ELAN’s D Series Amplifiers are truly in a class all by themselves. These amps are the first amplifiers to embrace Class T digital technology, which provides the very best in performance, efficiency and sound for the space. Typical amplifiers waste over half their energy as heat. The ELAN D Series of premium amps use Class T digital technology that is over 85% efficient. This means all power is produced as incredible sound rather than heat. ELAN uses ACE which is our “Automatic Clip Eliminator” circuitry. This is an ELAN-engineered, patent-pending dynamic leveling circuit that makes all D Series amps virtually clip-proof, ensuring the cleanest power at all times. Space Saving The D660’s single rack-space design allows for efficient use of space while producing tremendous power. Six digital channels produce 75 Watts into 4 Ohms, making this amp worth its weight in power!