Two-way coaxial studio monitor with correctly timed FIRTEC technology



KSdigital manufactures each of its loudspeakers by hand in its factory Saarbrücken/Germany. Each loudspeaker is measured individually (IFM) and linearized in frequency and phase. This ensures the unrivalled correct reproduction of the music signal.

For over 10 years, the C-Line has been the compact listening reference in many studios around the world.  One of the main reasons for this is the coaxial principle that delivers exact information to the sound engineer even if the room’s acoustics are not ideal. A coaxial chassis avoids different run-times between bass and high-ranges.  Firstly, this means that one can sit at any distance from the sound source, and secondly, much more direct sound arrives at the listening position than is reflected from the room, which is the ideal solution for smaller listening spaces, transmission vans or in the near field at a DAW workstation.  Additionally, the KSD Reference series has now been fitted with patented Firtec/DSP that not only guarantees neutral tonality but also correctly timed reproduction.  This phase linearity permits the exact positioning of individual instruments in the virtual stereo sound stage, with each instrument precisely positioned.  Six user filters serve to adjust the set-up in one’s own studio.  An optional remote control ("KSD-RC") allows not only the access to the user EQ’s and other parameters like "delay" etc. but also allows simple adjustment of the volume and replaces an external monitor controller (with its signal editing and sound losses). Available with a cherry wood front or in complete black.



  • Overview
  • Specs
  • PDFs

As a genuine midfield monitor the C8 Reference allows a listening distance from approx. 50cm up to several meters. The available performance in combination with cabinet volume and the newly developed high-performance chassis offers the sound engineer a full-range, main monitor for small to medium size areas.  In this way, a sub-woofer is unnecessary to control the entire frequency range.  The special form of the rear-directed bass reflex port prevents audible air turbulence. The carbon fibre membrane of the newly developed 8" coaxial chassis prevents the usual break-out of the conus up to higher frequencies at the same time having an extremely low weight. The 1" self-manufactured tweeter offers the lowest harmonic distortion with a maximum in neutrality. The special coaxial design of the tweeter leads to an optimised radiation behaviour.


construction 2-way-coax, nearfild
signalprocessing in FPGA
with 24 Bit ADC - DAC
(+4 dBV)
FIRTEC™ equalization, FIR-crossover,
limiter, 6 user-EQ, patent: 19823110
tweeter 1“ neodym
bass/mid driver 8“ carbon
amplifier 80 W / 175 W
SPL (max) xxx dB
frequency range 38 - 22000 Hz
weight 11kg
incl. packaging 13 Kg
dimensions 240 x 290 x 310 mm
accessory table and wall mount inclusiv
Remote Control
KSD-RC operates
6 user-EQs, volume, delay etc.