Description:	Single-Channel (mono) 3-Way LR Active Crossover  Filter With Balanced NOISE CANCELLING Input.
Manufacturer:	KMTech Design (UK).
Configuration:	Circuit board only, no components, buyer must assemble, instructions included.
Noise-Cancelling  Method:	On-Board Differential-Mode Receiver.
Crossover  Frequencies:	User-Definable By Changing Resistor Values.
Filtering Topology:	Linkwitz-Riley 24dB/Octave.
Operation  Amplifiers:	5x (100% GENUINE) OPA2134 Ultra-Low Noise  Op-Amps (not included with this PCB-only version).
Power Supply  Filtering:	Ceramic/Electrolytic Noise Bypass Capacitors.
Power Supply Type:	Dual 5V-0V-5V DC to 12V-0V-12V DC (see our shop  for suitable PSU).
Transformer Type:	Recommended 6VA Dual-Voltage Toroidal.
Filtering caps:	33nF/3.3nF Polyester.
Ports:	One Input, Three Output..
Power Connector:	Choice of 3 Way 5mm Terminal Block or Tyco 1-338068-2 connector.
Input Signal  Connector:	Female XLR Connector.
Output Signal  Connector:	3 x JST 6-way 3mm pin headers.
Physical  Dimensions:	80mm x 100mm x 1.6mm.
PCB Mounting:	4mm Mounting Hole Each Corner.
	A high performance active crossover filter with noise-cancelling input by  KMTech Design. Ideal for connecting to high-end audio equipment such as the Yamaha CX-A5000 AV pre-amp or similar.  If you do intend connecting these to a Yamaha 11.2 pre-amp, then buy ten PCBs and we will give you the 11th FREE.
	Let us know what crossover frequencies you need  and we will do the calculations and suggest resistor values.
	For your information, the formula for  calculating the filtering resistor values is: R = 1 / (8.89 x C x f) Where R = resistor value in Ohms f = Desired crossover frequency in Hertz C = 0.000000033 for the lower LPF/HPF pair, and 0.0000000033 for the  higher LPF/HPF pair. ***You don't need to worry about the maths! We will do all the  calculations for you!
	Please note there is no enclosure included with  this product, it is as shown in the first listing photo (a circuit board only, no components). The completed board in the second photo is for illustration only, to show you what the unit looks like after you have assembled it. Components needed to complete this product: 5 x OPA2134 ultra-low noise dual audio grade op-amps. 5 x 8-way IC sockets (optional). 1x Neutrik NC3FAAH2 female PCB horiz. mount XLR socket 1 x 3 way 5mm terminal block. 1 x Tyco 1-338068-2 connector (optional). 3 x JST 6-way 2mm pitch pin headers. 4 x 10k resistor for diff mode receiver. 20 x 11k resistor (for filtering, can supply different values depending on required crossover frequency). 3 x 100 ohm resistor. 5 x 100nF ceramic capacitor. 2 x 47uF electrolytic capacitors  10 x 33nF polyester capacitor. 10 x 3.3nF polyester capacitor. All resistors 1/4 Watt, metal film 1%. If you require a higher CMRR for the balanced input, you may wish to use 4 x 0.1% 10k precision resistors.