HIFI Preamplifier Electronical 3 Way Crossover Linkwitz-Riley Filter Crossover-point 310HZ/3.1KHz

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HIFI Preamplifier

HIFI Preamplifier with Electronical 3 Way Crossover Class A Power Linkwitz-Riley Filter 6 Channels Output Crossover-point 310HZ/3.1K Hz Model No: WHF-PACR02   This PCBA of HIFI electronical crossover is refer to the ESP design company by US, which is set to six-channel stereo output structure to output left and right...

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HIFI Preamplifier with Electronical 3 Way Crossover Class A Power Linkwitz-Riley Filter 6 Channels Output Crossover-point 310HZ/3.1K Hz

Model No: WHF-PACR02


This PCBA of HIFI electronical crossover is refer to the ESP design company by US, which is set to six-channel stereo output structure to output left and right channel stereo signal, this is, output treble of left and right channel, midrange and bass of left and right channel, you can directly connect it with 6 channel amplifier circuits then drive your HIFI speakers. Pre-electronic crossover ensures original and natural sound through separated frequency of pre-amplifier small-signal, then drive power amplifier directly to push speakers, allowing you to enjoy the atmosphere of the studio's site.

The video is a demo for a HIFI Preamplifier Electronical 3 Way Crossover Linkwitz-Riley Filter Crossover plus 3pcs 28W tube hybrid amplifier, which is just one channel.

If you need build a hifi audio stereo system, you need 3 pcs power amplifiers and 6 pcs HIFI speakers (2 pcs for bass, 2 pcs for midrange, and 2 pcs for tremble).


3 Way Crossover Linkwitz-Riley Filter Crossover + Tube Hybrid Amplifier from IWISTAO HIFI MINIMART2 on Vimeo.





Crossover PCBA is constituted by renowned Linkwitz-Riley filter. Linkwitz-Riley filter, mainly for the active filter circuit, for example, it is used in many sophisticated multi-way electronic crossover systems. The characteristics of this filter is up to 4 stages attenuation slope, in other words, every one octave frequency sound energy will be attenuated 24dB, i.e. attenuation slope of -24dB / Oct (Oct ie Octave, an octave interval of the mean). Meanwhile, in the entire audio band (20Hz-20kHz), Linkwitz-Riley filter has a very flat phase response, which is far better than Butterworth filter after filter signal, no phase distortion, which is widely admired by audiophiles.






Although many friends put a lot of money and efforts to preamplifier, unfortunately they may experiences a little frustration in final output. It is hardly difficult to solve this problem to use excellent pre-divider circuit of preamplifier plus multiple power amplifiers, our series of electronic crossover board and amplifier board can perfectly realize your dreams!



1. Excellent electronial crossover circuit with HIFI design, perfectly to reproduce original and natural sound.

2. Crossover setup easily, crossover frequency is no peaks and volley bottom.

3. Adjustable 4 channels output independently.

4. Power supply for op amp adopt the best class A power, which is more delicate and far better than LM317 337 78XX series power.

5. The circuit comes with four times gain preamplifier (if you want to change the pre-amplification, please tell the seller).

Please note: Depending on the crossover point, we calculate the resistor and capacitor parameters, and their specification will be difference with the pictures.









If you need to buy a similar finished PCBA , please click the link below.


HIFI Electronical 3 Way Crossover PCBA Class A Power Linkwitz-Riley Filter 6 Channels Output Crossover-point 310HZ/3.1K Hz 




Product Specifications

  1. Filter Type: Linkwitz-Riley filters
  2. Crossover point: 310Hz/3100Hz (i.e. 20-310HZ for bass output, 310Hz-3100Hz for midrang, 3100-20000HZ for treble output). Crossover can be customized to other frequencies (free custom). Different speaker crossover point is not the same as the best; you can give us the crossover point, we help you calculate the parameters of the circuit again on sale.
  3. Attenuation slope: -24dB / Oct. The board structure: four-channel stereo output, treble, midrange, bass of left and right channel
  4. Op-amp chip: imported JRC's NE5532 (of course, you can replace them according to your needs, such as: OPA2604AU OP275G TL072, etc.)
  5. Dimensions: 430mm * 55mm * 226mm
  6. Working voltage: AC 110V or 220V
  7. Power assumption: 30W
  8. Accessories

Power cord x 1

Remote control x 1






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Returns Policy

You may return most new, unopened items within 7 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, simply login to your account, view the order using the 'Complete Orders' link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.

Seller Guarantees

1. One year Manufacturer`s limited Warranty for defective items (excluding items damaged and/or misused after receipt). Accessories come with a 3-month warranty.

2. Defective items MUST BE reported and returned within the warranty period (with the original packaging, if possible). You must tell us what the defect is and give us your order number. WE DO NOT REPAIR OR REPLACE ITEMS WITH AN EXPIRED WARRANTY. You agree to all of the above-listed policies upon ordering on our store.

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