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10F/RS225 FAST / WAW Speaker XO PCB GB

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#82
Hey X. I have all the parts now but my building plans have been postponed for a bit until I get the new shop set up in our new house. All of my audio gear and tools are starting to work their way into boxes. But, I'm really excited about having a dedicated shop space. That should help shorten my project build times immensely. I promise I'll be back strong around April/May after the dust has settled.
 
#86
Great, thanks for letting me know that they are working out well. I am finding all sorts of uses for these boards. They seem perfectly suited for a nice 2kHz crossover for an MTM with a pair of 6.5in Peerless woofers and 1in dome tweeter. I have a second inductor where a capacitor C104 once went.

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#88
I'm working on sourcing all the parts needed to build these speakers and I noticed your crossover BOM shows a quantity of 4 of the 2.2uF caps. When looking at the crossover schematics and a build of the crossover PCB, I see 3 of the 2.2uF caps being used per channel. Can you verify this?
I plan on building mine from laser cut 12mm BB plywood with .25" walnut added to the baffle for driver recessing.
Thanks and excited to get these underway!
Nate
 
#89
Yes, there are three 2.2uF caps per XO. For the paralleled pair I used a single Sonicap 4.4uF in mine.
Your cabinet plan sounds great! I also love the look of Walnut. When the weather gets warmer, I’ll start my “real” cabinets. Although, I’m thoroughly enjoying the XPS foam prototypes 😀
 
#92
Thanks for pointing that out. BOM on Post 1 updated to 6x 2.2uF film caps for stereo pair.

Product Name Sku Qty Price Total
Dayton Audio DNR-4.7 4.7 Ohm 10W Precision Audio Res 004-4.7 4 $1.09 $4.36
Dayton Audio DMPC-27 27uF 250V Polypropylene Capacitor 027-439 4 $8.58 $34.32
Dayton Audio DNR-0.51 0.51 Ohm 10W Precision Audio Res 004-.51 2 $1.38 $2.76
Dayton Audio DNR-10 10 Ohm 10W Precision Audio Res 004-10 2 $1.38 $2.76
Dayton Audio DMPC-2.2 2.2uF 250V Polypropylene Capacitor 027-415 6 $1.87 $11.22
Dayton Audio DMPC-6.8 6.8uF 250V Polypropylene Capacitor 027-424 2 $2.75 $5.50
Jantzen Audio 4.0mH 18 AWG Air Core Inductor Crossover Coil 255-280 2 $20.91 $41.82
Click to expand...
 
#93
Here is a variant of this crossover for a B80 and RS225-8. Will try it out later tonight.

Here is the speaker with new test baffle that fits the B80:
828413d1585383617-10f-8424-rs225-8-fast-waw-ref-monitor-b80-rs225-fast-build-finished-04-jpg


Here is how it measures with the stock 10F/RS225 XO (R1 changed to 3.2ohm) phase varies by about 30deg from
120Hz to 12kHz:
828553d1585427034-10f-8424-rs225-8-fast-waw-ref-monitor-b80-rs225-fast-freq-phase-mid-axis-jpg


Here is a superb step response:
828555d1585427033-10f-8424-rs225-8-fast-waw-ref-monitor-b80-rs225-fast-freq-step-mid-axis-jpg


This is the new XO that I just assembled:
828798d1585500885-10f-8424-rs225-8-fast-waw-ref-monitor-cb2a9f2d-ed27-4caf-be57-1dae2c081ea2-jpeg


828885d1585517801-10f-8424-rs225-8-fast-waw-ref-monitor-0996b827-2eea-4a83-b639-bfbe049b8955-jpeg
 
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