Ohm Speakers 
Ferrofluid was patented by NASA in 1963 as a technique to move liquid propellant in the low gravity of space. Pumping fluids that do not stay at the bottom of a tank by gravity is not easy.…
NASA Technology Comes to Speakers: Ferrofluid
Microphone Techniques Affect Imaging:
Speakers are the weakest link in almost all stereo systems. This has been my opinion for many years. In fact, it was the subject of the very first of this series of posts over a year ago…
Are Single-driver Designs Better Than Multi-driver Designs?
There are many claims about the advantages of one design over the other. Each side has valid arguments and many misconceptions. We will discuss most of the major points of contention. There…
SBA: What is Sub-Bass and how do you Activate it?
Extending the deep bass improves the perceived sound quality of almost any speaker. Tests have been performed where the only change in the speaker’s performance is extending bass and…
Crossovers, the Devil is in the Details
You need a crossover when you want: wider frequency range than the individual driver in question delivers, a specific dispersion pattern and/or greater output than you can get from a…
Red Rover, Red Rover, Tell Me ‘Bout the Crossover
For speaker designers, crossovers are some of the most problematic issues they face. By definition, the crossover splits and directs the electrical energy from your amplifier to the…