Extended High Frequency Aluminum Ribbon Tweeter: This is not just any normal tweeter... While most tweeters max out at around 20K, the APERION Aluminum Ribbon Super Tweeter extends another 20,000+ Hertz above that, reaching up to 40,000 Hertz and providing an ultra smooth, clean high-frequency response for the ultimate listening experience. 5-point Crossover + OFF: Choose between 8, 10, 12, 14 or 16 kHz to set the Super Tweeter floor for the perfect blend with your speaker. The "OFF" position renders the Super Tweeter inert. The lowest setting, 8 kHz, will provide the most overlap with your existing tweeter while the highest setting, 16 kHz, will have minimal overlap, picking up at the top-end of the range. The crossover slope is 12 dB/octave. Treble Adjust Knob: Too much of a good things? Use the treble adjust to reduce the output of the Super Tweeter. Just flip the switch and adjust to taste, up to -5dB. Easy Connection: The Super Tweeter shares the same binding posts as the speaker you're pairing it with. It feeds off the power your main speaker is already receiving, so no need to connect directly to an amplifier. Beautifully Curved Cabinet: The finishing touch for every Super Tweeter Speaker is a matte black/white or piano-black lacquer that’s so right for every decor, your coffee table will be jealous. 5-Way gold-plated binding posts: The 5-way gold-plated binding posts let you connect your speakers any which way you choose: bare wire, banana plugs, spades, round pins or flat pins. This APERION Super Tweeter features a true ribbon design, which uses a 20 μm thick (0.02mm) aluminum ribbon strip. Due to the lightweight and thin ribbon size, it is ultra-responsive to transients and provides the accurate upper frequency detail. The clarity of this speaker brings a sense of lightness and heightening the overall mix without any harsh or distorted traits. The impedance of the aluminum ribbon tweeter is almost constant, so it maintains a consistent frequency response curve in the higher frequency band range up to 40 kHz. True ribbon tweeter designs are able to handle a higher SPL than planar magnetic. Naturally with the true ribbon design, an electrical current can’t directly touch the ribbon so we employed a transformer that reaches up to 60 kHz, which requires two pieces of exceptionally strong neodymium 2-1/8” (55mm) by 3/8” (10mm) magnets to produce the linear magnetic field. The entire magnetic, ribbon, and damping material are enclosed in heavy-duty steel chamber. Overall, this ribbon tweeter design allows for minimal distortion compared to the Planar Magnetic Super Tweeter, and along with the longitudinal shape of the ribbon, the true aluminum ribbon super tweeter creates a delicate and spacious sound field. What is a Super Tweeter speaker? Put simply, it’s an additional tweeter unit which covers a wide and extended high-frequency response, beyond that of your existing loudspeaker’s integrated tweeters. Many loud speaker systems have poor high frequency performance. A Super Tweeter specializes in ultra-high frequencies and is used in conjunction with a bookshelf or tower speaker. Its purpose is to create a more realistic sound field, often characterized as "airiness," that enhances the listening experience. Super Tweeters are sometimes found in high fidelity speaker systems and home theater systems. They are used to supplement the sound of tweeters by reproducing frequencies which the existing tweeter may produce only with a narrow polar output, or perhaps with distortion. A Super Tweeter speaker provides auxiliary high frequency effect, detail, density and texture that can enhance your existing system’s sound field with width, depth and enhanced timbre. A Super Tweeter is generally intended to respond well into ultra-high frequencies over 20 kHz, the commonly accepted upper frequency limit of human hearing. Super Tweeters are ideal for taking advantage extended-range audio formats such as vinyl, SACD, FLAC, UHD Bluray and other high-fidelity products.