The world is full of passive speakers using basic and often inefficient passive networks with the simple aim of offering an affordable, easy-to-install solution when attached to any amplifier available. The results, however, are often far from acceptable due to poor phase coherency through a minimal crossover circuit and time misalignment between components.

Add to this high distortion from low cost amplifier designs, and you have a speaker highly susceptible to feedback with very poor fidelity. The growth of active speaker technology has provided suitable advances in resolving some of these issues; however, there are economic advantages in installing passive speakers that can still provide high quality reproduction if done properly. When KV2 Audio decided to add a passive line to our growing range of speakers, we looked at how we could improve the design of a passive (analog delay line) crossover network to achieve the best possible sound quality. Drawing on our deep experience in active technology, we developed an analog delay line circuit that would provide time alignment and phase correction passively, substantially improving clarity and definition. Combined with our Active Impedance Control, the results are simply stunning.