The Reference Series tweeters have a 4 ohm impedance, which keeps their sensitivity as high as possible. They are rated at approximately 91 dB of output at 2.83V/1m, which is high enough to work with two of most woofers, once baffle step compensation is factored in. So, the first thing I knew was that to get the most out of the tweeter I would want an MTM or a TMM design.

The RS tweeters have the ability to play lower than many other typical dome tweeters, so I wanted to be sure to put this low-end extension to the test. I knew that there was no point in using a smaller diameter woofer since good high-end extension and dispersion were unnecessary. I decided that a pair of Dayton RS180S woofers would have the output levels, low-end extension, and would require a low enough crossover point to really give the RS tweeters a good workout. With the woofers being magnetically shielded, I decided to go ahead and build the design with the shielded tweeter.