BackSID™ (6581/8580 SID replacement)

(1 customer review)

$32.00 USD

The BackSID is now back in production! A small quantity are available right away, and backorders should be filled in 2-4 weeks.

The 6581/8580 SID is very fragile and can be damaged easily. They are also very expensive on the open market. BackSID replaces the essential functionality of the SID, offering a faithful reproduction.

2 in stock (can be backordered)

SKU: BACKSID Category:


Replace your missing or broken SID with BackSID™ for Commodore 64/128:

  • Acts as fully compatible replacement for the 6581 or 8580 SID chip in all C64 and C128 revisions;
  • Sound is faithful to the original SID and gives correct intonation on most classic games;
  • Loud, clear, and punchy sound will not disappoint;
  • Supports analog & PWM potentiometer reading, allowing proper functioning of paddles, mice*, and diagnostic harnesses;
  • Configurable settings, including overdrive, filter mode, and smoothing;
  • Firmware is upgradable by running a program file from your Commodore 64/128;
  • Note: The infrequently used audio passthrough feature is unimplemented.

* Authentic Commodore mice are supported, but 3rd party adapters are not guaranteed to work.

Additional information

Weight 2 oz

1 review for BackSID™ (6581/8580 SID replacement)

  1. Wade Havens (verified owner)

    This is an awesome chip. It’s the only one I’ve seen that sounds great, is cheap, and offers potentiometer inputs. Unfortunately I need three more and they’re not in stock as of 9/22

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