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XLR Splitter Impedance Matching - Worth It? (lemmings.world)

submitted 10 months ago by LemmyPlay@lemmings.world to c/diy@beehaw.org

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Hi all. I'm splitting 2 XLR line level audio signals into 3 channels each. I bought one nice device (used) online called the Whirlwind SPL1x3LL (line level). Unfortunately I can't find another used one for a decent price. However there are plenty of mic impedance matched units, SPL1x3MIC which according to the manufacturer are identical except the impedance difference. I'm good at soldering and the devices are fully analog (no PCB), so I'm considering doing the conversion myself.

I was curious what it would likely take to convert the mic box to a line level box? Is it just a matter of adding a resistor somewhere? Seems like an easy way to save $100 without buying a brand new unit. I looked into my line level box and the is one component I don't recognize where the out signals split away from. My only hesitation is that I buy the device and end up needing a specific part or it turns into a larger job than anticipated. Just figured I'd entertain the idea before buying brand new. Thanks.

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[–] doctorzeromd@sopuli.xyz 1 points 10 months ago (1 children)

Do you need transformer isolation? If you're not sure you almost certainly don't. I've been working in studios for 10 years and most of the time you just want a mult.

[–] LemmyPlay@lemmings.world 1 points 10 months ago

I am not sure. I want to keep the signal clean for live playing (avoiding interference, ground loop buzz, etc). I don't need studio level noise reduction but also I want to maintain signal fidelity to a reasonable degree so that there's no tone bottlenecks in my already expensive rig. Because I am an audiophile I am okay investing within reason to avoid unnecessary harmonic loss.

Part of my motivation for this splitter was that it had direct pass through on one out and a ground lift switch on the other two. I want more control over my output just in case the FOH hardware has something funky happening. I know Y-cables are another option but I got the splitter used for a lower price than Y so it was a no brainier. Getting/modding a second one is the next consideration.