We are always searching for a tweak for our audio systems, something to improve the presentation, provide larger lows, improved twinkling highs, a realistic soundstage, and better imaging, etc. I jumped on the super tweeter bandwagon back in May 2019 and continue to look forward to new products offered by a company located in Wilsonville, OR. The name of the company is Aperion Audio, and they offer a full line of loudspeakers as well as a line of super tweeters, which immediately grabbed my attention, because of their very versatile design. Back on May 18th, 2019 I created a thread called "How I Transformed My Home Listening Experience" which is still active today. At that time Aperion had created an adjustable planar magnet super tweeter housed in what I like to call a Steinway gloss black housing that looks at home atop any bookshelf or floor standing loudspeaker. I found using those super tweeters hugely impacted the overall musical presentation of my main system, so much so that I purchased a second set for my smaller Polk LSiM 703 bedroom loudspeakers. On April 24th 2020 I created a second thread on their newest super tweeter. They introduced a second offering in their super tweeter lineup, the larger, more robust full ribbon design super tweeter. The name of my second thread was "How I Transformed My Home Listening Experience, Part II." I hope you take a look at part one and two, which brings me to this new thread. I don't think I have ever acquired a product that has offered such a huge overall sense of space, improved soundstage and realism when listening to music, what subwoofers do for the lower octaves, the super tweeter does for the light airy delicate high frequencies. The newest product in the Aperion super tweeter line is called an AIR MOTION TRANSFORMER DUAL FIRING SUPER TWEETER. There are several things that really set this latest offering apart from every other product they offer, and that is absolutely NOT diminishing their less expensive super tweeters, I have owed and do own those as well, however this one just sets a new super tweeter standard, for all brands of super tweeters. Personally, I think the most notable engineering advancement on this new model is the dual firing feature. No other aftermarket super tweeter I have seen fire from the front as well as from the rear, creating just a huge believable and spacious sound stage, this one feature makes such a difference in the overall musical presentation, as you have secondary reflected sounds in the higher frequencies, exactly like adding a rear firing tweeter from 8KHz up, or wherever you set your roll off frequency. Without getting too lengthy, let me share some of the advantages of this particular product design over other super tweeters I have viewed, and let me say this, this is a tweak that can be carried from one loudspeaker to another. If you upgrade your loudspeaker system, you take this tweak with you. The rated sensitivity of this super tweeter is 96dB, obviously very efficient. It can be coupled with most any bookshelf or floor standing loudspeaker rated between 87-96dB sensitivity, and unlike other add on super tweeters, this product has adjustable gain attenuation which is shown in the pics, ranging from 0dB (wide open), -1dB,-2dB, -3dB, -4 dB and -5dB, and the setting is easily changed with a knob click, so nice! This allows this super tweeter to be used with loudspeakers with a multitude of sensitivities, creating a flawless blend. Because every loudspeaker has a different crossover network and tweeter crossover points, this super tweeter offers 5 different crossover point adjustments, again, adjusted by a simple knob rotation that firmly clicks in place, ranging from 8KHz, 10KHz, 12KHz, 14KHz, and finally 16KHz, enabling the super tweeter to integrate with virtually ANY loudspeaker exactly where you want the augmentation to occur, the perfect blend with most any loudspeaker. Aperion has created a very worthy addition to almost any home audio speaker system on the market today, in my opinion and each generation is an improvement. The power rating is from 10-150 watts and the weight of EACH super tweeter is 3.5 pounds, they are not lightweights. The entire housing of each super tweeter is heavy metal, no plastic here, plainly put, this is a well constructed product, a quality build to be sure. The air, the space, the realism, the snap, crackle and pop, cymbals, flutes, female voices, bass guitar, all stringed instruments, especially piano, everything is all so new and fresh with the addition of these super tweeters. If you have not tried any of these super tweeters, you are missing out on the best tweak an audiophile can make to their system. Aperion really pulled out all stops with this dual firing design, it adds so much depth, just a very noticeable improvement. The tweeters increase high frequencies from the front and depth and added realism from the reflected sounds coming in delayed time from the rear firing side. Once you jump on this ultra high frequency bandwagon, there is no jumping off, and you take your improvement with you from each speaker purchase to the next. I hope my experience with these super tweeters encourages you to give them a try, you just do not know what you are missing! I was so pleased to know this company offers a 60 day home trial, and if you decide you do not like the product for any reason, they let you return it, a very nice way to audition something in your home with no pressure. I personally have not found any of their super tweeter designs I did not like from their planar magnet to the full ribbon to their newest flagship dual firing super tweeter addition. We all look for practical, real tweaks for our home listening experience, well here is one that will blow your socks off!