The 4Pi tweeters disperse sound from the body of the speaker, allowing for a spacious and very large sound stage effect.
The combination of direct-radiating loudspeakers, providing precise location and imaging and the omni-directional 4Pi Plus.2 ribbon super-tweeter providing an open and airy sound, results in perfect spaciousness not found with any conventional loudspeaker.
4Pi Technology
Immerse yourself in music - the 4Pi ribbon tweeter produces 360° surround sound, making this speaker's audio performance particularly impressive. 360 degree omnidirectional ribbon tweeter yields a resonance-free upper cut-off frequency of 53 kHz and makes this tweeter an ideal component for the reproduction of SACD and DVD-A. Its impressive and silky sound quality gives rise to airy sound that comes off easily.
The principle:
An 0.006 mm aluminum ribbon forms the membrane, which due to its low weight shows an extroardinarily high sensitivity. When a current passes this membrane it expands and contracts like a breathing cylinder. Driven by a strong neodymium magnet system, the flexible ribbon yields maximum levels up to 53,000 Hz.
Technical data
| tweeter | 1 × 4Pi II - ribbon |
| type | 1-way, addon-tweeter |
| minimum impedance | 3.5 Ω / > 10.000 Hz |
| nominal impedance | 6 Ω |
| nominal/peak power handling | 400 / 600 W |
| sensitivity | 84 - 92 dB / 2.83 V / m selectable |
| frequency range (IEC 268-5) | (10,000) ... 53,000 Hz |
| crossover frequency | 10; 12; 15 kHz selectable |
| height x width x depth | 143 × 150 × 250 mm |
| weight | 4.0 kg |
