The smallest loudspeaker in the Reference Series, the R4 is an ultra-compact 2-way passive system engineered to convey the elegance, performance and headroom of the Reference Series in the most compact package possible. Intended to expand the application range below the R5, the R4 retains the same DNA as its siblings, delivering truly abundant audio that defies its physical size. This makes the R4 perfect as a powerful front fill or theatrical delay, or for sleek reinforcement in a corporate or audio/visual setting, or subtle and sympathetic deployment in Houses of Worship. Despite its diminutive footprint, the R4 has a surprising overall SPL output and low frequency performance, making it ideal for themed attractions and perfectly suited to any context where both performance and size are critical.