The RDL Active D-Series Loudspeaker features a black grill and is designed to deliver rich, detailed sound while in Decora-compatible wall or chassis mounts. The input accepts either a -10 dBV unbalanced or a +4 dBu balanced signal on the rear-panel detachable terminal block.

Amplification is provided by the built-in high-efficiency Class D power stage amplifier. The amplifier features audio filtering so the speaker will produce crisp quality audio. The high-efficiency Class D output stage amplifier produces negligible heat for all levels of voice or music modulation. The amplified output level is controlled by a front panel volume control. The loudspeaker includes an analog compressor/limiter that makes higher average sound output levels possible without clipping.

The built-in driver is constructed of materials found in premium larger speakers. The unique steel enclosure provides full baffling in a tightly sealed rigid structure. The benefit of this enclosure is that it's designed to provide sonic presence within an extended frequency range expected from larger speakers. Internal filtering rolls off out-of-band frequencies to reduce distortion and increase peak power capability. Dispersion covers a spherical area of nearly 180 degrees with the speaker mounted in a wall.