The 3rd Gen K231 Active Crossover is now shipping. We currently have about a 3-4 week back-log.
Transform Your Sound System with Professional Grade Active Bi-Amping or Tri-Amping.
The K231 Stereo Electronic Crossover significantly improves the audio quality of your sound system by separating the high, mid and low frequency sounds using ultra low noise, high precision active filter circuits. This allows the use of a separate power amplifier channel for each speaker driver, and eliminates the need for passive crossovers. The result is a massively improved level of clarity and lower distortion of the sound produced. This is called Active Bi-AmpingorTri-Amping.
Our primary goal with the K231 is to bring the massive benefits of high quality analog active bi-amping into the price range that is affordable to the average audiophile. The K231 uses the highest quality audiophile grade components, and has specs that easily match those of the higher priced electronic crossovers such as Bryston and Marchand, but without the huge price tag.
Linkwitz-Riley filters, 4th order 24dB/Octave or optional 2nd order 12dB/Octave filter slope
High precision 0.1% filter components for precise XO frequency selection and ultra low distortion
Heavy internal Mu Metal shielding to prevent transformer noise from entering the audio paths
Allows you to Bi-amp or Tri-amp your sound system, or add a sub-woofer to vintage audio equipment lacking LFE
Supports 4-way or 5-way operation by cascading two K231's
All analog design using only the highest quality audiophile grade components:
Burr-Brown op-amps ~ Legendary audiophile grade op amps with .00005% Distortion
Metalized Polypropylene Film capacitors with 2% precision
Metal film resistors with 1% and 0.1% precision
ALPS metal film potentiometers
Crossover frequency and slope is selected through pluggable 'XO Modules'
Wide range of XO Modules are available to support any crossover frequency
Optional Sub channel L/R mixer to support a mono sub-woofer channel
Supports both Balanced and Unbalanced audio signaling on all inputs and outputs
Sub, Mid and High output gain front panel adjustments
Baffle Step Compensation, with adjustable gain and selectable baffle size ranges
We stock the following XO Module frequencies. When ordering, please specify your desired 'Sub' and 'Mid/High' crossover frequencies, as well as the slope (12dB or 24dB/octave) in the 'Special Instructions' box on the shopping cart page:
Any multiple of 10Hz from 40Hz-200Hz (e.g. 40Hz, 50Hz, 60Hz ... 200Hz)
250Hz, 275Hz, 350Hz, 450Hz
Any multiple of 100Hz from 300Hz-4000Hz
Any multiple of 500Hz from 4500Hz-12000Hz
You may want to experiment with various crossover frequencies and/or slopes. This can be easily done with the K231. Simply plug in a new XO Module to set a new crossover frequency.