PST Stealth Black

I bought these super tweeters since my Caintuck Audio Betsy open baffle speakers start rolling off in the treble above 10 Khz, although they still have some response to 20 kHz, so I wanted to get a flatter treble response in that region, or at least up to about 15 kHz where my 60 year old hearing starts to roll off according to test results. Since these Aperion super tweeters have an adjustable crossover from 8 kHz to 16 kHz and sensitivity adjustment by -3 dB to 0 dB, I was able to dial in the treble response I like. I found the best settings for my setup to be 10 kHz cross-over frequency setting and 0 dB sensitivity setting. I found the best position for the Aperion super tweeters to be on top of the Caintuck Betsy's open baffle, centered laterally on the axis of the speaker. With the Aperion super tweeters in my system, in addition to being able to hear some high frequency tones from such instruments as triangles, celestes, and cymbals that I could hear through some other speakers and through headphones, but which I could not hear through the Caintuck Betsy speakers, I was surprised to also hear faster leading edge transitions (aka attacks) even on bass instruments, which made string plucks pluckier and drum thwacks more impactful. I probably should not be surprised at this result since faster temporal transitions require wider bandwidths to be reproduced accurately. Unsurprisingly, I also heard more open and reverberant space reproduced from recordings. I was very glad not to hear any undue and irritating over emphasis of sibilance from adding the Aperion super tweeters. I also do not hear any noticeable so-called "comb filtering" (really acoustic interference fringe) effects with the Aperion super tweeters in my system with the settings listed above. I presume that this is because the drop in the Betsy's frequency response above 10 kHz and the turn on rate of the Aperion's crossover set on the 10 KHz setting are such that there is minimal overlap from the two in the 10 kHz to 15 kHz regime. The super tweeters are also well built and robust. I dropped each tweeter a couple of times during my setup testing while moving them around to find the best location, even chipping the finish on one of them, but I heard no audible degradation in performance after those drops. I don't recommend doing drop tests on these, but having accidentally dropped them I thought their robustness was notable. I should note that the Aperion super tweeters did sound to me a bit smoother and more refined after 24 to 36 hours of burn-in, but they are by no means harsh nor unrefined right out of the box. (Whether that is due to changes in the speaker's sound from burn-in or to accommodation by my sensory system, I do not know, nor do I care.) Overall, the Aperion super tweeters have been the best tweak for my audio system that I have ever bought.

These super tweeters are one of the best “tweaks” you can make with your system. Their adjustability makes them easy to integrate with a variety of speaker styles and designs. It took me a while to figure out how to best incorporate them into my system. I have large electrostatic panels, so placement can be problematic. I settled on placing them on 36” tall stands between and a bit recessed from the main speakers. This seems to mitigate any comb filtering effects that can occur when place on top of a speaker. The effect is more than a little subtle. They have transformed the sound in a big way. In addition to adding air and presence, definition and focus of the higher frequencies have improved dramatically. All of this has been accomplished with zero sibilance or shrillness to the sound. The better the recording, the more pronounced the effect. I highly recommend these to anyone who has speakers that may need a bit of help with the high end. Unlike some other super tweeters that only operate in the inaudible high frequency range, these have an instantly recognizable impact on sound.

I have been in the audio world most of my career and life. The subtle sonic difference is amazing, definitely not overwhelming . The cabinet finish is excellent. Highly recommended

Attached pix clearly shows conducting traces on the planner membrane, so not a traditional foil ribbon. Well made with good internal components and construction. Best for speakers with 89 db/watt/meter sensitivity. My Polk towers are 91 db and I don't really hear these even at zero attenuation. (max setting)

I ordered these in white to pair with my new white Wharfedale Diamond 11.4’s. Amazing combo!! They are easy to connect and tweak. I did not experience any audible issues with comb filtering or other aberrant sound issues people mention about super tweeters. I only heard increased detail, air, holographic FX sounds, longer decay on pianos and strings. Overall Presence was closer and more immediate, but was not accompanied by unwanted brightness or listening fatigue. I can’t recommend these enough for anyone with speakers that are known to have rolled off treble. It’s fun tweaking and optimizing them as well, the knobs in the back make it easy to test each setting out quickly. I suggest setting these atop your speakers in line with the tweeter driver in the baffle to get proper integration. Yours ears will tell you when it is just right :) I settled on -2db and 12kHz for my room with the Diamond 11.4s. Oh yah, they look good too if you’re worried about these sitting on top of your speaker. Atleast mine do being white on white with a black grill.

Could not use, they tripped the circuit protection in my amplifier as soon as they were connected. Tried all options, each one put amp into protection mode immediately. Wanted to like them, fit and finish are top tier, but I never got to hear them.

Exactly what I needed to round up the output from my system, and even though I may not hear every note they reproduce, I can feel it, which is what I was going for.

I love them right out of box for there looks There are not loud and obnoxious, but blend in nicely with my speakers, Because of there ability to go up to 33kHz records do pick up more clicks and pops. Not a bad thing if you have clean records. $299.00 a pair, Yes~! They do add a new dimension to the sound field I'm back to add some more, I'm now listing to The Dead South on CD, Fantastic High notes, Truly mind blowing Also played some Thelonious Monk with John Coltrain Truly amazing sound. I can't imagine what Classical Music would sound like 5 star, Yes again

Me voy a extender en este comentario por que seguramente muchos están incrédulos como yo lo estuve antes de comprar estos tweeters. Estoy consciente que no son para todo el mundo y con esto me refiero a que si tienes bocinas que son muy analíticas como una Bowers and Wilkins o unas Focal no te van a ayudar en nada; pero si tienes bocinas más rítmicas o melódicas como yo (Sonus faber), si te van a aportar esa claridad y aire que les falta sin perder lo melódico. Por qué decidí apostarle a los súper tweeters? Sentía que faltaba definición en los upper highs, les faltaba extensión y aire. Los conecte a mis bocinas e hice los ajustes de corte de frecuencia y decibeles hasta que encontré el punto dulce. Que sucedió? Muchas cosas, primero los platillos sonaron claros y largos, se abrió el sound stage mucho y el aire fue amplio, las Sonus faber siguieron sonando con su carácter melódico pero con mayor definición en los altos sin ser molestos. Aunque la presencia era evidente se volvió más evidente cuando tuve que ajustar los parámetros de mi MCintosh mx122, tuve que reducir los decibeles en el canal central, si, me di cuenta que compensaba yo con el canal central la falta de espacio, pero evidentemente esto reducía el sound stage. Al usar los Aperion y reducir la dependencia de canal central evidentemente abrió es escenario. Pero en donde fue aún más evidente fue en mis propias grabaciones hechas en mi carrete abierto, las cuales había ecualizado para que tuvieran más presencia y altos; para mi sorpresa, ya con la Aperion conectadas; sonaban lastimosas en los agudos pero sobre todo molestaban las frequiencias de 4 y 8 khz; tanto que tuve que ajustarlas -4db en el equaizador para que sonaran agradablemente bien (ahora voy a tener que regrabar todas mis cintas de 1/4). Finalmente el equipo sonaba ahora si mejor en estéreo que en Multicanal. Y aunque pareciera increíble también tuve que ajustar el subwofer por que ahora sonaba muy intrusivo después de tantos ajustes. Así que no es un upgrade solo psicológico, en realidad si cambia todo el resultado final con más claridad, mayor tamaño de escena y más definición, pero hay que hacer los ajustes de la Aperion muy finamente para que no sean inteusivas con los tweeters de las bocinas y solo le den más extensión y claridad pero que no se perciban y lleguen a cansar. Y sobre todo que no modifiquen el concepto total de las bocinas, en este caso las Sonus faber que son muy melódicas. Estoy casi seguro que en una bocina analítica el aporte es mínimo o incluso negativo al sobreponerse las frequiencias. Hay que aclarar que como en mi caso el crossover de las aperion está en 14khz a -5db y aunque muchos podrían decir que estas frequiencias aportan poco al oído, yo quiero recordarles que el corte a 14kz en un crossover no significa que abajo de esa frequiencia no reproduzca, hay un rolloff hacia abajo y un ligero incremento de 2 o 3 dB por encima de esa frecuencia comparado con la respuesta original de la bocina y como llegan alto en frecuencias aunque no se lleguen a oír, si dan una consistencia en la gama audible alta, por eso mis ajustes en -4db en las frecuencias de 8 y 4 khz. Muy satisfecho! Estos suoertweeters le dieron más amplitud y no modificaron la musicalidad de mis bocinas, compensaron lo que les hacía falta. Mis bocinas son sonetto iii de la primera generación, entiendo que las sonetto iii de la segunda generación mejoró el tweeter y extendieron el rango y mejoraron la respuesta, quizás estas últimas ya sean más claras y con mejor sound stage. No quiero decir que mis bocinas no sonarán bien, me gustan mucho, pero les faltaba ese detalle que se logró con las Aperion.

Good super tweeter speakers, very happy

amazing product and customer service, 5 star