Verifying a Meier Crossfeed Build

circuit analysistestverification

I've built a "Bass Enhanced Crossfeed" from a kit, which I believe is based on Meier's Crossfeed design.

Image from PDF Instructions

I prototyped it first on a breadboard, forgot to ground the output jack because it wasn't explicitly in the diagram. It sounded terrible. After I grounded, it seemed to sound pretty good! So I built the 'hi' version.

Now that I've built it, the low range just seems very subdued compared to my previous test. I suspect I didn't solder it correctly, though I've looked over it with a magnifying glass.

So, how can I verify the build without an oscilloscope and just a multimeter?

I've done some checking, like checking for shorts between left and right … where are the useful points to check for the right value of resistance? Between R/Lin and R/Lout? Should that be R9/7? Should I check the resistance between each leg of each capacitor?

Probably overkill, but could I put this into a simulator and see what the simulated values would be vs. actual?

Apologies.. I'm a software guy. I'd write unit tests if I could!

Best Answer

The resistance between Rin and Lin will be R5 + R6 + R7 + R9

The resistance between Rout and Lout will be R5 + R6

The resistance between either input and its output will be R7 or R9 (which I'd expect to be the same)

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