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XSD Speaker Crossover and Waveguide GB

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bloqhed

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Joined 2020
Paid Member
XO PCB GB Status:
Name / Qnty (pair) / Country
———————————————-
Wagnju / 1 pair / Germany / paid
Statler / 1 pair / USA / big cap / paid
Bryguy / 1 pair / USA / big cap / paid
cwlo / 1 pair / USA / big cap / paid
Bkhatton / 1 pair / USA / paid
Russellc / 1 pair / USA / Big cap
JHClark / 3 pair / USA / big cap / paid
wirewiggler / 1 pair / USA / big cap / paid
jack_b / 1 pair / USA / big cap / pending
 
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bloqhed

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Everyone is all paid up. Just pending me receiving shipment of the boards themselves and we can get this show on the road! JLC says the boards are done and just waiting carrier pickup.

XO PCB GB Status:
Name / Qnty (pair) / Country
———————————————-
Wagnju / 1 pair / Germany / paid
Statler / 1 pair / USA / big cap / paid
Bryguy / 1 pair / USA / big cap / paid
cwlo / 1 pair / USA / big cap / paid
Bkhatton / 1 pair / USA / paid
Russellc / 1 pair / USA / Big cap / paid
JHClark / 3 pair / USA / big cap / paid
wirewiggler / 1 pair / USA / big cap / paid
jack_b / 1 pair / USA / big cap / pending
 
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B

bloqhed

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wirewiggler said:
I would assume cutting the trace for positive and ground of the woofer portion of the crossover so I could bi-amp would not interfere with the rest of the crossover? What is the impedance of the woofer section alone and of the tweeter and midrange together?
Click to expand...

I don't know about impedance's, so I'll leave that to X to answer, but the PCB has dual sided ground planes with loads of stitching via's, the traces are 6mm wide, given that I think cutting the traces for the woofer portion would be very painful.
 
xrk971

xrk971

Founder of XSA-Labs
Joined 2012
etsy.com/shop/XRKAudio
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I think you may be better off making a P2P crossover if you want to bi-amp. Cutting two-plane traces stitched with vias is not feasible. You want to know what the impedance sweep is for just the woofer section vs the mid+tweeter?

Here is simulation of Woofer XO impedance all by itself (4 ohms at low frequenceis to 30ohms at high frequencies):
1666036910420.png


Here is the Mid+Tweeter and no Woofer (very high below 100Hz and goes to 5ohms at high frequencies):
1666037008239.png


For completeness, here is the overall impedance for the 3-way XSDC as designed - the impedance is very smooth and no huge variations (4 ohms nominal with a mild trough at 3.5ohms and small peak at 10ohms otherwise very benign). Your amp will be much happier driving this than the crossover split up with bi-amping:
1666037234929.png
 
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bloqhed

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Boards are in everyone. I will swing by the post office today and pick up shipping materials, get everything prepped up, and start shipping the boards out in a day or two.

@jack_b sadly they did not send any extras, just the 20 ordered, if you are still interested I have a pair of boards where the tweeter positive and negative markings are reveresed. LShoot me a PM if you want them.
 
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B

bloqhed

Member
Joined 2020
Paid Member
XO PCB GB Status:
Name / Qnty (pair) / Country
———————————————-
Wagnju / 1 pair / Germany / paid
Statler / 1 pair / USA / big cap / paid
Bryguy / 1 pair / USA / big cap / paid
cwlo / 1 pair / USA / big cap / paid
Bkhatton / 1 pair / USA / paid
Russellc / 1 pair / USA / Big cap / paid
JHClark / 3 pair / USA / big cap / paid
wirewiggler / 1 pair / USA / big cap / paid
jack_b / 1 pair / USA / big cap / paid


All the boards are being shipped out first thing tomorrow morning, everything is packed up and ready to go. I got a bit busy last week and was unable to make it to the post office in time.

I've had a couple of people reach out about boards, and if there are enough people I think a second GB would make sense. A quick check of JLC shows roughly the same prices as before;
  • 5 boards - $40/pair
  • 10 boards - $24/pair
  • 15 boards - $20/pair
  • 20 boards - $18/pair
 
B

bloqhed

Member
Joined 2020
Paid Member
And they're off! Working on PM'ing everyone tracking, if you haven't received a tracking number from me in the next few hours let me know.

XO PCB GB Status:
Name / Qnty (pair) / Country
———————————————-
Wagnju / 1 pair / Germany / paid / shipped
Statler / 1 pair / USA / big cap / paid / shipped
Bryguy / 1 pair / USA / big cap / paid / shipped
cwlo / 1 pair / USA / big cap / paid / shipped
Bkhatton / 1 pair / USA / paid
Russellc / 1 pair / USA / Big cap / paid / shipped
JHClark / 3 pair / USA / big cap / paid / shipped
wirewiggler / 1 pair / USA / big cap / paid / shipped
jack_b / 1 pair / USA / big cap / paid / shipped
 
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Reactions: 1 user
J

JHClark

Member
Joined 2016
bloqhed said:
And they're off! Working on PM'ing everyone tracking, if you haven't received a tracking number from me in the next few hours let me know.

XO PCB GB Status:
Name / Qnty (pair) / Country
———————————————-
Wagnju / 1 pair / Germany / paid / shipped
Statler / 1 pair / USA / big cap / paid / shipped
Bryguy / 1 pair / USA / big cap / paid / shipped
cwlo / 1 pair / USA / big cap / paid / shipped
Bkhatton / 1 pair / USA / paid
Russellc / 1 pair / USA / Big cap / paid / shipped
JHClark / 3 pair / USA / big cap / paid / shipped
wirewiggler / 1 pair / USA / big cap / paid / shipped
jack_b / 1 pair / USA / big cap / paid / shipped
Click to expand...
Bloqhed,
No sign of your tracking number yet.
Jim Clark feel free to use: jmshclark@gmail.com .
 
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