New Hcard-705 Gives Yamaha DX1, DX5 Synths 400 Times More Patch Memory

Hypersynth has introduced the Hcard-705 ‘Hyper-Bank’, a new multibank cartridge solution for the Yamaha DX5 and DX1 synthesizers that gives them 400 times more patch memory.

The Hcard-705 is a multibank cartridge pair for expanding Yamaha DX5 and DX1 external memory. Hcard-705 has no internal battery, and it stores up to 400 banks per cartridge, without the worry of battery life and data loss.

The Hcard-705 is also pre-loaded with 52 voice banks per card, including:

  • Hyper-Bank voices.
  • Yamaha DX1/DX5 original voice ROMs.
  • All Hcard-701 soundbanks.
  • All Yamaha VCR-1XX cartridges.


  • Memory size for voice: Up to 800 banks (25600 Voices, card A+B).
  • Memory size for performance: Up to 400 banks (25600 Perfs, card A).
  • Loaded with 52 voice banks per card.
  • Loaded with 2 performance banks (Hyper-Bank + Yamaha Factory).
  • Instant access to different banks using touch buttons.
  • Two digits bank indicator display.
  • No need for battery.
  • Drop in replacement for “Data RAM”, “Voice ROM” and “Perf Rom” cartridge.
  • Hidden “Memory Protect” option.
  • Compatible with Yamaha DX5 and DX1.

Pricing and Availability:

The Hcard-705 is available now for $389 USD from the HyperSynth site.

4 thoughts on “New Hcard-705 Gives Yamaha DX1, DX5 Synths 400 Times More Patch Memory

  1. Ha, you could think so, but after resisting FM for years, I tried out DEXED. I was amazed at how many really useful sounds were in the mass of presets, including some very analog-sounding patches. A DX1 or 5 is a major unicorn of a thing, though. Hypersynth makes a more real-world DX7 model that contains 12,800 sounds. Got 2 years to blow?

  2. Awesome… I just had replaced a battery from my Yamaha DX5…. which I hadn’t used for years. I had lost the performance cartridge and could not find a replacement. Now that this expanded cartridge is available I look forward to re-discovering what my (Expanded) DX5 can really do.

Leave a Reply

Your email address will not be published. Required fields are marked *