The Compact Cube is a 150-watt active sub woofer that has been designed to compliment the other elements of the Compact System. As the name suggests, this is a compact design, being a cube of around 350mm (14 inches) in size. Yet despite these compact dimensions the Cube packs a punch, the sort of punch you need to convey the realism of the sound tracks found in today's movies.

At the heart of the Compact Cube is a 150-watt discrete amplifier, which can provide the level required for the full enjoyment of the movie. The amplifier has a built in "Time Power Sense Limiter" to ensure high peak power output with no danger of overload conditions developing. The amplifier also includes an auto on/off function, which is signal sensing in its operation; this means that in operation it is as simple to use as possible.

This is matched to a 250mm (10 inch) high excursion bass unit, featuring a air dried paper cone, rubber surround, Kapton voice coil and flux-optimised high-power magnet system. All of which means that the speaker can translate the electrical information the amplifier delivers into audio you can enjoy.

To marry these two units together, the crossover is an extremely sophisticated unit allowing maximum flexibility of delivery whilst offering full system protection. It utilises a 6th order excursion-optimised FiNo (Fink-Notthoff) alignment for maximum output with the smallest possible cone movement. The crossover also incorporates a fully adjustable 2nd order 40-200 Hz upper frequency cut off for the Compact Cube as well as phase switching to allow seamless integration of the Cube both into the system and the room. Finally the output of the Compact Cube is fully adjustable both to ensure excellent system matching but also to allow further adjustments to compensate for variations in recordings.

All this is housed in a classic Castle cabinet, which benefits from over thirty years experience in the design of acoustic enclosures. The cabinet is again manufactured in MDF board, but in this case a far thicker grade is used. The 18mm board is again veneered on both sides and in this application also has an internal ring brace to further reduce unwanted vibrations within the cabinet. Unlike the other elements of the Compact's the Cube is a reflex design, meaning the cabinet is vented. To achieve this with no loss of detail, a large diameter double-trumpet port tube is utilised, firing downward toward the room floor, allowing easy room placement to be achieved.