The Geithain RL 933K1 is a 3-way monitor featuring K Technology (Cardioid radiation characteristics in the low range) reducing distracting rearward-directed room reflections within a 35-250Hz-frequency range. Compared to the RL933K, the RL993K1 is a more compact cabinet employed when space is an issue. The Class D RL-Amplifier is available as an alternative to the standard MOSFET amplifier in an upright standing enclosure.