Bi-Amping or Tri-Amping your speakers with an electronic crossover is the single most powerful, low cost, and simplest way for audio enthusiasts to achieve true audiophile quality. Notice to our customers: Due to ongoing supply line issues, we currently have a back-log of about 1 week. We will process orders in the order they come in. We apologize for the inconvenience. Thank you, Xkitz The XOVER-3B is a board level product ~ but if you're looking for a fully integrated plug-n-play solution, check out the K231 Stereo 3-Way Active Crossover 3-way Active Crossover - Splits the frequencies for separate sub-woofer, midrange, and tweeter amplifiers Fully balanced inputs and outputs via XLR jacks Precision impedance matched differential (+) and (-) input and output signals Audiophile grade Burr-Brown op amps, OPA1654 with 0.00005% THD+N Uses high precision filter components for ultra low distortion and pinpoint XO frequency: Metal film resistors with 1% and 0.1% precision Metalized Polypropylene Film capacitors with 2% precision All Analog Design High quality Linkwitz-Riley crossover, Constant Voltage, 4th order, 24dB/Octave The crossover frequency configuration components are located on two socketed modules – it’s very quick and easy to change the XO frequencies by simply plugging in new modules We offer a wide range of standard XO frequency modules. Simply select your desired Sub-woofer and Mid/High XO frequencies from the list below and specify them in the 'Special Instructions' box on the shopping cart page. Supports Baffle Step Compensation (BSC). The BSC gain is adjustable and the frequency is configurable to support various baffle sizes The outputs are phase aligned to within a fraction of a degree to eliminate distortion at and around the XO frequency Separate sub, mid and treble output gain adjustments via precision multi-turn pots Plug-n-play power connection from XAPS-10WB bi-polar power supply This is a mono device, two boards are needed for stereo operat