State-of-the art. Technology is what sets the Qb far ahead of anything else in its range of reasonable size and price.
Three advanced drivers combine their linear output so accurately that the recorded musicians "appear" arrayed left to right and front to back, between, beyond and behind the speakers. The stereo imaging of a pair of Qb speakers is true - and truly awesome.
One big reason is our exclusive little EMIT - infinity's Electromagnetic Induction Tweeter. The superlative EMIT was utilized first in our Quantum Line Source speaker. Our EMIT,, plus an accurate and efficient midrange driver, plus our advanced new Q-woofer reproduce the entire frequency range from 42 Hz through a super-auditory 32,000 Hz with utter realism. And with as little as 15 watts per channel.
EMIT: demonstrably superior to domes and cones = and electrostatics
Like the finest electrostatic tweeters, Infinity's Electromagnetic Induction Tweeter has an extremely low-mass diaphragm, driven uniformly over its effective radiating area - not locally, as cones and domes are driven
Like electrostatics, the EMIT is highly responsive to high frequency transients in the music.
Unlike electrostatics, our exclusive EMIT displays vastly superior dispersion and power handling capability. It has the ability to reproduce delicate nuance and powerhouse sounds without distortion. The superlative EMIT, a significant advance over conventional tweeters, has previously been used only in Infinity's more expensive Quantum family of speakers. Now you may enjoy its sweetness, range, and accuracy in our lower-priced Series Q speakers.
In the interest of true stereo imaging. Infinity has devoted unusual care in the design of the Qb to the area of crossover frequencies (600 and 4000 Hz) and to balancing the output of our four-inch midrange and EMIT and woofer drivers.
A new technological advance Q-woofer
Infinity's new bass driver varies the mass of its moving element with frequency. At low frequencies the specially treated woofer cone is coupled to its butyl surround for extended response. As frequencies rise, the light cone mass is progressively uncoupled to improve transient response and raise efficiency in the upper bass range.
The butyl surround more effectively absorbs waves that reflect in conventional woofers, muddying and coloring their output
The voice-coil former, or bobbin, is of phosphor bronze. Like the aluminum traditionally used, it helps dissipate heat, but unlike aluminum it does not create reverse eddy currents that slow down rise-time. The result is noticeably better transient response. And the voice-coil is unusually long, allowing long excursions while maintaining linearity.
You don't listen to a pair of Qb speakers. You listen to the live performance through them
When you comparison-test the Qb against any other speakers near its price, do this: Raise the Qb off the floor, as its optional pedestal does - but don't hem it in between bookshelves. As with all good speakers, the Qb should be placed a couple of feet away from the wall. Use familiar records. Switch between speakers frequently. And prepare for something that happens again and again. After a sample of the sheer realism of the Qb by Infinity, other good-to-excellent speakers begin to sound simply wrong.
A pair of Qb speakers "open up" all kinds of music in all frequency bands, and reveal a very real sense of depth. And you realize you've heard sound this realistic somewhere before - but not from speakers. Oh, maybe from more expensive Infinity speakers, but certainly not from anything close to the sensible price of phenomenal Qb
Specifications
Frequency Response: 42 - 32,000 Hz ±3 dB
Horizontal Dispersion: -2 dB at 60°,, left or right (20 kHz)
Suggested for use with amplifier or receivers of : 15 to 150 watts per channel rms
Nomnial Impedance: 4 Ω
Drivers
LF : 10" Q-woofer
MF : 4" midrange
HF : EMIT tweeter
Crossover Frequencies: 600 and 4000 Hz
Dimensions(H x W x D); 630 x 370 x 300 mm ( 25" x 14-1/2" x 12")
Weight : 19,5 kg (43 lbs) shipping
Finish: Birch grain vinyl on particle board
Grille: Brown cloth, removable
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