Current Source Crossover Filters

In this article published originally by audioXpress in March 2005, Nelson Pass offers a series of tips about designing filter networks for both voltage and current sources. Nelson Pass provides filter examples that can be used equally well with a voltage or current source.

Radial Engineering confirms its new Space Heater 500 tube overdrive unit is now shipping. The Space Heater 500 is a single-wide tube overdrive module for the Radial Workhorse and other 500 series racks that delivers natural crunch to drums, adds character to voice, and natural compression to bass and acoustic guitar.

PreSonus is shipping the ultra-compact Eris E4.5 studio reference monitor, the third model in the Eris series of two-way monitor speakers announced one year ago, at the NAMM 2013. As with the Eris E5 and E8, the E4.5 can be user-adjusted to the acoustic space, allowing to create a more accurate listening environment or to simulate different common listening environments.