Description: | Single-channel (mono) Linkwitz-Riley 3-way active crossover filter (Kit form) |
Manufacturer: | KMTech Design (UK). |
Configuration: | Kit of PCB and all components, buyer must assemble. |
Noise-Cancelling Method: | Onboard differential-mode receiver (when in balanced mode). |
Crossover Frequencies: | User-definable by changing resistor values. |
Filter Gradient: | 24dB/octave. |
Operation Amplifiers: | 5 x NE5532 ultra-low noise dual audio-grade op-amps. |
Power Supply Filtering: | Ceramic/electrolytic noise bypass capacitors. |
Power Supply Type: | Dual 6V-0V-6V DC to 12V-0V-12V DC (see our shop for suitable PSU board). |
Transformer Type: | Recommended 6VA dual-voltage toroidal. |
Filtering caps: | 33nF polyester (default) . |
Port configuration: | One input, three outputs. |
Power Connector: | 3 Way 5mm terminal block. |
Input Signal Connector: | 3 Way 5mm terminal block. |
Output Signal Connector: | 2 x 3 Way 5mm terminal block. |
Physical Dimensions: | 100mm x 80mm x 1.6mm. |
PCB Mounting: | 4mm mounting hole each corner. |
A high performance active crossover filter by KMTech Design. THIS IS REV 1.4 OF THE BOARD. WE HAVE LISTENED TO YOU AND MADE THREE IMPORTANT MODIFICATIONS. 1. YOU NOW HAVE A CHOICE OF CONFIGURING THE SIGNAL INPUT AS BALANCED OR UNBALANCED USING FOUR RESISTORS. 2. THE RCA PHONO CONNECTORS HAVE BEEN REPLACED WITH 5MM TERMINAL BLOCKS. 3. THE OUTPUT RESISTORS HAVE BEEN REPLACED WITH 6MM TRIMPOTS, BUT YOU CAN STILL USE RESISTORS IF YOU PREFER. TRIMPOTS ARE SUPPLIED WITH THE KIT. | |
Let us know what crossover frequencies you need and we will get as close as possible by suggesting 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 = 0.00000033 ***You don't need to worry about the maths! We will do all the calculations for you! Happy to help! | |
Please note there is no enclosure included with this product, it is as shown in the first listing photo. Components supplied with this kit: 1x High quality fire-resistant FR-4 circuit board, designed in the UK. 5 x NE5532 ultra-low noise dual audio grade op-amps. 5 x 8-way IC sockets. 4 x 3 way 5mm terminal blocks . 1 x 100k resistor (all resistors 1/4 Watt, metal film 1%) (this resistor is for unbalanced input). 1 x 1k resistor (this resistor is for unbalanced input) . 1x wire link (for unbalanced input). 4 x 10k resistor (these resistors are for balanced input). 20 x 11k resistor (for filtering, can supply different values depending on required crossover frequency). 20 x 33nF polyester filtering capacitors. 3 x 100k 6mm trimpots (or 100 ohm resistors if you prefer). 5 x 100nF ceramic capacitor. 2 x 47uF electrolytic capacitors |