The DSP420 is a 2-way digital active speaker with built-in DSP, DACs, and dedicated amplification for each driver. It accepts direct digital audio signals (up to 24-bit / 96 kHz) and performs all crossover, time alignment, and signal processing internally for precise control and minimal distortion.

It uses two 5-inch bass/mid drivers and a 1-inch aluminum dome tweeter, powered by 85 W (bass) and 65 W (treble) amplifiers, delivering clean, high-output sound (>104 dB SPL) with very low distortion.

The speaker is housed in a sealed, damped in-wall enclosure with an aluminum baffle, designed to reduce resonance and provide accurate, transparent sound despite its architectural form factor. 

Meridian DSP The DSP420 accepts digital input signals up to 96kHz/24bit, including Meridian High Resolution (MHR) streams from Meridian Surround Controllers, Processors and DVD Players. Enclosed in a fully shielded housing, Meridian’s unique DSP processing is performed on a specially-designed six-layer PCB using a powerful 100 MIPS Motorola DSP engine. Thanks to this sophisticated audio computer, the DSP420 embodies identical high-technology features to those found throughout the Meridian DSP Loudspeaker family. These include: • Position control to compensate for speaker location • FIFO memory buffer at the input for the lowest possible jitter • Linear-phase crossover for precision drive unit integration • Tweeter delay for perfect driver alignment • 48-bit resolution volume control • Minimal frequency equalisation, delivering a frequency response free from drive unit or electronic colouration • Transparent tone controls • Absolute phase control • Phase-corrected balance control