straight from the manual
Alignment: Second order L/R (12 dB/octave) filters for low pass (C5 or C6) and high pass (C1). The C51-2 2-way passive crossover network includes a Clarus low pass and high pass crossover frequency of 5,700 Hz at 12 dB/octave. The C61-2 2-way passive crossover network includes a Clarus low pass and high pass crossover frequency of 5,200 Hz at 12 dB/octave. The C61-2 2-way passive crossover network includes a Clarus low pass and high pass crossover frequency of 5,200 Hz at 12 dB/octave. The use of 12 dB/octave filters on both low pass and high pass,often not found in speakers in this price range, minimizes phase-related distortion typical of crossovers with mismatched orders, ensures phase-coherent imaging and staging. The alignment topology is a shared technology to the high-end Unity U2x crossover design and features asymmetrically-aligned network components.
Network Components: Audiophile grade. The C51-2 and C61-2 passive crossover networks incorporate super high quality and low tolerance metalized polypropylene film capacitors for both highpass and low pass, in concert with air-core inductors, and low tolerance non-inductive resistors. No output level switches were used in the passive crossover design because switches add a resistive effect and are typically of extremely low quality. Additionally, “jumper pins” add an unnecessary pair of splices in the signal path to the tweeter, and were not included in our design either. Rather, all tweeter level adjustments are done on the board level with dedicated non-inductive resistors; tweeter attenuation is accomplished by selecting the appropriate output (-3 dB, 0 dB, or +3 dB) on the passive crossover circuit board. The components selected are complimentary and ensure no notable signal degradation between the input and output side of the crossovers, and serve only to filter frequency response, and not to equalize the input signal. The network componentry, design, circuitry, and polyethylene case with transparent cover are shared technologies to the Unity series, and the Unity U2x crossover design.
