The incredible 101.5dB and 103dB performance of Teresonic speakers – higher than any comparable products, allows low power amplifiers, or high power amplifiers operated at low power levels, to achieve realistic sound levels in every room. The Teresonic will sound outstanding and play plenty loudly with an 8 wpc (Watts Per Channel) 300B-based tube stereo amp, as well as a 30 wpc 845-based tube stereo amp, or any other SET integrated designs. They also sound great when partnered with a set of the push-pull monoblocs that are rated at 100 wpc. You can play them with 100 wpc solid-state amplifiers, and the performance will be also excellent. And with the lowest distortion you have ever heard in a loudspeaker.

Interestingly, Teresonic speakers always sound best with tube amplifiers, not necessarily because of a richer vocal register and more warmth in the upper bass/lower midrange or the like (though that is generally the case), but because of the more realistic dynamic contrasts available through the tube units.

Teresonic speakers are deliberately designed to take full advantage of smaller tube amplifiers, and that is what they do best. Never mind the fact that you just do not need more than about 50 wpc to play music as loudly as you would ever want to (if 1 watt is good for 98 db, then 32 watts are good for a peak output of about 113 db at one meter distance). Again, with the lowest distortion you have ever heard in a loudspeaker.

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Speaker sensitivity chart shows the top 50 most efficient speakers based on comprehensive data published in Stereophile’s 2005 Complete Guide to High-End Audio Gear. Keep in mind that dB measure is logarithmic rather than linear so every 3dB difference means two (2) times better performance; 6dB difference is four (4) times better, and 9dB performs eight (8) times better! Note that speaker designs such as horns and electrostatics are mostly excluded from this chart.

When sensitivity is combined with impedance to show how much amplifier power is required for the loudspeaker to play at satisfying volume levels, the picture changes even further. When comparing low impedance, 4 Ohm speakers draw twice the current from the amplifier, providing the illusion of greater performance, while placing more stress on the amplifier’s power supply and producing more distortion. Therefore 8 Ohm should be considered the true measure of performance.

Music instruments are not built as square shaped boxes. For a reason! Conventional box speakers sound like box speakers! Ours don't. Form follows function and our enclosures tend to be very attractive, sculpture-like shapes – just like fine music instruments.

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The unique design of Teresonic speakers makes them a welcome addition to any room. Any way you consider them – as a piece of art that sounds great, or great sounding speakers in an eye pleasing package, Teresonic speakers are handcrafted to highest standards using the finest materials. High gloss finish enhances natural wood veneer and superb craftsmanship that one expects from speakers costing thousands more.

The purpose of the enclosure is to bring out the best of the drive-units. When we build an enclosure we go as far as we can to ensure that it doesn't add any sound of its own. By our choices of shape, construction and materials, we minimize internal resonances, negative diffraction effects and cabinet vibrations.

Teresonic speakers are made from MDF, CNC cut to shape to please even the most discriminating eye. The computer control allows greater accuracy than is possible with traditional methods, and allows us to shape internals and externals to the correct contours- an ability not provided by standard cabinetmaking practices.  All of our cabinets are covered in the finest veneer with hand rubbed oil finishes, giving you a product you can enjoy for a lifetime.

ETQWT© (Enhanced Tapered Quarter Wave Tube) transmission line design is the key for Teresonic speakers’ extremely clean and accurate midrange, the widest range of sound audible to our ears, and extended low frequency response – up to one-half octave below the fundamental resonance of the driver. ETQWT technology offers the following advantages over a conventional ported or sealed designs:

- Extreme performance without distortion

- Exceptionally natural and warm midrange

- Well defined low frequency extension

- Consistent balance at all levels

- Stable and consistent 3D image

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The unique design of Teresonic speakers makes them a welcome addition to any room. Any way you consider them – as a piece of art that sounds great, or great sounding speakers in an eye pleasing package, Teresonic speakers are handcrafted to highest standards using the finest materials. High gloss finish enhances natural wood veneer and superb craftsmanship that one expects from speakers costing thousands more.

The purpose of the enclosure is to bring out the best of the drive-units. When we build an enclosure we go as far as we can to ensure that it doesn't add any sound of its own. By our choices of shape, construction and materials, we minimize internal resonances, negative diffraction effects and cabinet vibrations.

Teresonic speakers are made from MDF, CNC cut to shape to please even the most discriminating eye. The computer control allows greater accuracy than is possible with traditional methods, and allows us to shape internals and externals to the correct contours- an ability not provided by standard cabinetmaking practices.  All of our cabinets are covered in the finest veneer with hand rubbed oil finishes, giving you a product you can enjoy for a lifetime.

Helmholtz resonators are designed for “picking out” particular frequencies from a complex sound. They are purely acoustical, rather than electronic elements, responsible for the exceptionally smooth response of Teresonic speakers without distortions and unwanted colorations.

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The research of Herman L. F. von Helmholtz (1821-1894) straddled the interfaces between physics and physiology and psychology. His book, On the Sensations of Tone, published in 1862, at first appears to be on music and its perception, but on a deeper examination, is also a classic textbook on the subject of vibrations. The book describes the form of resonator that he developed for picking out particular frequencies from a complex sound.

A Helmholtz resonator is a container of air with an open hole (or neck, or port). A volume of air in and near the open hole vibrates because of the 'springiness' of the air inside. A common example is an empty bottle: the air inside vibrates when you blow across the top. (It's a fun experiment, because of the surprisingly low and loud sound that results.) Loudspeaker enclosures use the Helmholtz resonance of the enclosure to smoothen the speaker response across the full range and to boost the low frequency response. http://www.phys.unsw.edu.au/~jw/Helmholtz.html

True high end speakers such as Teresonic, need top quality drive units. Lowther drivers are hand-made by Lowther-Voigt Ltd in England, and incorporate extremely powerful magnets and ultra-light paper cones, leading to extraordinary sensitivity, transient response, and low distortion.

What is a Tesla? Tesla and the symbol T represent an International Standard Unit for Magnetic flux density. The higher the T number for magnets in your speaker, the higher the level of diaphragm acceleration that can be achieved, leading to more detailed sound and overall “speed” of the speaker. All Teresonic speakers use renowned British designed Lowther drivers with extremely powerful rare earth magnets exceeding 2 Tesla, allowing them to achieve realistic sound reproduction that has to be heard to be believed.

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Lowther philosophy: Hear the music, and only the music. How? Build a full-range, natural-sounding speaker that is as low in coloration as possible and make it as electrically sensitive as possible. This may seem at odds with conventional wisdom, and, in truth, the majority of Lowther-based designs do manifest a degree of coloration that we (and many others) find unacceptable. This is primarily due to a couple of undesired resonances in their responses that conspired to make the somewhat shouty, overly-forward and colored presentation that the drivers have been infamous for some time. After many years of research and experimentation Teresonic engineers created Ingenium and Integrum loudspeakers. They are possessed of a stunning sense of aliveness and vitality, and have a degree of sonic invisibility that is both seductive and addictive. They play to high volumes quite easily with miniscule amplifiers of as little as 3-10 wpc, but they can take up to 100 wpc. When properly placed (they like to be in the vicinity of a corner but not shoved all of the way into one) in a room they produce very even, phase-correct response from the lower 30s all of the way up to well over 18 kHz, where our hearing begins to taper off. One can describe the sound as like electrostatic’s in many respects, as the speakers’ response to a signal is almost instantaneous due to the extremely low moving mass of the Lowther drivers.

All Lowther drivers share some common characteristics: 1) they are extremely efficient, 2) they each are rated at 100 W, 3) each uses a dual paper cone design, 4) each has a maximum VC (Voice Coil) travel of +/-1 mm, and 5) each is expensive for any mass-producer. These all reflect the Lowther design philosophy:

• One VC per driver obviating problems caused by crossovers, assuring accurate time and phase alignment

•  The special rolled (not formed) paper is extremely thin and light weight

• The design is implemented as a 3-way: a) the radiation from the VC edge radiates directly into the annulus between the phase plug and the whizzer cone, b) the whizzer cone handles the wide midrange, and c) the main cone handles the bass. The "crossover" is via mechanical decoupling between the radiating elements.

• The VC's are wound with ferric materials rather than copper or aluminum

• Highly efficient, Lowther's stated goal is that each of its drivers should be able to play around 100 dB in an actual listening room with as little as 1 watt of power.

• Lowther's magnetic circuits are unique in the current market. The size, weight, and flux density of the magnets are enormous for the size of cone

We say "Lowther for Life". We mean that once Lowther loudspeakers are used, audio and hi-fi perfectionists stay with them for life. And those that stray come back. The reproduction is the most life-like available, and gives the feeling of being in the concert hall.” – Lowther web site

Teresonic one-way speaker design with no filters and crossovers, uses full range high-efficiency speakers, and provides a wealth of detail: exceptional dynamic range and a sense of musical “liveness” that you don’t hear elsewhere.

Music is made up of approximately 70% midrange. If the midrange is not right, then the remainder of the frequency spectrum does not matter. Conventional designs put a crossover in the mid-range to split the signal to the bass driver and the tweeter. This is exactly the region where our hearing is most sensitive. These crossovers introduce phase and balance problems that cause deterioration in detail, transparency and imaging.

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The challenge is to make speakers that we can call transcendental - something that breaks boundaries and creates emotion. Teresonic speakers operate our full-range speakers without any electrical components such as filters or crossovers between the amplifiers and the speakers. Conventional designs put a crossover in the mid-range to split the signal to the bass driver and the tweeter. This is exactly the region where our hearing is most sensitive. These crossovers introduce phase and balance problems that cause deterioration in detail, transparency and imaging. Even worse, most speakers go from a cone driver for the bass to a tweeter with totally different sonic characteristics, such as a dome or ribbon tweeter, for the treble.

The ability of the Teresonic speakers to speak across the full frequency spectrum with one voice, and with such speed and lack of coloration, makes them seem all the more electrostatic. In the end, however, the Teresonic speakers will play much louder than all except the largest ESLs (such as big Soundlabs), and they will best any ESL in bass power and dynamic wallop. You can hit these speakers with hard transients and they not only do not flinch, they start and stop on a dime and deliver the full frequency and dynamic range of the signal. It is actually kind of hard to truly convey the full abilities of these speakers. The Teresonic so well pass on the sonic thumbprints of the rest of the components in the system that they themselves tend to be pretty chameleon-like in their own sound. We believe this an absolutely great thing in that the loudspeakers will not hide or alter any aspect of the signal they are fed.

Teresonic speakers are built using the world’s best components such as zero interference Clarison© cables, and WBT terminals and silver soldering.

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Many high-end speakers on the market will use standard wiring inside the box between drivers and connectors in the back of the box. Not so with Teresonic speakers which are equipped with the same high-end Clarison cables inside the box that are offered to connect to your amplifier. Matching speaker cables and wiring inside the box is important to maintain the sonic character in the entire chain.

WBT is universally regarded as the Rolls Royce of audio connectors. A binding post from WBT is truly a functional work of art and a symbol of quality. A single pole terminal is able to handle 200A continuous current, and has a patented clamping mechanism for high compression connection of spade connectors and crimped wire. The post accepts a 4mm banana plug, 6mm or 8mm spades and features a patented rotating collar design that requires only finger tightening to securely fasten a spade. WBT's line of connectors is unlike any other. Featuring unrivaled engineering and design principles they have been designed and refined for trouble-free reliability and superior sonic performance. The formula is simple: develop innovative designs and build them with the finest materials. Oxygen Free Copper Alloy, Teflon™, and 24K gold are employed to produce connectors like none other. This cost-no-object connector features the most powerful locking mechanism in the business and is precision machined in West Germany to exacting tolerances of < 2/100 mm. The base metal is an extremely conductive, a proprietary alloy based on over 99.996% pure copper. Quite simply, the WBT connectors are for those who appreciate owning a product of the highest standard.

All soldering in Teresonic products is done using the highest quality WBT solder with 4% fine silver content. The halogen-free flux protects against etching of surfaces and warrants long term stability and corrosion resistance.

Teresonic speakers come equipped with a set of fine speaker spikes.

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By rigidly coupling a loudspeaker enclosure to a floor by means of a "spiking" system, it is possible to dramatically improve clarity, stereo imaging and bass response. Speakers produce sound by moving a paper-cone back and forth, thus pushing on the air in the room. Air, due to inertia, tries to resist motion. So, the speaker ends up exerting force against its own cabinet instead. This causes the cabinet to move. If you can prevent the cabinet from moving, more of the energy is used to move the air, rather than the cabinet. More air movement means more sound. The easiest way to keep your speaker cabinet from moving is to place it on a hard surface. If you place it on a soft surface like carpet or rubber, it can move too easily. Installing spikes on the bottom of your speaker cabinet allows it to essentially reach through the carpet (and padding) and onto the hard floor below.

The cone-shape of a "spike" serves a dual function. It focuses all of the weight of the speaker onto a single point. If the base of your speaker measures 10" x 10" (100 square inches of surface area) and weighs 100 lbs., that equals 1 pound per square inch exerted onto the floor. Now, by placing your speaker on cones you can reduce the surface area to a tiny point that may exert thousands of pounds per square inch onto the floor. That prevents the speaker from moving. In addition, the cones allow mechanical energy from the speaker to be absorbed by the floor, but will not allow energy in the floor to reach the speaker.

These attractive spikes are precision machined from solid brass and then plated with a durable gold finish. The cones are super-high quality and are polished to a mirror-like finish. They look and feel like fine jewelry. Each cone spike weighs 86 grams and measures 1-1/4" diameter and 1-1/2" tall. The two piece threaded tip design allows for precise level adjustment. Floor protecting disks are also included.