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@grahamwhaley
Last active April 16, 2021 10:20
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Paxoline universal crossover details

Paxoline universal crossover

I purchased a couple of Paxoline universal crossover PCBS from Willys Hifi for a speaker project I'm building.

paxoline xover pcbs

Whilst the board has a nice silk screen, and is a relatively simple single layer thick track layout, it is not immediately obvious which component takes part in which bit of the crossover. Thus, I reverse engineered it into the below schematic. Posting here just in case it helps somebody else in the future.

paxoline xover schematic

Thanks to Willys for clarifying the 'P?' components are for 'fusible resistors', or PTCs - resettable fuses. As shown in the schematic, they are an optional component and you can choose to use the non-fused '+' outputs or the '+P' fused ones.

Ultimately I'm not using the PCBs to construct 3-way crossovers, but will use them to mount some high/low pass filters and switch connections - the schematic will help me work out if I can re-use some of the tracks or if I just use the PCBs as physical component carriers and hand-wire the rest of the circuit.

Oh, one last note - the PCB is designed to connect directly (that is, looks to be soldered to) the 4-way (quad binding post bi-wirable) speaker terminal. I purchased the 2-post version. Not a problem, as it looks pretty easy to either move the posts around or to hand-wire the inputs together. Just thought I'd note in case you really do want/need the bi-wireable ability, in which case, you probably do want to buy the 4-post connector.

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