ELAC Navis ARF-51 Active Loudspeaker
November 5, 2019 § Leave a comment
The driver complement kicks off with a concentric treble/mid unit, the 25mm soft-dome tweeter being mounted centrally within a 10cm aluminium-cone midrange for enhanced integration and focus, both the shape of the mid cone and a mesh grille helping control the tweeter’s dispersion. Below that sits a pair of 13.5cm bass units, again with aluminium cones, while within the speaker are the amplifiers for each driver. These comprise a 160W BASH (Bridged Amplifier Switching Hybrid) module for the bass, a similar 100W amp for the midband, and a 40W conventional Class AB amplifier that drives the tweeter.
ELAC may, rather modestly, describe these speakers as being ‘powered’, but by any accepted use of the term this is an active design, with separate amps for each drive unit, and a user-adjustable electronic crossover. There are ±1dB adjustments for the mid and treble, a +1/–4dB selector for the bass, and also a 60Hz/80Hz/flat high-pass filter, handy should you want to use the speaker in conjunction with a subwoofer. The idea here is that – at least when used wired – the speakers are ‘analogue in, analogue out’, with no digital intervention in the signal path. It’s worth noting that the amps used here are all analogue, including the BASH modules for the midrange and bass, which combine a modulated switching power supply with a conventional Class B amplifier [see Investigation,