D E S I G N C U S T O M I Z A T I O N
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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. Teresonic speakers 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.
Big performance even at
4
Watts per channel
The high sensitivity of Teresonic speakers enables low power amplifiers, or high power amplifiers operated at
low power levels, to achieve realistic sound levels in all but the largest rooms. The Teresonic will sound
outstanding and play plenty loudly with an 8 wpc 300B-based tube stereo amplifier, as well as a 25 wpc 845-
based tube amplifier, or any other SET designs. They also sound excellent, if not as totally pure and direct as
when partnered with the single-ended models, powered by a set of the push-pull monoblocs that are rated at
100 wpc. With Teresonic speakers even sonic “gems” such as 2A3-based amplifiers will deliver big
performance, they will come to life and deliver extraordinary musical reality even at few Watts of power. If 1
watt is good for 102 db, then 4 watts are good for a peak output of about 108 db and 8 watts of about 111 db
at one meter distance - and with the lowest distortion you have ever heard in a loudspeaker.
Higher power solid-state amplifiers will benefit from operating on low power levels where the distortions are
lowest – or almost non-existent. Despite manufacturers “paper specifications” even the finest high-end
amplifiers will introduce some sound distortions and colorations when played at high power levels. This is
simply driven by laws of physics and various components’ characteristics that are different at different load
levels. Higher the load, more stress on the component, more difficult for designer to get perfect results – even
harder at the high end. The simple solution is to operate at lower power levels and enjoy your music unspoiled,
as it was created in its natural environment, and still have a big performance of concert hall.
Exceptionally detailed and clean sound
ETQWT© (Enhanced Tapered Quarter Wave Tube) transmission line design, the result of some 20 years of
research and experimentation, 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. It is also the simplest, purest, most uncolored approach to design a
system which allows the speaker drivers to operate in "free air," duplicating the motion of sound waves
emanating from both sides of a musical instrument in live performance.
This, however, is extremely difficult to achieve as any dynamic speaker with a cabinet has to manipulate the
back-wave of the driver. In a sealed-box design, you’re tuning against a certain air pressure to obtain a certain
response characteristic. In a vented box, you employ resonances to achieve a lower cutoff frequency. The only
box where you have the same air pressure behind the driver as in front is the transmission line.
The transmission line is a long folded or unfolded passageway designed to be 1/4-wavelength long at the free
air resonance frequency of the driver, so that the acoustical output radiated from the line opening mixes with
the front-wave from the driver, to cause partial cancellation of the signal, only at the resonance frequency. This
technique leaves the driver free to accelerate and decelerate with ease, except at the resonance frequency where
its motion is inhibited. This "frequency-selective damping" quality is largely responsible for the superior sound
