Point-symmetrical emission

While Klipsch’s reference line is tuned to a high level of efficiency thanks to the Tractrix horn in the mid / high frequency section and a lot of diaphragm area in the bass, KEF uses a coaxial chassis to set the sonically beneficial effect of point-symmetrical radiation. Horns concentrate the sound. This means that the entire sound energy is sent in the direction of the listening area and less in other directions.


Two ways - a goal


The advantage is that you hear more of the recording and less the peculiarities of the listening room. The problem: too much bundling of the sound has a peculiar sound. The solution: The Tractrix horn has a moderate bundling, which is different horizontally and vertically.


Picture gallery


One has learned that a rather broad radiation in the horizontal plane is good for the sound. Vertically, the sound spread may be quieter, minimizing the disturbing early reflection of the soil and increasing the efficiency.


In connection with sufficient diaphragm area in the bass Klipsch with the reference boxes creates on average three to six decibels more sound pressure at the same operating voltage as conventional loudspeakers. Further advantages of high efficiency: Amplifiers require less power, thus increasing the dynamic potential.


Video Homevision recommendation


Room size: 20 ... 60 m²Position: 0.5 - 1 m in front of the wallConnection: AV receiver


Optimal receiver settings


Separation frequency: 60 ... 80 HzFront: small or largeCenter: smallRear: small


The distortion level of the loudspeaker is lower at a given sound pressure, which also increases the dynamic capabilities of the sound transducer. Especially in home cinema, these features are of great importance.


All five sets of the set work with the same horn. The chassis sizes vary only in the bass.


As a subwoofer the powerful SW-112 with 72 liters Bruttovolumen, a 30-centimeter chassis and woven fiberglass membrane is used. Satte 111 decibels the bass player if necessary in the listening room - about the same value create the center and the floor boxes.


Two dipole emitters are used for the back room. The pre-picture for the special radiation of the dipole loudspeakers is the original Kinoklang in the back.


KEF has a different concept with the Uni-Q driver. The point sound source is the target. To this end KEF developed a sound transducer 20 years ago, which combines two chassis in one. Where a so-called dust protection cap protects the oscillating coil of the low / mid-range driver, a high-frequency dome oscillates in the Uni-Q chassis. Due to the coaxial arrangement of the two drivers, the radiation is point-symmetrical.


Testimonial


Klipsch RF-82II, RC-62II, RS-62II, SW-112


€ 3.700, www.osiris-audio.de


+ Extremely dynamic playing style + very poor discolouration for horns + very good round sounding + very high sound level


Overall rating: good 73%


Price / Performance: very good


The advantage: interference - partial extinguishments outside the axis between two superimposed drivers - are alien to the coaxial waveguide transformer. The sound energy radiated into the room is thus relatively constant over the frequency range. This is important since in a room all reflections contribute to the hearing.


The cone also acts as a sound guide for the tweeter, which contributes to the fact that a similar radiation response can be observed in the transition area of ​​the two drivers. The ease of directivity in the upper mid-range is intended and improves the imaging precision.