Infinity Quantum 2 speakers

 

Where in the world can you hear the revolutionary woofer with the dual voice coil? Only in Infinity's Quantum Series. Our Quantum Line Source speaker reaches down to 18 Hz.

Here in its closest competitor, the Quantum 2, it goes to 24 Hz - nut you get an extra 2 dB of efficiency.

And where will you find the satiny sounding Electromagnetic Induction Tweeter (EMIT)/? Only in Infinity's Quantum Series.

The Quantum Line Source stacks them four feet high. The slightly more compact Quantum 2 uses the same tweeters, but not quite so lavishly.

In between those extraordinary, exclusive low and high drivers, both QLS and Q2 use Infinity's high-definition 1-1/2-inch dome midrange driver and transmission-line midbass coupler.

 

What comes out of the Dual-Drive Woofer is a new bass experience

Everybody knew for years it was impossible to get acceptable efficiency, good transient response, enough power, and extended bass range out of any enclosure of reasonable size. So every speaker system in the world represented a serious compromise of one or more of those desirable characteristics. Until, William Watkins found the solution to problems of the speaker's fundamental resonance, back-EMF and the resultant impedance peak. He invented a woofer with two voice coils. Right down where rising impedance and failing response were inevitable before, his second voice coil takes over, presenting a low impedance path to the amplifier in the region of resonance.

Now the speaker can make use of the amplifier's power at low frequencies, because back-EMF is reduced. Now input rather than inherent resonance can control the cone. Now extended bass response and accurate transient performance can co-exist beautifully. The bass driver that makes all this happen is called the Infinity-Watkins Dual-Drive Woofer. It is one of the significant audio advanced that set Infinity's Quantum Series apart.

 

Infinity EMIT is like the sweetest of sopranos without a trace of temperament

Working for years to perfect the electrostatic tweeter for what became our $4000 Servo Statik 1A speaker system, we dreamed of creating the magnetic counterpart of the electrostat. Without any of the same problems of breakdown or need for a transformer. With the same advantages of a low mass diaphragm driven uniformly overall. If only there were a magnet powerful enough. We finally found our magnet, made with the rare-earth material Samarium Cobalt, four to seven times more powerful than the finest alnico magnet.

And then we found we could make a tweeter that was not only easier to control than the electrostatic, but also easier to listen to. With admirable range and realism and nearly perfect horizontal dispersion. This new breed is named EMIT Electromagnetic Induction Tweeter Audio technicians esteem it technically. Music-lovers love it instantly.

 

More than merely a revolutionary woofer and superlative tweeters

High-definition 1-1/2" dome drivers reproduce the midrange in the Quantum Series. And in the midbass (200 to 600 Hz), where about half of all musical fundamentals lie, we felt it vital to provide our Quantum 2, like our Quantum Line Source, with a driver that could speak with absolute accuracy. The answer is our meticulous midbass coupler.

We at Infinity have strong feelings and a goodly store of savvy about phasing and crossover technology. The finest fruits of our stubbornness and know-how are the startlingly lifelike stereo imaging and depth that our Quantum Series speakers produce.

 

Specifications

Frequency Response:  24 Hz - 32 kHz ±3 dB

Horizontal Dispersion:  -2 dB at ±60°, 20 kHz

Suggested for use with amplifiers of 45 through 350 watts per channel RMS

Nominal Impedance:  4 ohms

Drivers

12" Infinity-Watkins Dual-Drive Woofer

4" midbass coupler, transmission-line loaded

Two 1-1/2" dome midrange, specially treated

Three EMIT tweeters

Crossover Frequencies:  200 Hz, 600 Hz and 4000 Hz

Controls:  Level for midbas coupler, midrange and tweeters.

Variable crossover point for tweeter

Dimensions (H x W x D):  1240 x 460 x 330 mm (49" x 18" x 13")

Finish:  Oiled walnut veneer, Removable grille

Weight:  63 kg (138 lbs) packed