Classic Products


These sound systems are acoustic all-rounders. Passive and 'Self Powered' variants with integrated amplifier electronics. Durable, flexible and always reliable. Proven solutions for the highest requirements.



Full power forward

The Line 212 belongs to the rare category of large, full-range systems with passive crossover. Equipped with a sophisticated filter network, the Line 212 has all virtues of a high grade, active, multiple-use system that, however, needs just one single amplifier channel. Even in the low mid-range, the FLC®-technology, developed and patented by Kling & Freitag, produces a dispersion pattern which progresses very directionally and homogeneously. In doing so, two matching speaker chassis are acoustically coupled to a column speaker (line array/line) and, using the passive FLC® electronics, they are controlled phase matched in frequency bands of different widths. The frequency-selective addition of both 12″ membranes results in a highly efficient and acoustically optimised speaker unit. In this way, the line 212 proves convincing with regard to deep bass response, high peak sound pressure and special homogeneity of the omnidirectional sound distribution. Ready, steady, go!

One for all

The high playback quality combined with the unique dispersion pattern and high achievable maximal sound pressure make the Line 212 Systems the first choice for all usages with medial acoustic range. They offer a high level of flexibility in use as a mobile PA system or in fixed installations, such as in a theatre, a conference centre, an event hall or a small stadium. Alone or combined in a cluster, horizontal or vertical, on a stage or flown – the variety of combinations with Line 212 systems is enormous. The accredited and easy-to-use ‘Click & Fly®’ system enables quick and safe setup. The Line 212 systems are optimally operated with the K&F PLM+ and D series SystemAmps, either as a full-range system or a top unit – and extended by the K&F subwoofers of the NOMOS series if needed. Always flexible, versatile, impressive!


Line 212-6: 2 x 12″/1 x 1.5″ 65° x 50° (H x V)
Line 212-9: 2 x 12″/1 x 1.5″ 90° x 50° (H x V)



K&F LINE 212-6



  • Compact, horn loaded (2 x 12″/1.5″) full range top class speaker
  • Passive operations via integrated crossover with time alignment
  • 65 x 50 degree, rotatable high frequency horn
  • FLC technology (frequency-dependent line coupling/patend)
  • SPL 137 dB peak
  • K&F SystemAmps are required for use
  • Versatile use as single system and in arrys, applicable in combination with K&F Line 212-9
  • Options for 'Outdoor' and 'Installation'
  • 'Click & Fly®', certified equipment for safe and fast set-up of horizontal and vertical clusters


2+1-way passive system with FLC-technology, completely horn loaded, bass reflex tuning
Operated with
K&F PLM+ Series, K&F D Series
K&F SystemRack1, K&F TOPAS1
Frequency response -10 dB
49 Hz – 20 kHz with C2 full range mode (65 Hz – 20 kHz without controller)
Frequency response ±3 dB
60 Hz – 18 kHz with C2 full range mode (130 Hz – 20 kHz without controller)
Nominal coverage angles
65° x 50° (high freq. horn rotatable)
Directivity index (DI)
10 (+1,5/-3) 600 Hz – 16 kHz
Power handling
600 Watt nominal
1200 Watt program
2400 Watt peak
Sensitivity 2,83 V/1 m
104 dB
137 dB (peak/1 m/far field)
1 x 12″ woofer
1 x 12″ low- mid chassis with horn attachment
1.5″ high frequency driver with 75 mm titanium dome on CD-horn
2+1-way crossover in FLC technology (patend), time and phase alignment
Impedance (nominal)
6 Ω, Zmin. 4,6 Ω
2 x speakON® NL4MP (1+/1-)
Trapezoid, frame-reinforced 15 mm birch plywood with impact proof, black structured paint (PU), 2 butterfly handles, ball proof steelgrill with exchangeable front foam
4 flying points 'allsafe JUNGFALK', 1 rear mounted flying track 'allsafe JUNGFALK'
429 x 1025 x 510 mm (W x H x D)
57.5 kg
RAL 9005 (black)
RAL Special Colour
'Installation', 'Barrier strip' instead of speakON® connectors, 'Outdoor Mobile', 'Outdoor Installation'
1 Discontinued in October 2015