Linkwitz-Riley Circuit DSP Board 2 range 2 way Speaker Active Frequency

Cla A power supply before the two-frequency electronic circuit board Descrtion:

The frequency board reference ESP company's design, set to stereo four-channel output structure,

input stereo left and right channel signal,the output 4-channel signal,

divided into left , left ba and right , right ba, you can directly promote 4-way power amplifier circuit.

The frequency is composed of the famous Linkwitz-Riley filter. Linkwitz-Riley filters are mainly used in active filter circuits, such as many sophisticated multi-tone electronic croover syst. This type of filter The filter is characterized by a decay slope of up to four bands. In other words, at every octave, the sound attenuates 24 dB of energy, ie, the attenuation slope is -24 dB / Oct (Oct Octave, an octave The meaning of interval). At the same time, the Linkwitz-Riley filter has a very flat phase response over the entire audio band (20Hz-20kHz), which is far superior to the erworth filter and does not produce phase distortions after paing through the filter. Respected by audio enthusiasts.

The main technical parameters:

* The filter type: Linkwitz-Riley filter

* Croover point: 2200HZ (ie 20-2200HZ for the ba output 2200-20000HZ for the output)

Croover points can be customized other frequencies (free custom) different speakers the best croover point is not the same, you can give me croover points , I help you calculate the parameters of the circuit re-

*The attenuation slope: -24dB / Oct

* The plate structure: Stereo four-channel output, , ba

* The op amp : JRC double precision NE5532

(of course, according to customer needs to replace other op amp such as: OPA2604AU OP275G TL072, etc.)

* Board dimensions: 134 * 76mm

*AC power supply range of dual 14 to dual 19V

*The connector: audio input / frequency output ---- 2 Lianlian socket * 3

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