) frequencies. This driver ensured that signals from the amplifier could be accurately reproduced in their full dynamic range and without any compression or distortion.
A 28mm diameter, resonance damped and ferrofluid-cooled soft-dome tweeter guaranteed that even extreme high frequency dynamics exceeding 120dB would be reproduced effortlessly and without distortion.
All drivers featured in the Compound 4 were continuously improved until the use of 6 dB-per octave crossovers was possible, thus allowing an optimal impulse- and phase-response to be realized.
A further detail implemented into the Compound 4 were the speaker terminals themselves, which featured locking gold binding posts designed for a continuous current of 25 amperes, and delivered a further improved sound quality to the system.
The exactly calculated cabinet design and meticulously engineered drivers and select components integrated into the Compound 4 yielded a speaker with incredible performance capabilities. And in the tried and true Dynaudio tradition of quality, any and all superfluous accessories and technical mechanisms which may have added visual interest but did not serve a performance purpose were passed over in favour of true engineering.
The Compound 4 was conceived to reproduce music accurately, with authentic fidelity, and set the standard for performance in its class by achieving this goal.
Dynaudio consciously abstained from publishing technical specifications as they ultimately do not provide a conclusive indication of the speakers' absolute performance capabilities and overall sound quality. Instead, Dynaudio encouraged that the speakers be experience firsthand - even in the Compound brochure, which itself stated: "Experience Dynaudio live, you will be thrilled."
