Uploaded February 2023 | Updated September 2026, 2 weeks ago

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I thought I had covered this item before already but I didn't soooo... way overdue, let's take a look at the Hypersynth HCard H-750.

This puppy *slaps HCARD* will expand your D-50's preset memory to an insane 64 expansion cards. All holding 8 banks of 8 presets. That's 4096(!!!) presets in a single card. I think it's more than safe to say that's more than you'll ever need.

The newer version has a CNC machined metal case. But I'll be honest... I think this semi transparent look is much cooler. They say "more stable firmware" on the site as well but I have never experienced issues with this version. It's a sample size of 1 but it's something I guess :)

Totally forgot the link...

D-50 librarian: d50librarian.com