PAIR USUALLY SELLS FOR A LOT MORE! Need to get rid of these they are too big for my space!!!!
Low Frequency Loudspeakers
Two 15 inch (380 mm) low frequency loudspeakers are mounted in in a ported enclosure that provide accurate reproduction and high power handling capacity at very low frequencies. Each loudspeaker is driven by a 4 inch (100 mm) diameter voice coil, fabricated of edgewound copper ribbon wire and an 18 5/8 lb (8.5 kg) magnetic assembly with a flux density of 12,000 gauss (1.2 T).
Midrange Loudspeaker
Music fundamentals lying in the region between 250 Hz and 1.1 kHz are reproduced by a 12 inch (300mm) loudspeaker housed in a sealed sub-chamber and driven by a 4 inch (100 mm) edgewound copper ribbon voice coil. The driver achieves high acoustic efficiency and effortless reproduction even at extreme volume levels.
High Frequency Compression Driver
Reproduction from 1.1 to 9 kHz is accomplished by a massive compression driver energized by a magnetic assembly weighing 23.75 lb (11 kg). Its 4 inch (100 mm) edgewound aluminum ribbon voice coil suspended in a magnetic field of 18.000 gauss (1.8 T) drives a diaphragm pneumatically drawn to shape 0.003 inch (0.08 mm) aluminum alloy.
Horn/Lens Assembly
High frequency output is distributed by an exponential horn combined with a slant plate acoustic lens. The 11 plates of the lens is set an angle of 38 degrees and operates in a manner analogous to a divergent optical lens. The lens provides controlled propagation of high frequency acoustic energy.
Ultra-High Frequency Transducer
The highest octave of the audio spectrum is reproduced by a compression driver specifically designed for ultra-high frequency reproduction and dispersion. Its 3.25 lb (1.5 kg) magnetic assembly develops a flux density of 16,500 gauss (1.65 T) and drives a 1.75 inch (45 mm) edgewound aluminum ribbon voice coil. The driver utilizes a ring diaphragm pneumatically formed of 0.0022 inches (0.06 mm) in anodized aluminum foil stock. Output is directed through a diffraction horn providing 90 degree dispersion in the plane perpendicular to the diffraction slot while restricting dispersion in the vertical plane to approximately 40 degree. The maintains smooth response within 3db to 20 kHz.
Frequency Dividing Network
The low frequency loudspeaker operates to 250 Hz and require an attenuation rate of 12 db per octave below and above the crossover frequency. Transition may be accomplished with Electronic Frequency Dividing Network or with several electronic crossovers or filtering devices commercially available.
Enclosures
Components of the 4350 are housed in a rigid enclosure incorporating two acoustic chambers. The two low frequency loudspeaker are housed in a bass reflex chamber which has an internal volume of 9.5 ft (265 liters). Proper loading to 25 Hz is accomplished by a distributed port consisting of 6 openings. The midrange loudspeaker is mounted in a second sealed sub chamber.
