Apparatus and methods for the harmonic enhancement of...

Apparatus for adjusting a frequency characteristic of an audio s

Apparatus for compensating a frequency characteristic of a repro

Apparatus for controlling acoustical transfer characteristics

Apparatus for electroacoustic energy conversion

Apparatus to generate multi-channel audio signals and method...

Arrangement for converting an electric signal into an acoustic s

Arrayable two-way loudspeaker system and method

Audio apparatus

Audio apparatus having electronic graphic equalizer

Audio bass frequency enhancement

Audio bass speaker driver circuit

Audio boost circuit

Audio crossover circuit

Audio crossover circuit

Audio enhancement system

Audio equalizer providing reciprocal equalization plus infinite-

Audio filter with magnetic field cancellation

Audio frequency filter

Audio limiting circuit